Author: "M, Naglis" - Searchworks@Jio Institute Digital Library Search Results

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51. Nuclear Modification ofψ′,χc, andJ/ψProduction ind+AuCollisions atsNN=200 GeV

Author: K. Watanabe, A. V. Kazantsev, M. Gonin, Maya Hachiya Shimomura, Y. I. Makdisi, M. Chiu, C. A. Ogilvie, Charles Maguire, T. K. Hemmick, J. M. Durham, Yasuo Miake, K. Shoji, L. Kochenda, M. Issah, J. Newby, M. J. Tannenbaum, E. Kistenev, H. Torii, L. Tomášek, A. Sukhanov, K. Kurita, B. Azmoun, Y. J. Mao, A. Král, P. Lichtenwalner, T. Murakami, D. Kawall, X. He, H. A. Gustafsson, H. Pereira, D. Hornback, T. Horaguchi, S. Rembeczki, P. W. Stankus, Y. Nakamiya, D. Lynch, H. Themann, Y. Morino, K. S. Sim, V. S. Pantuev, A. Taranenko, Y. Aramaki, I. Ravinovich, T. C. Awes, Kazushi Miki, P. Ružička, K. A. Drees, B. Meredith, M. Oka, Robert Vertesi, Kyoichiro Ozawa, T. Liška, J. S. Bok, A. Dion, M. I. Nagy, G. Baksay, S. Sawada, K. S. Lee, Jun Kikuchi, Y. Tanaka, Brajesh K. Singh, R. Pak, E. Mannel, Alice Mignerey, J. Ying, A. Franz, Viktor Riabov, John Hill, R. Yang, Johannes Peter Wessels, M. Nihashi, Marisilvia Donadelli, V. Bumazhnov, L. D'Orazio, Toru Sugitate, Gerd Joachim Kunde, Aaron Angerami, M. Bai, S. Taneja, C. Baumann, P. Liebing, J. Koster, M. Slunečka, K. S. Joo, S. P. Sorensen, I. Shein, H. J. Moon, P. L. McGaughey, D. Watanabe, W. A. Zajc, S. Tarafdar, M. Ouchida, L. Baksay, François Fleuret, K. Imai, J. Hamblen, O. Chvala, M. D. Malik, E. Vznuzdaev, V. Baublis, B. Sahlmueller, M. K. Dayananda, N. Apadula, A. Denisov, Takao Sakaguchi, C. P. Singh, K. Karatsu, K. Sedgwick, K. Das, H. Pei, V. Cianciolo, Takahiro Fusayasu, M. Wysocki, Eva Haslum, Y. J. Kim, N. Means, R. P. Pisani, D. Silvermyr, R. Tanabe, A. D. Frawley, J. G. Lajoie, J. E. Frantz, Anne Marie Sickles, A. Deshpande, Senta Greene, Prashant Shukla, Beomkyu Kim, W. J. Park, Christopher Rosen, S. Esumi, Sergey Fokin, Zhiying You, A. Yanovich, R. Bennett, D. Sharma, B. M. Johnson, S. F. Pate, I. J. Choi, M. Kawashima, Ke. Nakamura, A. T. Basye, R. Ichimiya, H. Masui, S. N. White, Deepa Thomas, J. Murata, S. Huang, F. Matathias, A. Kravitz, Masamichi Ishihara, K. B. Lee, H. Al-Bataineh, M. Finger, T. Kempel, Zvi Hirsh Citron, Dennis Perepelitsa, Martin Purschke, K. Nakano, Gary Grim, Jongmin Lee, C. A. Aidala, Kensuke Homma, W. Holzmann, E. Richardson, Minghui Liu, B. Fadem, E. O'Brien, R. J. Petti, W. E. Sondheim, Y. Fukao, K. V. Dharmawardane, R. A. Soltz, Dmitry Blau, V. Papavassiliou, D. Ivanischev, Y. Watanabe, Rushan Han, K. Boyle, M. Heffner, Kenneth Francis Read, T. Ichihara, O. Dietzsch, M. Grosse Perdekamp, E. T. Atomssa, G. R. Young, H. Valle, E. J. Desmond, T. L. Thomas, D. Roach, K. M. Kijima, T. Hester, Vladimir Samsonov, A. Morreale, I. Younus, M. E. Connors, A. Taketani, Z. Fraenkel, Dipanwita Dutta, K. Okada, D. S. Jumper, Y. Onuki, B. Bassalleck, E. Vazquez-Zambrano, T. Dahms, R. K. Choudhury, J. Sziklai, Jan Rak, S. Dairaku, H. Qu, M. Kasai, Ryugo S. Hayano, Xingguo Li, B. Love, Julia Velkovska, M. Konno, Y. Tsuchimoto, R. Lacey, Y. Iwanaga, Tamas Ferenc Csorgo, H. En'yo, R. Granier de Cassagnac, Hideki Hamagaki, K. Aoki, G. David, M. Rosati, K. I. Hahn, J. T. Mitchell, I. E. Yushmanov, J. L. Nagle, Y. Riabov, Kenta Shigaki, M. Nguyen, Alexei Khanzadeev, Brian Cole, A. Adare, N. Grau, R. Seidl, Vladislav Manko, M. J. Leitch, E. Stenlund, J. B. Choi, M. Kurosawa, S. Belikov, A. S. Nyanin, K. Tanida, T. Jones, Peter Christiansen, Motoi Inaba, R. M. Wright, Rachid Nouicer, J. H. Bhom, C. Vale, Jiangyong Jia, M. Proissl, T. V. Moukhanova, D. Winter, M. Naglis, Y. Goto, D. Yu Peressounko, C. L. Woody, D. Kleinjan, A. Caringi, Y. J. Kwon, R. Seto, I. V. Sourikova, I. Danchev, J. Jin, E. M. Takagui, K. N. Barish, R. S. Towell, I. Garishvili, F. Wei, S. Sano, C. Y. Chi, M. L. Brooks, X. Jiang, S. W. Nam, K. Fujiwara, Y. L. Yamaguchi, G. S. Kyle, K. Sakashita, Jason Kamin, M. Csanad, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, D. Jouan, Aram Kim, C. Oakley, A. Drees, James Alexander, H. W. Van Hecke, S. Bathe, Agneta Oskarsson, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Y. Akiba, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Alexandre Lebedev, Rui Wei, D. M. Lee, A. Kiss, Sung Keun Park, Henner Buesching, N. N. Ajitanand, Steve Edwards, B. Komkov, Takahiro Nakamura, D. McGlinchey, Susumu Oda, J. H. Kang, A. Durum, Marcus Hohlmann, J. S. Haggerty, Norio Saito, Tsutomu Mibe, L. A. Linden Levy, M. A. L. Leite, Catherine Micaela Silvestre, K. Yamaura, R. Belmont, Hongfang Liu, D. E. Fields, J. S. Kapustinsky, V. Babintsev, Y. S. Lai, B. V. Jacak, Jen-Chieh Peng, Y. Ikeda, M. McCumber, C. Pinkenburg, Inkyu Park, G. Roche, Xiong Wang, Z. Conesa del Valle, J. Hanks, Dong Jo Kim, S. Yokkaichi, A. Veicht, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, V. Singh, A. Glenn, Eunja Kim, M. Virius, Manabu Togawa, C. H. Chen, A. Enokizono, P. Chung, A. Datta, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Butsyk, S. Zhou, S. D. Rolnick, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, D. Isenhower, and A. Toia
Subjects: Physics, Meson, 010308 nuclear & particles physics, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Super Proton Synchrotron, Charged particle, Nuclear physics, Deuterium, 0103 physical sciences, Yield ratio, High Energy Physics::Experiment, Multiplicity (chemistry), Atomic physics, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: We present results for three charmonia states (psi' chi(c), and J/ psi) in d + Au collisions at vertical bar y vertical bar < 0.35 and root s(NN) = 200 GeV. We find that the modification of the psi' yield relative to that of the J/ psi scales approximately with charged particle multiplicity at midrapidity across p + A, d + Au, and A + A results from the Super Proton Synchrotron and the Relativistic Heavy Ion Collider. In large-impact-parameter collisions we observe a similar suppression for the psi' and J/ psi, while in small-impact-parameter collisions the more weakly bound psi' is more strongly suppressed. Owing to the short time spent traversing the Au nucleus, the larger psi' suppression in central events is not explained by an increase of the nuclear absorption owing to meson formation time effects.
Published: 2013

52. Freeze-out dynamics via charged kaon femtoscopy insNN=200GeV central Au + Au collisions

Author: L. Adamczyk, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, C. D. Anson, A. Aparin, D. Arkhipkin, E. Aschenauer, G. S. Averichev, J. Balewski, A. Banerjee, Z. Barnovska, D. R. Beavis, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, null Bhattarai, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, A. V. Brandin, S. G. Brovko, E. Bruna, S. Bültmann, I. Bunzarov, T. P. Burton, J. Butterworth, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, Z. Chang, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, P. Chung, J. Chwastowski, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, X. Cui, S. Das, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, R. Derradi de Souza, S. Dhamija, B. di Ruzza, L. Didenko, null Dilks, F. Ding, A. Dion, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, L. E. Dunkelberger, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, K. S. Engle, G. Eppley, L. Eun, O. Evdokimov, R. Fatemi, S. Fazio, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, Y. Fisyak, C. E. Flores, C. A. Gagliardi, D. R. Gangadharan, D. Garand, F. Geurts, A. Gibson, S. Gliske, O. G. Grebenyuk, D. Grosnick, Y. Guo, A. Gupta, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, R. Haque, J. W. Harris, J. P. Hays-Wehle, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, S. Horvat, B. Huang, H. Z. Huang, P. Huck, T. J. Humanic, G. Igo, W. W. Jacobs, C. Jena, E. G. Judd, S. Kabana, K. Kang, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, A. Kesich, D. P. Kikola, J. Kiryluk, I. Kisel, A. Kisiel, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, W. Korsch, L. Kotchenda, P. Kravtsov, K. Krueger, I. Kulakov, L. Kumar, R. A. Kycia, M. A. C. Lamont, J. M. Landgraf, K. D. Landry, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, X. Luo, G. L. Ma, Y. G. Ma, D. M. M. D. Madagodagettige Don, D. P. Mahapatra, R. Majka, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, Md. Nasim, T. K. Nayak, J. M. Nelson, L. V. Nogach, J. Novak, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, M. Pachr, B. S. Page, S. K. Pal, Y. X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, W. Peryt, P. Pile, M. Planinic, J. Pluta, D. Plyku, N. Poljak, J. Porter, A. M. Poskanzer, C. B. Powell, C. Pruneau, N. K. Pruthi, M. Przybycien, P. R. Pujahari, J. Putschke, H. Qiu, S. Ramachandran, R. Raniwala, S. Raniwala, R. L. Ray, C. K. Riley, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, J. F. Ross, A. Roy, L. Ruan, J. Rusnak, N. R. Sahoo, P. K. Sahu, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, A. M. Schmah, B. Schmidke, N. Schmitz, T. R. Schuster, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, B. Sharma, M. Sharma, W. Q. Shen, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, R. N. Singaraju, M. J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, J. H. Thomas, A. R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, J. Turnau, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, R. Vertesi, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, A. Vossen, M. Wada, M. Walker, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, H. Wieman, S. W. Wissink, R. Witt, Y. F. Wu, Z. Xiao, W. Xie, K. Xin, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, null Yan, C. Yang, Y. Yang, P. Yepes, L. Yi, K. Yip, I-K. Yoo, Y. Zawisza, H. Zbroszczyk, W. Zha, J. B. Zhang, S. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, Y. Zoulkarneeva, and M. Zyzak
Subjects: Physics, Source function, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, Resonance, Bose–Einstein correlations, 01 natural sciences, Nuclear physics, Pion, Correlation function, 0103 physical sciences, Quark–gluon plasma, Transverse mass, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Scaling
Abstract: We present measurements of three-dimensional correlation functions of like-sign, low-transverse-momentum kaon pairs from root sNN = 200 GeV Au + Au collisions. A Cartesian surface-spherical harmonic decomposition technique was used to extract the kaon source function. The latter was found to have a three-dimensional Gaussian shape and can be adequately reproduced by Therminator event-generator simulations with resonance contributions taken into account. Compared to the pion one, the kaon source function is generally narrower and does not have the long tail along the pair transverse momentum direction. The kaon Gaussian radii display a monotonic decrease with increasing transverse mass m(T) over the interval of 0.55
Published: 2013

53. Spectra and ratios of identified particles in Au+Au andd+Au collisions atsNN=200GeV

Author: N. Apadula, B. Azmoun, A. Král, M. Oka, P. Liebing, S. Esumi, D. Sharma, R. Ichimiya, P. Tarján, Y. J. Mao, Martin Purschke, C. A. Aidala, Y. Fukao, I. Tserruya, A. K. Purwar, K. Fujiwara, Charles Maguire, Maya Hachiya Shimomura, A. Morreale, D. Kawall, C. Silvestre, K. Karatsu, Z. Fraenkel, Gary Grim, Yu. Efremenko, R. K. Choudhury, Jongmin Lee, Y. L. Yamaguchi, K. V. Dharmawardane, Anne Marie Sickles, J. H. Kang, Y. I. Makdisi, V. Singh, H. Themann, J. S. Haggerty, T. Hester, V. S. Pantuev, D. Lynch, E. Leitner, A. Taketani, G. S. Kyle, James Alexander, Marisilvia Donadelli, V. Bumazhnov, O. Dietzsch, M. I. Nagy, D. Watanabe, M. D. Malik, E. Vznuzdaev, N. A. Sparks, R. S. Towell, I. Garishvili, F. Wei, K. N. Barish, S. Nam, D. S. Jumper, R. Tanabe, E. T. Atomssa, H. Valle, M. K. Dayananda, M. Wysocki, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, M. J. Tannenbaum, S. Sano, T. Sato, Dipanwita Dutta, A. Glenn, G. R. Young, H. W. Van Hecke, H. Torii, T. Dahms, E. Kistenev, P. Lichtenwalner, H. Qu, A. Kim, Hideki Hamagaki, K. Aoki, Y. S. Lai, R. Pak, N. Kamihara, N. Grau, J. Murata, Eunja Kim, Julia Velkovska, A. Yu. Semenov, S. Dairaku, S. Rembeczki, K. A. Drees, S. N. White, Deepa Thomas, Zvi Hirsh Citron, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, G. David, A. Kiss, Kyeongpil Lee, S. P. Sorensen, M. Rosati, R. Vértesi, Hongfang Liu, D. E. Fields, B. V. Jacak, Senta Greene, A. T. Basye, K. Nakano, J. Hamblen, Aaron Angerami, Tadaaki Isobe, J. P. Wood, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, Beomkyu Kim, K. Boyle, J. Ide, Henner Buesching, Gerd Joachim Kunde, Wei Xie, M. Ouchida, N. Means, Steve Edwards, M. Virius, K. Okada, Rushan Han, Motoi Inaba, M. McCumber, W. A. Zajc, O. Drapier, Frank Ellinghaus, B. Fadem, E. O'Brien, I. Shein, R. M. Wright, Y. Tanaka, W. E. Sondheim, D. Ivanischev, Mate Csanad, C. M. Camacho, Prashant Shukla, S. F. Pate, Philippe Rosnet, Alice Mignerey, K. S. Sim, E. R. Kinney, D. P. Morrison, M. L. Brooks, K. Watanabe, V. Baublis, A. Denisov, L. D'Orazio, H. En'yo, E. Mannel, S. Yokkaichi, A. A. Vinogradov, Ke. Nakamura, S. Campbell, Vladimir Samsonov, V. Cianciolo, M. J. Leitch, P. A. Rukoyatkin, T. Ichihara, R. A. Soltz, C. H. Chen, C. Oakley, A. Drees, K. Shoji, H. Al-Bataineh, O. Chvala, J. Hanks, Alexandre Lebedev, Sergey Fokin, M. Nihashi, Marcus Hohlmann, B. Love, Takahiro Fusayasu, Tatsuya Chujo, Jiangyong Jia, Y. Goto, H. J. Moon, L. Baksay, T. Horaguchi, P. L. McGaughey, P. W. Stankus, T. L. Thomas, Y. Ikeda, D. Isenhower, Jen-Chieh Peng, Sung Keun Park, D. M. Lee, I. Ravinovich, K. Das, M. Grosse Perdekamp, Seong H. Kim, Alexander Malakhov, C. Y. Chi, A. Toia, N. N. Ajitanand, L. A. Linden Levy, K. Sakashita, Takao Sakaguchi, E. P. Hartouni, H. Pei, J. E. Frantz, Tamas Ferenc Csorgo, M. E. Connors, Y. J. Kwon, Ryugo S. Hayano, K. Sedgwick, M. Bai, R. P. Pisani, J. G. Lajoie, Inkyu Park, D. Kleinjan, J. L. Nagle, Xiong Wang, V. Papavassiliou, K. Kiriluk, Z. Conesa del Valle, H. A. Gustafsson, Takahiro Nakamura, A. D. Frawley, Y. Riabov, D. Silvermyr, Kenta Shigaki, Alexei Khanzadeev, Dong Jo Kim, C. Pinkenburg, S. Bathe, T. Murakami, D. McGlinchey, C. Baumann, A. G. Litvinenko, M. Nguyen, R. Yang, I. J. Choi, A. Kravitz, E. H. Kim, Agneta Oskarsson, C. Zhang, Susumu Oda, A. Deshpande, Jason Kamin, E. Stenlund, A. Dion, K. B. Lee, S. Kametani, L. S. Zolin, Taku Gunji, H. Gong, J. Seele, X. Jiang, A. Veicht, G. Roche, S. Huang, J. B. Choi, S. P. Stoll, A. S. Nyanin, W. J. Park, T. Kempel, F. Kajihara, P. Ružička, Y. Berdnikov, Y. Akiba, A. Durum, C. P. Singh, Zhiying You, K. Tanida, Rachid Nouicer, D. Kotchetkov, M. Proissl, Johannes Peter Wessels, R. Bennett, Christopher Rosen, A. V. Kazantsev, Dong-Hun Kim, S. Taneja, M. Mishra, W. Holzmann, M. Kawashima, S. Nagamiya, S. S.E. Rosendahl, T. Jones, Peter Christiansen, B. M. Johnson, G. Bunce, Viktor Riabov, K. Yamaura, M. Finger, A. Kozlov, D. Winter, R. Seto, A. Yanovich, C. L. Woody, A. Berdnikov, Vaclav Vrba, Klaus Johannes Reygers, D. Yu Peressounko, J. H. Bhom, R. J. Petti, K. Imai, S. Butsyk, Rui Wei, L. Tomášek, D. Jouan, A. Isupov, T. V. Moukhanova, D. Roach, P. Mikeš, S. Zhou, I. Danchev, S. Sawada, Dmitry Blau, Y. Onuki, X. He, K. M. Kijima, J. Sziklai, S. D. Rolnick, J. Ying, Jan Rak, A. Franz, M. Chiu, E. J. Desmond, B. Meredith, Y. Aramaki, V. Peresedov, R. Lacey, C. A. Ogilvie, M. Togawa, Kisung Lee, T. K. Hemmick, E. Vazquez-Zambrano, J. Park, T. C. Awes, R. Granier de Cassagnac, Kyoichiro Ozawa, T. Liška, J. M. Durham, Yasuo Miake, J. S. Bok, A. Rakotozafindrabe, Brian Cole, J. Koster, A. Adare, A. Caringi, Jun Kikuchi, M. Kurosawa, Y. Watanabe, M. Kasai, Y. Tsuchimoto, Y. Iwanaga, B. Komkov, John Hill, Xingguo Li, L. Kochenda, M. Issah, I. E. Yushmanov, H. Masui, Toru Sugitate, A. Enokizono, P. Chung, Norio Saito, I. Younus, Tsutomu Mibe, M. Gonin, Minghui Liu, A. A. Bickley, M. Heffner, Kenneth Francis Read, M. A. L. Leite, A. Datta, I. V. Sourikova, François Fleuret, A. Sukhanov, K. Kurita, H. Pereira, R. Belmont, J. S. Kapustinsky, V. Babintsev, Y. Morino, J. Jin, E. M. Takagui, M. Naglis, Masayasu Ishihara, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, K. I. Hahn, B. Bassalleck, M. Konno, Y. Nakamiya, G. Baksay, B. Sahlmueller, Y. J. Kim, J. T. Mitchell, R. Seidl, S. Tarafdar, Vladislav Manko, M. Slunečka, S. Belikov, Eva Haslum, B. Lenzi, C. Vale, S. Afanasiev, J. Newby, D. Hornback, A. Taranenko, Kazushi Miki, Brajesh K. Singh, and K. S. Joo
Subjects: Physics, Nuclear and High Energy Physics, Nuclear Theory, Hadron, Spectral line, Nuclear physics, Pion, Deuterium, Transverse momentum, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Relativistic Heavy Ion Collider, Nucleon, Bar (unit)
Abstract: The transverse momentum (p(T)) spectra and ratios of identified charged hadrons (pi(+/-), K-+/-, p, (p) over bar) produced in root s(NN) = 200 GeV Au + Au and d + Au collisions are reported in five different centrality classes for each collision species. The measurements of pions and protons are reported up to p(T) = 6 GeV/c (5 GeV/c), and the measurements of kaons are reported up to p(T) = 4 GeV/c (3.5 GeV/c) in Au + Au (d + Au) collisions. In the intermediate p(T) region, between 2 and 5 GeV/c, a significant enhancement of baryon-to-meson ratios compared to those measured in p + p collisions is observed. This enhancement is present in both Au + Au and d + Au collisions and increases as the collisions become more central. We compare a class of peripheral Au + Au collisions with a class of central d + Au collisions which have a comparable number of participating nucleons and binary nucleon-nucleon collisions. The p(T)-dependent particle ratios for these classes display a remarkable similarity, which is then discussed.
Published: 2013

54. Inclusive cross section and single transverse spin asymmetry for very forward neutron production in polarizedp+pcollisions ats=200 GeV

Author: P. Tarján, Ryugo S. Hayano, M. Rosati, Maya Hachiya Shimomura, Vladimir Samsonov, Y. I. Makdisi, Y. Riabov, Kenta Shigaki, M. Nguyen, A. Yu. Semenov, J. Gosset, A. A. Vinogradov, A. S. Nyanin, Rachid Nouicer, Jiangyong Jia, Y. Goto, M. J. Tannenbaum, K. S. Sim, H. Torii, V. Dzhordzhadze, C. L. Woody, A. Berdnikov, S. Afanasiev, Y. Kwon, D. Mukhopadhyay, S. Rembeczki, A. Ster, Senta Greene, R. Yang, Tamas Ferenc Csorgo, S. Yokkaichi, A. T. Basye, M. I. Nagy, M. Issah, I. V. Sourikova, B. Meredith, Takafumi Niida, John Hill, B. Fadem, E. O'Brien, J. L. Nagle, M. Ouchida, N. Means, K. Imai, J. Asai, J. Newby, Shingo Sakai, M. Wysocki, A. A. Bickley, M. D. Malik, E. Vznuzdaev, Toru Sugitate, Y. Fukao, Minghui Liu, H. Pei, O. Dietzsch, H. Iinuma, Y. J. Mao, T. Horaguchi, Takao Sakaguchi, R. A. Soltz, H. Borel, E. T. Atomssa, H. Valle, J. H. Kang, K. B. Lee, C. Klein-Boesing, M. Heffner, Kenneth Francis Read, A. D. Frawley, Dipanwita Dutta, T. Hester, François Fleuret, J. S. Haggerty, D. Hornback, A. P.T. Palounek, R. Pak, S. Bathe, Julia Velkovska, T. Ichihara, S. Huang, M. Grosse Perdekamp, Anne Marie Sickles, N. Kamihara, W. Holzmann, Marisilvia Donadelli, V. Bumazhnov, Takahiro Fusayasu, A. Adare, A. Taranenko, Kazushi Miki, Alexander Malakhov, Y. Nakamiya, A. Hadj Henni, G. R. Young, S. Sawada, D. Silvermyr, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, K. A. Drees, Brajesh K. Singh, V-N. Tram, N. Grau, Taku Gunji, H. Gong, J. Seele, A. Drees, Vaclav Vrba, H. A. Gustafsson, Klaus Johannes Reygers, L. S. Zolin, R. Tanabe, D. Layton, W. J. Park, D. Winter, D. Yu Peressounko, Y. Onuki, F. Kajihara, J. Ying, A. Franz, Jan Rak, R. Lacey, C. Zhang, P. D. Barnes, A. Yanovich, G. Baksay, Y. Tanaka, W. C. Chang, K. Sakashita, Motoi Inaba, Beomkyu Kim, E. Mannel, Y. S. Lai, K. O. Eyser, A. K. Purwar, K. Fujiwara, R. Granier de Cassagnac, R. Vértesi, N. N. Ajitanand, Wei Xie, D. Roach, Mate Csanad, C. M. Camacho, Prashant Shukla, S. Butsyk, P. Ružička, S. F. Pate, Y. Ikeda, H. Al-Bataineh, Jason Kamin, S. N. White, K. M. Kijima, J. G. Boissevain, Tadaaki Isobe, S. P. Stoll, Rushan Han, X. He, S. Zhou, A. Baldisseri, S. D. Rolnick, L. Baksay, Viktor Riabov, Zvi Hirsh Citron, V. Peresedov, K. Nakano, Eva Haslum, B. Lenzi, K. N. Barish, W. E. Sondheim, S. S.E. Rosendahl, B. Sahlmueller, P. L. McGaughey, G. Bunce, D. Ivanischev, V. Papavassiliou, J. L. Charvet, Charles Maguire, C. Pinkenburg, K. Das, David D'Enterria, K. Boyle, P. A. Rukoyatkin, H. W. Van Hecke, J. T. Mitchell, M. Chiu, A. Churyn, E. P. Hartouni, D. Jouan, Kiyoshi Tanida, M. Stepanov, G. Roche, P. Chung, J. Koster, R. Seidl, A. V. Kazantsev, Vladislav Manko, H. Qu, E. Kistenev, Xingguo Li, Takahiro Nakamura, J. Imrek, W. A. Zajc, M. Slunečka, M. Gonin, L. Tomášek, A. Kiss, V. Baublis, A. Denisov, J. E. Frantz, Ajit Kumar Mohanty, V. Cianciolo, T. A. Shibata, C. A. Ogilvie, T. Sato, T. K. Hemmick, Y. Tomita, Sergey Fokin, Henner Buesching, Alexei Khanzadeev, Yasuo Miake, S. Batsouli, H. Masui, A. K. Dubey, Johannes Peter Wessels, D. Isenhower, A. Toia, L. Kochenda, S. Belikov, L. Mašek, E. Stenlund, T. C. Awes, Kyoichiro Ozawa, T. Liška, Jun Kikuchi, Susumu Oda, B. Love, V. S. Pantuev, A. Sukhanov, K. Kurita, H. Pereira, Marcus Hohlmann, C. Vale, A. Durum, A. G. Litvinenko, T. V. Moukhanova, Hideki Hamagaki, K. Aoki, B. S. Chang, A. Kozlov, R. Seto, K. Haruna, Y. Morino, E. J. Desmond, Catherine Micaela Silvestre, P. Mikeš, K. Yamaura, K. Okada, G. David, M. Togawa, J. Park, A. Rakotozafindrabe, E. H. Kim, H. En'yo, J. Klay, Y. Tsuchimoto, F. Matathias, M. J. Leitch, I. E. Yushmanov, D. E. Fields, Kensuke Homma, B. V. Jacak, M. L. Brooks, S. P. Sorensen, P. Constantin, S. Chernichenko, I. Ravinovich, M. McCumber, A. Deshpande, B. Bassalleck, H. Liu, K. Shoji, M. Konno, Seong H. Kim, M. Bai, Y. Watanabe, I. Younus, P. W. Stankus, J. G. Lajoie, A. Soldatov, Tae-Yeon Lee, M. Naglis, Martin Purschke, C. L. Silva, Y. L. Yamaguchi, B. Komkov, I. J. Choi, A. Kravitz, Masayasu Ishihara, C. A. Aidala, R. Bennett, F. Staley, D. Kawall, H. Themann, Norio Saito, M. A. L. Leite, J. Murata, Gerd Joachim Kunde, M. Finger, S. Dairaku, A. Morreale, I. Shein, K. Sedgwick, J. S. Kapustinsky, Z. Fraenkel, O. Zaudtke, V. Babintsev, T. Kempel, Dong-Hun Kim, G. S. Kyle, M. Virius, James Alexander, R. Averbeck, R. K. Choudhury, Byung-Sik Hong, A. Bazilevsky, B. Azmoun, A. Král, Philippe Rosnet, C. Baumann, S. Kametani, M. J. Kweon, C. P. Singh, Alexandre Lebedev, B. M. Johnson, D. M. Lee, A. Isupov, C. Suire, J. Sziklai, K. Kiriluk, Brian Cole, M. Kurosawa, M. Oka, A. Dion, A. Glenn, A. Enokizono, P. Liebing, J. Jin, E. M. Takagui, K. S. Joo, R. S. Towell, I. Garishvili, F. Wei, Laurent Bernard Aphecetche, S. Esumi, D. Sharma, R. Ichimiya, D. Lynch, A. Taketani, C. Y. Chi, V. L. Rykov, T. Dahms, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, V. E. Semenov, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, V. Singh, Jen-Chieh Peng, Xiong Wang, Dong Jo Kim, A. Veicht, and T. L. Thomas
Subjects: Elastic scattering, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, media_common.quotation_subject, Nuclear Theory, HERA, 01 natural sciences, 7. Clean energy, Asymmetry, Nuclear physics, Momentum, Pion, 0103 physical sciences, High Energy Physics::Experiment, Neutron, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Spin-½, media_common
Abstract: The energy dependence of the single-transverse-spin asymmetry, A(N), and the cross section for neutron production at very forward angles were measured in the PHENIX experiment at the Relativistic Heavy Ion Collider for polarized p + p collisions at root s = 200 GeV. The neutrons were observed in forward detectors covering an angular range of up to 2.2 mrad. We report results for neutrons with a momentum fraction of x(F) = 0.45 to 1.0. The energy dependence of the measured cross sections were consistent with x(F) scaling, compared to measurements by an experiment at the Intersecting Storage Ring, which measured neutron production in unpolarized p + p collisions at root s = 30.6-62.7 GeV. The cross sections for large x(F) neutron production for p + p collisions, as well as those in e + p collisions measured at the Hadron-Electron Ring Accelerator, are described by a pion exchange mechanism. The observed forward neutron asymmetries were large, reaching A(N) = -0.08 +/- 0.02 for x(F) = 0.8; the measured backward asymmetries, for negative x(F), were consistent with zero. The observed asymmetry for forward neutron production is discussed within the pion exchange framework, with interference between the spin-flip amplitude due to the pion exchange and nonflip amplitudes from all Reggeon exchanges. Within the pion exchange description, the measured neutron asymmetry is sensitive to the contribution of other Reggeon exchanges even for small amplitudes.
Published: 2013

55. Measurement ofJ/ψAzimuthal Anisotropy inAu+AuCollisions atsNN=200 GeV

Author: Zubayer Ahammed, M. J. LeVine, B. Pawlik, M. Naglis, Q. Y. Shou, Xiangming Sun, P. Seyboth, M. Zyzak, H. Z. Huang, Leszek Adamczyk, R. Derradi de Souza, A. Gibson, Y. F. Wu, Madan M. Aggarwal, Fuqiang Wang, J. L. Drachenberg, Olga Evdokimov, Barbara Antonina Trzeciak, S. Vokal, N. K. Pruthi, Basanta Kumar Nandi, M. Shao, Y. X. Pan, G. Van Buren, F. Videbæk, G. Webb, Jay Roberts, A. Dion, K. Yip, N. Xu, S. S. Shi, A. Vossen, Sukalyan Chattopadhyay, H. W. Ke, J. S. Wang, P. Filip, B. Di Ruzza, R. R. Debbe, J. L. Romero, J. Kiryluk, J. H. Chen, Chitrasen Jena, P. Pile, E. Finch, I. Kisel, O. D. Tsai, G. Wang, G. D. Westfall, Y. P. Lu, J. M. Nelson, M. Elnimr, M. C. Cervantes, Vitaly Okorokov, Bernd Surrow, Jorn Henning Putschke, A. V. Brandin, C. D. Anson, Thorsten Sven Kollegger, W. Peryt, J. K. Adkins, W. J. Llope, P. Chung, K. Xin, A. Ohlson, D. Garand, R. Fatemi, Michael Joseph Betancourt, Z. J. Sun, S. Heppelmann, Wei Xie, D. Solanki, J. Engelage, G. Eppley, A. Aparin, G. M.S. Vasconcelos, A. M. Poskanzer, B. Schmidke, K. Krueger, L. Eun, David Jonathan Hofman, T. P. Burton, M. J.M. Codrington, H. Masui, C. A. Gagliardi, J. A. Vanfossen, J. Pluta, Y. Pandit, J. B. Zhang, D. D. Koetke, J. E. Draper, R. Witt, A. Kechechyan, A. Kesich, M. J. Skoby, R. Cendejas, R. A.N. Oliveira, M. Pachr, C. K. Riley, S. Mioduszewski, N. Schmitz, X. Li, J. M. Landgraf, S. Ramachandran, L. Kotchenda, Sevil Salur, Y. Wang, Donald M. McDonald, R. S. Longacre, Pradip Kumar Sahu, W. Li, Elena Bruna, B. Huang, E. Shahaliev, Prithwish Tribedy, B. K. Srivastava, M. M. Mondal, J. Takahashi, M. Cherney, Lokesh Kumar, M. Strikhanov, J. Konzer, Rene Bellwied, D. Tlusty, I. G. Bordyuzhin, Mirko Planinic, Y. H. Zhu, L. M. Lima, I. Sakrejda, R. E. Tribble, S. Fazio, J. Rusnak, T. J. Humanic, Jize Zhao, I. Kulakov, Bedangadas Mohanty, Xiaofeng Luo, Y. Xu, P. Chaloupka, Guo-Liang Ma, Gerald W Hoffmann, H. Qiu, J. Sandweiss, Nasim, M. Tokarev, Jaroslav Bielcik, Y. Fisyak, G. Igo, J. Novak, Stephen V. Gliske, B. Sharma, J. Bouchet, Z. J. Xu, C. A. Whitten, A. K. Bhati, D. Keane, Haiyan Wang, S. Trentalange, Y. Yang, Z. P. Zhang, Nikolai Smirnov, R. Stock, A. S. Hirsch, L. Ruan, K. D. Landry, K. Kauder, J. Butterworth, F. Liu, K. Oh, Mariusz Przybycien, T. D. S. Stanislaus, L. G. Efimov, T. K. Nayak, P. Kravtsov, A. M. Schmah, D. M.M.D. Madagodagettige Don, D. R. Gangadharan, M. K. Mustafa, L. Yi, S. LaPointe, Nilay Shah, H. G. Ritter, E. Flores, F. Ding, R. Varma, A. Chikanian, R. G. Fersch, X. Z. Cai, H. H. Wieman, Jian Deng, Y. Panebratsev, S. K. Gupta, D. Grosnick, Xuan Zhang, Hanna Paulina Zbroszczyk, Y. Li, R. Corliss, James Prewitt Hays-Wehle, B. S. Page, D. P. Kikola, O. Hajkova, X. L. Wang, G. Agakishiev, D. P. Mahapatra, Z. Chang, O. V. Rogachevskiy, D. R. Beavis, L. C. Bland, B. Stringfellow, F. Zhao, Zhiming Li, P. Huck, C. Zhong, E. C. Aschenauer, A. Sandacz, M. Wada, A. Luszczak, Li-Yi Chen, Q. H. Xu, J. Turnau, D. Cebra, M. A.C. Lamont, Anthony Robert Timmins, Adam Ryszard Kisiel, L-X. Han, S. G. Brovko, R. D. Majka, R. N. Singaraju, S. Margetis, L. Xue, J. G. Cramer, Sergey Voloshin, Zhigang Xiao, H. J. Crawford, M. Sharma, E. Sangaline, D. Arkhipkin, A. Hamed, M. C. Suarez, D. N. Svirida, W. Xu, Wolfgang Korsch, J. Y. Chen, W. Borowski, Z. Barnovska, Xiaofeng Zhu, E. W. Oldag, T. S. McShane, P. Bhattarai, J. Schambach, X. Dong, Michal Sumbera, A. A. P. Suaide, Xiangyuan Cui, W. Christie, S. K. Pal, Justin Stevens, J. C. Webb, Y. J. Sun, A. Ogawa, H. F. Chen, S. Kabana, Marcelo Gameiro Munhoz, Y. P. Viyogi, S. Bültmann, M. Zawisza, H. M. Spinka, S. W. Wissink, C-Q. Li, T. G. Dedovich, Y. Zhang, R. P. Scharenberg, Christina Markert, A. Banerjee, Nikola Poljak, E. P. Sichtermann, J. Porter, D. Smirnov, H. S. Matis, I. G. Alekseev, L. H. Tarini, M. A. Lisa, W. W. Jacobs, I. K. Yoo, J. Lauret, H. Pei, J. Balewski, Rashmi Raniwala, Janet Elizabeth Seger, R. Lednicky, Claude Andre Pruneau, T. Tarnowsky, P. Djawotho, E. G. Judd, H. Bichsel, G. Odyniec, Anju Bhasin, Y. Zoulkarneeva, J. H. Thomas, U. G. Desouza, J. F. Ross, T. Ullrich, Q. Wang, Jana Bielcikova, N. R. Sahoo, A. Lebedev, T. R. Schuster, G. S. Averichev, P. R. Pujahari, C. B. Powell, I. Koralt, Kejun Kang, L. V. Nogach, C. M. Du, H. S. Xu, Sumit R. Das, P. Sorensen, G. Van Nieuwenhuizen, Jongmin Lee, R. L. Ray, T. Ljubicic, L. Didenko, H. Caines, Sudhir Raniwala, William Axel Leight, Yinina Ma, S. R. Klein, L. E. Dunkelberger, D. L. Olson, Anik Gupta, Frank Jm Geurts, Jifa Tian, S. H. Zhang, B. Haag, Zebo Tang, Janusz Chwastowski, S. Dhamija, C. Perkins, J. W. Harris, P. Yepes, A. Davila Leyva, A. H. Tang, I. Bunzarov, M. Calderon De La Barca Sanchez, J. Alford, W. Guryn, O. G. Grebenyuk, J. Fedorisin, Russell Richard Betts, D. G. Underwood, J. Cheng, T. J. M. Symons, L. C. De Silva, S. Horvat, A. Szanto de Toledo, J. Kapitan, M. K. Mitrovski, T. Pawlak, Y. Mohammed, A. Sarkar, and J. C. Dunlop
Subjects: Coalescence (physics), Physics, Particle physics, 010308 nuclear & particles physics, Elliptic flow, General Physics and Astronomy, Elementary particle, 01 natural sciences, Charm quark, Nuclear physics, Transverse plane, 0103 physical sciences, Quark–gluon plasma, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Anisotropy
Abstract: The measurement of J/psi azimuthal anisotropy is presented as a function of transverse momentum for different centralities in Au + Au collisions at root s(NN) = 200 GeV. The measured J/psi elliptic flow is consistent with zero within errors for transverse momentum between 2 and 10 GeV/c. Our measurement suggests that J/psi particles with relatively large transverse momenta are not dominantly produced by coalescence from thermalized charm quarks, when comparing to model calculations.
Published: 2013

56. Medium Modification of Jet Fragmentation inAu+AuCollisions atsNN=200 GeVMeasured in Direct Photon-Hadron Correlations

Author: K. Dehmelt, M. Kurosawa, Jen-Chieh Peng, F. Matathias, L. D'Orazio, Y. J. Mao, S. Kametani, Kensuke Homma, E. Richardson, Saskia Mioduszewski, P. Constantin, S. Miyasaka, Takao Sakaguchi, J. H. Kang, J. S. Haggerty, S. R. Lee, S. Chernichenko, B. Meredith, B. Bassalleck, C. Klein-Boesing, John Hill, Inkyu Park, P. D. Barnes, Jongmin Lee, A. D. Frawley, T. Tabaru, M. Konno, Hongfang Liu, Toru Sugitate, D. E. Fields, S. Huang, C. Silvestre, L. D. Isenhower, B. V. Jacak, B. Lewis, B. Komkov, Xiong Wang, O. Dietzsch, S. H. Aronson, J. Jin, E. M. Takagui, H. Valle, M. McCumber, Dong Jo Kim, W. Holzmann, Y. S. Lai, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, K. Sakashita, Herve Borel, D. Lynch, J. Hanks, Hiroaki Ohnishi, K. B. Lee, François Fleuret, R. A. Soltz, Dipanwita Dutta, Y. Nakamiya, D. Kotov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, Y. Tsuchimoto, C. Gal, Y. Miyachi, Sung Keun Park, Tomoya Tsuji, M. Mendoza, S. N. White, N. N. Ajitanand, A. Taketani, D. S. Jumper, Takahiro Nakamura, Julia Velkovska, R. Tanabe, D. Layton, D. McGlinchey, Y. Ikeda, Maya Hachiya Shimomura, R. S. Hollis, Susumu Oda, A. Durum, J. Egdemir, Zvi Hirsh Citron, Y. I. Makdisi, M. Grosse Perdekamp, S. H. Lim, K. Yamaura, K. O. Eyser, A. K. Purwar, K. Fujiwara, K. Nakano, J. G. Boissevain, R. Belmont, M. Stepanov, G. Baksay, Jason Kamin, M. B. Deaton, A. Sen, Masashi Kaneta, V. L. Rykov, T. Dahms, K. B. Kim, L. Ding, W. E. Sondheim, J. S. Kapustinsky, M. E. Connors, D. Ivanischev, V. Babintsev, S. P. Stoll, V. S. Pantuev, M. Sano, I. Tserruya, Y. L. Yamaguchi, D. Roach, K. M. Kijima, Yu. Efremenko, Tae-Yeon Lee, Martin Purschke, C. A. Aidala, S. Tarafdar, R. Akimoto, C. Pinkenburg, M. Rosati, W. C. Chang, R. Vértesi, K. Boyle, P. A. Rukoyatkin, C. R. Cleven, V. Singh, Y. Tanaka, J. Hamblen, C. Haegemann, Y. Inoue, C. Baumann, B. Sahlmueller, K. Hashimoto, E. Leitner, I. Ravinovich, M. Tomášek, G. S. Kyle, S. S.E. Rosendahl, G. Bunce, Y. J. Kim, M. J. Tannenbaum, H. Torii, Junji Tojo, James Alexander, J. Zimanyi, G. Roche, B. Love, A. Yu. Semenov, Rushan Han, S. Butsyk, Vladimir Samsonov, A. A. Vinogradov, E. Mannel, M. S. Daugherity, C. P. Singh, T. Ichihara, B. M. Johnson, Osamu Jinnouchi, M. Javani, Xingguo Li, Peter Christiansen, D. Winter, D. Yu Peressounko, Matthew G. Reuter, Atsushi Takahara, K. A. Drees, K. Karatsu, Filip Krizek, J. Gosset, Y. Hori, Anne Marie Sickles, Y. Nagata, Takahiro Fusayasu, R. Averbeck, E. C. Aschenauer, A. Churyn, Byung-Sik Hong, A. Bazilevsky, D. Mukhopadhyay, E. Tennant, S. Rembeczki, R. J. Petti, K. Okada, H. W. Van Hecke, J. T. Mitchell, D. Jouan, Philippe Rosnet, M. Bai, T. Kempel, Dong-Hun Kim, Eva Haslum, B. Lenzi, A. Morreale, S. Kaneti, R. Seidl, Vladislav Manko, S. Belikov, S. Baumgart, H. En'yo, M. J. Leitch, Christine Nattrass, T. Todoroki, Jiangyong Jia, C. L. Woody, A. Berdnikov, Y. Goto, A. Isupov, C. Suire, M. Naglis, Alexander Malakhov, Z. Fraenkel, H. J. Moon, F. Staley, L. Baksay, A. Glenn, J. Sziklai, D. Silvermyr, L. S. Zolin, Alexandre Lebedev, A. G. Litvinenko, D. M. Lee, K. Gainey, J. E. Frantz, M. Slunečka, Zhiying You, D. Kotchetkov, R. Bennett, C. A. Ogilvie, Brian Cole, Minghui Liu, Tamas Ferenc Csorgo, S. Afanasiev, A. Ster, W. J. Park, Eunja Kim, K. Watanabe, Christopher Rosen, R. S. Towell, R. K. Choudhury, S. P. Sorensen, D. Kleinjan, A. Yanovich, Dylan Walker, J. P. Wood, P. Tarján, I. Garishvili, Akio Kiyomichi, F. Wei, J. Klatsky, X. Bing, O. Chvala, M. Kawashima, S. Yokkaichi, K. Kiriluk, M. Finger, S. Dairaku, T. K. Hemmick, Seong H. Kim, J. M. Durham, E. H. Kim, Dmitry Blau, B. Azmoun, A. Král, M. J. Kweon, X. Jiang, Yasuo Miake, Masayasu Ishihara, O. Zaudtke, K. Shoji, G. R. Young, C. Vale, B. S. Chang, J. Newby, A. Kozlov, Alexander Milov, M. Heffner, Kyeongpil Lee, R. Seto, I. Nakagawa, R. Luechtenborg, Tomofumi Nagae, J. L. Nagle, P. Castera, Kenneth Francis Read, A. Kiss, M. Soumya, P. W. Stankus, Young-Ki Kim, N. Kurihara, K. Haruna, H. Pei, E. J. Desmond, T. Engelmore, N. Novitzky, J. G. Lajoie, J. Ide, Z. Yasin, T. Hachiya, Henner Buesching, O. Drapier, Frank Ellinghaus, M. Virius, E. T. Atomssa, L. Kochenda, M. Issah, M. Togawa, E. Vazquez-Zambrano, J. Klay, M. K. Lee, J. S. Kang, Steve Edwards, I. Danchev, S. Takagi, M. Oka, E. R. Kinney, Tadaaki Isobe, C. Y. Chi, A. Nederlof, J. Park, D. Hornback, D. P. Morrison, P. Kline, K. S. Lee, K. Das, H. J. Kim, A. Rakotozafindrabe, A. Kravitz, E. P. Hartouni, S. Campbell, M. Gonin, D. Kawall, B. H. Kang, Senta Greene, V. E. Semenov, K. N. Barish, Y. Komatsu, H. Themann, S. Wolin, R. Pak, C. H. Chen, M. Kasai, N. Kamihara, Steven E. Skutnik, K. S. Sim, V. Dzhordzhadze, M. I. Nagy, Y. Kwon, A. Garishvili, X. Gong, Marcus Hohlmann, V. I. Kochetkov, P. L. McGaughey, A. Taranenko, S. Sano, P. Liebing, H. Al-Ta'Ani, A. Sukhanov, K. Kurita, D. Watanabe, L. A. Linden Levy, Tatsuya Chujo, H. Pereira, A. T. Basye, I. V. Sourikova, I. E. Yushmanov, A. Manion, B. E. Norman, R. Armendariz, Y. Morino, M. Chiu, J. Murata, Byoungchoo Park, A. Drees, R. Yang, H. Qu, H. Hiejima, K. S. Joo, S. Taneja, Kazushi Miki, T. Horaguchi, Brajesh K. Singh, S. Bathe, Gerd Joachim Kunde, Charles Maguire, L. Guo, Alexei Khanzadeev, Agneta Oskarsson, Shinichi Masumoto, S. Choi, B. Fadem, E. O'Brien, C. O. Kim, I. Shein, E. Stenlund, J. B. Choi, H. Sakata, J. Kubart, A. V. Kazantsev, M. Vargyas, M. L. Brooks, Hideki Hamagaki, K. Aoki, G. David, K. Imai, K. I. Hahn, Y. Onuki, M. D. Malik, X. He, Y. Berdnikov, S. H. Lee, Y. Akiba, C. McKinney, E. Vznuzdaev, K. Sedgwick, M. Mishra, S. Nagamiya, Dipak Kumar Mishra, Kiyoshi Tanida, O. O. Omiwade, E. Kistenev, L. Tomášek, N. Apadula, P. Mikeš, Alberto Baldisseri, Mihael Makek, Jan Rak, M. Ouchida, N. Means, R. Lacey, Y. Aramaki, V. Peresedov, R. Granier de Cassagnac, A. Adare, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, J. Asai, H. Harada, J. Sun, J. Koster, L. Patel, A. Deshpande, T. V. Moukhanova, S. Batsouli, Shingo Sakai, T. L. Thomas, A. Vossen, H. Masui, A. K. Dubey, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, A. A. Bickley, Jun Kikuchi, A. Veicht, Y. Watanabe, Ryugo S. Hayano, A. Romana, I. Younus, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, S. Esumi, D. Sharma, Rachid Nouicer, A. N. Zelenski, M. Proissl, R. Ichimiya, A. Soldatov, C. Zhang, A. Hadj Henni, Beomkyu Kim, H. Å Gustafsson, Wei Xie, P. Ružička, I. J. Choi, L. Aphecetche, A. Dion, Johannes Peter Wessels, Viktor Riabov, K. V. Dharmawardane, H. Iinuma, A. P.T. Palounek, Aaron Angerami, W. A. Zajc, V. Baublis, A. Denisov, Yuki Watanabe, V. Cianciolo, Y. Tomita, Sergey Fokin, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, D. Isenhower, A. Toia, L. Mašek, H. Kanou, Taku Gunji, H. Gong, J. Seele, F. Kajihara, H. Delagrange, S. Zhou, C. M. Camacho, S. D. Rolnick, Prashant Shukla, S. F. Pate, J. L. Charvet, Ke. Nakamura, T. E. Miller, H. Al-Bataineh, A. Enokizono, P. Chung, J. Imrek, S. Motschwiller, Susumu Sato, W. S. Emam, V. Papavassiliou, Sébastien Gadrat, A. Datta, H. Asano, M. Mitrovski, Takafumi Niida, Bum-Hoon Lee, M. Wysocki, B. Bannier, T. Murakami, Robert F. Hobbs, Debashish Pal, S. Sawada, J. Ying, A. Franz, R. Reynolds, M. Sarsour, Mate Csanad, A. Iordanova, M. Nihashi, David D'Enterria, R. P. Pisani, M. N. Wagner, Y. Fukao, A. Shevel, T. Hester, N. A. Sparks, V-N. Tram, N. Grau, M. Leitgab, Motoi Inaba, R. M. Wright, J. Chiba, and Alice Mignerey
Subjects: Physics, Energy loss, Photon, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, 7. Clean energy, 01 natural sciences, Nuclear physics, Fragmentation (mass spectrometry), 0103 physical sciences, Fragmentation function, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: The jet fragmentation function is measured with direct photon-hadron correlations in p + p and Au + Au collisions at root S-NN = 200 GeV. The P-T of the photon is an excellent approximation to the initial P-T of the jet and the ratio Z(T) = P-T(h)/P-T(gamma) is used as a proxy for the jet fragmentation function. A statistical subtraction is used to extract the direct photon-hadron yields in Au + Au collisions while a photon isolation cut is applied in p + p. I-AA, the ratio of hadron yield opposite the photon in Au + Au to that in p + p, indicates modification of the jet fragmentation function. Suppression, most likely due to energy loss in the medium, is seen at high Z(T). The associated hadron yield at low Z(T) is enhanced at large angles. Such a trend is expected from redistribution of the lost energy into increased production of low-momentum particles.
Published: 2013

57. Third harmonic flow of charged particles in Au+Au collisions atsNN=200 GeV

Author: L. Adamczyk, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, C. D. Anson, D. Arkhipkin, E. Aschenauer, G. S. Averichev, J. Balewski, A. Banerjee, Z. Barnovska, D. R. Beavis, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, A. V. Brandin, S. G. Brovko, E. Bruna, S. Bültmann, I. Bunzarov, T. P. Burton, J. Butterworth, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, Z. Chang, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, P. Chung, J. Chwastowski, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, X. Cui, S. Das, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, R. Derradi de Souza, S. Dhamija, L. Didenko, F. Ding, A. Dion, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, L. E. Dunkelberger, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, L. Eun, O. Evdokimov, R. Fatemi, S. Fazio, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, Y. Fisyak, E. Flores, C. A. Gagliardi, D. R. Gangadharan, D. Garand, F. Geurts, A. Gibson, S. Gliske, Y. N. Gorbunov, O. G. Grebenyuk, D. Grosnick, A. Gupta, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, J. W. Harris, J. P. Hays-Wehle, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, S. Horvat, B. Huang, H. Z. Huang, P. Huck, T. J. Humanic, G. Igo, W. W. Jacobs, C. Jena, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, A. Kesich, D. P. Kikola, J. Kiryluk, I. Kisel, A. Kisiel, V. Kizka, S. R. Klein, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. Koroleva, W. Korsch, L. Kotchenda, P. Kravtsov, K. Krueger, I. Kulakov, L. Kumar, M. A. C. Lamont, J. M. Landgraf, K. D. Landry, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, X. Luo, A. Luszczak, G. L. Ma, Y. G. Ma, D. M. M. D. Madagodagettige Don, D. P. Mahapatra, R. Majka, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, B. Morozov, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, Md. Nasim, T. K. Nayak, J. M. Nelson, L. V. Nogach, J. Novak, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, P. Ostrowski, M. Pachr, B. S. Page, S. K. Pal, Y. X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, W. Peryt, P. Pile, M. Planinic, J. Pluta, N. Poljak, J. Porter, A. M. Poskanzer, C. B. Powell, C. Pruneau, N. K. Pruthi, M. Przybycien, P. R. Pujahari, J. Putschke, H. Qiu, A. Quintero, S. Ramachandran, R. Raniwala, S. Raniwala, R. Redwine, C. K. Riley, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, J. F. Ross, L. Ruan, J. Rusnak, N. R. Sahoo, P. K. Sahu, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, A. M. Schmah, B. Schmidke, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, B. Sharma, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, R. N. Singaraju, M. J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, S. G. Steadman, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, J. Turnau, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, A. Vossen, M. Wada, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, Y. F. Wu, Z. Xiao, W. Xie, K. Xin, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, L. Yi, K. Yip, I-K. Yoo, M. Zawisza, H. Zbroszczyk, J. B. Zhang, S. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, Y. Zoulkarneeva, and M. Zyzak
Subjects: Physics, Nuclear and High Energy Physics, Time projection chamber, 010308 nuclear & particles physics, Plane (geometry), Gaussian, 01 natural sciences, Charged particle, Nuclear physics, symbols.namesake, Pseudorapidity, 0103 physical sciences, symbols, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Anisotropy, Relativistic Heavy Ion Collider, Event (particle physics)
Abstract: We report measurements of the third harmonic coefficient of the azimuthal anisotropy, upsilon(3), known as triangular flow. The analysis is for charged particles in Au + Au collisions at root s(NN) = 200 GeV, based on data from the STAR experiment at the BNL Relativistic Heavy Ion Collider. Two-particle correlations as a function of their pseudorapidity separation are fit with narrow and wide Gaussians. Measurements of triangular flow are extracted from the wide Gaussian, from two-particle cumulants with a pseudorapidity gap, and also from event plane analysis methods with a large pseudorapidity gap between the particles and the event plane. These results are reported as a function of transverse momentum and centrality. A large dependence on the pseudorapidity gap is found. Results are compared with other experiments and model calculations.
Published: 2013

58. Elliptic flow of identified hadrons in Au+Au collisions atsNN=7.7–62.4 GeV

Author: L. Adamczyk, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, C. D. Anson, A. Aparin, D. Arkhipkin, E. Aschenauer, G. S. Averichev, J. Balewski, A. Banerjee, Z. Barnovska, D. R. Beavis, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, P. Bhattarai, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, A. V. Brandin, S. G. Brovko, E. Bruna, S. Bültmann, I. Bunzarov, T. P. Burton, J. Butterworth, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, Z. Chang, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, P. Chung, J. Chwastowski, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, X. Cui, S. Das, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, R. Derradi de Souza, S. Dhamija, B. di Ruzza, L. Didenko, F. Ding, A. Dion, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, L. E. Dunkelberger, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, L. Eun, O. Evdokimov, R. Fatemi, S. Fazio, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, Y. Fisyak, E. Flores, C. A. Gagliardi, D. R. Gangadharan, D. Garand, F. Geurts, A. Gibson, S. Gliske, O. G. Grebenyuk, D. Grosnick, A. Gupta, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, J. W. Harris, J. P. Hays-Wehle, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, S. Horvat, B. Huang, H. Z. Huang, P. Huck, T. J. Humanic, G. Igo, W. W. Jacobs, C. Jena, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, A. Kesich, D. P. Kikola, J. Kiryluk, I. Kisel, A. Kisiel, S. R. Klein, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, W. Korsch, L. Kotchenda, P. Kravtsov, K. Krueger, I. Kulakov, L. Kumar, M. A. C. Lamont, J. M. Landgraf, K. D. Landry, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, X. Luo, A. Luszczak, G. L. Ma, Y. G. Ma, D. M. M. D. Madagodagettige Don, D. P. Mahapatra, R. Majka, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, Md. Nasim, T. K. Nayak, J. M. Nelson, L. V. Nogach, J. Novak, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, M. Pachr, B. S. Page, S. K. Pal, Y. X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, W. Peryt, P. Pile, M. Planinic, J. Pluta, N. Poljak, J. Porter, A. M. Poskanzer, C. B. Powell, C. Pruneau, N. K. Pruthi, M. Przybycien, P. R. Pujahari, J. Putschke, H. Qiu, S. Ramachandran, R. Raniwala, S. Raniwala, R. L. Ray, C. K. Riley, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, J. F. Ross, L. Ruan, J. Rusnak, N. R. Sahoo, P. K. Sahu, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, A. M. Schmah, B. Schmidke, N. Schmitz, T. R. Schuster, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, B. Sharma, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, R. N. Singaraju, M. J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, J. Turnau, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, A. Vossen, M. Wada, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, Y. F. Wu, Z. Xiao, W. Xie, K. Xin, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, L. Yi, K. Yip, I-K. Yoo, M. Zawisza, H. Zbroszczyk, J. B. Zhang, S. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, Y. Zoulkarneeva, and M. Zyzak
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, Elliptic flow, Lambda, 01 natural sciences, Omega, Nuclear physics, Baryon, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: Measurements of the elliptic flow, upsilon(2), of identified hadrons (pi(+/-), K-+/-, K-s(0), p, (p) over bar, phi, Lambda, (Lambda) over bar, Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+)) in Au + Au collisions at root s(NN) = 7.7, 11.5, 19.6, 27, 39, and 62.4 GeV are presented. The measurements were done at midrapidity using the time-projection chamber and the time-of-flight detectors of the Solenoidal Tracker at RHIC experiment during the beam-energy scan program at Relativistic Heavy Ion Collider. A significant difference in the upsilon(2) values for particles and the corresponding antiparticles was observed at all transverse momenta for the first time. The difference increases with decreasing center-of-mass energy, root s(NN) (or increasing baryon chemical potential, mu(B)), and is larger for the baryons as compared to the mesons. This implies that particles and antiparticles are no longer consistent with the universal number-of-constituent quark (NCQ) scaling of upsilon(2) that was observed at root s(NN) = 200 GeV. However, for the selected group of particles (p(+), K+, K-s(0), p, Lambda, Xi(-), Omega(-)) NCQ scaling at (m(T) - m(0))/n(q) > 0.4 GeV/c(2) is not violated within +/- 10%. The upsilon(2) values for f mesons at 7.7 and 11.5 GeV are approximately two standard deviations from the trend defined by the other hadrons at the highest measured p(T) values.
Published: 2013

59. System-size dependence of transverse momentum correlations atsNN=62.4and 200 GeV at the BNL Relativistic Heavy Ion Collider

Author: L. Adamczyk, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, C. D. Anson, A. Aparin, D. Arkhipkin, E. Aschenauer, G. S. Averichev, J. Balewski, A. Banerjee, Z. Barnovska, D. R. Beavis, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, null Bhattarai, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, A. V. Brandin, S. G. Brovko, E. Bruna, S. Bültmann, I. Bunzarov, T. P. Burton, J. Butterworth, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, Z. Chang, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, P. Chung, J. Chwastowski, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, X. Cui, S. Das, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, R. Derradi de Souza, S. Dhamija, B. di Ruzza, L. Didenko, F. Ding, A. Dion, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, L. E. Dunkelberger, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, L. Eun, O. Evdokimov, R. Fatemi, S. Fazio, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, Y. Fisyak, E. Flores, C. A. Gagliardi, D. R. Gangadharan, D. Garand, F. Geurts, A. Gibson, S. Gliske, O. G. Grebenyuk, D. Grosnick, A. Gupta, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, J. W. Harris, J. P. Hays-Wehle, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, S. Horvat, B. Huang, H. Z. Huang, P. Huck, T. J. Humanic, G. Igo, W. W. Jacobs, C. Jena, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, A. Kesich, D. P. Kikola, J. Kiryluk, I. Kisel, A. Kisiel, S. R. Klein, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, W. Korsch, L. Kotchenda, P. Kravtsov, K. Krueger, I. Kulakov, L. Kumar, M. A. C. Lamont, J. M. Landgraf, K. D. Landry, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, X. Luo, A. Luszczak, G. L. Ma, Y. G. Ma, D. M. M. D. Madagodagettige Don, D. P. Mahapatra, R. Majka, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, Md. Nasim, T. K. Nayak, J. M. Nelson, L. V. Nogach, J. Novak, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, M. Pachr, B. S. Page, S. K. Pal, Y. X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, W. Peryt, P. Pile, M. Planinic, J. Pluta, N. Poljak, J. Porter, A. M. Poskanzer, C. B. Powell, C. Pruneau, N. K. Pruthi, M. Przybycien, P. R. Pujahari, J. Putschke, H. Qiu, S. Ramachandran, R. Raniwala, S. Raniwala, R. L. Ray, R. Redwine, C. K. Riley, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, J. F. Ross, L. Ruan, J. Rusnak, N. R. Sahoo, P. K. Sahu, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, A. M. Schmah, B. Schmidke, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, B. Sharma, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, R. N. Singaraju, M. J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, S. G. Steadman, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, J. Turnau, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, A. Vossen, M. Wada, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, Y. F. Wu, Z. Xiao, W. Xie, K. Xin, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, L. Yi, K. Yip, I-K. Yoo, M. Zawisza, H. Zbroszczyk, J. B. Zhang, S. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, Y. Zoulkarneeva, and M. Zyzak
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Star (game theory), Monte Carlo method, Jet (particle physics), 7. Clean energy, 01 natural sciences, Charged particle, Nuclear physics, Pseudorapidity, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Size dependence, Energy (signal processing)
Abstract: We present a study of the average transverse momentum (${p}_{t}$) fluctuations and ${p}_{t}$ correlations for charged particles produced in Cu+Cu collisions at midrapidity for $\sqrt{{s}_{NN}}=$ 62.4 and 200 GeV. These results are compared with those published for Au+Au collisions at the same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the ${p}_{t}$ correlation results have been studied as functions of the collision centralities, the ranges in ${p}_{t}$, the pseudorapidity $\ensuremath{\eta}$, and the azimuthal angle $\ensuremath{\phi}$. The square root of the measured ${p}_{t}$ correlations when scaled by mean ${p}_{t}$ is found to be independent of both colliding beam energy and system size studied. Transport-based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jetlike correlations.
Published: 2013

60. Nuclear modification of ψ', χc, and J/ψ production in d+Au collisions at sqrt[s(NN)]=200 GeV

Author: A, Adare, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, A, Angerami, K, Aoki, N, Apadula, Y, Aramaki, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, G, Baksay, L, Baksay, K N, Barish, B, Bassalleck, A T, Basye, S, Bathe, V, Baublis, C, Baumann, A, Bazilevsky, S, Belikov, R, Belmont, R, Bennett, J H, Bhom, D S, Blau, J S, Bok, K, Boyle, M L, Brooks, H, Buesching, V, Bumazhnov, G, Bunce, S, Butsyk, S, Campbell, A, Caringi, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, J B, Choi, R K, Choudhury, P, Christiansen, T, Chujo, P, Chung, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, Z, Conesa del Valle, M, Connors, M, Csanád, T, Csörgő, T, Dahms, S, Dairaku, I, Danchev, K, Das, A, Datta, G, David, M K, Dayananda, A, Denisov, A, Deshpande, E J, Desmond, K V, Dharmawardane, O, Dietzsch, A, Dion, M, Donadelli, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, D, Dutta, L, D'Orazio, S, Edwards, Y V, Efremenko, F, Ellinghaus, T, Engelmore, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, T, Fusayasu, I, Garishvili, A, Glenn, H, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, G, Grim, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hamblen, R, Han, J, Hanks, E, Haslum, R, Hayano, X, He, M, Heffner, T K, Hemmick, T, Hester, J C, Hill, M, Hohlmann, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, D, Hornback, S, Huang, T, Ichihara, R, Ichimiya, Y, Ikeda, K, Imai, M, Inaba, D, Isenhower, M, Ishihara, M, Issah, D, Ivanischev, Y, Iwanaga, B V, Jacak, J, Jia, X, Jiang, J, Jin, B M, Johnson, T, Jones, K S, Joo, D, Jouan, D S, Jumper, F, Kajihara, J, Kamin, J H, Kang, J, Kapustinsky, K, Karatsu, M, Kasai, D, Kawall, M, Kawashima, A V, Kazantsev, T, Kempel, A, Khanzadeev, K M, Kijima, J, Kikuchi, A, Kim, B I, Kim, D J, Kim, E-J, Kim, Y-J, Kim, E, Kinney, Á, Kiss, E, Kistenev, D, Kleinjan, L, Kochenda, B, Komkov, M, Konno, J, Koster, A, Král, A, Kravitz, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, D M, Lee, J, Lee, K B, Lee, K S, Lee, M J, Leitch, M A L, Leite, X, Li, P, Lichtenwalner, P, Liebing, L A, Linden Levy, T, Liška, H, Liu, M X, Liu, B, Love, D, Lynch, C F, Maguire, Y I, Makdisi, M D, Malik, V I, Manko, E, Mannel, Y, Mao, H, Masui, F, Matathias, M, McCumber, P L, McGaughey, D, McGlinchey, N, Means, B, Meredith, Y, Miake, T, Mibe, A C, Mignerey, K, Miki, A, Milov, J T, Mitchell, A K, Mohanty, H J, Moon, Y, Morino, A, Morreale, D P, Morrison, T V, Moukhanova, T, Murakami, J, Murata, S, Nagamiya, J L, Nagle, M, Naglis, M I, Nagy, I, Nakagawa, Y, Nakamiya, K R, Nakamura, T, Nakamura, K, Nakano, S, Nam, J, Newby, M, Nguyen, M, Nihashi, R, Nouicer, A S, Nyanin, C, Oakley, E, O'Brien, S X, Oda, C A, Ogilvie, M, Oka, K, Okada, Y, Onuki, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, I H, Park, S K, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, D, Perepelitsa, D Yu, Peressounko, R, Petti, C, Pinkenburg, R P, Pisani, M, Proissl, M L, Purschke, H, Qu, J, Rak, I, Ravinovich, K F, Read, S, Rembeczki, K, Reygers, V, Riabov, Y, Riabov, E, Richardson, D, Roach, G, Roche, S D, Rolnick, M, Rosati, C A, Rosen, S S E, Rosendahl, P, Ružička, B, Sahlmueller, N, Saito, T, Sakaguchi, K, Sakashita, V, Samsonov, S, Sano, T, Sato, S, Sawada, K, Sedgwick, J, Seele, R, Seidl, R, Seto, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunečka, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, P W, Stankus, E, Stenlund, S P, Stoll, T, Sugitate, A, Sukhanov, J, Sziklai, E M, Takagui, A, Taketani, R, Tanabe, Y, Tanaka, S, Taneja, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, H, Themann, D, Thomas, T L, Thomas, M, Togawa, A, Toia, L, Tomášek, H, Torii, R S, Towell, I, Tserruya, Y, Tsuchimoto, C, Vale, H, Valle, H W, van Hecke, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, M, Virius, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, F, Wei, R, Wei, J, Wessels, S N, White, D, Winter, C L, Woody, R M, Wright, M, Wysocki, Y L, Yamaguchi, K, Yamaura, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, Z, You, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, and S, Zhou
Abstract: We present results for three charmonia states (ψ', χc, and J/ψ) in d+Au collisions at |y|0.35 and sqrt[s(NN)]=200 GeV. We find that the modification of the ψ' yield relative to that of the J/ψ scales approximately with charged particle multiplicity at midrapidity across p+A, d+Au, and A+A results from the Super Proton Synchrotron and the Relativistic Heavy Ion Collider. In large-impact-parameter collisions we observe a similar suppression for the ψ' and J/ψ, while in small-impact-parameter collisions the more weakly bound ψ' is more strongly suppressed. Owing to the short time spent traversing the Au nucleus, the larger ψ' suppression in central events is not explained by an increase of the nuclear absorption owing to meson formation time effects.
Published: 2013

61. Direct photon production ind+Au collisions atsNN=200GeV

Author: A. Devismes, Y. Onuki, Taku Gunji, H. Gong, J. Seele, Alexander Milov, I. Nakagawa, Jan Rak, T. Engelmore, F. Kajihara, S. V. Afanasiev, L. Aphecetche, Takeo Kawabata, H. Pei, M. C. McCain, R. Lacey, Aaron Angerami, Tadaaki Isobe, O. Drapier, S. S. Adler, G. S. Kyle, H. Delagrange, Frank Ellinghaus, N. Willis, R. Granier de Cassagnac, A. Adare, E. R. Kinney, D. P. Morrison, James Alexander, S. Campbell, W. A. Zajc, Hongfang Liu, D. E. Fields, A. Dion, M. Slunečka, R. Averbeck, P. L. McGaughey, Byung-Sik Hong, V. Baublis, S. Zhou, A. Denisov, V. E. Semenov, J. Zimányi, B. V. Jacak, A. Bazilevsky, V. Cianciolo, Johannes Peter Wessels, Hiroaki Ohnishi, K. B. Lee, H. J. Kim, Y. Fukao, S. D. Rolnick, T. Murakami, Y. Tomita, Philippe Rosnet, Sergey Fokin, C. Silvestre, M. McCumber, A. K. Purwar, Robert F. Hobbs, J. M. Qualls, T. Hester, Alexandre Lebedev, R. Vértesi, A. Hoover, A. Hadj Henni, Dmitry Blau, Ch. Finck, Jason Newby, J. Murata, I. Tserruya, Yu. Efremenko, D. M. Lee, Xiaopeng Zong, E. J. Desmond, Masamichi Ishihara, B. Khachaturov, Beomkyu Kim, Jean-Pierre Cussonneau, M. Togawa, J. Hanks, E. Vazquez-Zambrano, D. Roach, S. Belikov, K. S. Joo, Florian Bauer, K. Watanabe, V. Singh, K. Shoji, A. Rakotozafindrabe, P. Tarján, Marisilvia Donadelli, K. M. Kijima, V. Bumazhnov, M. P. Comets, G. B. Kim, Sean A. Kelly, Minghui Liu, Wei Xie, V. S. Pantuev, M. Kasai, T. Matsumoto, K. Kiriluk, M. Chiu, Ajit Kumar Mohanty, Y. Tsuchimoto, Y. Iwanaga, Maya Hachiya Shimomura, I. E. Yushmanov, Eun-Hee Kim, M. Ouchida, Alexei Khanzadeev, Viktor Veszpremi, T. A. Shibata, C. L. Silva, T. Sato, N. Bruner, N. Means, E. Stenlund, Sung Keun Park, J. B. Choi, M. Heffner, P. W. Stankus, Kenneth Francis Read, S. Sawada, J. Ying, A. Franz, K. Hasuko, B. D. Fox, S. Tarafdar, K. S. Sim, J. Hamblen, A. Yu. Semenov, J. Asai, J. H. Bhom, H. A. Gustafsson, T. Ichihara, N. Apadula, R. Tanabe, D. Layton, N. N. Ajitanand, T. V. Moukhanova, Margaret Harvey, V-N. Tram, N. Grau, O. Dietzsch, B. Komkov, E. T. Atomssa, Y. I. Makdisi, Xingguo Li, Junji Tojo, Y. Kwon, J. Gosset, H. Valle, D. Isenhower, A. Toia, L. Mašek, A. G. Hansen, Shingo Sakai, Hirohiko Sato, Takahiro Nakamura, A. V. Kazantsev, Y. Tanaka, E. Mannel, T. K. Shea, J. P. Sullivan, R. Yang, H. Hiejima, Dipanwita Dutta, B. Espagnon, Joakim Nystrand, Eunja Kim, Eva Haslum, B. Lenzi, K. A. Drees, C. Zhang, German Martinez, Motoi Inaba, P. Ružička, Senta Greene, S. Taneja, K. Okada, Jen-Chieh Peng, W. C. Chang, D. McGlinchey, M. I. Nagy, Julia Velkovska, R. M. Wright, L. Tomášek, M. Rosati, M. Velkovsky, S. P. Sorensen, H. En'yo, D. Watanabe, Susumu Oda, A. T. Basye, M. D. Malik, C. L. Woody, A. Berdnikov, J. L. Charvet, Viktor Riabov, K. Imai, P. Constantin, M. J. Leitch, E. Vznuzdaev, H. Qu, H. J. Moon, F. Staley, L. Baksay, O. Chvala, M. Nihashi, A. Durum, B. Fadem, E. O'Brien, Gary Grim, M. J. Tannenbaum, Rushan Han, S. Esumi, S. Batsouli, K. V. Dharmawardane, A. Caringi, T. E. Miller, K. Karatsu, Inkyu Park, M. Inuzuka, R. A. Soltz, D. S. Brown, K. Yamaura, Z. Conesa del Valle, Hideki Hamagaki, K. Aoki, Seong H. Kim, Charles Maguire, S. Leckey, Takafumi Niida, Anne Marie Sickles, A. A. Vinogradov, Henrik Tydesjö, T. C. Awes, Kyoichiro Ozawa, T. Liška, R. Santo, Jiangyong Jia, Y. Goto, A. Ster, A. Enokizono, J. S. Bok, Jun Kikuchi, J. G. Lajoie, T. Hachiya, David D'Enterria, G. David, M. Grosse Perdekamp, V. V. Ikonnikov, K. I. Hahn, P. Chung, Dong Jo Kim, M. E. Connors, A. Pierson, J. M. Burward-Hoy, Josh Moss, Kiyoshi Tanida, M. K. Dayananda, M. Wysocki, D. Sharma, J. Imrek, D. Kleinjan, R. P. Pisani, D. Mukhopadhyay, R. Ichimiya, S. Rembeczki, S. Butsyk, Vladimir Samsonov, H. Iinuma, I. Otterlund, A. Veicht, A. Datta, E. Kistenev, I. J. Choi, A. Kravitz, J. M. Heuser, M. Gonin, Nikolay Tyurin, D. Bucher, I. V. Sourikova, H. Torii, T. L. Thomas, S. Yokkaichi, A. P.T. Palounek, C. H. Kuberg, G. R. Young, L. Sanfratello, David Olle Rickard Silvermyr, T. Jones, Peter Christiansen, K. Das, P. Lichtenwalner, D. Hornback, Tae-Yeon Lee, V.N. Penev, Martin Purschke, M. A. Volkov, J. Chiba, Alice Mignerey, Ryugo S. Hayano, L. D'Orazio, C. A. Aidala, D. Winter, D. Yu Peressounko, C. M. Camacho, E. P. Hartouni, A. Sukhanov, K. Kurita, H. Pereira, Prashant Shukla, G. C. Mishra, Y. Riabov, Kenta Shigaki, P. J. Kroon, Y. Ikeda, A. Taranenko, M. Nguyen, Kazushi Miki, Takao Sakaguchi, Tamas Ferenc Csorgo, T. Kempel, Dong-Hun Kim, J. G. Boissevain, S. F. Pate, Y. Morino, Masashi Kaneta, A. S. Nyanin, C. Klein-Boesing, Ke. Nakamura, Brajesh K. Singh, Rachid Nouicer, Norio Saito, M. Proissl, Tsutomu Mibe, J. L. Nagle, H. Al-Bataineh, X. R. Wang, K. Katou, A. D. Frawley, R. Pak, S. Huang, S. H. Aronson, C. Pinkenburg, V. Papavassiliou, W. Holzmann, Sébastien Gadrat, D. Kotchetkov, M. Stepanov, G. Roche, S. Kametani, T. Horaguchi, Pàl Hidas, J. H. Kang, J. S. Haggerty, A. Romana, A. Morreale, M. A. L. Leite, Z. Fraenkel, J. L. Drachenberg, Y. S. Lai, R. K. Choudhury, S. C. Johnson, B. Azmoun, Y. J. Mao, A. Král, M. J. Kweon, Y. Le Bornec, M. Oka, K. S. Lee, P. Liebing, C. A. Ogilvie, T. K. Hemmick, R. Belmont, J. S. Kapustinsky, J. M. Durham, V. Babintsev, A. Kiss, Henner Buesching, Steve Edwards, Yasuo Miake, P. Chand, Marcus Hohlmann, L. A. Linden Levy, P. Mikeš, X. Jiang, L. Kochenda, M. Issah, H. Kobayashi, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, K. Sakashita, Vaclav Vrba, Klaus Johannes Reygers, R. Kohara, Jason Kamin, M. Csanad, Rui Wei, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, J.-G. Park, A. Churyn, D. Jouan, Ferenc Deák, N. Kamihara, Aram Kim, R. Armendariz, C. Oakley, A. Drees, Xiao-yan Li, K. O. Eyser, K. Fujiwara, S. W. Nam, Y. L. Yamaguchi, I. Ravinovich, M. Bai, S. S. Ryu, Zhiying You, R. Bennett, H. W. Van Hecke, M. Kawashima, Ahmed Al-Jamel, M. Finger, S. Dairaku, O. Zaudtke, M. Virius, C. H. Chen, Y. Cobigo, J. E. Frantz, Jongmin Lee, Herve Borel, A. Glenn, A. Taketani, D. S. Jumper, V. L. Rykov, T. Dahms, X. He, Y. Aramaki, V. Peresedov, J. Koster, H. Masui, A. K. Dubey, A. A. Bickley, S. Takagi, S. Y. Fung, B. Meredith, K. N. Barish, S. Bathe, F. Matathias, Kensuke Homma, E. Richardson, John Hill, K. Oyama, S. Chernichenko, S. Sano, H. Lim, B. Bassalleck, Toru Sugitate, L. D. Isenhower, T. J. Uam, M. Konno, M. L. Brooks, B. Love, François Fleuret, Marie Germain, A. G. Litvinenko, J. T. Mitchell, Osamu Jinnouchi, F. K. Wohn, A. Kozlov, R. Seto, K. Haruna, Matthew G. Reuter, Takahiro Fusayasu, R. Seidl, Vladislav Manko, I. D. Ojha, Alexander Malakhov, V. Dzhordzhadze, I. Danchev, L. S. Zolin, W. J. Park, Christopher Rosen, P. D. Barnes, A. Yanovich, S. N. White, Deepa Thomas, T. Chujo, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, X. Camard, C. Vale, B. S. Chang, J. Klay, Y. Nakamiya, D. Lynch, G. Baksay, M. T. Bjorndal, B. Sahlmueller, Y. J. Kim, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, D. Kawall, H. Themann, V. I. Kochetkov, Gerd Joachim Kunde, I. Shein, M. Kurosawa, Saskia Mioduszewski, K. Sedgwick, Alberto Baldisseri, Yves Roland Schutz, D. Pal, J. Jin, M. Naglis, E. M. Takagui, C. Baumann, C. P. Singh, B. M. Johnson, R. J. Petti, A. Isupov, C. Suire, J. Sziklai, Brian Cole, R. S. Towell, Susumu Sato, M. Muniruzzaman, I. Garishvili, Akio Kiyomichi, F. Wei, and C. Y. Chi
Subjects: Physics, Nuclear and High Energy Physics, Photon, 010308 nuclear & particles physics, Virtual particle, 01 natural sciences, 7. Clean energy, Photon yield, Nuclear physics, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: Direct photons have been measured in root s(NN) = 200 GeV d + Au collisions at midrapidity. A wide p(T) range is covered by measurements of nearly real virtual photons (1 < p(T) < 6 GeV/c) and real photons (5 < p(T) < 16 GeV/c). The invariant yield of the direct photons in d + Au collisions over the scaled p + p cross section is consistent with unity. Theoretical calculations assuming standard cold-nuclear-matter effects describe the data well for the entire p(T) range. This indicates that the large enhancement of direct photons observed in Au + Au collisions for 1.0 < p(T) < 2.5 GeV/c is attributable to a source other than the initial-state nuclear effects.
Published: 2013

62. Υ(1S+2S+3S)production ind+Au andp+pcollisions atsNN=200GeV and cold-nuclear-matter effects

Author: Y. Tanaka, E. Mannel, H. J. Moon, L. Baksay, Charles Maguire, Kiyoshi Tanida, E. Kistenev, P. Lichtenwalner, Alice Mignerey, J. Sun, L. D'Orazio, Y. Fukao, Atsushi Takahara, K. A. Drees, Takao Sakaguchi, Y. Ikeda, Jen-Chieh Peng, C. Klein-Boesing, J. G. Boissevain, T. Hester, A. D. Frawley, R. Akimoto, Inkyu Park, S. Huang, Xiong Wang, Z. Conesa del Valle, Dong Jo Kim, K. R. Andrews, R. A. Soltz, H. Borel, W. Holzmann, Maya Hachiya Shimomura, R. S. Hollis, X. He, Y. Aramaki, V. Peresedov, M. Grosse Perdekamp, Hongfang Liu, D. E. Fields, B. V. Jacak, Y. I. Makdisi, M. E. Connors, C. Pinkenburg, M. J. Tannenbaum, V-N. Tram, N. Grau, K. Das, E. P. Hartouni, M. McCumber, J. Koster, M. Mendoza, S. N. White, Deepa Thomas, I. Tserruya, Yu. Efremenko, V. Singh, C. A. Ogilvie, H. Torii, A. Kim, D. Mukhopadhyay, E. Tennant, S. Rembeczki, L. Aphecetche, S. Batsouli, Motoi Inaba, H. Masui, A. K. Dubey, Zvi Hirsh Citron, M. Stepanov, G. Roche, A. Yu. Semenov, J. Gosset, Kisung Lee, T. K. Hemmick, M. Naglis, R. M. Wright, M. Sarsour, Mate Csanad, A. Iordanova, J. M. Durham, K. Nakano, T. Jones, Peter Christiansen, Yasuo Miake, A. A. Bickley, A. Veicht, K. N. Barish, J. Hanks, J. L. Charvet, M. Nihashi, W. E. Sondheim, A. Dion, Sung Keun Park, Masayasu Ishihara, D. Winter, D. Yu Peressounko, P. Tarján, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, J. S. Kang, L. Kochenda, M. Issah, David D'Enterria, F. Staley, S. Nam, S. Sano, A. Glenn, A. Enokizono, P. Chung, J. Imrek, M. L. Brooks, K. S. Sim, V. S. Pantuev, V. Dzhordzhadze, A. Datta, B. Meredith, A. Deshpande, S. Yokkaichi, N. N. Ajitanand, Y. Nakamiya, Johannes Peter Wessels, K. Sakashita, D. Kotov, B. Love, Y. Watanabe, J. Hamblen, Eunja Kim, Takahiro Nakamura, I. Younus, Y. Kwon, R. Yang, Alexander Milov, Taku Gunji, H. Gong, J. Seele, F. Kajihara, D. McGlinchey, A. G. Litvinenko, S. Tarafdar, Y. J. Mao, A. Soldatov, D. Kawall, Susumu Oda, Jason Kamin, H. Themann, G. Baksay, S. Taneja, S. Butsyk, John Hill, M. I. Nagy, K. Okada, J. Murata, J. H. Kang, A. Kozlov, H. En'yo, A. Durum, A. Kiss, Senta Greene, Gerd Joachim Kunde, I. Nakagawa, Young-Ki Kim, T. Engelmore, R. Seto, K. Imai, M. Gonin, J. S. Haggerty, S. R. Lee, S. P. Stoll, D. Watanabe, I. Shein, M. J. Leitch, T. Sodre, S. Zhou, K. Karatsu, Eva Haslum, B. Lenzi, A. Baldisseri, A. T. Basye, Jongmin Lee, K. Haruna, S. D. Rolnick, J. Ben-Benjamin, Y. Hori, Anne Marie Sickles, I. Danchev, B. Fadem, E. O'Brien, O. Dietzsch, S. Afanasiev, Henner Buesching, Toru Sugitate, Steve Edwards, B. Lewis, K. Sedgwick, Minghui Liu, Catherine Micaela Silvestre, K. Yamaura, S. S.E. Rosendahl, G. Bunce, E. T. Atomssa, B. Sahlmueller, H. Valle, O. Drapier, A. Ster, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, K. Utsunomiya, M. D. Malik, E. Vznuzdaev, X. Gong, Marcus Hohlmann, J. Newby, D. Lynch, Y. J. Kim, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, Dipanwita Dutta, A. Churyn, M. Heffner, D. Jouan, S. Campbell, H. A. Gustafsson, B. H. Kang, V. E. Semenov, A. Sukhanov, K. Kurita, A. Taketani, Kenneth Francis Read, L. A. Linden Levy, P. Mikeš, B. Azmoun, A. Král, F. Matathias, D. S. Jumper, M. J. Kweon, D. Hornback, Kensuke Homma, R. S. Towell, C. Zhang, H. Pereira, Y. Morino, C. Gal, G. R. Young, D. Isenhower, A. Toia, E. Richardson, Julia Velkovska, R. Pak, N. Kamihara, S. Bathe, L. Mašek, H. Al-Ta'Ani, Tatsuya Chujo, P. Ružička, V. L. Rykov, T. Dahms, P. Constantin, I. Garishvili, S. Chernichenko, F. Wei, A. Taranenko, Agneta Oskarsson, François Fleuret, A. V. Kazantsev, Kazushi Miki, T. Horaguchi, M. Rosati, M. Ouchida, Viktor Riabov, Y. Berdnikov, S. H. Lee, Y. Akiba, T. Ichihara, B. Bassalleck, Y. S. Lai, I. Ravinovich, N. Means, Y. Onuki, C. McKinney, M. Mishra, S. Nagamiya, J. Asai, Brajesh K. Singh, Byoungchoo Park, A. Hadj Henni, Vaclav Vrba, C. Harper, M. Konno, Takahiro Fusayasu, Aaron Angerami, K. B. Lee, Klaus Johannes Reygers, M. Oka, Rui Wei, Shingo Sakai, C. Oakley, M. Bai, A. Drees, P. Kline, Alexander Malakhov, C. L. Woody, A. Berdnikov, K. O. Eyser, A. K. Purwar, K. Fujiwara, Beomkyu Kim, E. C. Aschenauer, L. Tomášek, Wei Xie, T. Kempel, Dong-Hun Kim, Jan Rak, D. Silvermyr, Y. L. Yamaguchi, Y. Miyachi, A. A. Vinogradov, J. T. Mitchell, W. A. Zajc, A. Caringi, S. Kaneti, P. Liebing, C. Y. Chi, R. Lacey, L. S. Zolin, Tae-Yeon Lee, V. Baublis, A. Denisov, Yuki Watanabe, V. Cianciolo, W. J. Park, Christopher Rosen, Jiangyong Jia, Martin Purschke, Y. Goto, P. D. Barnes, R. Seidl, Zhiying You, C. A. Aidala, R. Granier de Cassagnac, Y. Tomita, R. Bennett, M. Kawashima, Vladislav Manko, A. Yanovich, L. Patel, A. Adare, C. Baumann, S. Kametani, M. Slunečka, I. V. Sourikova, H. W. Van Hecke, M. Finger, S. Dairaku, T. L. Thomas, C. P. Singh, Sergey Fokin, D. Broxmeyer, I. J. Choi, D. Roach, K. M. Kijima, T. C. Awes, B. M. Johnson, S. Belikov, R. J. Petti, Kyoichiro Ozawa, T. Liška, Ryugo S. Hayano, H. Qu, O. Zaudtke, A. Morreale, J. S. Bok, Jun Kikuchi, A. Isupov, C. Suire, Y. Riabov, Kenta Shigaki, Z. Fraenkel, M. Nguyen, Tadaaki Isobe, M. Virius, J. Sziklai, Gary Grim, Hideki Hamagaki, K. Aoki, G. David, A. S. Nyanin, K. I. Hahn, K. Hashimoto, K. V. Dharmawardane, R. K. Choudhury, Brian Cole, C. Vale, M. Kurosawa, K. S. Joo, Rachid Nouicer, A. N. Zelenski, M. Proissl, Marisilvia Donadelli, B. S. Chang, V. Bumazhnov, Xingguo Li, P. L. McGaughey, J. Klay, K. Watanabe, C. H. Chen, M. Chiu, N. Apadula, A. Manion, M. Savastio, R. Tanabe, H. Iinuma, D. Layton, K. Shoji, A. Vossen, S. P. Sorensen, A. P.T. Palounek, J. Jin, S. Esumi, W. C. Chang, O. Chvala, E. M. Takagui, D. Sharma, R. Ichimiya, Rushan Han, Seong H. Kim, Vladimir Samsonov, J. G. Lajoie, A. Kravitz, Tamas Ferenc Csorgo, J. L. Nagle, D. John, P. Castera, D. Kleinjan, Eric Appelt, B. Komkov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, H. H. Shim, S. H. Lim, R. Belmont, J. S. Kapustinsky, V. Babintsev, M. Tomášek, G. S. Kyle, James Alexander, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Philippe Rosnet, Alexandre Lebedev, R. P. Pisani, D. M. Lee, K. Kiriluk, T. Murakami, E. H. Kim, X. Jiang, L. Guo, P. W. Stankus, Alexei Khanzadeev, E. Stenlund, J. B. Choi, S. Sawada, J. Ying, A. Franz, J. H. Bhom, T. V. Moukhanova, R. Vértesi, Takafumi Niida, J. E. Frantz, J. S. Yoo, M. K. Dayananda, Dmitry Blau, M. Wysocki, B. Bannier, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, C. M. Camacho, Prashant Shukla, J. Park, A. Rakotozafindrabe, S. F. Pate, M. Kasai, Y. Tsuchimoto, Ke. Nakamura, H. Al-Bataineh, R. Armendariz, Y. Iwanaga, S. Motschwiller, I. E. Yushmanov, V. Papavassiliou, and H. Pei
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, High energy, Deuterium, High Energy Physics::Experiment, Rapidity, Atomic physics, Nuclear Experiment, Relativistic Heavy Ion Collider, Nuclear matter, Lower energy
Abstract: The three gamma states, gamma (1S + 2S + 3S), are measured in d + Au and p + p collisions at root s(NN) = 200 GeV and rapidities 1.2 < vertical bar y vertical bar < 2.2 by the PHENIX experiment at the Relativistic Heavy Ion Collider. Cross sections for the inclusive gamma (1S + 2S + 3S) production are obtained. The inclusive yields per binary collision for d + Au collisions relative to those in p + p collisions (R-dAu) are found to be 0.62 +/- 0.26 (stat) +/- 0.13 (syst) in the gold-going direction and 0.91 +/- 0.33 (stat) +/- 0.16 (syst) in the deuteron-going direction. The measured results are compared to a nuclear-shadowing model, EPS09 [Eskola et al., J. High Energy Phys. 04 (2009) 065], combined with a final-state breakup cross section, sigma(br), and compared to lower energy p + A results. We also compare the results to the PHENIX J/psi results [Adare et al., Phys. Rev. Lett. 107, 142301 (2011)]. The rapidity dependence of the observed gamma suppression is consistent with lower energy p + A measurements. DOI: 10.1103/PhysRevC.87.044909
Published: 2013

63. Transverse-momentum dependence of theJ/ψnuclear modification ind+Au collisions atsNN=200GeV

Author: K. Fujiwara, Y. Nakamiya, Y. L. Yamaguchi, Marisilvia Donadelli, V. Bumazhnov, G. Baksay, T. Murakami, R. Tanabe, B. Sahlmueller, Y. J. Kim, H. W. Van Hecke, J. T. Mitchell, S. Sawada, O. Dietzsch, Rushan Han, Alice Mignerey, L. D'Orazio, H. A. Gustafsson, J. Ying, A. Franz, E. T. Atomssa, H. Valle, R. Seidl, Dipanwita Dutta, K. Karatsu, Takao Sakaguchi, Vladislav Manko, A. Enokizono, M. Chiu, P. L. McGaughey, P. Chung, Julia Velkovska, Y. Tanaka, S. Bathe, C. A. Ogilvie, E. Mannel, Agneta Oskarsson, P. Ružička, Y. Berdnikov, Y. Akiba, S. Nagamiya, M. Slunečka, A. D. Frawley, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, Anne Marie Sickles, A. Kiss, T. K. Hemmick, M. Rosati, K. A. Drees, A. V. Kazantsev, J. M. Durham, Yasuo Miake, Y. J. Mao, Henner Buesching, Steve Edwards, Marcus Hohlmann, Prashant Shukla, S. Huang, Viktor Riabov, L. A. Linden Levy, Beomkyu Kim, A. Datta, T. L. Thomas, T. Ichihara, X. He, I. Ravinovich, S. F. Pate, Ke. Nakamura, H. J. Moon, Vladimir Samsonov, L. Tomášek, Gary Grim, K. V. Dharmawardane, J. H. Kang, J. S. Haggerty, S. P. Sorensen, Alexei Khanzadeev, H. Al-Bataineh, S. Tarafdar, L. Baksay, Takahiro Fusayasu, V. S. Pantuev, Senta Greene, Y. Aramaki, Jiangyong Jia, Y. Goto, E. Stenlund, V. Peresedov, S. Belikov, Alexander Malakhov, W. Holzmann, Robert Vertesi, L. Kochenda, M. Issah, A. T. Basye, J. B. Choi, J. Hamblen, J. Koster, G. R. Young, O. Chvala, Eva Haslum, T. C. Awes, Kyoichiro Ozawa, T. Liška, X. Jiang, D. Kleinjan, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, Hongfang Liu, D. E. Fields, Maya Hachiya Shimomura, Y. I. Makdisi, V. Papavassiliou, B. Fadem, E. O'Brien, D. Silvermyr, B. V. Jacak, J. S. Bok, Jun Kikuchi, H. Masui, Ryugo S. Hayano, Y. Riabov, J. G. Lajoie, Kenta Shigaki, Tamas Ferenc Csorgo, K. Okada, L. S. Zolin, W. J. Park, D. Isenhower, S. Afanasiev, A. Toia, R. A. Soltz, M. Bai, M. McCumber, K. N. Barish, J. L. Nagle, I. J. Choi, A. Kravitz, S. Nam, H. En'yo, Christopher Rosen, M. Nguyen, Y. S. Lai, M. J. Leitch, M. J. Tannenbaum, C. Vale, M. Gonin, K. Das, S. Sano, A. Yanovich, J. Newby, Aaron Angerami, Y. Ikeda, B. Azmoun, A. Král, H. Torii, M. K. Dayananda, A. Deshpande, A. S. Nyanin, A. Sukhanov, K. Kurita, A. Kim, S. Rembeczki, W. A. Zajc, M. Wysocki, M. L. Brooks, H. Pereira, J. Hanks, Taku Gunji, H. Gong, J. Seele, Minghui Liu, M. Grosse Perdekamp, Y. Morino, B. Love, Rachid Nouicer, M. Proissl, J. H. Bhom, Y. J. Kwon, F. Kajihara, M. E. Connors, B. Meredith, V. Baublis, A. Denisov, V. Cianciolo, F. Matathias, Kensuke Homma, C. Pinkenburg, A. G. Litvinenko, Sung Keun Park, M. Heffner, D. Hornback, Kenneth Francis Read, E. Richardson, Y. Watanabe, K. S. Sim, K. B. Lee, N. N. Ajitanand, S. Butsyk, John Hill, Sergey Fokin, M. Oka, T. V. Moukhanova, R. Seto, G. Roche, S. Zhou, B. Bassalleck, Dmitry Blau, K. S. Lee, A. Taranenko, I. Danchev, M. Konno, R. Yang, S. D. Rolnick, Toru Sugitate, Takahiro Nakamura, Kazushi Miki, K. Tanida, D. Roach, K. M. Kijima, M. Ouchida, S. Taneja, I. Younus, Brajesh K. Singh, D. McGlinchey, T. Jones, Peter Christiansen, E. J. Desmond, P. Liebing, Susumu Oda, N. Means, K. Imai, K. S. Joo, Xingguo Li, D. Winter, D. Yu Peressounko, A. Durum, Y. Onuki, Zhiying You, E. Vazquez-Zambrano, Catherine Micaela Silvestre, K. Yamaura, Jan Rak, S. Yokkaichi, R. Lacey, R. Bennett, R. Granier de Cassagnac, A. Adare, N. Apadula, M. Kawashima, D. Kawall, François Fleuret, S. Esumi, D. Sharma, R. Ichimiya, M. Finger, S. N. White, M. Kasai, C. Baumann, Y. Tsuchimoto, C. P. Singh, C. L. Woody, A. Berdnikov, Martin Purschke, C. A. Aidala, H. Themann, Deepa Thomas, B. Komkov, H. Qu, Y. Iwanaga, Norio Saito, Tsutomu Mibe, M. A. L. Leite, Zvi Hirsh Citron, Jongmin Lee, K. Nakano, B. M. Johnson, I. E. Yushmanov, A. Caringi, R. Belmont, J. S. Kapustinsky, V. Babintsev, W. E. Sondheim, R. J. Petti, A. Isupov, G. S. Kyle, James Alexander, D. Ivanischev, A. Morreale, J. Sziklai, K. Boyle, P. A. Rukoyatkin, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Brian Cole, Z. Fraenkel, R. S. Towell, Alexandre Lebedev, I. Garishvili, F. Wei, J. Murata, D. M. Lee, R. K. Choudhury, I. V. Sourikova, C. Y. Chi, D. Lynch, Gerd Joachim Kunde, Hideki Hamagaki, K. Aoki, M. Kurosawa, J. E. Frantz, I. Shein, G. David, K. I. Hahn, A. Taketani, Mate Csanad, M. Nihashi, R. P. Pisani, D. S. Jumper, K. Sedgwick, Y. Fukao, T. Hester, N. Grau, J. Jin, E. M. Takagui, Motoi Inaba, R. M. Wright, T. Dahms, S. Dairaku, K. Watanabe, M. Naglis, H. Pei, Masayasu Ishihara, M. Virius, Manabu Togawa, K. Shoji, K. Sakashita, C. H. Chen, T. Horaguchi, Jason Kamin, P. W. Stankus, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, Charles Maguire, D. Jouan, R. Pak, D. Watanabe, M. D. Malik, E. Vznuzdaev, E. Kistenev, P. Lichtenwalner, C. Oakley, A. Drees, A. Dion, M. I. Nagy, Johannes Peter Wessels, T. Kempel, I. Tserruya, Yu. Efremenko, V. Singh, A. Glenn, Eunja Kim, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, Tatsuya Chujo, Jen-Chieh Peng, Inkyu Park, Xiong Wang, Z. Conesa del Valle, Dong Jo Kim, and A. Veicht
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, 7. Clean energy, 01 natural sciences, Interpretation (model theory), Nuclear physics, Deuterium, 0103 physical sciences, Transverse momentum, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: We present measured J/psi production rates in d + Au collisions at root s(NN) = 200 GeV over broad ranges of transverse momentum (p(T) = 0-14 GeV/c) and rapidity (-2.2 1) for p(T) > 2 GeV/c. The observed enhancement at negative rapidity has implications for the interpretation of the observed modification in heavy-ion collisions at high p(T). DOI: 10.1103/PhysRevC.87.034904
Published: 2013

64. Experimental studies of di-jets in Au plus Au collisions using angular correlations with respect to back-to-back leading hadrons

Author: L. Adamczyk, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, C. D. Anson, D. Arkhipkin, E. Aschenauer, G. S. Averichev, J. Balewski, A. Banerjee, Z. Barnovska, D. R. Beavis, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, A. V. Brandin, S. G. Brovko, E. Bruna, S. Bültmann, I. Bunzarov, T. P. Burton, J. Butterworth, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, Z. Chang, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, P. Chung, J. Chwastowski, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, X. Cui, S. Das, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, R. Derradi de Souza, S. Dhamija, L. Didenko, F. Ding, A. Dion, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, L. E. Dunkelberger, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, L. Eun, O. Evdokimov, R. Fatemi, S. Fazio, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, Y. Fisyak, C. A. Gagliardi, D. R. Gangadharan, F. Geurts, A. Gibson, S. Gliske, Y. N. Gorbunov, O. G. Grebenyuk, D. Grosnick, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, J. W. Harris, J. P. Hays-Wehle, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, S. Horvat, B. Huang, H. Z. Huang, P. Huck, T. J. Humanic, L. Huo, G. Igo, W. W. Jacobs, C. Jena, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, A. Kesich, D. P. Kikola, J. Kiryluk, I. Kisel, A. Kisiel, V. Kizka, S. R. Klein, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. Koroleva, W. Korsch, L. Kotchenda, P. Kravtsov, K. Krueger, I. Kulakov, L. Kumar, M. A. C. Lamont, J. M. Landgraf, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, L. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, X. Luo, A. Luszczak, G. L. Ma, Y. G. Ma, D. M. M. D. Madagodagettige Don, D. P. Mahapatra, R. Majka, O. I. Mall, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, B. Morozov, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, Md. Nasim, T. K. Nayak, J. M. Nelson, L. V. Nogach, J. Novak, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, P. Ostrowski, M. Pachr, B. S. Page, S. K. Pal, Y. X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, W. Peryt, P. Pile, M. Planinic, J. Pluta, D. Plyku, N. Poljak, J. Porter, A. M. Poskanzer, C. B. Powell, C. Pruneau, N. K. Pruthi, M. Przybycien, P. R. Pujahari, J. Putschke, H. Qiu, R. Raniwala, S. Raniwala, R. L. Ray, R. Redwine, R. Reed, C. K. Riley, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, J. F. Ross, L. Ruan, J. Rusnak, N. R. Sahoo, P. K. Sahu, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, A. M. Schmah, B. Schmidke, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, B. Sharma, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, R. N. Singaraju, M. J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, S. G. Steadman, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, D. Thein, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, J. Turnau, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, A. Vossen, M. Wada, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, W. Witzke, Y. F. Wu, Z. Xiao, W. Xie, K. Xin, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, Y. Yi, K. Yip, I-K. Yoo, M. Zawisza, H. Zbroszczyk, J. B. Zhang, S. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, Y. Zoulkarneeva, and M. Zyzak
Subjects: Physics, AuAu, Nuclear and High Energy Physics, Particle physics, STAR, 010308 nuclear & particles physics, media_common.quotation_subject, Hadron, Di-jets, 01 natural sciences, Asymmetry, NATURAL SCIENCES. Physics, Nuclear physics, PRIRODNE ZNANOSTI. Fizika, hadrons, Deuterium, Angular correlation, 0103 physical sciences, Transverse momentum, High Energy Physics::Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Nuclear Experiment, media_common
Abstract: Jet-medium interactions are studied via a multihadron correlation technique ( called "2 + 1"), where a pair of back-to-back hadron triggers with large transverse momentum is used as a proxy for a di-jet. This work extends the previous analysis for nearly symmetric trigger pairs with the highest momentum threshold of trigger hadron of 5 GeV/c with the new calorimeter-based triggers with energy thresholds of up to 10 GeV and above. The distributions of associated hadrons are studied in terms of correlation shapes and per-trigger yields on each trigger side. In contrast with di-hadron correlation results with single triggers, the associated hadron distributions for back-to-back triggers from central Au + Au data at root S-NN = 200 GeV show no strong modifications compared to d + Au data at the same energy. An imbalance in the total transverse momentum between hadrons attributed to the near-side and away-side of jetlike peaks is observed. The relative imbalance in the Au + Au measurement with respect to d + Au reference is found to increase with the asymmetry of the trigger pair, consistent with the expectation from medium-induced energy-loss effects. In addition, this relative total transverse momentum imbalance is found to decrease for softer associated hadrons. Such evolution indicates that the energy missing at higher associated momenta is converted into softer hadrons. DOI:10.1103/PhysRevC.87.044903
Published: 2013

65. Measurement of J/ψ azimuthal anisotropy in Au+Au collisions at sqrt[s(NN)]=200 GeV

Author: L, Adamczyk, J K, Adkins, G, Agakishiev, M M, Aggarwal, Z, Ahammed, I, Alekseev, J, Alford, C D, Anson, A, Aparin, D, Arkhipkin, E, Aschenauer, G S, Averichev, J, Balewski, A, Banerjee, Z, Barnovska, D R, Beavis, R, Bellwied, M J, Betancourt, R R, Betts, A, Bhasin, A K, Bhati, P, Bhattarai, H, Bichsel, J, Bielcik, J, Bielcikova, L C, Bland, I G, Bordyuzhin, W, Borowski, J, Bouchet, A V, Brandin, S G, Brovko, E, Bruna, S, Bültmann, I, Bunzarov, T P, Burton, J, Butterworth, X Z, Cai, H, Caines, M, Calderón de la Barca Sánchez, D, Cebra, R, Cendejas, M C, Cervantes, P, Chaloupka, Z, Chang, S, Chattopadhyay, H F, Chen, J H, Chen, J Y, Chen, L, Chen, J, Cheng, M, Cherney, A, Chikanian, W, Christie, P, Chung, J, Chwastowski, M J M, Codrington, R, Corliss, J G, Cramer, H J, Crawford, X, Cui, S, Das, A, Davila Leyva, L C, De Silva, R R, Debbe, T G, Dedovich, J, Deng, R, Derradi de Souza, S, Dhamija, B, di Ruzza, L, Didenko, F, Ding, A, Dion, P, Djawotho, X, Dong, J L, Drachenberg, J E, Draper, C M, Du, L E, Dunkelberger, J C, Dunlop, L G, Efimov, M, Elnimr, J, Engelage, G, Eppley, L, Eun, O, Evdokimov, R, Fatemi, S, Fazio, J, Fedorisin, R G, Fersch, P, Filip, E, Finch, Y, Fisyak, E, Flores, C A, Gagliardi, D R, Gangadharan, D, Garand, F, Geurts, A, Gibson, S, Gliske, O G, Grebenyuk, D, Grosnick, A, Gupta, S, Gupta, W, Guryn, B, Haag, O, Hajkova, A, Hamed, L-X, Han, J W, Harris, J P, Hays-Wehle, S, Heppelmann, A, Hirsch, G W, Hoffmann, D J, Hofman, S, Horvat, B, Huang, H Z, Huang, P, Huck, T J, Humanic, G, Igo, W W, Jacobs, C, Jena, E G, Judd, S, Kabana, K, Kang, J, Kapitan, K, Kauder, H W, Ke, D, Keane, A, Kechechyan, A, Kesich, D P, Kikola, J, Kiryluk, I, Kisel, A, Kisiel, S R, Klein, D D, Koetke, T, Kollegger, J, Konzer, I, Koralt, W, Korsch, L, Kotchenda, P, Kravtsov, K, Krueger, I, Kulakov, L, Kumar, M A C, Lamont, J M, Landgraf, K D, Landry, S, Lapointe, J, Lauret, A, Lebedev, R, Lednicky, J H, Lee, W, Leight, M J, LeVine, C, Li, W, Li, X, Li, Y, Li, Z M, Li, L M, Lima, M A, Lisa, F, Liu, T, Ljubicic, W J, Llope, R S, Longacre, Y, Lu, X, Luo, A, Luszczak, G L, Ma, Y G, Ma, D M M D, Madagodagettige Don, D P, Mahapatra, R, Majka, S, Margetis, C, Markert, H, Masui, H S, Matis, D, McDonald, T S, McShane, S, Mioduszewski, M K, Mitrovski, Y, Mohammed, B, Mohanty, M M, Mondal, M G, Munhoz, M K, Mustafa, M, Naglis, B K, Nandi, Md, Nasim, T K, Nayak, J M, Nelson, L V, Nogach, J, Novak, G, Odyniec, A, Ogawa, K, Oh, A, Ohlson, V, Okorokov, E W, Oldag, R A N, Oliveira, D, Olson, M, Pachr, B S, Page, S K, Pal, Y X, Pan, Y, Pandit, Y, Panebratsev, T, Pawlak, B, Pawlik, H, Pei, C, Perkins, W, Peryt, P, Pile, M, Planinic, J, Pluta, N, Poljak, J, Porter, A M, Poskanzer, C B, Powell, C, Pruneau, N K, Pruthi, M, Przybycien, P R, Pujahari, J, Putschke, H, Qiu, S, Ramachandran, R, Raniwala, S, Raniwala, R L, Ray, C K, Riley, H G, Ritter, J B, Roberts, O V, Rogachevskiy, J L, Romero, J F, Ross, L, Ruan, J, Rusnak, N R, Sahoo, P K, Sahu, I, Sakrejda, S, Salur, A, Sandacz, J, Sandweiss, E, Sangaline, A, Sarkar, J, Schambach, R P, Scharenberg, A M, Schmah, B, Schmidke, N, Schmitz, T R, Schuster, J, Seger, P, Seyboth, N, Shah, E, Shahaliev, M, Shao, B, Sharma, M, Sharma, S S, Shi, Q Y, Shou, E P, Sichtermann, R N, Singaraju, M J, Skoby, D, Smirnov, N, Smirnov, D, Solanki, P, Sorensen, U G, Desouza, H M, Spinka, B, Srivastava, T D S, Stanislaus, J R, Stevens, R, Stock, M, Strikhanov, B, Stringfellow, A A P, Suaide, M C, Suarez, M, Sumbera, X M, Sun, Y, Sun, Z, Sun, B, Surrow, D N, Svirida, T J M, Symons, A, Szanto de Toledo, J, Takahashi, A H, Tang, Z, Tang, L H, Tarini, T, Tarnowsky, J H, Thomas, J, Tian, A R, Timmins, D, Tlusty, M, Tokarev, S, Trentalange, R E, Tribble, P, Tribedy, B A, Trzeciak, O D, Tsai, J, Turnau, T, Ullrich, D G, Underwood, G, Van Buren, G, van Nieuwenhuizen, J A, Vanfossen, R, Varma, G M S, Vasconcelos, F, Videbæk, Y P, Viyogi, S, Vokal, S A, Voloshin, A, Vossen, M, Wada, F, Wang, G, Wang, H, Wang, J S, Wang, Q, Wang, X L, Wang, Y, Wang, G, Webb, J C, Webb, G D, Westfall, C, Whitten, H, Wieman, S W, Wissink, R, Witt, Y F, Wu, Z, Xiao, W, Xie, K, Xin, H, Xu, N, Xu, Q H, Xu, W, Xu, Y, Xu, Z, Xu, L, Xue, Y, Yang, P, Yepes, L, Yi, K, Yip, I-K, Yoo, M, Zawisza, H, Zbroszczyk, J B, Zhang, S, Zhang, X P, Zhang, Y, Zhang, Z P, Zhang, F, Zhao, J, Zhao, C, Zhong, X, Zhu, Y H, Zhu, Y, Zoulkarneeva, and M, Zyzak
Subjects: Anisotropy, Quantum Theory, Gold, Elementary Particles
Abstract: The measurement of J/ψ azimuthal anisotropy is presented as a function of transverse momentum for different centralities in Au+Au collisions at sqrt[s(NN)]=200 GeV. The measured J/ψ elliptic flow is consistent with zero within errors for transverse momentum between 2 and 10 GeV/c. Our measurement suggests that J/ψ particles with relatively large transverse momenta are not dominantly produced by coalescence from thermalized charm quarks, when comparing to model calculations.
Published: 2012

66. Anomalous centrality evolution of two-particle angular correlations from Au-Au collisions atsNN=62and 200 GeV

Author: G. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, C. D. Anson, D. Arkhipkin, G. S. Averichev, J. Balewski, D. R. Beavis, N. K. Behera, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, E. Braidot, A. V. Brandin, S. G. Brovko, E. Bruna, S. Bueltmann, I. Bunzarov, T. P. Burton, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, P. Chung, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, X. Cui, M. S. Daugherity, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, A. A. Derevschikov, R. Derradi de Souza, L. Didenko, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, M. Estienne, L. Eun, O. Evdokimov, R. Fatemi, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, V. Fine, Y. Fisyak, C. A. Gagliardi, D. R. Gangadharan, F. Geurts, P. Ghosh, Y. N. Gorbunov, A. Gordon, O. G. Grebenyuk, D. Grosnick, A. Gupta, S. Gupta, B. Haag, O. Hajkova, A. Hamed, L.-X. Han, J. P. Hays-Wehle, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, B. Huang, H. Z. Huang, T. J. Humanic, L. Huo, G. Igo, W. W. Jacobs, C. Jena, J. Joseph, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, D. Kettler, D. P. Kikola, J. Kiryluk, A. Kisiel, V. Kizka, S. R. Klein, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. Koroleva, W. Korsch, L. Kotchenda, P. Kravtsov, K. Krueger, L. Kumar, M. A. C. Lamont, J. M. Landgraf, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, L. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, E. V. Lukashov, X. Luo, G. L. Ma, Y. G. Ma, D. P. Mahapatra, R. Majka, O. I. Mall, R. Manweiler, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, A. Meschanin, R. Milner, N. G. Minaev, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, B. Morozov, D. A. Morozov, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, T. K. Nayak, L. V. Nogach, S. B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, M. Pachr, B. S. Page, S. K. Pal, Y. Pandit, Y. Panebratsev, T. Pawlak, H. Pei, T. Peitzmann, C. Perkins, W. Peryt, P. Pile, M. Planinic, J. Pluta, D. Plyku, N. Poljak, J. Porter, C. B. Powell, D. Prindle, C. Pruneau, N. K. Pruthi, P. R. Pujahari, J. Putschke, H. Qiu, R. Raniwala, S. Raniwala, R. L. Ray, R. Redwine, R. Reed, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, L. Ruan, J. Rusnak, N. R. Sahoo, I. Sakrejda, S. Salur, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, J. Schaub, A. M. Schmah, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, I. Selyuzhenkov, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, F. Simon, R. N. Singaraju, M. J. Skoby, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, S. G. Steadman, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, D. Thein, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, T. A. Trainor, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, A. N. Vasiliev, F. Videbæk, Y. P. Viyogi, S. Vokal, M. Wada, M. Walker, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, W. Witzke, Y. F. Wu, Z. Xiao, W. Xie, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, K. Yip, I.-K. Yoo, M. Zawisza, H. Zbroszczyk, W. Zhan, J. B. Zhang, S. Zhang, W. M. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, and Y. Zoulkarneeva
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Scattering, Elliptic flow, Perturbative QCD, Parton, 01 natural sciences, Charged particle, Nuclear physics, Pseudorapidity, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Jet quenching, QCD matter
Abstract: We present two-dimensional (2D) two-particle angular correlations measured with the STAR detector on relative pseudorapidity η and azimuth ϕ for charged particles from Au-Au collisions at √sNN=62 and 200 GeV with transverse momentum pt≥0.15 GeV/c, |η|≤1, and 2π in azimuth. Observed correlations include a same-side (relative azimuth
Published: 2012

67. Cold-Nuclear-Matter Effects on Heavy-Quark Production ind+AuCollisions atsNN=200 GeV

Author: H. Themann, M. Grosse Perdekamp, T. Hester, M. E. Connors, Sung Keun Park, S. Dairaku, N. N. Ajitanand, K. A. Drees, Marisilvia Donadelli, Takahiro Nakamura, T. Murakami, K. Tanida, Gerd Joachim Kunde, I. Shein, N. Grau, V. Bumazhnov, Charles Maguire, T. Jones, Peter Christiansen, M. Virius, Susumu Oda, Manabu Togawa, H. Pei, K. Sedgwick, Y. Onuki, S. P. Sorensen, E. Kistenev, D. Winter, D. Yu Peressounko, P. Lichtenwalner, M. Rosati, Jan Rak, A. Durum, Motoi Inaba, R. Lacey, C. H. Chen, Alexander Milov, I. Nakagawa, O. Chvala, R. Tanabe, Y. Tanaka, R. Granier de Cassagnac, A. Adare, E. Mannel, Catherine Micaela Silvestre, K. Yamaura, R. M. Wright, T. Engelmore, A. Deshpande, K. Das, Y. Ikeda, T. L. Thomas, H. A. Gustafsson, H. J. Moon, L. Baksay, X. Jiang, Dmitry Blau, Y. J. Kwon, Jiangyong Jia, Y. Goto, Jongmin Lee, J. G. Lajoie, Aram Kim, Ryugo S. Hayano, Y. Riabov, Maya Hachiya Shimomura, O. Drapier, Frank Ellinghaus, C. Pinkenburg, D. Kleinjan, Kenta Shigaki, Hongfang Liu, D. E. Fields, S. Sawada, Y. Watanabe, Masamichi Ishihara, M. Nguyen, I. J. Choi, A. Kravitz, C. Oakley, Y. I. Makdisi, A. Drees, C. Baumann, C. P. Singh, E. R. Kinney, D. P. Morrison, Senta Greene, B. V. Jacak, M. Nihashi, S. Campbell, A. Taketani, Minghui Liu, A. S. Nyanin, I. Younus, M. Gonin, Rachid Nouicer, G. Roche, K. S. Sim, M. Proissl, D. S. Jumper, J. Ying, A. Franz, A. T. Basye, M. McCumber, T. Dahms, Rushan Han, P. Ružička, E. J. Desmond, D. Watanabe, M. Heffner, Kenneth Francis Read, V. S. Pantuev, B. M. Johnson, B. Fadem, E. O'Brien, M. D. Malik, R. P. Pisani, Tatsuya Chujo, T. Ichihara, K. Watanabe, K. Shoji, C. L. Woody, A. Berdnikov, M. Chiu, R. Yang, O. Dietzsch, E. T. Atomssa, A. Sukhanov, K. Kurita, T. Csörgå, J. Hanks, H. Valle, C. A. Ogilvie, E. Vznuzdaev, S. W. Nam, A. V. Kazantsev, J. Hamblen, H. Pereira, A. Caringi, S. Taneja, Dipanwita Dutta, T. K. Hemmick, I. Ravinovich, T. Horaguchi, E. Vazquez-Zambrano, P. W. Stankus, J. M. Durham, R. J. Petti, Viktor Riabov, Y. Morino, M. Naglis, Jen-Chieh Peng, Yasuo Miake, Vladimir Samsonov, G. S. Kyle, Julia Velkovska, K. Imai, M. Bai, L. Tomášek, M. J. Tannenbaum, I. V. Sourikova, James Alexander, Gary Grim, K. Okada, A. Enokizono, J. Sziklai, L. Kochenda, M. Issah, K. V. Dharmawardane, H. Torii, K. Karatsu, Inkyu Park, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, H. En'yo, Anne Marie Sickles, P. Chung, R. Pak, M. J. Leitch, K. Sakashita, Xiong Wang, Z. Conesa del Valle, Dong Jo Kim, Brian Cole, S. Yokkaichi, M. Kasai, T. C. Awes, Kyoichiro Ozawa, T. Liška, Alexandre Lebedev, M. K. Dayananda, Zhiying You, D. M. Lee, R. Bennett, M. Kurosawa, M. Ouchida, M. Wysocki, J. Newby, Jason Kamin, S. Rembeczki, J. S. Bok, Jun Kikuchi, K. B. Lee, M. Csanad, M. Kawashima, S. P. Stoll, N. Means, A. Veicht, G. R. Young, H. Qu, J. L. Nagle, Y. Tsuchimoto, Y. Iwanaga, A. Datta, M. Finger, I. Tserruya, S. S.E. Rosendahl, G. Bunce, Yu. Efremenko, Prashant Shukla, B. Komkov, V. Singh, Taku Gunji, H. Gong, J. H. Kang, J. Seele, J. S. Haggerty, Hideki Hamagaki, K. Aoki, D. Hornback, G. David, S. F. Pate, K. I. Hahn, M. Slunečka, Norio Saito, Tsutomu Mibe, I. E. Yushmanov, M. A. L. Leite, F. Kajihara, Alice Mignerey, Ke. Nakamura, H. Al-Bataineh, P. L. McGaughey, D. Jouan, L. D'Orazio, J. Jin, A. Glenn, A. Dion, M. I. Nagy, E. M. Takagui, S. Butsyk, R. Belmont, A. Taranenko, D. Roach, K. M. Kijima, Eunja Kim, R. S. Towell, S. Zhou, Takao Sakaguchi, Johannes Peter Wessels, Aaron Angerami, Kazushi Miki, V. Papavassiliou, I. Garishvili, F. Wei, Y. S. Lai, T. Kempel, S. D. Rolnick, Xingguo Li, W. A. Zajc, A. D. Frawley, Brajesh K. Singh, V. Baublis, A. Denisov, V. Cianciolo, Ajit Kumar Mohanty, C. Y. Chi, Sergey Fokin, T. A. Shibata, C. L. Silva, T. Sato, S. Huang, Beomkyu Kim, W. Holzmann, S. Tarafdar, D. Isenhower, A. Toia, J. E. Frantz, Eva Haslum, J. Murata, Alexei Khanzadeev, E. Stenlund, J. B. Choi, J. H. Bhom, T. V. Moukhanova, J. S. Kapustinsky, V. Babintsev, B. Azmoun, Y. J. Mao, A. Král, M. Oka, K. S. Lee, P. Liebing, K. S. Joo, N. Apadula, S. Esumi, D. Sharma, R. Ichimiya, Martin Purschke, A. Morreale, Z. Fraenkel, R. K. Choudhury, K. Fujiwara, K. N. Barish, S. Sano, Y. L. Yamaguchi, M. L. Brooks, H. W. Van Hecke, X. He, Y. Nakamiya, D. Lynch, Y. Aramaki, Robert Vertesi, S. Bathe, Agneta Oskarsson, B. Meredith, John Hill, Toru Sugitate, G. Baksay, J. Koster, Y. Berdnikov, Y. Akiba, François Fleuret, S. Nagamiya, H. Masui, B. Sahlmueller, Vaclav Vrba, Klaus Johannes Reygers, Y. J. Kim, B. Love, Rui Wei, S. N. White, J. T. Mitchell, R. Seidl, Deepa Thomas, Vladislav Manko, A. Kiss, Zvi Hirsh Citron, S. Belikov, Henner Buesching, Steve Edwards, K. Nakano, C. Vale, R. Seto, Marcus Hohlmann, Christine Angela Aidala, W. E. Sondheim, D. Ivanischev, L. A. Linden Levy, F. Matathias, Kensuke Homma, E. Richardson, I. Danchev, K. Boyle, B. Bassalleck, M. Konno, Takahiro Fusayasu, D. Silvermyr, W. J. Park, Christopher Rosen, A. Yanovich, R. A. Soltz, Y. Fukao, and D. Kawall
Subjects: Quark, Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, High Energy Physics::Phenomenology, Hadron, General Physics and Astronomy, Electron, Nuclear matter, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, D meson, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: The PHENIX experiment has measured electrons and positrons at midrapidity from the decays of hadrons containing charm and bottom quarks produced in d+Au and p+p collisions at sqrt[S(NN)]=200 GeV in the transverse-momentum range 0.85 ≤ p(T)(e) ≤ 8.5 GeV/c. In central d+Au collisions, the nuclear modification factor R(dA) at 1.5
Published: 2012

68. Erratum: Measurement of transverse single-spin asymmetries forJ/ψproduction in polarizedp+pcollisions ats=200 GeV[Phys. Rev. D82, 112008 (2010)]

Author: A. Adare, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander, H. Al-Ta’ani, A. Angerami, K. Aoki, N. Apadula, L. Aphecetche, Y. Aramaki, J. Asai, E. T. Atomssa, R. Averbeck, T. C. Awes, B. Azmoun, V. Babintsev, M. Bai, G. Baksay, L. Baksay, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, A. T. Basye, S. Bathe, S. Batsouli, V. Baublis, C. Baumann, A. Bazilevsky, S. Belikov, R. Belmont, R. Bennett, A. Berdnikov, Y. Berdnikov, J. H. Bhom, A. A. Bickley, D. S. Blau, J. G. Boissevain, J. S. Bok, H. Borel, N. Borggren, K. Boyle, M. L. Brooks, H. Buesching, V. Bumazhnov, G. Bunce, S. Butsyk, C. M. Camacho, S. Campbell, A. Caringi, B. S. Chang, W. C. Chang, J.-L. Charvet, C.-H. Chen, S. Chernichenko, C. Y. Chi, M. Chiu, I. J. Choi, J. B. Choi, R. K. Choudhury, P. Christiansen, T. Chujo, P. Chung, A. Churyn, O. Chvala, V. Cianciolo, Z. Citron, B. A. Cole, Z. Conesa del Valle, M. Connors, P. Constantin, M. Csanád, T. Csörgő, T. Dahms, S. Dairaku, I. Danchev, K. Das, A. Datta, G. David, M. K. Dayananda, A. Denisov, D. d’Enterria, A. Deshpande, E. J. Desmond, K. V. Dharmawardane, O. Dietzsch, A. Dion, M. Donadelli, L. D’Orazio, O. Drapier, A. Drees, K. A. Drees, A. K. Dubey, J. M. Durham, A. Durum, D. Dutta, V. Dzhordzhadze, S. Edwards, Y. V. Efremenko, F. Ellinghaus, T. Engelmore, A. Enokizono, H. En’yo, S. Esumi, K. O. Eyser, B. Fadem, D. E. Fields, M. Finger, F. Fleuret, S. L. Fokin, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, K. Fujiwara, Y. Fukao, T. Fusayasu, I. Garishvili, A. Glenn, H. Gong, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, G. Grim, M. Grosse Perdekamp, T. Gunji, H.-Å. Gustafsson, A. Hadj Henni, J. S. Haggerty, K. I. Hahn, H. Hamagaki, J. Hamblen, J. Hanks, R. Han, E. P. Hartouni, K. Haruna, E. Haslum, R. Hayano, M. Heffner, T. K. Hemmick, T. Hester, X. He, J. C. Hill, M. Hohlmann, W. Holzmann, K. Homma, B. Hong, T. Horaguchi, D. Hornback, S. Huang, T. Ichihara, R. Ichimiya, H. Iinuma, Y. Ikeda, K. Imai, J. Imrek, M. Inaba, D. Isenhower, M. Ishihara, T. Isobe, M. Issah, A. Isupov, D. Ivanischev, Y. Iwanaga, B. V. Jacak, J. Jia, X. Jiang, J. Jin, B. M. Johnson, T. Jones, K. S. Joo, D. Jouan, D. S. Jumper, F. Kajihara, S. Kametani, N. Kamihara, J. Kamin, J. H. Kang, J. Kapustinsky, K. Karatsu, M. Kasai, D. Kawall, M. Kawashima, A. V. Kazantsev, T. Kempel, A. Khanzadeev, K. M. Kijima, J. Kikuchi, A. Kim, B. I. Kim, D. H. Kim, D. J. Kim, E. J. Kim, E. Kim, S. H. Kim, Y.-J. Kim, E. Kinney, K. Kiriluk, Á. Kiss, E. Kistenev, J. Klay, C. Klein-Boesing, L. Kochenda, B. Komkov, M. Konno, J. Koster, A. Kozlov, A. Král, A. Kravitz, G. J. Kunde, K. Kurita, M. Kurosawa, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, Y. S. Lai, J. G. Lajoie, D. Layton, A. Lebedev, D. M. Lee, J. Lee, K. B. Lee, K. S. Lee, T. Lee, M. J. Leitch, M. A. L. Leite, B. Lenzi, P. Lichtenwalner, P. Liebing, L. A. Linden Levy, T. Liška, A. Litvinenko, H. Liu, M. X. Liu, X. Li, B. Love, D. Lynch, C. F. Maguire, Y. I. Makdisi, A. Malakhov, M. D. Malik, V. I. Manko, E. Mannel, Y. Mao, L. Mašek, H. Masui, F. Matathias, M. McCumber, P. L. McGaughey, N. Means, B. Meredith, Y. Miake, T. Mibe, A. C. Mignerey, P. Mikeš, K. Miki, A. Milov, M. Mishra, J. T. Mitchell, A. K. Mohanty, H. J. Moon, Y. Morino, A. Morreale, D. P. Morrison, T. V. Moukhanova, D. Mukhopadhyay, T. Murakami, J. Murata, S. Nagamiya, J. L. Nagle, M. Naglis, M. I. Nagy, I. Nakagawa, Y. Nakamiya, K. R. Nakamura, T. Nakamura, K. Nakano, S. Nam, J. Newby, M. Nguyen, M. Nihashi, T. Niita, R. Nouicer, A. S. Nyanin, C. Oakley, E. O’Brien, S. X. Oda, C. A. Ogilvie, K. Okada, M. Oka, Y. Onuki, A. Oskarsson, M. Ouchida, K. Ozawa, R. Pak, A. P. T. Palounek, V. Pantuev, V. Papavassiliou, I. H. Park, J. Park, S. K. Park, W. J. Park, S. F. Pate, H. Pei, J.-C. Peng, H. Pereira, V. Peresedov, D. Yu. Peressounko, R. Petti, C. Pinkenburg, R. P. Pisani, M. Proissl, M. L. Purschke, A. K. Purwar, H. Qu, J. Rak, A. Rakotozafindrabe, I. Ravinovich, K. F. Read, S. Rembeczki, K. Reygers, V. Riabov, Y. Riabov, E. Richardson, D. Roach, G. Roche, S. D. Rolnick, M. Rosati, C. A. Rosen, S. S. E. Rosendahl, P. Rosnet, P. Rukoyatkin, P. Ružička, V. L. Rykov, B. Sahlmueller, N. Saito, T. Sakaguchi, S. Sakai, K. Sakashita, V. Samsonov, S. Sano, T. Sato, S. Sawada, K. Sedgwick, J. Seele, R. Seidl, A. Yu. Semenov, V. Semenov, R. Seto, D. Sharma, I. Shein, T.-A. Shibata, K. Shigaki, M. Shimomura, K. Shoji, P. Shukla, A. Sickles, C. L. Silva, D. Silvermyr, C. Silvestre, K. S. Sim, B. K. Singh, C. P. Singh, V. Singh, M. Slunečka, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, C. Suire, A. Sukhanov, J. Sziklai, E. M. Takagui, A. Taketani, R. Tanabe, Y. Tanaka, S. Taneja, K. Tanida, M. J. Tannenbaum, S. Tarafdar, A. Taranenko, P. Tarján, H. Themann, D. Thomas, T. L. Thomas, M. Togawa, A. Toia, L. Tomášek, Y. Tomita, H. Torii, R. S. Towell, V-N. Tram, I. Tserruya, Y. Tsuchimoto, C. Vale, H. Valle, H. W. van Hecke, E. Vazquez-Zambrano, A. Veicht, J. Velkovska, R. Vértesi, A. A. Vinogradov, M. Virius, V. Vrba, E. Vznuzdaev, X. R. Wang, D. Watanabe, K. Watanabe, Y. Watanabe, F. Wei, J. Wessels, S. N. White, D. Winter, C. L. Woody, R. M. Wright, M. Wysocki, W. Xie, Y. L. Yamaguchi, K. Yamaura, R. Yang, A. Yanovich, J. Ying, S. Yokkaichi, G. R. Young, I. Younus, Z. You, I. E. Yushmanov, W. A. Zajc, O. Zaudtke, C. Zhang, S. Zhou, and L. Zolin
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, media_common.quotation_subject, Zero (complex analysis), Value (computer science), 01 natural sciences, Asymmetry, Nuclear physics, Transverse plane, Correlation function (statistical mechanics), 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, media_common, Spin-½
Abstract: We previously reported [Phys. Rev. D 82, 112008 (2010)] measurements of transverse single-spin asymmetries, A_N, in J/psi production from transversely polarized p+p collisions at sqrt(s)=200 GeV with data taken by the PHENIX experiment at the Relativistic Heavy Ion Collider in 2006 and 2008. Subsequently, we have found errors in the analysis procedures for the 2008 data, which resulted in an erroneous value for the extracted A_N. The errors affected the sorting of events into the correct left/right and forward/backward bins. This produced an incorrect value for the 2008 result, but the 2006 result is unaffected. We have conducted two independent reanalyses with these errors corrected, and we present here the corrected values for the 2008 data and the combined results for 2006 and 2008. The new combined spin asymmetry in the forward region is A_N = -0.026+/-0.026(stat)+/-0.003(sys). Since this asymmetry is consistent with zero, we no longer claim that our results suggest a possible non-zero trigluon correlation function in transversely polarized protons.
Published: 2012

69. Inclusive charged hadron elliptic flow in Au+Au collisions atsNN=7.7–39 GeV

Author: L. Adamczyk, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, C. D. Anson, D. Arkhipkin, E. Aschenauer, G. S. Averichev, J. Balewski, A. Banerjee, Z. Barnovska, D. R. Beavis, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, A. V. Brandin, S. G. Brovko, E. Bruna, S. Bültmann, I. Bunzarov, T. P. Burton, J. Butterworth, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, Z. Chang, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, P. Chung, J. Chwastowski, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, X. Cui, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, R. Derradi de Souza, S. Dhamija, L. Didenko, F. Ding, A. Dion, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, L. E. Dunkelberger, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, L. Eun, O. Evdokimov, R. Fatemi, S. Fazio, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, Y. Fisyak, C. A. Gagliardi, D. R. Gangadharan, F. Geurts, A. Gibson, S. Gliske, Y. N. Gorbunov, O. G. Grebenyuk, D. Grosnick, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, J. W. Harris, J. P. Hays-Wehle, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, S. Horvat, B. Huang, H. Z. Huang, P. Huck, T. J. Humanic, L. Huo, G. Igo, W. W. Jacobs, C. Jena, J. Joseph, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, A. Kesich, D. Kettler, D. P. Kikola, J. Kiryluk, I. Kisel, A. Kisiel, V. Kizka, S. R. Klein, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. Koroleva, W. Korsch, L. Kotchenda, P. Kravtsov, K. Krueger, I. Kulakov, L. Kumar, M. A. C. Lamont, J. M. Landgraf, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, L. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, X. Luo, A. Luszczak, G. L. Ma, Y. G. Ma, D. M. M. D. Madagodagettige Don, D. P. Mahapatra, R. Majka, O. I. Mall, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, B. Morozov, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, Md. Nasim, T. K. Nayak, J. M. Nelson, L. V. Nogach, J. Novak, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, P. Ostrowski, M. Pachr, B. S. Page, S. K. Pal, Y. X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, W. Peryt, P. Pile, M. Planinic, J. Pluta, D. Plyku, N. Poljak, J. Porter, A. M. Poskanzer, C. B. Powell, D. Prindle, C. Pruneau, N. K. Pruthi, M. Przybycien, P. R. Pujahari, J. Putschke, H. Qiu, R. Raniwala, S. Raniwala, R. L. Ray, R. Redwine, R. Reed, C. K. Riley, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, J. F. Ross, L. Ruan, J. Rusnak, N. R. Sahoo, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, A. M. Schmah, B. Schmidke, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, B. Sharma, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, R. N. Singaraju, M. J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, S. G. Steadman, G. S. F. Stephans, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, D. Thein, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, J. Turnau, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, A. Vossen, M. Wada, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, W. Witzke, Y. F. Wu, Z. Xiao, W. Xie, K. Xin, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, Y. Yi, K. Yip, I-K. Yoo, M. Zawisza, H. Zbroszczyk, J. B. Zhang, S. Zhang, W. M. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, Y. Zoulkarneeva, and M. Zyzak
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, 010308 nuclear & particles physics, Hadron, Elliptic flow, Collision, 01 natural sciences, Nuclear physics, Critical point (thermodynamics), Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Coordinate space, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: A systematic study is presented for centrality, transverse momentum (p(T)), and pseudorapidity (eta) dependence of the inclusive charged hadron elliptic flow (v(2)) at midrapidity (vertical bar eta vertical bar < 1.0) in Au + Au collisions at root s(NN) = 7.7, 11.5, 19.6, 27, and 39 GeV. The results obtained with different methods, including correlations with the event plane reconstructed in a region separated by a large pseudorapidity gap and four-particle cumulants (v(2){4}), are presented to investigate nonflow correlations and v(2) fluctuations. We observe that the difference between v(2){2} and v(2){4} is smaller at the lower collision energies. Values of v(2), scaled by the initial coordinate space eccentricity, v(2)/epsilon, as a function of p(T) are larger in more central collisions, suggesting stronger collective flow develops in more central collisions, similar to the results at higher collision energies. These results are compared to measurements at higher energies at the Relativistic Heavy Ion Collider (root s(NN) = 62.4 and 200 GeV) and at the Large Hadron Collider (Pb + Pb collisions at root s(NN) = 2.76 TeV). The v(2)(pT) values for fixed pT rise with increasing collision energy within the pT range studied (
Published: 2012

70. Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons inp+pcollisions ats=62.4 GeV

Author: C. L. Woody, A. Berdnikov, L. Tomáek, I. V. Sourikova, M. Ouchida, N. Means, J. Asai, Shingo Sakai, T. L. Thomas, Ryugo S. Hayano, S. P. Sorensen, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, Rachid Nouicer, Seong H. Kim, J. G. Lajoie, M. I. Nagy, M. Issah, Tae-Yeon Lee, Martin Purschke, I. J. Choi, A. Kravitz, M. D. Malik, E. Vznuzdaev, A. Morreale, Z. Fraenkel, A. Hadj Henni, S. Afanasiev, A. Ster, R. K. Choudhury, Mate Csanad, Beomkyu Kim, K. Boyle, Wei Xie, Takao Sakaguchi, C. Klein-Boesing, H. A. Gustafsson, A. D. Frawley, J. Newby, Minghui Liu, M. Heffner, Jen-Chieh Peng, S. Huang, C. Zhang, Kenneth Francis Read, J. T. Mitchell, W. Holzmann, Maya Hachiya Shimomura, L. Maek, H. Qu, David D'Enterria, D. Hornback, K. S. Joo, K. A. Drees, Xiong Wang, N. N. Ajitanand, Dong Jo Kim, R. Seidl, Y. I. Makdisi, M. Gonin, Vladislav Manko, Y. Ikeda, M. Slunečka, Tadaaki Isobe, A. Veicht, A. Taranenko, J. G. Boissevain, E. J. Mannel, S. Belikov, Vladimir Samsonov, S. Esumi, V. S. Pantuev, Hideki Hamagaki, K. Aoki, G. David, I. Tserruya, Yu. Efremenko, Viktor Riabov, Takahiro Nakamura, J. Jin, D. Sharma, R. Ichimiya, E. M. Takagui, V. Singh, C. Baumann, A. Sukhanov, S. Kametani, Kazushi Miki, M. J. Tannenbaum, H. Torii, P. L. McGaughey, B. Azmoun, A. Král, M. J. Kweon, Brajesh K. Singh, Laurent Bernard Aphecetche, Johannes Peter Wessels, Susumu Oda, H. Pereira, C. P. Singh, Y. Morino, Y. Fukao, B. M. Johnson, D. Mukhopadhyay, S. Rembeczki, C. Vale, B. S. Chang, K. O. Eyser, O. Dietzsch, A. K. Purwar, K. Fujiwara, K. Das, Tamas Ferenc Csorgo, E. T. Atomssa, C. Pinkenburg, E. P. Hartouni, M. Chiu, Herve Borel, Christine Angela Aidala, J. Klay, D. Lynch, R. A. Soltz, J. L. Nagle, M. Oka, H. Valle, A. Dion, K. Okada, Dipanwita Dutta, A. Durum, A. Isupov, E. J. Desmond, B. Sahlmueller, T. Hester, M. Stepanov, G. Roche, H. En'yo, M. J. Leitch, A. Yu. Semenov, J. Sziklai, K. Yamaura, S. Sawada, Atsushi Taketani, M. Grosse Perdekamp, A. Enokizono, P. Liebing, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, T. Engelmore, J. Ying, A. Franz, Brian Cole, Julia Velkovska, J. Gosset, C. Silvestre, F. Matathias, Kensuke Homma, R. S. Towell, M. Togawa, J. Park, Marisilvia Donadelli, V. Bumazhnov, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. Kawall, Eva Haslum, B. Lenzi, I. Garishvili, F. Wei, P. Constantin, D. P. Morrison, H. Iinuma, S. Chernichenko, A. P.T. Palounek, Andry Malala Rakotozafindrabe, S. Campbell, K. B. Lee, H. Themann, P. Mike, V-N. Tram, N. Grau, B. Bassalleck, V. E. Semenov, V. L. Rykov, T. Dahms, R. Tanabe, D. Layton, Y. Tsuchimoto, Tatsuya Chujo, H. W. Van Hecke, M. Konno, C. Y. Chi, C. A. Ogilvie, J. Murata, Motoi Inaba, S. Yokkaichi, S. Bathe, T. K. Hemmick, David Olle Rickard Silvermyr, M. Wysocki, G. S. Kyle, W. C. Chang, I. E. Yushmanov, A. V. Kazantsev, Gerd Joachim Kunde, Y. J. Mao, Agneta Oskarsson, T. Horaguchi, Yasuo Miake, James Alexander, C. M. Camacho, I. Shein, D. Roach, K. M. Kijima, Rushan Han, Y. Berdnikov, T. Kempel, Y. Akiba, Prashant Shukla, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, J. H. Kang, S. F. Pate, J. S. Haggerty, L. Kochenda, K. Sedgwick, D. Winter, M. Rosati, M. Mishra, S. Nagamiya, Philippe Rosnet, D. Yu Peressounko, H. Al-Bataineh, Dong-Hun Kim, Alberto Baldisseri, A. Deshpande, Alexandre Lebedev, R. Pak, Vaclav Vrba, Klaus Johannes Reygers, D. E. Fields, D. M. Lee, Xingguo Li, N. Kamihara, P. Tarján, B. V. Jacak, A. A. Vinogradov, T. C. Awes, Kyoichiro Ozawa, K. Kiriluk, Y. Watanabe, Y. L. Yamaguchi, V. Papavassiliou, Jiangyong Jia, Y. Goto, B. Komkov, Kazuyoshi Kurita, Jun Kikuchi, Y. S. Lai, I. Younus, A. Drees, Y. Nakamiya, M. McCumber, Norio Saito, A. Soldatov, K. Sakashita, Alexei Khanzadeev, G. Baksay, M. A. L. Leite, E. Stenlund, Jason Kamin, S. P. Stoll, A. Kiss, H. Liu, S. S.E. Rosendahl, G. Bunce, Henner Buesching, Senta Greene, J. S. Kapustinsky, M. Naglis, T. V. Moukhanova, C. L. Silva, K. Shoji, A. Churyn, R. Vértesi, Marcus Hohlmann, Masayasu Ishihara, D. Jouan, A. T. Basye, I. Ravinovich, V. Babintsev, E. H. Kim, J. E. Frantz, M. Bai, P. W. Stankus, B. Fadem, E. O'Brien, W. A. Zajc, R. Bennett, V. Baublis, M. Finger, S. Dairaku, O. Zaudtke, A. Denisov, V. Cianciolo, M. Virius, Y. Tomita, A. Glenn, Sergey Fokin, K. N. Barish, M. L. Brooks, X. He, V. Peresedov, J. L. Charvet, J. Koster, M. Kurosawa, P. Chung, T. Lika, J. Imrek, S. Batsouli, A. Datta, H. Masui, A. K. Dubey, A. A. Bickley, K. S. Sim, V. Dzhordzhadze, Y. Kwon, R. Yang, S. Taneja, K. Imai, Ajit Kumar Mohanty, Anne Marie Sickles, T. A. Shibata, T. Sato, B. Love, D. Isenhower, A. Toia, G. R. Young, A. G. Litvinenko, T. Niita, Y. Onuki, Jan Rak, R. Lacey, R. Granier de Cassagnac, A. Adare, A. Kozlov, R. Seto, K. Haruna, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Butsyk, S. Zhou, S. D. Rolnick, H. Pei, Y. Tanaka, F. Staley, L. Baksay, Charles Maguire, Kiyoshi Tanida, E. Kistenev, S. N. White, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, P. A. Rukoyatkin, B. Meredith, John Hill, P. Ruička, Toru Sugitate, François Fleuret, T. Ichihara, Takahiro Fusayasu, Alexander Malakhov, L. S. Zolin, W. J. Park, P. D. Barnes, and A. Yanovich
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, media_common.quotation_subject, High Energy Physics::Phenomenology, Hadron, Perturbative QCD, Polarization (waves), Deep inelastic scattering, 01 natural sciences, Helicity, Asymmetry, Gluon, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, media_common
Abstract: Unpolarized cross sections and double-helicity asymmetries of single-inclusive positive and negative charged hadrons at midrapidity from p + p collisions at root s = 62.4 GeV are presented. The PHENIX measurement of the cross sections for 1.0 < p(T) < 4.5 GeV/c are consistent with perturbative QCD calculations at next-to-leading order in the strong-coupling constant, alpha(s). Resummed pQCD calculations including terms with next-to-leading-log accuracy, yielding reduced theoretical uncertainties, also agree with the data. The double-helicity asymmetry, sensitive at leading order to the gluon polarization in a momentum-fraction range of 0.05 less than or similar to x(gluon) less than or similar to 0.2, is consistent with recent global parametrizations disfavoring large gluon polarization.
Published: 2012

71. Measurements ofD0andD*production inp+pcollisions ats=200 GeV

Author: C. D. Anson, Elena Bruna, William Axel Leight, K. Yip, M. J. Skoby, Frank Jm Geurts, Bedangadas Mohanty, Guo-Liang Ma, J. S. Wang, J. C. Dunlop, Z. P. Zhang, R. R. Debbe, A. S. Hirsch, P. Kravtsov, A. M. Schmah, Dmitry Smirnov, C. B. Powell, T. P. Burton, L. Kotchenda, R. G. Fersch, Jifa Tian, A. K. Bhati, D. Keane, S. G. Steadman, Zubayer Ahammed, M. J. LeVine, I. Koralt, R. Stock, F. Videbæk, G. Webb, Sukalyan Chattopadhyay, S. Heppelmann, Chitrasen Jena, Y. P. Lu, P. Djawotho, L. G. Efimov, Y. Yi, J. Rusnak, X. L. Wang, M. Wada, L. V. Nogach, E. C. Aschenauer, S. Margetis, Xuan Zhang, G. Eppley, A. V. Brandin, K. Xin, L. Li, T. K. Nayak, X. Dong, Q. Y. Shou, R. Fatemi, Michael Joseph Betancourt, J. A. Vanfossen, S. Fazio, I. G. Bordyuzhin, Mirko Planinic, S. K. Pal, Justin Stevens, Q. H. Xu, M. K. Mustafa, C. A. Whitten, L. Ruan, R. Corliss, Jana Bielcikova, Prabhat Ranjan Pujahari, J. L. Romero, Hanna Paulina Zbroszczyk, R. N. Singaraju, L. Huo, J. Alford, W. Guryn, F. Ding, E. Finch, Y. Panebratsev, Aditi Banerjee, D. Grosnick, J. Pluta, W. Li, H. Masui, A. Kesich, Amal Sarkar, P. Chaloupka, E. P. Sichtermann, J. Seele, R. Varma, James Prewitt Hays-Wehle, B. S. Page, D. R. Beavis, Haiyan Wang, Jake Y. Chen, Sergey Voloshin, Olga Evdokimov, Barbara Antonina Trzeciak, Y. Li, L. Didenko, Y. N. Gorbunov, M. Cherney, Lokesh Kumar, Hua Pei, J. Fedorisin, D. P. Kikola, B. Stringfellow, Z. Z. Xu, Rene Bellwied, Manish Sharma, R. S. Longacre, T. Kollegger, J. Balewski, Rashmi Raniwala, I. Sakrejda, L. C. Bland, Y. F. Wu, S. Trentalange, P. Ostrowski, X. Z. Cai, D. P. Mahapatra, Y. Wang, Nikita Smirnov, R. Reed, X. M. Sun, A. Luszczak, Y. H. Zhu, P. Sorensen, L. M. Lima, R. E. Tribble, S. Horvat, A. Szanto de Toledo, Jay Roberts, H. Z. Huang, Jize Zhao, J. Kapitan, F. Zhao, O. Hajkova, S. Vokal, C-Q. Li, F. Liu, Mariusz Przybycien, O. D. Tsai, Claude Andre Pruneau, M. Shao, Y. X. Pan, G. Van Buren, Zhigang Xiao, S. K. Gupta, A. Chikanian, Gerald W Hoffmann, T. Pawlak, M. Elnimr, M. C. Cervantes, E. G. Judd, J. G. Cramer, G. Igo, J. Novak, W. Witzke, Y. Mohammed, B. Sharma, J. Bouchet, P. Chung, O. I. Mall, A. V. Alakhverdyants, R. P. Scharenberg, Christina Markert, M. K. Mitrovski, Md. Nasim, R. D. Majka, J. L. Drachenberg, A. Sandacz, S. S. Shi, H. S. Matis, K. Krueger, Renato Aparecido Negrao De Oliveira, M. Calderon De La Barca Sanchez, T. Ullrich, Y. Yang, W. Borowski, K. Kauder, Wei Xie, Russell Richard Betts, J. Kiryluk, B. Huang, J. Schambach, P. Huck, Xiangyuan Cui, W. Christie, J. H. Chen, Rajarshi Ray, Sevil Salur, L-X. Han, Michal Sumbera, A. A. P. Suaide, G. M.S. Vasconcelos, Y. Pandit, S. LaPointe, Nilay Shah, D. G. Underwood, S. R. Klein, T. Tarnowsky, L. E. Dunkelberger, D. L. Olson, N. Schmitz, Y. G. Ma, W. Peryt, E. W. Oldag, J. Turnau, T. J. Humanic, E. Sangaline, T. S. McShane, D. Arkhipkin, E. Shahaliev, R. Witt, A. Hamed, W. M. Zhang, Anthony Robert Timmins, S. Mioduszewski, W. W. Jacobs, Adam Ryszard Kisiel, J. Lauret, B. D. Anderson, X.G. Li, C. M. Du, N. Xu, H. S. Xu, P. Filip, L. Eun, Donald M. McDonald, N. K. Pruthi, P. Seyboth, J. Cheng, T. J. M. Symons, H. J. Crawford, Prithwish Tribedy, B. K. Srivastava, B. Morozov, S. W. Wissink, Y. Zhang, Janet Elizabeth Seger, R. Lednicky, L. C. De Silva, D. J. Hofman, Anju Bhasin, Nikola Poljak, Y. J. Sun, Jongmin Lee, P. Pile, J. Takahashi, J. E. Draper, M. A. C. Lamont, S. Kabana, Leszek Adamczyk, J. F. Ross, R. P. Redwine, R. Derradi de Souza, K. Kang, Y. P. Viyogi, A. Lebedev, G. D. Westfall, Vitaly Okorokov, T. G. Dedovich, W. J. Llope, B. Pawlik, Zhiming Li, Basanta Kumar Nandi, Bernd Surrow, S. Zhang, W. Xu, T. Ljubicic, Wolfgang Korsch, J. W. Harris, M. J. M. Codrington, A. M. Poskanzer, H. Bichsel, H. Caines, Sudhir Raniwala, O. G. Grebenyuk, Y. Zoulkarneeva, C. Zhong, Alice Elisabeth Ohlson, J. Putschke, C. K. Riley, Xiaofeng Zhu, M. Naglis, Q. Wang, J. M. Butterworth, A. Ogawa, T. R. Schuster, J. C. Webb, H. F. Chen, Thomas A. Trainor, G. J. van Nieuwenhuizen, Hao Qiu, P. Yepes, A. Davila Leyva, Y. Fisyak, X. G. Luo, K. Oh, A. H. Tang, Marcelo Gameiro Munhoz, D. J. Prindle, C. A. Gagliardi, G. Wang, I. G. Alekseev, Donika Plyku, M. A. Lisa, I. Bunzarov, M. Pachr, Z. J. Sun, Jian Deng, G. Agakishiev, D. Cebra, Jaroslav Bielcik, Jie Zhang, Z. Barnovska, O. V. Rogachevskiy, A. Dion, D. D. Koetke, L. Xue, Li-Zhu Chen, Madan M. Aggarwal, Fuqiang Wang, A. Vossen, D. Tlusty, D. M.M.D. Madagodagettige Don, D. R. Gangadharan, Niladribihari Sahoo, J. Engelage, J. M. Landgraf, B. Haag, Zebo Tang, Janusz Chwastowski, M. Strikhanov, J. Konzer, C. Perkins, G. Odyniec, J. Sandweiss, D. Thein, D. Solanki, M. Tokarev, T. D. S. Stanislaus, H. H. Wieman, A. Kechechyan, R. Cendejas, V. A. Kizka, J. H. Thomas, U. G. Desouza, D. Kettler, G. S. Averichev, M. Zawisza, H. M. Spinka, J. Porter, L. H. Tarini, L. Koroleva, B. Schmidke, H. W. Ke, Y. F. Xu, S. Dhamija, S. G. Brovko, I-K. Yoo, M. C. Suarez, D. N. Svirida, J. M. Joseph, Stephen V. Gliske, H. G. Ritter, and S. Bueltmann
Subjects: Scattering cross-section, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Star (game theory), High Energy Physics::Phenomenology, Hadron, Perturbative QCD, Charge (physics), 01 natural sciences, 0103 physical sciences, Transverse momentum, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, 010306 general physics, Energy (signal processing)
Abstract: We report measurements of charmed-hadron $({D}^{0},{D}^{*})$ production cross sections at midrapidity in $p+p$ collisions at a center-of-mass energy of 200 GeV by the STAR experiment. Charmed hadrons were reconstructed via the hadronic decays ${D}^{0}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$, ${D}^{*+}\ensuremath{\rightarrow}{D}^{0}{\ensuremath{\pi}}^{+}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{+}$ and their charge conjugates, covering the ${p}_{T}$ range of $0.6--2.0$ and $2.0--6.0\text{ }\text{ }\mathrm{GeV}/c$ for ${D}^{0}$ and ${D}^{*+}$, respectively. From this analysis, the charm-pair production cross section at midrapidity is $d\ensuremath{\sigma}/dy{|}_{y=0}^{c\overline{c}}=170\ifmmode\pm\else\textpm\fi{}45(\mathrm{stat}{)}_{\ensuremath{-}59}^{+38}(\mathrm{sys})\text{ }\text{ }\ensuremath{\mu}\mathrm{b}$. The extracted charm-pair cross section is compared to perturbative QCD calculations. The transverse momentum differential cross section is found to be consistent with the upper bound of a fixed-order next-to-leading logarithm calculation.
Published: 2012

72. Direct photon production inp+pcollisions ats=200 GeVat midrapidity

Author: K. B. Lee, Takao Sakaguchi, C. Klein-Boesing, R. Vértesi, A. D. Frawley, Jen-Chieh Peng, S. Huang, J. T. Mitchell, A. Kiss, Xiong Wang, W. Holzmann, Henner Buesching, D. Roach, K. M. Kijima, Dong Jo Kim, G. S. Kyle, J. E. Frantz, R. Seidl, Vladislav Manko, D. E. Fields, Marcus Hohlmann, C. Silvestre, James Alexander, B. V. Jacak, M. Slunečka, M. McCumber, A. Veicht, Marisilvia Donadelli, V. Bumazhnov, Andry Malala Rakotozafindrabe, P. Mikeš, S. Belikov, R. Averbeck, Byung-Sik Hong, S. Bathe, R. Tanabe, D. Layton, A. Deshpande, A. Bazilevsky, Xingguo Li, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, T. Engelmore, M. Mishra, S. Nagamiya, W. C. Chang, J. L. Charvet, Philippe Rosnet, Vaclav Vrba, Klaus Johannes Reygers, Mate Csanad, O. Drapier, Frank Ellinghaus, E. R. Kinney, Alexandre Lebedev, M. Kurosawa, Rushan Han, D. P. Morrison, S. Campbell, P. Chung, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, V. E. Semenov, J. Imrek, D. M. Lee, T. L. Thomas, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, V. Singh, Y. Watanabe, K. O. Eyser, A. K. Purwar, K. Fujiwara, Anne Marie Sickles, K. Kiriluk, Ajit Kumar Mohanty, T. A. Shibata, T. Sato, David D'Enterria, E. H. Kim, A. Hadj Henni, E. J. Desmond, K. N. Barish, Beomkyu Kim, K. Boyle, Wei Xie, A. V. Kazantsev, Maya Hachiya Shimomura, S. P. Sorensen, F. Matathias, I. Younus, M. Togawa, J. Park, C. A. Ogilvie, Charles Maguire, Y. I. Makdisi, S. Dairaku, T. K. Hemmick, Ryugo S. Hayano, Y. Riabov, Yasuo Miake, D. Isenhower, A. Toia, L. Mašek, T. Niita, Kensuke Homma, Kenta Shigaki, M. Nguyen, P. Constantin, S. Chernichenko, M. J. Tannenbaum, H. Qu, Y. Tsuchimoto, K. A. Drees, H. Torii, N. N. Ajitanand, L. Kochenda, Takahiro Nakamura, Y. Fukao, L. Tomášek, H. W. Van Hecke, A. Soldatov, I. E. Yushmanov, A. S. Nyanin, Eva Haslum, B. Lenzi, D. Mukhopadhyay, S. Rembeczki, T. Hester, B. Bassalleck, M. Konno, Susumu Oda, Rachid Nouicer, Hideki Hamagaki, K. Aoki, O. Zaudtke, S. Afanasiev, A. Ster, Vladimir Samsonov, Alexei Khanzadeev, Kiyoshi Tanida, G. R. Young, J. Newby, A. Durum, Y. L. Yamaguchi, Taku Gunji, H. Gong, J. Seele, G. David, Seong H. Kim, M. Naglis, C. L. Silva, F. Kajihara, B. Komkov, J. G. Lajoie, K. Yamaura, M. L. Brooks, E. Stenlund, Y. Nakamiya, R. Pak, N. Kamihara, Y. J. Mao, T. Horaguchi, Masayasu Ishihara, S. Butsyk, W. A. Zajc, V-N. Tram, E. Kistenev, D. Hornback, G. Baksay, Norio Saito, M. A. L. Leite, T. C. Awes, Kyoichiro Ozawa, T. Liška, N. Grau, Jun Kikuchi, D. Kawall, H. Themann, M. Virius, S. Zhou, K. Das, A. Taranenko, V. S. Pantuev, Motoi Inaba, B. Sahlmueller, J. Murata, A. Drees, I. J. Choi, A. Kravitz, Kazushi Miki, V. Baublis, A. Denisov, Brajesh K. Singh, E. P. Hartouni, Gerd Joachim Kunde, V. Cianciolo, I. Shein, Y. Tomita, B. Love, S. D. Rolnick, K. Sakashita, K. Sedgwick, H. Liu, J. S. Kapustinsky, M. Ouchida, K. S. Sim, V. Babintsev, K. Shoji, Alberto Baldisseri, Minghui Liu, N. Means, J. Asai, J. H. Kang, V. Dzhordzhadze, Sergey Fokin, Jason Kamin, J. S. Haggerty, P. W. Stankus, M. Heffner, S. P. Stoll, Kenneth Francis Read, A. G. Litvinenko, K. Okada, M. Gonin, S. S.E. Rosendahl, G. Bunce, Shingo Sakai, Y. Kwon, Tadaaki Isobe, A. Churyn, J. Jin, E. M. Takagui, J. L. Nagle, H. En'yo, D. Jouan, A. Glenn, I. Ravinovich, C. L. Woody, A. Berdnikov, M. J. Leitch, A. Kozlov, R. Seto, P. L. McGaughey, K. Haruna, C. Baumann, S. Kametani, R. Yang, T. Kempel, Dong-Hun Kim, M. Chiu, I. V. Sourikova, C. P. Singh, A. Sukhanov, K. Kurita, H. Pereira, M. Bai, X. He, B. M. Johnson, V. Peresedov, K. Imai, J. Koster, Y. Morino, A. Isupov, S. Batsouli, H. Masui, A. K. Dubey, A. A. Bickley, J. Sziklai, Y. Onuki, Brian Cole, H. Iinuma, Y. S. Lai, Y. Ikeda, J. G. Boissevain, Jan Rak, R. S. Towell, R. Bennett, A. P.T. Palounek, Y. Tanaka, M. Finger, I. Garishvili, F. Wei, C. Pinkenburg, R. Lacey, M. Stepanov, G. Roche, R. Granier de Cassagnac, A. Adare, E. Mannel, A. Yu. Semenov, H. A. Gustafsson, J. Gosset, C. Y. Chi, C. Zhang, S. Yokkaichi, P. Ružička, Herve Borel, D. Lynch, Viktor Riabov, A. Taketani, F. Staley, L. Baksay, V. L. Rykov, T. Dahms, H. Pei, K. S. Joo, O. Dietzsch, E. T. Atomssa, H. Valle, Dipanwita Dutta, Julia Velkovska, M. Rosati, A. A. Vinogradov, Jiangyong Jia, Y. Goto, S. Esumi, D. Sharma, R. Ichimiya, Tae-Yeon Lee, Martin Purschke, A. Morreale, Z. Fraenkel, R. A. Soltz, R. K. Choudhury, M. Grosse Perdekamp, B. Azmoun, A. Král, S. N. White, M. J. Kweon, D. Winter, D. Yu Peressounko, P. Tarján, T. Csörgő, Zvi Hirsh Citron, Senta Greene, A. T. Basye, K. Nakano, M. Oka, B. Fadem, E. O'Brien, M. Wysocki, W. E. Sondheim, C. M. Camacho, A. Dion, Prashant Shukla, D. Ivanischev, S. F. Pate, P. A. Rukoyatkin, T. Ichihara, H. Al-Bataineh, A. Enokizono, P. Liebing, Takahiro Fusayasu, Alexander Malakhov, V. Papavassiliou, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, T. V. Moukhanova, S. Sawada, J. Ying, A. Franz, B. Meredith, John Hill, Toru Sugitate, François Fleuret, M. I. Nagy, M. Issah, M. D. Malik, E. Vznuzdaev, L. Aphecetche, and Johannes Peter Wessels
Subjects: Physics, Scattering cross-section, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Photon, 010308 nuclear & particles physics, 01 natural sciences, Nuclear physics, Cross section (physics), 0103 physical sciences, Transverse momentum, Angular dependence, PHENIX detector, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: The differential cross section for the production of direct photons in p + p collisions at root s = 200 GeV at midrapidity was measured in the PHENIX detector at the Relativistic Heavy Ion Collider. Inclusive direct photons were measured in the transverse momentum range from 5: 5-25 GeV/c, extending the range beyond previous measurements. Event structure was studied with an isolation criterion. Next-to-leading-order perturbative-quantum-chromodynamics calculations give a good description of the spectrum. When the cross section is expressed versus x(T), the PHENIX data are seen to be in agreement with measurements from other experiments at different center-of-mass energies.
Published: 2012

73. Measurement of Direct Photons inAu+AuCollisions atsNN=200 GeV

Author: I. Ravinovich, M. Rosati, Y. Nagata, G. C. Mishra, A. V. Kazantsev, Takao Sakaguchi, S. S. Ryu, C. Klein-Boesing, A. A. Vinogradov, Henrik Tydesjö, R. A. Soltz, J. G. Boissevain, Masashi Kaneta, J. M. Burward-Hoy, A. D. Frawley, Jiangyong Jia, J. T. Mitchell, A. Ster, Y. Goto, H. A. Gustafsson, M. Grosse Perdekamp, M. E. Connors, R. Bennett, Robert F. Hobbs, S. H. Aronson, R. S. Towell, Akio Kiyomichi, N. Kurihara, Marie Germain, M. G. Hur, Ahmed Al-Jamel, C. Y. Chi, T. C. Awes, Kyoichiro Ozawa, C. Zhang, Osamu Jinnouchi, Matthew G. Reuter, David D'Enterria, C. Pinkenburg, Y. J. Kwon, W. C. Smith, J. Newby, Anne Marie Sickles, A. G. Litvinenko, B. Azmoun, W. Holzmann, M. J. Kweon, B. Komkov, I. D. Ojha, M. K. Lee, Vladislav Manko, Alexander Malakhov, R. P. Pisani, A. Deshpande, D. Winter, M. Chiu, M. Stepanov, G. Roche, V. Bumazhnov, M. P. Comets, D. Yu Peressounko, Steven E. Skutnik, J. E. Frantz, D. Silvermyr, Y. Le Bornec, S. P. Sorensen, K. Das, Masamichi Ishihara, Nikolay Tyurin, E. P. Hartouni, Minghui Liu, Viktor Riabov, M. N. Wagner, C. A. Ogilvie, Herve Borel, T. A. Shibata, Shingo Sakai, L. S. Zolin, T. K. Hemmick, P. Tarján, M. Heffner, Kenneth Francis Read, T. L. Thomas, Alexei Khanzadeev, Debashish Pal, S. Sawada, A. Kozlov, A. Franz, T. Ichihara, Y. Fukao, R. Seto, K. Haruna, Norio Saito, A. Glenn, A. Taketani, H. Qu, M. A. L. Leite, Yasuo Miake, A. Dion, D. E. Fields, B. V. Jacak, V. L. Rykov, T. Dahms, T. Tabaru, Ryugo S. Hayano, Jen-Chieh Peng, Y. Riabov, Hideki Hamagaki, K. Aoki, G. David, S. Kametani, V. Dzhordzhadze, S. Takagi, B. Espagnon, Kenta Shigaki, Senta Greene, M. Nguyen, E. Stenlund, A. K. Purwar, D. Isenhower, C. Vale, M. Issah, W. A. Zajc, K. N. Barish, J. H. Kang, J. S. Haggerty, A. Romana, L. Kochenda, A. Kiss, A. Taranenko, O. Zaudtke, Margaret Harvey, B. E. Norman, V-N. Tram, A. S. Nyanin, E. O'Brien, Christine Angela Aidala, S. F. Pate, G. R. Young, M. D. Malik, Charles Maguire, S. Leckey, Motoi Inaba, V. Baublis, A. Denisov, V. Cianciolo, E. Vznuzdaev, J. G. Lajoie, M. N. Hagiwara, V. S. Pantuev, O. Dietzsch, Xiong Wang, S. Kelly, C. R. Cleven, Henner Buesching, Sergey Fokin, V. Babintsev, T. Hachiya, N. N. Ajitanand, H. Valle, Josh Moss, S. Butsyk, Vladimir Samsonov, Dong Jo Kim, I. Otterlund, G. S. Kyle, T. Horaguchi, J. L. Drachenberg, N. Willis, James Alexander, T. Kawagishi, P. J. Kroon, Y. Cobigo, Takahiro Nakamura, M. T. Bjorndal, V. Papavassiliou, Sébastien Gadrat, T. E. Miller, Jan Rak, I. J. Choi, Maya Hachiya Shimomura, J. M. Heuser, Julia Velkovska, Kiyoshi Tanida, Tadaaki Isobe, Y. I. Makdisi, R. Averbeck, Byung-Sik Hong, Tamas Ferenc Csorgo, R. Lacey, M. Gonin, M. L. Brooks, A. Bazilevsky, J. S. Chai, A. Enokizono, L. Aphecetche, J. L. Nagle, Philippe Rosnet, B. Sahlmueller, K. Okada, K. Hasuko, S. Afanasiev, R. Granier de Cassagnac, E. Kistenev, Alexandre Lebedev, T. Shohjoh, H. En'yo, N. Grau, J. Egdemir, K. Kurita, H. Pereira, D. M. Lee, A. Durum, P. L. McGaughey, J. Imrek, M. Holmes, P. Constantin, M. J. Tannenbaum, M. J. Leitch, K. Shoji, Joakim Nystrand, Alexander Milov, X. He, O. O. Omiwade, D. S. Brown, Eva Haslum, P. W. Stankus, D. Mukhopadhyay, V. Peresedov, D. Bucher, O. Drapier, R. Pak, Taku Gunji, K. S. Sim, Hiroaki Ohnishi, M. Csanad, S. P. Stoll, E. R. Kinney, Junji Tojo, F. Kajihara, D. P. Morrison, S. Campbell, H. Hiejima, T. V. Moukhanova, S. S.E. Rosendahl, Johannes Peter Wessels, H. Delagrange, V. E. Semenov, J. Zimányi, K. Imai, H. Masui, G. Bunce, Tatsuya Chujo, I. Tserruya, C. L. Woody, Yu. Efremenko, H. Harada, W. J. Park, J.-G. Park, E. J. Desmond, A. K. Dubey, P. D. Barnes, A. Yanovich, S. N. White, V. Singh, W. E. Sondheim, K. Boyle, P. A. Rukoyatkin, S. Y. Fung, John Hill, H. A. Torii, Toru Sugitate, L. D. Isenhower, Xingguo Li, Kensuke Homma, A. Hadj Henni, S. Chernichenko, M. Togawa, S. Batsouli, D. Jouan, H. Lim, Y. S. Kim, B. Bassalleck, François Fleuret, B. Forestier, I. V. Sourikova, H. W. Van Hecke, Florian Bauer, Wei Xie, M. Konno, Hirohiko Sato, S. K. Tuli, S. Bathe, Y. Tsuchimoto, Agneta Oskarsson, J. Gosset, H. Iinuma, M. C. McCain, Y. Berdnikov, Y. Akiba, I. E. Yushmanov, Eun-Hee Kim, A. P.T. Palounek, S. Nagamiya, Kazuhiro Tanaka, J. P. Sullivan, Klaus Johannes Reygers, Y. Tanaka, N. Kamihara, S. Yokkaichi, T. K. Shea, F. Matathias, R. Armendariz, A. Drees, F. Staley, H. Pei, R. Vértesi, J. Murata, Y. Watanabe, Saskia Mioduszewski, J. Jin, E. M. Takagui, C. P. Singh, B. M. Johnson, A. Isupov, C. Suire, J. Sziklai, Brian Cole, I. Younus, S. Belikov, K. S. Joo, M. Wysocki, A. Soldatov, M. Naglis, C. L. Silva, S. Esumi, D. Sharma, Martin Purschke, F. Gastineau, Susumu Sato, D. Kotchetkov, V. I. Kochetkov, Z. Fraenkel, Gerd Joachim Kunde, I. Shein, Alberto Baldisseri, and J. Chiba
Subjects: Physics, Range (particle radiation), Photon, 010308 nuclear & particles physics, Bremsstrahlung, General Physics and Astronomy, Parton, Plasma, 01 natural sciences, 7. Clean energy, Distribution function, Isospin, 0103 physical sciences, Quark–gluon plasma, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: We report the measurement of direct photons at midrapidity in Au + Au collisions at root s(NN) = 200 GeV. The direct photon signal was extracted for the transverse momentum range of 4 GeV/c < pT < 22 GeV/c, using a statistical method to subtract decay photons from the inclusive photon sample. The direct photon nuclear modification factor R-AA was calculated as a function of p(T) for different Au + Au collision centralities using the measured p + p direct photon spectrum and compared to theoretical predictions. R-AA was found to be consistent with unity for all centralities over the entire measured pT range. Theoretical models that account for modifications of initial direct photon production due to modified parton distribution functions in Au and the different isospin composition of the nuclei predict a modest change of R-AA from unity. They are consistent with the data. Models with compensating effects of the quark-gluon plasma on high-energy photons, such as suppression of jet-fragmentation photons and induced-photon bremsstrahlung from partons traversing the medium, are also consistent with this measurement.
Published: 2012

74. Transverse single-spin asymmetry and cross section forπ0andηmesons at large Feynmanxinp↑+pcollisions ats=200 GeV

Author: R. S. Longacre, H. Z. Huang, S. Vokal, Madan M. Aggarwal, Fuqiang Wang, G. Igo, J. Novak, J. Kiryluk, J. H. Chen, Xiaofeng Luo, B. Sharma, A. Sandacz, Y. F. Wu, Guo-Liang Ma, J. Bouchet, P. Seyboth, J. L. Drachenberg, Olga Evdokimov, Barbara Antonina Trzeciak, K. Kauder, S. G. Brovko, J. Butterworth, O. D. Tsai, Leszek Adamczyk, M. Elnimr, M. C. Cervantes, M. C. Suarez, D. N. Svirida, Z. P. Zhang, Sevil Salur, R. Derradi de Souza, A. S. Hirsch, P. Kravtsov, A. M. Schmah, A. Vossen, Jay Roberts, A. Chikanian, I. K. Yoo, Thorsten Sven Kollegger, Xuan Zhang, M. J. M. Codrington, T. J. Humanic, J. L. Romero, H. W. Ke, B. Haag, W. Xu, S. Heppelmann, Hanna Paulina Zbroszczyk, Wolfgang Korsch, D. R. Beavis, Marcelo Gameiro Munhoz, D. J. Prindle, E. Finch, Sergey Voloshin, F. Videbæk, G. Webb, E. G. Judd, Q. H. Xu, Vitaly Okorokov, E. Sangaline, D. Arkhipkin, L. Kotchenda, A. Hamed, R. Varma, Bernd Surrow, Stephen V. Gliske, H. Pei, L. Eun, Zebo Tang, Janusz Chwastowski, J. Putschke, Sukalyan Chattopadhyay, James Prewitt Hays-Wehle, J. B. Zhang, Xiaofeng Zhu, G. Eppley, Y. Wang, P. Chung, B. S. Page, J. E. Draper, F. Zhao, J. Porter, C. D. Anson, D. P. Kikola, B. Stringfellow, R. N. Singaraju, L. Huo, B. Pawlik, R. Witt, S. Mioduszewski, Wei Xie, M. Naglis, I. G. Alekseev, Donika Plyku, M. A. Lisa, J. W. Harris, Chitrasen Jena, O. I. Mall, M. A.C. Lamont, L-X. Han, J. Pluta, W. Li, B. Huang, Bedangadas Mohanty, G. Wang, C. A. Gagliardi, M. Pachr, Donald M. McDonald, Prithwish Tribedy, B. K. Srivastava, A. Ogawa, H. F. Chen, Thomas A. Trainor, C-Q. Li, R. P. Scharenberg, Christina Markert, Y. P. Lu, A. Luszczak, D. Smirnov, J. G. Cramer, Rene Bellwied, P. Yepes, A. Davila Leyva, S. Dhamija, C. Perkins, Jaroslav Bielcik, P. R. Pujahari, H. S. Matis, C. B. Powell, K. Yip, J. S. Wang, A. H. Tang, Z. J. Sun, M. K. Mustafa, J. Joseph, G. M.S. Vasconcelos, Y. Pandit, N. Schmitz, E. Shahaliev, Basanta Kumar Nandi, A. M. Poskanzer, A. Kechechyan, J. Alford, W. Guryn, Y. H. Zhu, H. G. Ritter, R. G. Fersch, I. Koralt, L. M. Lima, R. E. Tribble, J. C. Dunlop, M. Shao, Y. X. Pan, G. Van Buren, Jize Zhao, S. S. Shi, I. Bunzarov, W. W. Jacobs, L. V. Nogach, Gerald W Hoffmann, R. R. Debbe, M. Wada, R. Cendejas, Zubayer Ahammed, J. Lauret, D. Thein, T. P. Burton, M. J. LeVine, S. Bueltmann, O. V. Rogachevskiy, Y. Li, R. A.N. Oliveira, C. K. Riley, M. J. Skoby, Frank Jm Geurts, M. Calderon De La Barca Sanchez, R. Lednicky, S. G. Steadman, G. Van Nieuwenhuizen, Z. Barnovska, T. Tarnowsky, P. Djawotho, Xiangming Sun, D. P. Mahapatra, O. G. Grebenyuk, Jifa Tian, D. D. Koetke, J. F. Ross, L. Xue, H. Qiu, Michal Sumbera, A. A. P. Suaide, M. Tokarev, Q. Y. Shou, E. W. Oldag, W. J. Llope, T. S. McShane, D. Tlusty, I. G. Bordyuzhin, Mirko Planinic, S. W. Wissink, Jian Deng, Y. Zhang, D. Solanki, Y. Xu, B. D. Anderson, G. Agakishiev, Elena Bruna, J. Fedorisin, S. H. Zhang, B. Schmidke, P. Chaloupka, Y. G. Ma, W. Peryt, Nikola Poljak, Z. J. Xu, S. Fazio, N. K. Pruthi, Y. N. Gorbunov, A. V. Brandin, T. D. S. Stanislaus, Y. Fisyak, H. H. Wieman, A. Ohlson, K. Xin, O. Hajkova, D. Cebra, S. Trentalange, L. Li, K. Oh, J. Seele, Y. J. Sun, H. Bichsel, G. Odyniec, A. Kesich, Y. Zoulkarneeva, C. Zhong, S. Kabana, Haiyan Wang, Y. P. Viyogi, J. Turnau, I. Sakrejda, S. Horvat, A. Szanto de Toledo, J. Kapitan, Q. Wang, X. Z. Cai, M. K. Mitrovski, N. R. Sahoo, Y. Yang, S. LaPointe, T. R. Schuster, T. Pawlak, W. Witzke, Y. Mohammed, Nilay Shah, David Jonathan Hofman, H. Masui, T. G. Dedovich, A. V. Alakhverdyants, A. Sarkar, Russell Richard Betts, J. Takahashi, D. G. Underwood, J. Cheng, T. J. M. Symons, L. C. De Silva, J. Engelage, F. Ding, P. Ostrowski, Y. Panebratsev, D. Grosnick, J. M. Landgraf, Zhigang Xiao, Anju Bhasin, M. Sharma, Rolf K. Reed, M. Strikhanov, A. K. Bhati, D. Keane, R. P. Redwine, Nikolai Smirnov, R. Stock, L. G. Efimov, T. K. Nayak, J. Konzer, K. Kang, X. L. Wang, E. C. Aschenauer, A. Lebedev, S. Margetis, X. Dong, J. Sandweiss, S. K. Pal, Justin Stevens, Nasim, Jongmin Lee, R. L. Ray, X. Li, T. Ljubicic, D. M.M.D. Madagodagettige Don, D. R. Gangadharan, Y. Yi, J. Rusnak, H. Caines, Sudhir Raniwala, C. A. Whitten, L. Ruan, E. P. Sichtermann, J. Balewski, Rashmi Raniwala, R. Corliss, Claude Andre Pruneau, T. Ullrich, A. Dion, N. Xu, C. M. Du, H. S. Xu, P. Filip, P. Pile, G. D. Westfall, F. Liu, Mariusz Przybycien, William Axel Leight, S. R. Klein, L. E. Dunkelberger, D. L. Olson, R. D. Majka, A. Bannerjee, R. Fatemi, Michael Joseph Betancourt, J. Y. Chen, W. Borowski, J. Schambach, K. Krueger, J. A. Vanfossen, Xiangyuan Cui, W. Christie, M. Cherney, Lokesh Kumar, W. M. Zhang, Jana Bielcikova, B. Morozov, S. K. Gupta, Janet Elizabeth Seger, P. Huck, Anthony Robert Timmins, Adam Ryszard Kisiel, P. Sorensen, H. J. Crawford, L. Didenko, Zhiming Li, J. C. Webb, L. H. Tarini, L. Koroleva, Li-Yi Chen, M. Zawisza, H. M. Spinka, V. A. Kizka, J. H. Thomas, U. G. Desouza, D. Kettler, and G. S. Averichev
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, media_common.quotation_subject, Perturbative QCD, 01 natural sciences, Asymmetry, Cross section (geometry), Transverse plane, symbols.namesake, 0103 physical sciences, symbols, Feynman diagram, Rapidity, Atomic physics, 010306 general physics, media_common, Spin-½
Abstract: Measurements of the differential cross section and the transverse single-spin asymmetry, A(N), vs x(F) for pi(0) and eta mesons are reported for 0.4 0.55, is consistent with a perturbative QCD prediction, and the eta/pi(0) cross-section ratio agrees with existing midrapidity measurements. For 0.55 < x(F) < 0.75, the average A(N) for eta is 0.210 +/- 0.056, and that for pi(0) is 0.081 +/- 0.016. The probability that these two asymmetries are equal is similar to 3%.
Published: 2012

75. Nuclear-modification factor for open-heavy-flavor production at forward rapidity in Cu+Cu collisions atsNN=200GeV

Author: Tadaaki Isobe, T. E. Miller, P. L. McGaughey, I. Tserruya, P. Chung, W. S. Emam, M. Chiu, S. F. Pate, Yu. Efremenko, H. Al-Bataineh, V. Singh, V. Papavassiliou, Sébastien Gadrat, T. A. Shibata, S. Takagi, K. N. Barish, M. L. Brooks, A. V. Kazantsev, Mate Csanad, L. Tomášek, P. Mikeš, Robert F. Hobbs, D. Isenhower, A. Toia, L. Mašek, B. Love, Alexander Milov, A. G. Litvinenko, T. C. Awes, Kyoichiro Ozawa, T. Liška, D. E. Fields, I. Nakagawa, B. V. Jacak, Jun Kikuchi, O. Drapier, Frank Ellinghaus, A. Kozlov, E. R. Kinney, R. Seto, H. Kanou, Taku Gunji, H. Gong, R. Vértesi, G. S. Kyle, Debashish Pal, D. P. Morrison, K. Haruna, M. McCumber, J. Seele, S. Sawada, S. Campbell, F. Kajihara, V. E. Semenov, J. Ying, A. Franz, Minghui Liu, J. Zimányi, X. He, O. O. Omiwade, M. Heffner, Tatsuya Chujo, K. Dehmelt, H. Delagrange, Kenneth Francis Read, V. Peresedov, Jen-Chieh Peng, S. Zhou, N. N. Ajitanand, S. Batsouli, H. Masui, A. K. Dubey, A. A. Bickley, Xiong Wang, Dong Jo Kim, M. Mitrovski, James Alexander, Takahiro Nakamura, Susumu Oda, J. Egdemir, C. Silvestre, Hiroaki Ohnishi, M. B. Deaton, M. Wysocki, A. Durum, Steven E. Skutnik, Jason Kamin, S. P. Stoll, R. Averbeck, Byung-Sik Hong, David D'Enterria, S. S.E. Rosendahl, G. Bunce, A. Bazilevsky, Marisilvia Donadelli, Y. Tanaka, M. Ouchida, Philippe Rosnet, A. Churyn, V. Bumazhnov, M. P. Comets, J. Chiba, D. Jouan, Jan Rak, R. Lacey, R. Pak, N. Kamihara, K. S. Joo, V. S. Pantuev, R. Armendariz, Alexandre Lebedev, H. Qu, Andry Malala Rakotozafindrabe, A. Drees, J. Asai, R. Granier de Cassagnac, A. Adare, D. M. Lee, H. Iinuma, R. A. Soltz, J. T. Mitchell, J. Kubart, O. Dietzsch, F. Staley, L. Baksay, Hideki Hamagaki, K. Aoki, G. David, E. T. Atomssa, Shingo Sakai, H. Valle, J. E. Frantz, C. A. Ogilvie, R. Seidl, T. K. Hemmick, Yasuo Miake, Y. L. Yamaguchi, Vladislav Manko, B. Komkov, A. P.T. Palounek, L. Kochenda, H. Pei, M. Issah, M. N. Wagner, C. L. Woody, Takao Sakaguchi, Junji Tojo, M. Slunečka, Norio Saito, C. Klein-Boesing, M. D. Malik, E. Vznuzdaev, M. A. L. Leite, Eva Haslum, B. Lenzi, Julia Velkovska, Rushan Han, S. Esumi, N. Grau, D. Sharma, S. Belikov, S. Butsyk, K. Shoji, K. S. Sim, V. Dzhordzhadze, A. D. Frawley, Vladimir Samsonov, P. W. Stankus, E. J. Desmond, K. Okada, Y. Kwon, S. Afanasiev, A. Ster, T. Tabaru, A. Garishvili, V. Babintsev, Xingguo Li, M. Togawa, I. V. Sourikova, H. Hiejima, S. H. Aronson, Tae-Yeon Lee, T. L. Thomas, Tamas Ferenc Csorgo, W. A. Zajc, Martin Purschke, M. Grosse Perdekamp, B. Sahlmueller, H. En'yo, J. Park, L. Aphecetche, V. Baublis, A. Denisov, M. J. Leitch, V. Cianciolo, S. P. Sorensen, Dylan Walker, Y. Fukao, E. H. Kim, J. L. Nagle, J. Newby, C. Vale, Charles Maguire, Y. Tsuchimoto, Ryugo S. Hayano, W. Holzmann, Maya Hachiya Shimomura, K. Imai, Sergey Fokin, B. S. Chang, Y. Riabov, T. Horaguchi, Y. I. Makdisi, Christine Angela Aidala, Kiyoshi Tanida, Kenta Shigaki, M. Rosati, I. E. Yushmanov, D. Kotchetkov, J. Klay, M. Nguyen, E. Kistenev, Anne Marie Sickles, C. R. Cleven, Johannes Peter Wessels, Alexei Khanzadeev, J. G. Lajoie, A. Morreale, T. Hachiya, A. S. Nyanin, Rachid Nouicer, A. Hadj Henni, E. Stenlund, D. Hornback, Z. Fraenkel, H. A. Gustafsson, H. Sakata, K. Das, F. Matathias, C. Haegemann, Y. Inoue, H. Harada, K. Boyle, Wei Xie, M. K. Lee, M. J. Tannenbaum, C. Zhang, A. A. Vinogradov, Kensuke Homma, M. Naglis, Dong-Hun Kim, C. L. Silva, I. J. Choi, A. Kravitz, G. R. Young, A. Taranenko, E. P. Hartouni, M. Gonin, Kazushi Miki, Jiangyong Jia, D. Mukhopadhyay, P. Constantin, Y. Goto, S. Chernichenko, B. Azmoun, Viktor Riabov, A. Král, S. Rembeczki, B. Bassalleck, M. J. Kweon, K. O. Eyser, A. K. Purwar, M. Konno, T. V. Moukhanova, K. Fujiwara, Masayasu Ishihara, K. Kurita, H. Pereira, D. Winter, Y. Nakamiya, M. Oka, Susumu Sato, G. Baksay, D. Yu Peressounko, P. Tarján, A. Dion, A. Deshpande, A. Enokizono, Herve Borel, D. Lynch, Y. Watanabe, I. Younus, A. Taketani, H. W. Van Hecke, A. Soldatov, Senta Greene, D. Kawall, V. I. Kochetkov, B. E. Norman, E. O'Brien, J. Murata, A. Kiss, V. L. Rykov, T. Dahms, Gerd Joachim Kunde, I. Shein, Z. Yasin, Henner Buesching, Alberto Baldisseri, Marcus Hohlmann, S. Bathe, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, O. Zaudtke, M. Virius, S. N. White, K. Nakano, W. E. Sondheim, P. A. Rukoyatkin, John Hill, Saskia Mioduszewski, H. A. Torii, Toru Sugitate, L. D. Isenhower, A. Glenn, I. Ravinovich, François Fleuret, T. Ichihara, Osamu Jinnouchi, Matthew G. Reuter, Takahiro Fusayasu, Y. Nagata, A. Shevel, T. Hester, Alexander Malakhov, V-N. Tram, D. Silvermyr, L. S. Zolin, W. J. Park, Motoi Inaba, P. D. Barnes, A. Yanovich, R. Bennett, M. Finger, J. G. Boissevain, Masashi Kaneta, C. Pinkenburg, M. Stepanov, G. Roche, J. Gosset, S. Yokkaichi, Y. J. Mao, S. Kametani, J. H. Kang, J. S. Haggerty, A. Romana, Y. S. Lai, J. Jin, E. M. Takagui, C. P. Singh, B. M. Johnson, A. Isupov, C. Suire, J. Sziklai, Brian Cole, R. S. Towell, I. Garishvili, Akio Kiyomichi, N. Kurihara, C. Y. Chi, and J. L. Charvet
Subjects: Semileptonic decay, Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, 01 natural sciences, Upper and lower bounds, Spectral line, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: Background: Heavy-flavor production in p + p collisions is a good test of perturbative-quantum-chromodynamics (pQCD) calculations. Modification of heavy-flavor production in heavy-ion collisions relative to binary-collision scaling from p + p results, quantified with the nuclear-modification factor (R-AA), provides information on both cold-and hot-nuclear-matter effects. Midrapidity heavy-flavor R-AA measurements at the Relativistic Heavy Ion Collider have challenged parton-energy-loss models and resulted in upper limits on the viscosity-entropy ratio that are near the quantum lower bound. Such measurements have not been made in the forward-rapidity region. Purpose: Determine transverse-momentum (p(T)) spectra and the corresponding R-AA for muons from heavy-flavor meson decay in p + p and Cu + Cu collisions at root s(NN) = 200 GeV and y = 1.65. Method: Results are obtained using the semileptonic decay of heavy-flavor mesons into negative muons. The PHENIX muon-arm spectrometers measure the p(T) spectra of inclusive muon candidates. Backgrounds, primarily due to light hadrons, are determined with a Monte Carlo calculation using a set of input hadron distributions tuned to match measured-hadron distributions in the same detector and statistically subtracted. Results: The charm-production cross section in p + p collisions at root s = 200 GeV, integrated over p(T) and in the rapidity range 1.4 < y < 1.9, is found to be d(sigma e (e) over bar)/dy = 0.139 +/- 0.029 (stat)(-0.058)(+0.051) (syst) mb. This result is consistent with a perturbative fixed-order-plus-next-to-leading-log calculation within scale uncertainties and is also consistent with expectations based on the corresponding midrapidity charm-production cross section measured by PHENIX. The R-AA for heavy-flavor muons in Cu + Cu collisions is measured in three centrality bins for 1 < p(T) < 4 GeV/c. Suppression relative to binary-collision scaling (R-AA < 1) increases with centrality. Conclusions: Within experimental and theoretical uncertainties, the measured charm yield in p + p collisions is consistent with state-of-the-art pQCD calculations. Suppression in central Cu + Cu collisions suggests the presence of significant cold-nuclear-matter effects and final-state energy loss.
Published: 2012

76. Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarizedp+pcollisions ats=200 GeV

Author: L. Adamczyk, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, C. D. Anson, D. Arkhipkin, E. Aschenauer, G. S. Averichev, J. Balewski, A. Banerjee, Z. Barnovska, D. R. Beavis, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, A. V. Brandin, A. Bridgeman, S. G. Brovko, E. Bruna, S. Bueltmann, I. Bunzarov, T. P. Burton, J. Butterworth, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, P. Chung, J. Chwastowski, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, X. Cui, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, R. Derradi de Souza, S. Dhamija, L. Didenko, F. Ding, A. Dion, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, L. E. Dunkelberger, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, L. Eun, O. Evdokimov, R. Fatemi, S. Fazio, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, Y. Fisyak, C. A. Gagliardi, D. R. Gangadharan, F. Geurts, S. Gliske, Y. N. Gorbunov, O. G. Grebenyuk, D. Grosnick, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, J. W. Harris, J. P. Hays-Wehle, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, S. Horvat, B. Huang, H. Z. Huang, P. Huck, T. J. Humanic, L. Huo, G. Igo, W. W. Jacobs, C. Jena, J. Joseph, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, A. Kesich, D. Kettler, D. P. Kikola, J. Kiryluk, A. Kisiel, V. Kizka, S. R. Klein, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. Koroleva, W. Korsch, L. Kotchenda, K. Kowalik, P. Kravtsov, K. Krueger, L. Kumar, M. A. C. Lamont, J. M. Landgraf, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, L. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, X. Luo, A. Luszczak, G. L. Ma, Y. G. Ma, D. M. M. D. Madagodagettige Don, D. P. Mahapatra, R. Majka, O. I. Mall, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, J. Millane, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, B. Morozov, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, Md. Nasim, T. K. Nayak, L. V. Nogach, J. Novak, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, P. Ostrowski, M. Pachr, B. S. Page, S. K. Pal, Y. X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, W. Peryt, P. Pile, M. Planinic, J. Pluta, D. Plyku, N. Poljak, J. Porter, A. M. Poskanzer, C. B. Powell, D. Prindle, C. Pruneau, N. K. Pruthi, M. Przybycien, P. R. Pujahari, J. Putschke, H. Qiu, R. Raniwala, S. Raniwala, R. L. Ray, R. Redwine, R. Reed, C. K. Riley, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, J. F. Ross, L. Ruan, J. Rusnak, N. R. Sahoo, I. Sakrejda, T. Sakuma, S. Salur, A. Sandacz, J. Sandweiss, E. Sangaline, A. Sarkar, M. Sarsour, J. Schambach, R. P. Scharenberg, A. M. Schmah, B. Schmidke, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, B. Sharma, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, R. N. Singaraju, M. J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, D. Staszak, S. G. Steadman, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, D. Thein, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, T. A. Trainor, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, J. Turnau, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, A. Vossen, M. Wada, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, W. Witzke, Y. F. Wu, Z. Xiao, W. Xie, K. Xin, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, Y. Yi, K. Yip, I-K. Yoo, M. Zawisza, H. Zbroszczyk, J. B. Zhang, S. Zhang, W. M. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, and Y. Zoulkarneeva
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, media_common.quotation_subject, Sigma, Polarization (waves), 01 natural sciences, Asymmetry, Gluon, Nuclear physics, Transverse plane, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Nucleon, Relativistic Heavy Ion Collider, media_common
Abstract: We report STAR measurements of the longitudinal double-spin asymmetry A_LL, the transverse single-spin asymmetry A_N, and the transverse double-spin asymmetries A_Sigma and A_TT for inclusive jet production at mid-rapidity in polarized p+p collisions at a center-of-mass energy of sqrt{s} = 200 GeV. The data represent integrated luminosities of 7.6 /pb with longitudinal polarization and 1.8 /pb with transverse polarization, with 50-55% beam polarization, and were recorded in 2005 and 2006. No evidence is found for the existence of statistically significant jet A_N, A_Sigma, or A_TT at mid-rapidity. Recent model calculations indicate the A_N results may provide new limits on the gluon Sivers distribution in the proton. The asymmetry A_LL significantly improves the knowledge of gluon polarization in the nucleon.
Published: 2012

77. Di-electron spectrum at mid-rapidity inp+pcollisions ats=200GeV

Author: L. Adamczyk, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, C. D. Anson, D. Arkhipkin, E. Aschenauer, G. S. Averichev, J. Balewski, A. Banerjee, Z. Barnovska, D. R. Beavis, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, A. V. Brandin, S. G. Brovko, E. Bruna, S. Bueltmann, I. Bunzarov, T. P. Burton, J. Butterworth, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, Z. Chang, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, W. Christie, P. Chung, J. Chwastowski, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, X. Cui, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, R. Derradi de Souza, S. Dhamija, L. Didenko, F. Ding, A. Dion, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, L. E. Dunkelberger, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, L. Eun, O. Evdokimov, R. Fatemi, S. Fazio, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, Y. Fisyak, C. A. Gagliardi, D. R. Gangadharan, F. Geurts, A. Gibson, S. Gliske, Y. N. Gorbunov, O. G. Grebenyuk, D. Grosnick, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, J. W. Harris, J. P. Hays-Wehle, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, S. Horvat, B. Huang, H. Z. Huang, P. Huck, T. J. Humanic, L. Huo, G. Igo, W. W. Jacobs, C. Jena, J. Joseph, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, A. Kesich, D. Kettler, D. P. Kikola, J. Kiryluk, A. Kisiel, V. Kizka, S. R. Klein, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. Koroleva, W. Korsch, L. Kotchenda, P. Kravtsov, K. Krueger, L. Kumar, M. A. C. Lamont, J. M. Landgraf, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, L. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, X. Luo, A. Luszczak, G. L. Ma, Y. G. Ma, D. M. M. D. Madagodagettige Don, D. P. Mahapatra, R. Majka, O. I. Mall, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, B. Morozov, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, Md. Nasim, T. K. Nayak, L. V. Nogach, J. Novak, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, P. Ostrowski, M. Pachr, B. S. Page, S. K. Pal, Y. X. Pan, Y. Pandit, Y. Panebratsev, T. Pawlak, B. Pawlik, H. Pei, C. Perkins, W. Peryt, P. Pile, M. Planinic, J. Pluta, D. Plyku, N. Poljak, J. Porter, A. M. Poskanzer, C. B. Powell, D. Prindle, C. Pruneau, N. K. Pruthi, M. Przybycien, P. R. Pujahari, J. Putschke, H. Qiu, R. Raniwala, S. Raniwala, R. L. Ray, R. Redwine, R. Reed, C. K. Riley, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, J. F. Ross, L. Ruan, J. Rusnak, N. R. Sahoo, I. Sakrejda, S. Salur, A. Sandacz, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, A. M. Schmah, B. Schmidke, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, B. Sharma, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, R. N. Singaraju, M. J. Skoby, D. Smirnov, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, S. G. Steadman, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, D. Thein, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, T. A. Trainor, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, J. Turnau, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, A. Vossen, M. Wada, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, W. Witzke, Y. F. Wu, Z. Xiao, W. Xie, K. Xin, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, Y. Yi, K. Yip, I-K. Yoo, M. Zawisza, H. Zbroszczyk, J. B. Zhang, S. Zhang, W. M. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, and Y. Zoulkarneeva
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, High Energy Physics::Phenomenology, 01 natural sciences, 7. Clean energy, Omega, Particle identification, Nuclear physics, Pseudoscalar, 0103 physical sciences, Mass spectrum, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: We report on the mid-rapidity mass spectrum of di-electrons and cross sections of pseudoscalar and vector mesons via e(+) e(-) decays, from root s = 200 GeV p + p collisions, measured by the large-acceptance experiment STAR at the Relativistic Heavy Ion Collider. The ratio of the di-electron continuum to the combinatorial background is larger than 10% over the entire mass range. Simulations of di-electrons from light-meson decays and heavy-flavor decays (charmonium and open charm correlation) are found to describe the data. The extracted omega -> e(+) e(-) invariant yields are consistent with previous measurements. The mid-rapidity yields (dN/dy) of phi and J/psi are extracted through their di-electron decay channels and are consistent with the previous measurements of phi -> K+ K- and J/psi -> e(+) e(-). Our results suggest a new upper limit of the branching ratio of the eta -> e(+) e(-) of 1.7 x 10(-5) at the 90% confidence level.
Published: 2012

78. Energy and system-size dependence of two- and four-particlev2measurements in heavy-ion collisions atsNN=62.4and 200 GeV and their implications on flow fluctuations and nonflow

Author: G. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, C. D. Anson, D. Arkhipkin, G. S. Averichev, J. Balewski, D. R. Beavis, N. K. Behera, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, E. Braidot, A. V. Brandin, A. Bridgeman, S. G. Brovko, E. Bruna, S. Bueltmann, I. Bunzarov, T. P. Burton, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, K. E. Choi, W. Christie, P. Chung, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, X. Cui, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, A. A. Derevschikov, R. Derradi de Souza, L. Didenko, P. Djawotho, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, M. Estienne, L. Eun, O. Evdokimov, R. Fatemi, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, V. Fine, Y. Fisyak, C. A. Gagliardi, D. R. Gangadharan, F. Geurts, P. Ghosh, Y. N. Gorbunov, A. Gordon, O. G. Grebenyuk, D. Grosnick, A. Gupta, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, J. W. Harris, J. P. Hays-Wehle, M. Heinz, S. Heppelmann, A. Hirsch, G. W. Hoffmann, D. J. Hofman, B. Huang, H. Z. Huang, T. J. Humanic, L. Huo, G. Igo, W. W. Jacobs, C. Jena, F. Jin, J. Joseph, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, D. Kettler, D. P. Kikola, J. Kiryluk, A. Kisiel, V. Kizka, S. R. Klein, A. G. Knospe, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. Koroleva, W. Korsch, L. Kotchenda, V. Kouchpil, P. Kravtsov, K. Krueger, M. Krus, L. Kumar, M. A. C. Lamont, J. M. Landgraf, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, L. Li, N. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, H. Liu, J. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, E. V. Lukashov, X. Luo, G. L. Ma, Y. G. Ma, D. P. Mahapatra, R. Majka, O. I. Mall, R. Manweiler, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, A. Meschanin, R. Milner, N. G. Minaev, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, B. Morozov, D. A. Morozov, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, T. K. Nayak, L. V. Nogach, S. B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, M. Pachr, B. S. Page, S. K. Pal, Y. Pandit, Y. Panebratsev, T. Pawlak, H. Pei, T. Peitzmann, C. Perkins, W. Peryt, P. Pile, M. Planinic, J. Pluta, D. Plyku, N. Poljak, J. Porter, A. M. Poskanzer, C. B. Powell, D. Prindle, C. Pruneau, N. K. Pruthi, P. R. Pujahari, J. Putschke, H. Qiu, R. Raniwala, S. Raniwala, R. Redwine, R. Reed, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, L. Ruan, J. Rusnak, N. R. Sahoo, I. Sakrejda, S. Salur, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, J. Schaub, A. M. Schmah, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, I. Selyuzhenkov, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, B. Sharma, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, F. Simon, R. N. Singaraju, M. J. Skoby, N. Smirnov, D. Solanki, P. Sorensen, U. G. de Souza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, S. G. Steadman, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, N. L. Subba, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, D. Thein, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, A. N. Vasiliev, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, M. Wada, M. Walker, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, W. Witzke, Y. F. Wu, Z. Xiao, W. Xie, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, K. Yip, I-K. Yoo, M. Zawisza, H. Zbroszczyk, W. Zhan, J. B. Zhang, S. Zhang, W. M. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, and Y. Zoulkarneeva
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, media_common.quotation_subject, Star (game theory), Elliptic flow, 01 natural sciences, Azimuth, Nuclear physics, 0103 physical sciences, Particle, Eccentricity (behavior), 010306 general physics, Anisotropy, Cumulant, Energy (signal processing), media_common
Abstract: We present STAR measurements of azimuthal anisotropy by means of the two- and four-particle cumulants v2 (v2{; ; 2}; ; and v2{; ; 4}; ; ) for Au+Au and Cu+Cu collisions at center-of-mass energies √sNN=62.4 and 200 GeV. The difference between v2{; ; 2}; ; 2 and v2{; ; 4}; ; 2 is related to v2 fluctuations (σv2) and nonflow (δ2). We present an upper limit to σv2/v2. Following the assumption that eccentricity fluctuations σɛ dominate v2 fluctuations σv2/v2≈σɛ/ɛ we deduce the nonflow implied for several models of eccentricity fluctuations that would be required for consistency with v2{; ; 2}; ; and v2{; ; 4}; ; . We also present results on the ratio of v2 to eccentricity.
Published: 2012

79. Deviation from quark number scaling of the anisotropy parameterv2of pions, kaons, and protons inAu+Aucollisions atsNN=200GeV

Author: J. P. Wood, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, Beomkyu Kim, Wei Xie, O. Drapier, Frank Ellinghaus, E. R. Kinney, Jongmin Lee, D. P. Morrison, S. Campbell, Tatsuya Chujo, K. N. Barish, A. Taketani, D. S. Jumper, H. Pei, T. Dahms, H. A. Gustafsson, M. I. Nagy, P. Tarján, D. Watanabe, M. D. Malik, E. Vznuzdaev, S. Dairaku, S. N. White, C. Zhang, Jen-Chieh Peng, P. Ružička, A. Deshpande, S. Sano, Inkyu Park, Xiong Wang, Dong Jo Kim, M. Ouchida, Sung Keun Park, M. Virius, Viktor Riabov, N. Means, K. B. Lee, N. N. Ajitanand, S. V. Afanasiev, Charles Maguire, C. Silvestre, M. L. Brooks, X. He, C. H. Chen, A. Veicht, Maya Hachiya Shimomura, Johannes Peter Wessels, O. Dietzsch, Y. Aramaki, E. T. Atomssa, B. Azmoun, Y. J. Mao, A. Král, Takahiro Nakamura, Senta Greene, A. Glenn, I. Ravinovich, V. Peresedov, H. Valle, A. T. Basye, E. Kistenev, J. Koster, I. Tserruya, J. H. Kang, M. Wysocki, J. S. Haggerty, Masamichi Ishihara, Y. Watanabe, Susumu Oda, M. Bai, Dipanwita Dutta, D. Roach, W. A. Zajc, Alexei Khanzadeev, Yu. Efremenko, V. Singh, K. A. Drees, I. Younus, Y. J. Kwon, K. M. Kijima, C. L. Woody, H. Masui, A. A. Bickley, V. Baublis, A. Denisov, V. Cianciolo, A. Berdnikov, S. Tarafdar, Julia Velkovska, M. Rosati, Sergey Fokin, E. Stenlund, A. Durum, Y. I. Makdisi, Zhiying You, R. Bennett, Xingguo Li, B. Komkov, Eva Haslum, B. Lenzi, M. Kawashima, B. Fadem, E. O'Brien, M. Kurosawa, C. M. Camacho, Prashant Shukla, S. F. Pate, D. Kawall, B. Love, K. Yamaura, H. Themann, Minghui Liu, R. A. Soltz, M. Grosse Perdekamp, M. E. Connors, A. A. Vinogradov, Y. Tanaka, Norio Saito, E. Mannel, M. Finger, S. P. Sorensen, M. A. L. Leite, H. Al-Bataineh, Y. S. Lai, I. V. Sourikova, M. Heffner, Kenneth Francis Read, T. Ichihara, Jiangyong Jia, Y. Goto, O. Chvala, M. Oka, Hongfang Liu, M. J. Tannenbaum, T. L. Thomas, Seong H. Kim, Y. Ikeda, A. G. Litvinenko, D. E. Fields, J. Newby, B. V. Jacak, Eunja Kim, D. Kotchetkov, K. S. Lee, A. Dion, A. V. Kazantsev, J. G. Lajoie, K. Das, T. Kempel, Dong-Hun Kim, K. Tanida, V. Papavassiliou, Gerd Joachim Kunde, E. P. Hartouni, A. Kozlov, I. Shein, H. Torii, Ryugo S. Hayano, R. Belmont, R. Seto, J. S. Kapustinsky, L. Baksay, I. J. Choi, A. Kravitz, M. McCumber, Peter Christiansen, V. Babintsev, T. V. Moukhanova, A. Enokizono, M. Gonin, C. Pinkenburg, Y. Riabov, L. Tomášek, D. Hornback, V. S. Pantuev, P. Liebing, I. Danchev, D. Winter, G. S. Kyle, D. Yu Peressounko, P. Mikeš, Kenta Shigaki, K. S. Joo, Marisilvia Donadelli, V. Bumazhnov, James Alexander, K. Sedgwick, R. Tanabe, Rushan Han, G. Roche, J. Jin, A. Sukhanov, K. Kurita, H. Pereira, M. Nguyen, A. Taranenko, E. M. Takagui, E. J. Desmond, J. Hanks, R. Averbeck, Byung-Sik Hong, M. Togawa, J. Hamblen, E. Vazquez-Zambrano, A. Yu. Semenov, S. Sawada, A. Bazilevsky, A. S. Nyanin, Kazushi Miki, Y. Morino, Alice Mignerey, Rachid Nouicer, J. Ying, A. Franz, M. Proissl, Brajesh K. Singh, H. Qu, J. Park, Philippe Rosnet, A. Rakotozafindrabe, Alexandre Lebedev, T. C. Awes, C. Baumann, Kyoichiro Ozawa, T. Liška, J. S. Bok, Hideki Hamagaki, K. Aoki, G. David, Y. Tsuchimoto, S. Kametani, M. Naglis, C. L. Silva, K. Okada, R. Pak, S. Esumi, B. Sahlmueller, Takao Sakaguchi, Tadaaki Isobe, K. I. Hahn, D. M. Lee, D. Sharma, H. En'yo, R. Ichimiya, M. J. Leitch, I. E. Yushmanov, A. D. Frawley, M. Slunečka, P. L. McGaughey, K. Kiriluk, Eun-Hee Kim, C. P. Singh, R. Vértesi, Vladimir Samsonov, Martin Purschke, K. Watanabe, B. M. Johnson, S. Huang, S. Yokkaichi, K. Shoji, W. Holzmann, A. Isupov, T. Horaguchi, P. W. Stankus, J. Sziklai, A. Morreale, K. Karatsu, Z. Fraenkel, R. K. Choudhury, Brian Cole, R. S. Towell, J. E. Frantz, J. Murata, I. Garishvili, F. Wei, Kyeongpil Lee, J. Ide, Tamas Ferenc Csorgo, C. Y. Chi, J. L. Nagle, Anne Marie Sickles, G. R. Young, K. S. Sim, P. Chung, R. Yang, A. Datta, K. Imai, Taku Gunji, H. Gong, J. Seele, F. Kajihara, Y. Onuki, Jan Rak, R. Lacey, R. Granier de Cassagnac, A. Adare, S. Butsyk, S. Zhou, S. D. Rolnick, Ajit Kumar Mohanty, T. A. Shibata, T. Sato, D. Isenhower, A. Toia, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, B. Bassalleck, M. Konno, R. P. Pisani, J. T. Mitchell, Y. Fukao, R. Seidl, Vladislav Manko, T. Hester, S. Belikov, N. A. Sparks, N. Grau, C. Vale, Christine Angela Aidala, Y. Nakamiya, D. Lynch, Motoi Inaba, R. M. Wright, G. Baksay, Y. J. Kim, A. Kiss, Henner Buesching, Steve Edwards, Marcus Hohlmann, L. A. Linden Levy, K. Sakashita, A. K. Purwar, K. Fujiwara, Y. L. Yamaguchi, E. Leitner, H. W. Van Hecke, S. Bathe, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, Jason Kamin, M. Csanad, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, D. Jouan, N. Kamihara, A. Drees, M. Chiu, C. A. Ogilvie, T. K. Hemmick, J. M. Durham, Yasuo Miake, L. Kochenda, M. Issah, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, Takahiro Fusayasu, Alexander Malakhov, D. Silvermyr, L. S. Zolin, W. J. Park, Christopher Rosen, A. Yanovich, B. Meredith, John Hill, Toru Sugitate, and François Fleuret
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Kinetic energy, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Impact parameter, Nuclear Experiment, 010306 general physics, Anisotropy, Relativistic Heavy Ion Collider, Scaling
Abstract: Measurements of the anisotropy parameter v(2) of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum p(T), and transverse kinetic energy KET at midrapidity (vertical bar eta vertical bar < 0.35) in Au + Au collisions at root s(N N) = 200 GeV are presented. Pions and protons are identified up to p(T) = 6 GeV/c, and kaons up to p(T) = 4 GeV/c, by combining information from time-of-flight and aerogel Cerenkov detectors in the PHENIX Experiment. The scaling of v(2) with the number of valence quarks (n(q)) has been studied in different centrality bins as a function of transverse momentum and transverse kinetic energy. A deviation from previously observed quark-number scaling is observed at large values of KET/n(q) in noncentral Au + Au collisions (20-60%), but this scaling remains valid in central collisions (0-10%).
Published: 2012

80. Measurement of direct photons in Au+Au collisions at √(s(NN))=200 GeV

Author: S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, A, Al-Jamel, J, Alexander, K, Aoki, L, Aphecetche, R, Armendariz, S H, Aronson, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, A, Baldisseri, K N, Barish, P D, Barnes, B, Bassalleck, S, Bathe, S, Batsouli, V, Baublis, F, Bauer, A, Bazilevsky, S, Belikov, R, Bennett, Y, Berdnikov, M T, Bjorndal, J G, Boissevain, H, Borel, K, Boyle, M L, Brooks, D S, Brown, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J M, Burward-Hoy, S, Butsyk, S, Campbell, J-S, Chai, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, I J, Choi, T, Chujo, V, Cianciolo, C R, Cleven, Y, Cobigo, B A, Cole, M P, Comets, M, Connors, P, Constantin, M, Csanád, T, Csörgő, T, Dahms, K, Das, G, David, H, Delagrange, A, Denisov, D, d'Enterria, A, Deshpande, E J, Desmond, O, Dietzsch, A, Dion, J L, Drachenberg, O, Drapier, A, Drees, A K, Dubey, A, Durum, V, Dzhordzhadze, Y V, Efremenko, J, Egdemir, A, Enokizono, H, En'yo, B, Espagnon, S, Esumi, D E, Fields, F, Fleuret, S L, Fokin, B, Forestier, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, Y, Fukao, S-Y, Fung, S, Gadrat, F, Gastineau, M, Germain, A, Glenn, M, Gonin, J, Gosset, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, T, Hachiya, A, Hadj Henni, J S, Haggerty, M N, Hagiwara, H, Hamagaki, H, Harada, E P, Hartouni, K, Haruna, M, Harvey, E, Haslum, K, Hasuko, R, Hayano, X, He, M, Heffner, T K, Hemmick, J M, Heuser, H, Hiejima, J C, Hill, R, Hobbs, M, Holmes, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, M G, Hur, T, Ichihara, H, Iinuma, K, Imai, J, Imrek, M, Inaba, D, Isenhower, L, Isenhower, M, Ishihara, T, Isobe, M, Issah, A, Isupov, B V, Jacak, J, Jia, J, Jin, O, Jinnouchi, B M, Johnson, K S, Joo, D, Jouan, F, Kajihara, S, Kametani, N, Kamihara, M, Kaneta, J H, Kang, T, Kawagishi, A V, Kazantsev, S, Kelly, A, Khanzadeev, D J, Kim, E, Kim, Y-S, Kim, E, Kinney, A, Kiss, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, L, Kochenda, V, Kochetkov, B, Komkov, M, Konno, D, Kotchetkov, A, Kozlov, P J, Kroon, G J, Kunde, N, Kurihara, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, A, Lebedev, Y, Le Bornec, S, Leckey, D M, Lee, M K, Lee, M J, Leitch, M A L, Leite, X H, Li, H, Lim, A, Litvinenko, M X, Liu, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, H, Masui, F, Matathias, M C, McCain, P L, McGaughey, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, G C, Mishra, J T, Mitchell, D P, Morrison, J M, Moss, T V, Moukhanova, D, Mukhopadhyay, J, Murata, S, Nagamiya, Y, Nagata, J L, Nagle, M, Naglis, T, Nakamura, J, Newby, M, Nguyen, B E, Norman, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, K, Okada, O O, Omiwade, A, Oskarsson, I, Otterlund, K, Ozawa, R, Pak, D, Pal, A P T, Palounek, V, Pantuev, V, Papavassiliou, J, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, C, Pinkenburg, R P, Pisani, M L, Purschke, A K, Purwar, H, Qu, J, Rak, I, Ravinovich, K F, Read, M, Reuter, K, Reygers, V, Riabov, Y, Riabov, G, Roche, A, Romana, M, Rosati, S S E, Rosendahl, P, Rosnet, P, Rukoyatkin, V L, Rykov, S S, Ryu, B, Sahlmueller, N, Saito, T, Sakaguchi, S, Sakai, V, Samsonov, H D, Sato, S, Sato, S, Sawada, V, Semenov, R, Seto, D, Sharma, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, T, Shohjoh, K, Shoji, A, Sickles, C L, Silva, D, Silvermyr, K S, Sim, C P, Singh, V, Singh, S, Skutnik, W C, Smith, A, Soldatov, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, F, Staley, P W, Stankus, E, Stenlund, M, Stepanov, A, Ster, S P, Stoll, T, Sugitate, C, Suire, J P, Sullivan, J, Sziklai, T, Tabaru, S, Takagi, E M, Takagui, A, Taketani, K H, Tanaka, Y, Tanaka, K, Tanida, M J, Tannenbaum, A, Taranenko, P, Tarján, T L, Thomas, M, Togawa, J, Tojo, H, Torii, R S, Towell, V-N, Tram, I, Tserruya, Y, Tsuchimoto, S K, Tuli, H, Tydesjö, N, Tyurin, C, Vale, H, Valle, H W, van Hecke, J, Velkovska, R, Vértesi, A A, Vinogradov, E, Vznuzdaev, M, Wagner, X R, Wang, Y, Watanabe, J, Wessels, S N, White, N, Willis, D, Winter, C L, Woody, M, Wysocki, W, Xie, A, Yanovich, S, Yokkaichi, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, O, Zaudtke, C, Zhang, J, Zimányi, and L, Zolin
Abstract: We report the measurement of direct photons at midrapidity in Au+Au collisions at √(s(NN))=200 GeV. The direct photon signal was extracted for the transverse momentum range of 4 GeV/cp(T)22 GeV/c, using a statistical method to subtract decay photons from the inclusive photon sample. The direct photon nuclear modification factor R(AA) was calculated as a function of p(T) for different Au+Au collision centralities using the measured p+p direct photon spectrum and compared to theoretical predictions. R(AA) was found to be consistent with unity for all centralities over the entire measured p(T) range. Theoretical models that account for modifications of initial direct photon production due to modified parton distribution functions in Au and the different isospin composition of the nuclei predict a modest change of R(AA) from unity. They are consistent with the data. Models with compensating effects of the quark-gluon plasma on high-energy photons, such as suppression of jet-fragmentation photons and induced-photon bremsstrahlung from partons traversing the medium, are also consistent with this measurement.
Published: 2012

81. Measurement of theW→eνandZ/γ*→e+e−production cross sections at mid-rapidity in proton-proton collisions ats=500 GeV

Author: P. Chung, Wei Xie, J. Joseph, G. M.S. Vasconcelos, Y. Pandit, N. Schmitz, E. Shahaliev, J. W. Harris, J. L. Drachenberg, H. Bichsel, G. Odyniec, Y. Zoulkarneeva, C. Zhong, Y. F. Wu, Olga Evdokimov, Barbara Antonina Trzeciak, Q. Wang, N. R. Sahoo, T. R. Schuster, P. Yepes, A. Davila Leyva, A. H. Tang, D. R. Gangadharan, S. K. Gupta, J. L. Romero, E. Finch, C-Q. Li, I. Bunzarov, Jay Roberts, O. I. Mall, R. P. Scharenberg, Christina Markert, M. A.C. Lamont, L-X. Han, P. Huck, D. Smirnov, H. W. Ke, H. S. Matis, Anthony Robert Timmins, X. Li, Adam Ryszard Kisiel, J. Engelage, A. Luszczak, H. J. Crawford, Y. Yi, J. Rusnak, C. A. Whitten, L. Ruan, Marcelo Gameiro Munhoz, D. J. Prindle, W. W. Jacobs, J. Lauret, L. Li, J. Seele, J. M. Landgraf, Y. A. Pan, P. Seyboth, J. G. Cramer, R. Corliss, Russell Richard Betts, R. Lednicky, T. Tarnowsky, Leszek Adamczyk, J. C. Dunlop, D. G. Underwood, R. Derradi de Souza, M. Strikhanov, P. Djawotho, J. Konzer, B. Haag, A. M. Poskanzer, Zubayer Ahammed, M. J. LeVine, I. G. Alekseev, Donika Plyku, P. R. Pujahari, C. B. Powell, H. Z. Huang, S. Vokal, M. J. M. Codrington, M. Calderon De La Barca Sanchez, F. Liu, Mariusz Przybycien, A. Kechechyan, R. Cendejas, J. Cheng, T. J. M. Symons, M. A. Lisa, Xiaofeng Luo, Zebo Tang, L. Kotchenda, Guo-Liang Ma, E. W. Oldag, William Axel Leight, D. Thein, L. C. De Silva, Janusz Chwastowski, T. S. McShane, Jongmin Lee, R. L. Ray, J. Putschke, J. Kiryluk, J. H. Chen, Xiangming Sun, G. Wang, H. Qiu, M. Tokarev, T. Ljubicic, H. Caines, Sudhir Raniwala, S. R. Klein, Q. Y. Shou, Z. P. Zhang, A. S. Hirsch, P. Kravtsov, A. M. Schmah, S. Dhamija, C. Perkins, R. D. Majka, J. Y. Chen, W. Borowski, J. Turnau, B. D. Anderson, L. E. Dunkelberger, D. L. Olson, Q. H. Xu, X. L. Wang, E. C. Aschenauer, S. Margetis, Thorsten Sven Kollegger, Z. J. Sun, N. K. Pruthi, X. Dong, J. Schambach, T. G. Dedovich, G. Eppley, J. Pluta, S. K. Pal, Justin Stevens, Y. J. Sun, T. D. S. Stanislaus, M. K. Mustafa, W. Li, B. Huang, Rene Bellwied, S. Heppelmann, Y. H. Zhu, L. M. Lima, E. P. Sichtermann, S. Kabana, Y. P. Viyogi, Y. Li, R. E. Tribble, Jize Zhao, Gerald W Hoffmann, M. Shao, G. Van Buren, H. H. Wieman, J. Balewski, Rashmi Raniwala, R. Fatemi, Michael Joseph Betancourt, R. N. Singaraju, L. Huo, Claude Andre Pruneau, T. J. Humanic, D. P. Mahapatra, K. Krueger, L. Eun, S. S. Shi, C. D. Anson, J. A. Vanfossen, T. Ullrich, J. B. Zhang, P. Ostrowski, J. E. Draper, C. M. Du, H. S. Xu, Bedangadas Mohanty, M. Cherney, Zhigang Xiao, R. Varma, James Prewitt Hays-Wehle, Lokesh Kumar, M. Sharma, B. S. Page, Xiangyuan Cui, W. Christie, D. P. Kikola, H. Pei, S. Bueltmann, B. Stringfellow, R. G. Fersch, W. M. Zhang, Li-Yi Chen, B. Morozov, Xuan Zhang, Janet Elizabeth Seger, I. Koralt, A. Dion, M. Wada, N. Xu, P. Filip, R. S. Longacre, Y. G. Ma, W. Peryt, Elena Bruna, A. K. Bhati, L. V. Nogach, Anju Bhasin, D. Keane, W. Xu, R. P. Redwine, Hanna Paulina Zbroszczyk, K. Kang, Jian Deng, G. Van Nieuwenhuizen, Nikolai Smirnov, R. Stock, Wolfgang Korsch, P. Pile, G. D. Westfall, A. Lebedev, L. G. Efimov, M. Zawisza, H. M. Spinka, F. Videbæk, G. Igo, G. Agakishiev, D. R. Beavis, T. K. Nayak, G. Webb, B. Sharma, Sukalyan Chattopadhyay, J. Bouchet, Xiaofeng Zhu, A. Banerjee, F. Ding, I. K. Yoo, D. Cebra, K. Kauder, J. Porter, J. Butterworth, Y. Panebratsev, F. Zhao, D. Grosnick, Chitrasen Jena, A. Ogawa, Y. P. Lu, L. H. Tarini, H. F. Chen, Thomas A. Trainor, E. G. Judd, L. Koroleva, Z. Barnovska, W. J. Llope, Jaroslav Bielcik, D. Tlusty, I. G. Bordyuzhin, Mirko Planinic, Michal Sumbera, R. A.N. Oliveira, C. K. Riley, A. A. P. Suaide, Rolf K. Reed, Y. N. Gorbunov, O. Hajkova, S. W. Wissink, Y. Zhang, O. V. Rogachevskiy, Nikola Poljak, J. Alford, A. Ohlson, O. D. Tsai, D. D. Koetke, M. Elnimr, L. Xue, V. A. Kizka, J. H. Thomas, S. Fazio, W. Guryn, M. C. Cervantes, Y. Fisyak, U. G. Desouza, K. Oh, O. G. Grebenyuk, J. Fedorisin, Zhiming Li, D. Kettler, Sevil Salur, G. S. Averichev, Haiyan Wang, S. Horvat, A. Szanto de Toledo, J. Kapitan, M. K. Mitrovski, X. Z. Cai, M. J. Skoby, Frank Jm Geurts, J. C. Webb, Jifa Tian, R. Witt, T. Pawlak, W. Witzke, Y. Mohammed, A. V. Alakhverdyants, S. H. Zhang, S. Mioduszewski, A. Sarkar, David Jonathan Hofman, H. Masui, Donald M. McDonald, Prithwish Tribedy, B. K. Srivastava, K. Yip, J. S. Wang, R. R. Debbe, Sergey Voloshin, J. Takahashi, Jana Bielcikova, S. G. Steadman, P. Sorensen, Y. Wang, B. Pawlik, M. Naglis, L. Didenko, A. V. Brandin, Basanta Kumar Nandi, K. Xin, A. Kesich, J. Sandweiss, D. Solanki, B. Schmidke, I. Sakrejda, Y. Yang, S. LaPointe, Nilay Shah, T. P. Burton, Y. Xu, P. Chaloupka, Z. J. Xu, S. Trentalange, A. Chikanian, Vitaly Okorokov, Bernd Surrow, E. Sangaline, D. Arkhipkin, A. Hamed, C. A. Gagliardi, M. Pachr, Madan M. Aggarwal, Fuqiang Wang, A. Vossen, L. C. Bland, A. Sandacz, S. G. Brovko, M. C. Suarez, D. N. Svirida, Stephen V. Gliske, H. G. Ritter, and Nasim
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Proton, 010308 nuclear & particles physics, Parton, Electron, 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, Rapidity, 010306 general physics, Relativistic Heavy Ion Collider, STAR detector, Lepton, Boson
Abstract: We report measurements of the charge-separated W+(-)→e+(- )+νe(ν e) and Z/γ*→e+e- production cross sections at mid-rapidity in proton-proton collisions at √s=500 GeV. These results are based on 13.2 pb-1 of data recorded in 2009 by the STAR detector at RHIC. Production cross sections for W bosons that decay via the eν channel were measured to be σ(pp→W+X)·BR(W+→e+νe)=117.3±5.9(stat)±6.2(syst)±15.2(lumi) pb, and σ(pp→W-X)·BR(W-→e-ν e)=43.3±4.6(stat)± 3.4(syst) ±5.6(lumi) pb. For Z/γ* production, σ(pp→Z/γ*X)·BR(Z/γ*→e+e- )=7.7±2.1(stat)-0.9+0.5(syst)±1.0(lumi) pb was measured for di- lepton invariant masses me+e- between 70 and 110 GeV/c2. First measurements of the W cross section ratio, σ(pp→W+X)/σ(pp→W- X), at √s=500 GeV are also reported. Theoretical predictions, calculated using recent parton distribution functions, are found to agree with the measured cross sections.
Published: 2012

82. Directed Flow of Identified Particles inAu+AuCollisions atSNN=200 GeVat RHIC

Author: M. Tokarev, T. D. S. Stanislaus, H. H. Wieman, Nasim, A. M. Poskanzer, B. Haag, A. Kechechyan, R. Cendejas, E. P. Sichtermann, L. Kotchenda, R. S. Longacre, David Jonathan Hofman, Russell Richard Betts, J. Balewski, J. L. Drachenberg, Vitaly Okorokov, Bernd Surrow, H. Z. Huang, S. Vokal, D. Tlusty, I. G. Bordyuzhin, Mirko Planinic, Rashmi Raniwala, Claude Andre Pruneau, F. Videbæk, S. K. Gupta, H. Masui, G. Webb, Sergey Voloshin, Xiangming Sun, P. Chung, Wei Xie, M. Calderon De La Barca Sanchez, J. Joseph, J. Takahashi, G. Igo, Zebo Tang, Janusz Chwastowski, D. G. Underwood, J. Putschke, T. Ullrich, G. Wang, Sukalyan Chattopadhyay, G. M.S. Vasconcelos, Y. N. Gorbunov, Y. Wang, O. Hajkova, C. A. Gagliardi, T. S. McShane, Olga Evdokimov, Barbara Antonina Trzeciak, J. Kiryluk, J. H. Chen, P. Huck, A. Chikanian, I. K. Yoo, Stephen V. Gliske, B. Sharma, J. Bouchet, C. M. Du, B. Huang, M. Pachr, Y. Pandit, W. J. Llope, K. Kauder, S. Dhamija, H. S. Xu, N. Schmitz, Jay Roberts, D. R. Gangadharan, William Axel Leight, Chitrasen Jena, Thorsten Sven Kollegger, E. Shahaliev, J. Butterworth, K. Yip, N. Xu, Anthony Robert Timmins, Adam Ryszard Kisiel, H. Pei, C. Perkins, J. Cheng, T. J. M. Symons, Z. J. Sun, Y. P. Lu, J. S. Wang, S. Heppelmann, W. Xu, Jaroslav Bielcik, Wolfgang Korsch, Haiyan Wang, H. J. Crawford, S. R. Klein, L. E. Dunkelberger, P. Filip, L. C. De Silva, D. L. Olson, B. D. Anderson, P. R. Pujahari, C. B. Powell, M. K. Mustafa, L. Eun, H. W. Ke, R. R. Debbe, J. B. Zhang, J. E. Draper, J. Porter, R. Fatemi, Michael Joseph Betancourt, E. G. Judd, Y. F. Wu, I. Koralt, O. V. Rogachevskiy, Q. H. Xu, X. Z. Cai, Xiaofeng Zhu, K. Krueger, Y. Li, N. K. Pruthi, C. D. Anson, S. Bueltmann, J. A. Vanfossen, M. Shao, Y. X. Pan, G. Van Buren, D. D. Koetke, J. Alford, L. V. Nogach, P. Seyboth, A. Ogawa, H. G. Ritter, H. F. Chen, Thomas A. Trainor, S. S. Shi, L. Xue, Jana Bielcikova, W. Guryn, G. Eppley, S. G. Steadman, D. P. Mahapatra, C-Q. Li, Madan M. Aggarwal, G. Van Nieuwenhuizen, P. Sorensen, Bedangadas Mohanty, M. Cherney, Lokesh Kumar, R. P. Scharenberg, Christina Markert, J. Pluta, E. Sangaline, Fuqiang Wang, D. Arkhipkin, Leszek Adamczyk, J. C. Dunlop, R. N. Singaraju, Elena Bruna, L. Huo, P. Pile, G. D. Westfall, J. Engelage, W. Li, Y. G. Ma, W. Peryt, H. S. Matis, R. Derradi de Souza, J. L. Romero, O. G. Grebenyuk, M. J. Skoby, Frank Jm Geurts, L. Li, A. Hamed, A. Ohlson, L. H. Tarini, R. G. Fersch, L. Didenko, Zubayer Ahammed, M. J. LeVine, W. W. Jacobs, A. Vossen, J. Fedorisin, Xiaofeng Luo, J. Turnau, Zhiming Li, Rene Bellwied, J. Lauret, E. Finch, Jifa Tian, Guo-Liang Ma, Y. H. Zhu, I. Sakrejda, L. M. Lima, R. E. Tribble, M. Wada, R. Lednicky, M. J. M. Codrington, T. Tarnowsky, P. Djawotho, Jize Zhao, J. C. Webb, J. Seele, Gerald W Hoffmann, R. A.N. Oliveira, Q. Y. Shou, T. G. Dedovich, Z. P. Zhang, Z. Barnovska, S. Horvat, A. Szanto de Toledo, A. S. Hirsch, C. K. Riley, S. H. Zhang, P. Kravtsov, A. M. Schmah, J. Kapitan, J. M. Landgraf, Michal Sumbera, A. A. P. Suaide, M. K. Mitrovski, T. P. Burton, Y. Yang, D. Solanki, T. Pawlak, W. Witzke, S. LaPointe, Y. Mohammed, Y. Fisyak, R. Witt, A. V. Alakhverdyants, S. W. Wissink, Nilay Shah, A. Sarkar, Y. Zhang, K. Oh, L. Koroleva, S. Mioduszewski, Xuan Zhang, A. V. Brandin, Nikola Poljak, K. Xin, Donald M. McDonald, Prithwish Tribedy, B. K. Srivastava, M. Strikhanov, A. Kesich, Hanna Paulina Zbroszczyk, J. Konzer, D. R. Beavis, L. C. Bland, F. Zhao, Y. J. Sun, J. W. Harris, O. I. Mall, M. A.C. Lamont, L-X. Han, Zhigang Xiao, J. Sandweiss, M. Sharma, Xiangyuan Cui, W. Christie, S. Kabana, Y. P. Viyogi, Y. Xu, W. M. Zhang, T. J. Humanic, S. G. Brovko, P. Yepes, A. Davila Leyva, P. Chaloupka, Z. J. Xu, A. H. Tang, X. Li, B. Morozov, R. Varma, James Prewitt Hays-Wehle, M. C. Suarez, D. N. Svirida, I. Bunzarov, Y. Yi, J. Rusnak, B. S. Page, D. P. Kikola, Janet Elizabeth Seger, C. A. Whitten, B. Stringfellow, S. Trentalange, L. Ruan, A. Luszczak, V. A. Kizka, J. H. Thomas, J. G. Cramer, B. Pawlik, R. Corliss, M. Naglis, Anju Bhasin, U. G. Desouza, E. W. Oldag, R. P. Redwine, K. Kang, Basanta Kumar Nandi, A. Lebedev, D. Kettler, G. S. Averichev, Li-Yi Chen, F. Liu, Mariusz Przybycien, R. D. Majka, J. Y. Chen, W. Borowski, J. Schambach, M. Zawisza, H. M. Spinka, A. Banerjee, Marcelo Gameiro Munhoz, D. J. Prindle, I. G. Alekseev, Donika Plyku, M. A. Lisa, F. Ding, Y. Panebratsev, H. Bichsel, D. Grosnick, G. Odyniec, Y. Zoulkarneeva, C. Zhong, Rolf K. Reed, Q. Wang, A. K. Bhati, D. Keane, Nikolai Smirnov, R. Stock, L. G. Efimov, T. K. Nayak, O. D. Tsai, N. R. Sahoo, T. R. Schuster, M. Elnimr, M. C. Cervantes, Sevil Salur, Hao Qiu, Jian Deng, G. Agakishiev, D. Cebra, X. L. Wang, S. Margetis, X. Dong, S. K. Pal, Justin Stevens, Jongmin Lee, R. L. Ray, T. Ljubicic, H. Caines, Sudhir Raniwala, and D. Thein
Subjects: Excitation function, Physics, 010308 nuclear & particles physics, Nuclear Theory, General Physics and Astronomy, Transport theory, Parton, 01 natural sciences, Nuclear physics, Pion, Flow (mathematics), Antiproton, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Recombination, Bar (unit)
Abstract: STAR's measurements of directed flow (v(1)) around midrapidity for pi(+/-), K-+/-, K-S(0), p, and (p) over bar in Au + Au collisions at root s(NN) = 200 GeV are presented. A negative v(1) (y) slope is observed for most of produced particles (pi(+/-), K-+/-, K-S(0), p, and (p) over bar). In 5%-30% central collisions, a sizable difference is present between the v(1)(y) slope of protons and antiprotons, with the former being consistent with zero within errors. The v(1) excitation function is presented. Comparisons to model calculations (RQMD, UrQMD, AMPT, QGSM with parton recombination, and a hydrodynamics model with a tilted source) are made. For those models which have calculations of v(1) for both pions and protons, none of them can describe v(1()y) forpions and protons simultaneously. The hydrodynamics model with a tilted source as currently implemented cannot explain the centrality dependence of the difference between the v(1)(y) slopes of protons and antiprotons.
Published: 2012

83. Ground and excited state charmonium production inp+pcollisions ats=200 GeV

Author: J. Gosset, S. Yokkaichi, Y. Ikeda, J. G. Boissevain, E. J. Mannel, C. Pinkenburg, M. Stepanov, G. Roche, Y. J. Mao, J. H. Kang, J. S. Haggerty, Y. S. Lai, J. T. Mitchell, V. S. Pantuev, Y. Onuki, Maya Hachiya Shimomura, I. Ravinovich, M. Gonin, Jan Rak, K. A. Drees, A. V. Kazantsev, E. H. Kim, X. Jiang, R. Lacey, K. S. Joo, Mate Csanad, Y. I. Makdisi, Vladimir Samsonov, A. Kiss, Alexander Milov, I. Nakagawa, R. Seidl, Vladislav Manko, C. L. Woody, A. Berdnikov, K. N. Barish, J. Hamblen, S. Nam, A. Sukhanov, H. Pereira, R. Vértesi, T. Ichihara, Hongfang Liu, D. E. Fields, B. V. Jacak, L. Tomášek, T. Engelmore, O. Drapier, Frank Ellinghaus, R. Pak, S. Sano, Ajit Kumar Mohanty, K. V. Dharmawardane, M. Bai, M. Slunečka, R. Granier de Cassagnac, A. Adare, E. R. Kinney, D. P. Morrison, M. Nihashi, M. McCumber, T. A. Shibata, C. L. Silva, K. Okada, Henner Buesching, B. Sahlmueller, T. Sato, Steve Edwards, H. En'yo, Takahiro Fusayasu, H. Iinuma, Y. Morino, M. J. Tannenbaum, S. Campbell, Tamas Ferenc Csorgo, David D'Enterria, M. J. Leitch, N. Kamihara, H. Torii, K. Das, S. Belikov, J. L. Nagle, S. Tarafdar, J. Hanks, N. Apadula, E. P. Hartouni, A. Kim, Sung Keun Park, Charles Maguire, L. Aphecetche, V. E. Semenov, Tatsuya Chujo, A. Caringi, D. Mukhopadhyay, S. Rembeczki, R. P. Pisani, M. L. Brooks, T. C. Awes, D. Isenhower, Marcus Hohlmann, N. N. Ajitanand, A. Toia, G. Grim, A. P.T. Palounek, Kyoichiro Ozawa, T. Liška, J. S. Bok, I. Tserruya, J. E. Frantz, L. Mašek, Alexander Malakhov, Kazuyoshi Kurita, Alice Mignerey, O. Dietzsch, Eva Haslum, G. S. Kyle, B. Lenzi, Jun Kikuchi, L. D'Orazio, K. Watanabe, Yu. Efremenko, T. Niita, V. Singh, B. Love, C. Vale, Takahiro Nakamura, B. S. Chang, C. Oakley, A. Drees, James Alexander, Marisilvia Donadelli, K. Karatsu, L. A. Linden Levy, V. Bumazhnov, Aaron Angerami, E. T. Atomssa, Y. Fukao, J. L. Charvet, A. Dion, P. Mikeš, R. Averbeck, K. Shoji, Christine Angela Aidala, Susumu Oda, Byung-Sik Hong, J. Klay, H. Valle, S. Afanasiev, D. Silvermyr, T. Hester, Andry Malala Rakotozafindrabe, A. Ster, Takao Sakaguchi, A. Bazilevsky, S. Esumi, Zhiying You, Dmitry Blau, Anne Marie Sickles, S. P. Sorensen, C. Klein-Boesing, R. Bennett, R. Tanabe, A. Durum, M. Kawashima, Philippe Rosnet, Dipanwita Dutta, J. Newby, W. A. Zajc, M. Kurosawa, D. Layton, L. S. Zolin, Johannes Peter Wessels, E. J. Desmond, I. V. Sourikova, Catherine Micaela Silvestre, A. Enokizono, Alexandre Lebedev, A. D. Frawley, K. O. Eyser, A. K. Purwar, K. Fujiwara, Minghui Liu, W. J. Park, Christopher Rosen, Y. L. Yamaguchi, P. W. Stankus, A. G. Litvinenko, O. Chvala, K. Yamaura, V. Baublis, P. Chung, D. M. Lee, S. Huang, A. Hadj Henni, M. Finger, W. C. Chang, Kiyoshi Tanida, F. Matathias, Julia Velkovska, A. Denisov, M. Kasai, V. Cianciolo, Kensuke Homma, P. D. Barnes, A. Yanovich, Seong H. Kim, E. Richardson, M. Togawa, E. Vazquez-Zambrano, M. Heffner, J. Park, M. Rosati, J. Imrek, D. Hornback, V-N. Tram, N. Grau, W. Holzmann, K. Kiriluk, Y. Tomita, Jongmin Lee, Kenneth Francis Read, A. Glenn, Beomkyu Kim, K. Boyle, Wei Xie, Rushan Han, C. A. Ogilvie, J. G. Lajoie, P. Constantin, B. Komkov, A. Datta, Sergey Fokin, S. Chernichenko, E. Kistenev, Eunja Kim, M. Ouchida, Taku Gunji, H. Gong, Kisung Lee, A. Taranenko, J. Seele, K. I. Hahn, T. K. Hemmick, Y. Tsuchimoto, Y. Iwanaga, B. Bassalleck, D. Lynch, Motoi Inaba, F. Kajihara, R. M. Wright, Tadaaki Isobe, Jen-Chieh Peng, Norio Saito, Tsutomu Mibe, J. M. Durham, B. Meredith, G. R. Young, I. J. Choi, A. Kravitz, N. Means, H. W. Van Hecke, M. A. L. Leite, Kazushi Miki, Yasuo Miake, A. A. Vinogradov, T. Horaguchi, A. Kozlov, R. Seto, K. Haruna, I. E. Yushmanov, M. Konno, K. B. Lee, J. Asai, Brajesh K. Singh, P. Lichtenwalner, Jiangyong Jia, Alexei Khanzadeev, Y. Goto, S. Butsyk, P. L. McGaughey, Inkyu Park, John Hill, H. A. Gustafsson, D. S. Jumper, S. Bathe, E. Stenlund, R. Belmont, L. Kochenda, M. Issah, Xiong Wang, Z. Conesa del Valle, Agneta Oskarsson, M. Chiu, Y. Nakamiya, Dong Jo Kim, V. L. Rykov, T. Dahms, J. B. Choi, S. Zhou, Shingo Sakai, J. S. Kapustinsky, V. Babintsev, Toru Sugitate, H. Qu, C. Zhang, Y. Berdnikov, D. Kleinjan, A. Baldisseri, S. Dairaku, S. D. Rolnick, K. Sakashita, T. L. Thomas, I. Danchev, Y. Akiba, P. Ružička, G. Baksay, M. Mishra, S. Nagamiya, D. Roach, K. M. Kijima, O. Zaudtke, A. Veicht, J. H. Bhom, X. He, Hideki Hamagaki, K. Aoki, Viktor Riabov, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, Ryugo S. Hayano, M. Virius, T. V. Moukhanova, M. I. Nagy, K. S. Sim, V. Dzhordzhadze, G. David, Jason Kamin, Y. Aramaki, D. Watanabe, Y. Riabov, S. P. Stoll, Xingguo Li, Kenta Shigaki, François Fleuret, M. D. Malik, M. Nguyen, Y. Kwon, E. Vznuzdaev, V. Peresedov, Y. J. Kim, R. A. Soltz, H. Borel, C. H. Chen, R. Yang, S. S.E. Rosendahl, A. S. Nyanin, G. Bunce, S. N. White, Rachid Nouicer, J. Koster, M. Proissl, M. Grosse Perdekamp, Deepa Thomas, S. Taneja, A. Churyn, M. E. Connors, D. Jouan, Y. Tanaka, Zvi Hirsh Citron, K. Imai, K. Nakano, T. Kempel, W. E. Sondheim, D. Ivanischev, S. Batsouli, H. Masui, A. K. Dubey, Dong-Hun Kim, P. A. Rukoyatkin, T. Jones, A. A. Bickley, Peter Christiansen, D. Winter, D. Yu Peressounko, P. Tarján, H. J. Moon, L. Baksay, H. Pei, Senta Greene, A. T. Basye, B. Fadem, E. O'Brien, C. Baumann, S. Kametani, C. P. Singh, B. M. Johnson, T. Murakami, A. Deshpande, R. J. Petti, A. Isupov, C. Suire, J. Sziklai, Brian Cole, S. Sawada, J. Ying, A. Franz, D. Sharma, Y. Watanabe, R. Ichimiya, Tae-Yeon Lee, Martin Purschke, I. Younus, A. Morreale, Z. Fraenkel, M. K. Dayananda, R. K. Choudhury, B. Azmoun, A. Král, M. J. Kweon, M. Wysocki, J. Jin, E. M. Takagui, A. Soldatov, M. Oka, R. S. Towell, I. Garishvili, F. Wei, Atsushi Taketani, P. Liebing, C. M. Camacho, Prashant Shukla, S. F. Pate, Ke. Nakamura, H. Al-Bataineh, M. Naglis, V. Papavassiliou, C. Y. Chi, Masayasu Ishihara, F. Staley, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, and A. Yu. Semenov
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Context (language use), 01 natural sciences, Nuclear physics, Particle decay, Excited state, 0103 physical sciences, Production model, Statistical precision, High Energy Physics::Experiment, Production (computer science), Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: We report on charmonium measurements [J/psi (1S), psi' (2S), and chi(c) (1P)] in p + p collisions at root s = 200 GeV. We find that the fraction of J/psi coming from the feed-down decay of psi' and chi(c) in the midrapidity region (vertical bar y vertical bar < 0: 35) is 9.6 +/- 2.4% and 32 +/- 9%, respectively. We also present the p(T) and rapidity dependencies of the J/psi yield measured via dielectron decay at midrapidity (vertical bar y vertical bar < 0.35) and via dimuon decay at forward rapidity (1.2 < vertical bar y vertical bar < 2.2). The statistical precision greatly exceeds that reported in our previous publication [Phys. Rev. Lett. 98, 232002 (2007)]. The new results are compared with other experiments and discussed in the context of current charmonium production models.
Published: 2012

84. Identified Hadron Compositions inp+pandAu+AuCollisions at High Transverse Momenta atsNN=200 GeV

Author: D. Thein, Nasim, R. A.N. Oliveira, N. Xu, P. Filip, M. Tokarev, P. Pile, G. D. Westfall, C. D. Anson, Y. Fisyak, T. D. S. Stanislaus, W. L. Zhan, D. R. Gangadharan, H. H. Wieman, K. Oh, Frank Simon, V. A. Kizka, J. H. Thomas, P. R. Pujahari, H. Bichsel, C. B. Powell, Bedangadas Mohanty, U. G. Desouza, H. Z. Huang, S. Vokal, G. Odyniec, Y. Zoulkarneeva, G. Eppley, I. Selyuzhenkov, Vitaly Okorokov, G. Wang, C. Zhong, D. Kettler, R. G. Fersch, J. C. Dunlop, Zhigang Xiao, J. Pluta, O. I. Mall, W. Li, Rene Bellwied, Y. H. Zhu, L. M. Lima, R. E. Tribble, Jize Zhao, Gerald W Hoffmann, M. Shao, G. Van Buren, M. Sharma, T. J. Humanic, Bernd Surrow, Zubayer Ahammed, K. Yip, Xiangming Sun, B. Huang, J. Engelage, B. D. Anderson, M. A.C. Lamont, L-X. Han, N. K. Pruthi, J. S. Wang, A. M. Poskanzer, Q. Wang, M. J. LeVine, P. Chung, R. R. Debbe, N. G. Minaev, S. S. Shi, M. Wada, L. Kotchenda, Z. J. Sun, G. S. Averichev, N. R. Sahoo, A. Kechechyan, T. R. Schuster, Russell Richard Betts, Wei Xie, X. Li, H. G. Ritter, D. G. Underwood, S. G. Steadman, Q. Y. Shou, Premomoy Ghosh, C. A. Gagliardi, M. Pachr, R. Cendejas, J. M. Landgraf, Anik Gupta, Anju Bhasin, R. Varma, James Prewitt Hays-Wehle, J. L. Drachenberg, H. Pei, Hao Qiu, J. Joseph, S. K. Gupta, P. Seyboth, J. Rusnak, R. S. Longacre, J. Porter, R. P. Redwine, J. Kiryluk, J. H. Chen, B. S. Page, Y. G. Ma, W. Peryt, C. A. Whitten, L. Ruan, Olga Evdokimov, Barbara Antonina Trzeciak, G. M.S. Vasconcelos, K. Kang, Sergey Voloshin, D. P. Kikola, Lee Stuart Barnby, O. D. Tsai, M. Strikhanov, M. K. Mustafa, J. Konzer, A. Lebedev, M. Naglis, L. H. Tarini, R. Corliss, Michal Sumbera, A. A. P. Suaide, Jaroslav Bielcik, W. J. Llope, B. Stringfellow, Jorn Henning Putschke, L. Koroleva, M. J. Skoby, Frank Jm Geurts, T. S. McShane, Y. Wang, Y. Li, S. Bueltmann, Jian Deng, Jay Roberts, I. Koralt, R. Derradi de Souza, J. Sandweiss, A. V. Brandin, Y. Pandit, G. Igo, L. V. Nogach, A. Ohlson, O. V. Rogachevskiy, Jifa Tian, Ermes Braidot, J. Cheng, M. Elnimr, T. J. M. Symons, Ross Milner, M. C. Cervantes, J. Bouchet, G. Van Nieuwenhuizen, Mitali Mondal, M. J. M. Codrington, D. Cebra, K. Kauder, D. D. Koetke, Matthew Walker, N. Schmitz, D. Solanki, M. Estienne, L. C. De Silva, L. Xue, D. P. Mahapatra, Anthony Robert Timmins, D. A. Morozov, Haiyan Wang, Adam Ryszard Kisiel, V. Fine, S. W. Wissink, Li-Yi Chen, H. W. Ke, Xiangyuan Cui, W. Christie, H. J. Crawford, S. H. Zhang, Y. J. Sun, Xuan Zhang, X. Z. Cai, E. V. Lukashov, Basanta Kumar Nandi, R. Fatemi, Michael Joseph Betancourt, Q. H. Xu, E. Shahaliev, W. M. Zhang, Andrey Vasiliev, Marcelo Gameiro Munhoz, D. J. Prindle, Hanna Paulina Zbroszczyk, Nikola Poljak, Thorsten Sven Kollegger, B. Haag, K. Krueger, M. Zawisza, H. M. Spinka, Elena Bruna, David Jonathan Hofman, H. Masui, S. Kabana, Y. P. Viyogi, J. A. Vanfossen, L. C. Bland, I. Sakrejda, R. N. Singaraju, L. Huo, B. Morozov, D. R. Beavis, I. G. Alekseev, Janet Elizabeth Seger, Donika Plyku, A. Szanto de Toledo, Zebo Tang, A. P. Meschanin, J. Kapitan, S. Heppelmann, M. A. Lisa, M. K. Mitrovski, F. Zhao, M. Cherney, Lokesh Kumar, J. Takahashi, J. G. Cramer, Y. Yang, S. G. Brovko, Sevil Salur, F. Liu, S. LaPointe, T. Pawlak, A. Gordon, Nilay Shah, S. B. Nurushev, W. Witzke, Guo-Liang Ma, Y. Mohammed, I. K. Yoo, R. Witt, A. V. Alakhverdyants, C. Perkins, T. G. Dedovich, M. C. Suarez, D. N. Svirida, J. B. Zhang, J. E. Draper, Y. F. Wu, A. Sarkar, A. Chikanian, S. Mioduszewski, T. Peitzmann, Y. Panebratsev, D. Grosnick, R. D. Majka, J. Y. Chen, E. W. Oldag, W. Borowski, J. Schambach, Donald M. McDonald, E. G. Judd, Prithwish Tribedy, B. K. Srivastava, Yi Zhang, J. Alford, Rolf K. Reed, Z. P. Zhang, E. Sangaline, D. Arkhipkin, A. Hamed, W. Guryn, A. S. Hirsch, P. Kravtsov, O. G. Grebenyuk, A. M. Schmah, A. K. Bhati, D. Keane, J. Fedorisin, Nikolai Smirnov, R. Stock, J. L. Romero, L. G. Efimov, E. Finch, T. K. Nayak, T. P. Burton, F. Videbæk, G. Webb, Sukalyan Chattopadhyay, Y. Xu, P. Chaloupka, Chitrasen Jena, Z. J. Xu, S. Trentalange, Y. P. Lu, W. Xu, Wolfgang Korsch, Xiaofeng Zhu, A. Ogawa, H. F. Chen, Thomas A. Trainor, C-Q. Li, R. P. Scharenberg, Christina Markert, H. S. Matis, W. W. Jacobs, J. Lauret, R. Lednicky, T. Tarnowsky, P. Djawotho, D. Tlusty, I. G. Bordyuzhin, Mirko Planinic, Y. N. Gorbunov, O. Hajkova, M. Calderon De La Barca Sanchez, J. W. Harris, P. Yepes, A. Davila Leyva, X. G. Luo, A. H. Tang, I. Bunzarov, L. Li, J. Seele, Jana Bielcikova, P. Sorensen, G. Agakishiev, L. Didenko, Zhiming Li, J. C. Webb, P. Fachini, William Axel Leight, S. R. Klein, D. L. Olson, A. A. Derevschikov, Jongmin Lee, R. L. Ray, T. Ljubicic, H. Caines, Sudhir Raniwala, X. L. Wang, S. Margetis, X. Dong, S. K. Pal, Justin Stevens, E. P. Sichtermann, J. Balewski, Rashmi Raniwala, Claude Andre Pruneau, T. Ullrich, C. M. Du, H. S. Xu, L. Eun, Madan M. Aggarwal, and Fuqiang Wang
Subjects: Physics, Energy loss, Particle physics, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, Parton, 01 natural sciences, Nuclear physics, Casimir effect, Transverse plane, 0103 physical sciences, Transverse momentum, Fragmentation function, Yield ratio, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: We report transverse momentum (p(T) = 8 GeV/c are measured to be similar to the p + p results, despite the expected Casimir effect for parton energy loss.
Published: 2012

85. Strangeness Enhancement in Cu-Cu and Au-Au Collisions atsNN=200 GeV

Author: L. Kotchenda, Bedangadas Mohanty, E. P. Sichtermann, R. G. Fersch, J. Balewski, Rashmi Raniwala, Claude Andre Pruneau, T. Ullrich, C. M. Du, H. S. Xu, L. Eun, M. Calderon De La Barca Sanchez, M. Wada, R. Fatemi, Michael Joseph Betancourt, M. K. Mustafa, K. Krueger, T. S. McShane, D. P. Mahapatra, Jongmin Lee, R. L. Ray, T. Ljubicic, H. Caines, Sudhir Raniwala, J. A. Vanfossen, X. L. Wang, C. Zhong, Thorsten Sven Kollegger, S. Heppelmann, X. Dong, S. K. Pal, Justin Stevens, M. Cherney, Lokesh Kumar, Matthew Walker, F. Liu, J. B. Zhang, D. D. Koetke, J. E. Draper, Y. J. Sun, J. L. Romero, T. P. Burton, R. Manweiler, Hongfang Liu, J. Engelage, R. D. Majka, Li-Yi Chen, J. Y. Chen, W. Borowski, S. Margetis, J. Schambach, S. Kabana, E. Finch, A. M. Poskanzer, Premomoy Ghosh, J. M. Landgraf, Y. P. Viyogi, Xiangyuan Cui, W. Christie, David Jonathan Hofman, H. Masui, F. Videbæk, M. Zawisza, H. M. Spinka, Mateusz Andrzej Ploskon, R. Witt, G. Webb, Q. H. Xu, A. Kechechyan, W. M. Zhang, Andrey Vasiliev, L. Li, S. Mioduszewski, R. A.N. Oliveira, B. Morozov, J. Seele, M. Krus, R. Cendejas, J. Porter, Peter Martin Jacobs, Janet Elizabeth Seger, O. I. Mall, Madan M. Aggarwal, Anju Bhasin, J. Takahashi, D. Thein, Fuqiang Wang, R. P. Redwine, M. A.C. Lamont, L-X. Han, Donald M. McDonald, S. B. Nurushev, L. H. Tarini, J. W. Harris, Prithwish Tribedy, Chitrasen Jena, A. Lebedev, H. Pei, Y. Fisyak, E. Hjort, B. K. Srivastava, R. N. Singaraju, L. Huo, Jana Bielcikova, A. P. Meschanin, Y. F. Wu, M. Tokarev, K. Oh, L. Koroleva, Yong Xu, Y. P. Lu, P. Yepes, A. Davila Leyva, S. Chattopadhyay, B. V.K.S. Potukuchi, W. Xu, Wolfgang Korsch, X. G. Luo, Ross Milner, A. H. Tang, G. Wang, P. Seyboth, W. J. Llope, I. Bunzarov, Jian Deng, P. Sorensen, T. D. S. Stanislaus, G. Agakishiev, Zhigang Xiao, M. Sharma, H. H. Wieman, I. Koralt, Peter Graham Jones, R. Derradi de Souza, S. K. Gupta, D. Cebra, N. G. Minaev, M. Estienne, Kejun Kang, L. V. Nogach, W. L. Zhan, A. Ohlson, Xiaofeng Zhu, I. K. Yoo, Y.Y. Li, Frank Simon, Marcelo Gameiro Munhoz, D. J. Prindle, G. Van Nieuwenhuizen, J. H. Thomas, U. G. Desouza, Xuan Zhang, Jie Liu, Ermes Braidot, P. Chung, A. Ogawa, M. J. M. Codrington, L. Didenko, I. G. Alekseev, Donika Plyku, H. F. Chen, M. A. Lisa, V. Fine, Thomas A. Trainor, E. G. Judd, Anthony Robert Timmins, Adam Ryszard Kisiel, Wei Xie, Hanna Paulina Zbroszczyk, H. J. Crawford, H. Bichsel, G. Odyniec, Y. Zoulkarneeva, E. V. Lukashov, D. R. Beavis, J. Joseph, William Axel Leight, J. G. Cramer, G. M.S. Vasconcelos, Q. Wang, J. L. Drachenberg, Olga Evdokimov, Barbara Antonina Trzeciak, N. R. Sahoo, Haiyan Wang, S. R. Klein, Y. Pandit, T. R. Schuster, N. L. Subba, D. Kettler, N. Schmitz, E. Shahaliev, F. Zhao, D. L. Olson, C-Q. Li, R. P. Scharenberg, Christina Markert, X. Z. Cai, Jay Roberts, H. Z. Huang, S. Vokal, G. S. Averichev, A. A. Derevschikov, H. W. Ke, R. S. Longacre, M. Shao, G. Van Buren, I. Selyuzhenkov, Michal Sumbera, A. A. P. Suaide, Vitaly Okorokov, Bernd Surrow, S. S. Shi, E. W. Oldag, S. W. Wissink, A. Bridgeman, G. Igo, J. Kiryluk, Nikola Poljak, J. H. Chen, J. Bouchet, Russell Richard Betts, J. Schaub, K. Kauder, J. M. Nelson, Zhenyu Zhang, D. A. Morozov, Z. J. Sun, D. G. Underwood, B. Haag, W. Peryt, J. Cheng, T. J. M. Symons, Zhiming Li, Zebo Tang, A. K. Bhati, L. C. De Silva, Sergey Voloshin, D. Keane, T. G. Dedovich, Nikolai Smirnov, R. Stock, J. C. Dunlop, A. Szanto de Toledo, L. G. Efimov, J. Kapitan, J. C. Webb, Zubayer Ahammed, S. M. Dogra, T. J. Humanic, M. J. LeVine, T. K. Nayak, T. Pawlak, W. Witzke, Y. Mohammed, A. V. Alakhverdyants, A. Sarkar, C. Perkins, O. D. Tsai, S. Bueltmann, J. Alford, Q. Y. Shou, W. Guryn, O. G. Grebenyuk, M. Elnimr, M. C. Cervantes, J. Fedorisin, T. Peitzmann, A. G. Knospe, P. R. Pujahari, C. B. Powell, R. Varma, James Prewitt Hays-Wehle, B. S. Page, Anik Gupta, D. P. Kikola, Elena Bruna, B. Stringfellow, Sevil Salur, Y. Wang, M. J. Skoby, Frank Jm Geurts, Y. Panebratsev, D. Grosnick, V. Kouchpil, Jifa Tian, Guo-Liang Ma, Yi Zhang, Rolf K. Reed, S. H. Zhang, A. S. Hirsch, P. Kravtsov, Yinina Ma, A. M. Schmah, M. Strikhanov, J. Konzer, Ki-Seok Choi, J. Sandweiss, D. R. Gangadharan, K. Yip, J. S. Wang, R. R. Debbe, H. S. Matis, S. G. Steadman, W. W. Jacobs, J. Lauret, I. Sakrejda, X. Li, M. Naglis, J. Rusnak, C. A. Whitten, R. Lednicky, Feng Jin, L. Ruan, L. C. Bland, R. Corliss, Y. Yang, T. Tarnowsky, P. Djawotho, N. Xu, P. Filip, Basanta Kumar Nandi, M. K. Mitrovski, S. LaPointe, N. Li, P. Pile, G. D. Westfall, A. Gordon, Nilay Shah, S. G. Brovko, D. Tlusty, I. G. Bordyuzhin, Mirko Planinic, M. C. Suarez, D. N. Svirida, A. Chikanian, Xiangming Sun, B. Huang, V. Kizka, Hao Qiu, Y. N. Gorbunov, B. D. Anderson, O. Hajkova, E. Sangaline, D. Arkhipkin, A. Hamed, N. K. Pruthi, G. Eppley, D. Solanki, J. Pluta, W. Li, Rene Bellwied, Y. H. Zhu, L. M. Lima, R. E. Tribble, Jize Zhao, Gerald W Hoffmann, C. A. Gagliardi, M. Pachr, Jorn Henning Putschke, A. V. Brandin, M. Heinz, Lee Stuart Barnby, Jaroslav Bielcik, Nirbhay Kumar Behera, H. G. Ritter, O. V. Rogachevskiy, Mitali Mondal, L. Xue, P. Chaloupka, Z. J. Xu, S. Trentalange, and C. D. Anson
Subjects: Physics, Quantitative Biology::Neurons and Cognition, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, chemistry.chemical_element, Strangeness, Lambda, 01 natural sciences, Omega, Copper, Nuclear physics, chemistry, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Relativistic Heavy Ion Collider, Bar (unit)
Abstract: We report new STAR measurements of midrapidity yields for the Lambda, (Lambda) over bar, K-S(0), Xi(-), (Xi) over bar (+), Omega(-), (Omega) over bar (+) particles in Cu + Cu collisions at root s(NN) = 200 GeV, and midrapidity yields for the Lambda, (Lambda) over bar, K-S(0) particles in Au + Au at root s(NN) = 200 GeV. We show that, at a given number of participating nucleons, the production of strange hadrons is higher in Cu + Cu collisions than in Au + Au collisions at the same center-of-mass energy. We find that aspects of the enhancement factors for all particles can be described by a parametrization based on the fraction of participants that undergo multiple collisions.
Published: 2012

86. ρ0photoproduction in AuAu collisions atsNN=62.4GeV measured with the STAR detector

Author: G. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, C. D. Anson, D. Arkhipkin, G. S. Averichev, J. Balewski, D. R. Beavis, N. K. Behera, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, E. Braidot, A. V. Brandin, A. Bridgeman, S. G. Brovko, E. Bruna, S. Bueltmann, I. Bunzarov, T. P. Burton, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, K. E. Choi, W. Christie, P. Chung, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, A. A. Derevschikov, R. Derradi de Souza, L. Didenko, P. Djawotho, S. M. Dogra, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, M. Estienne, L. Eun, O. Evdokimov, R. Fatemi, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, V. Fine, Y. Fisyak, C. A. Gagliardi, F. Geurts, P. Ghosh, Y. N. Gorbunov, A. Gordon, O. G. Grebenyuk, D. Grosnick, A. Gupta, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, J. W. Harris, J. P. Hays-Wehle, M. Heinz, S. Heppelmann, A. Hirsch, E. Hjort, G. W. Hoffmann, D. J. Hofman, B. Huang, H. Z. Huang, T. J. Humanic, L. Huo, G. Igo, P. Jacobs, W. W. Jacobs, C. Jena, F. Jin, J. Joseph, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, D. Kettler, D. P. Kikola, J. Kiryluk, A. Kisiel, V. Kizka, S. R. Klein, A. G. Knospe, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. Koroleva, W. Korsch, L. Kotchenda, V. Kouchpil, P. Kravtsov, K. Krueger, M. Krus, L. Kumar, M. A. C. Lamont, J. M. Landgraf, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, L. Li, N. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, H. Liu, J. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, E. V. Lukashov, X. Luo, G. L. Ma, Y. G. Ma, D. P. Mahapatra, R. Majka, O. I. Mall, R. Manweiler, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, A. Meschanin, R. Milner, N. G. Minaev, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, B. Morozov, D. A. Morozov, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, T. K. Nayak, L. V. Nogach, S. B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, M. Pachr, B. S. Page, S. K. Pal, Y. Pandit, Y. Panebratsev, T. Pawlak, H. Pei, T. Peitzmann, C. Perkins, W. Peryt, P. Pile, M. Planinic, M. A. Ploskon, J. Pluta, D. Plyku, N. Poljak, J. Porter, A. M. Poskanzer, B. V. K. S. Potukuchi, C. B. Powell, D. Prindle, C. Pruneau, N. K. Pruthi, P. R. Pujahari, J. Putschke, H. Qiu, R. Raniwala, S. Raniwala, R. L. Ray, R. Redwine, R. Reed, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, L. Ruan, J. Rusnak, N. R. Sahoo, I. Sakrejda, S. Salur, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, J. Schaub, A. M. Schmah, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, I. Selyuzhenkov, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, F. Simon, R. N. Singaraju, M. J. Skoby, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, S. G. Steadman, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, N. L. Subba, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, D. Thein, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, T. A. Trainor, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, A. N. Vasiliev, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, M. Wada, M. Walker, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, W. Witzke, Y. F. Wu, Z. Xiao, W. Xie, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, K. Yip, I-K. Yoo, M. Zawisza, H. Zbroszczyk, W. Zhan, J. B. Zhang, S. Zhang, W. M. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, and Y. Zoulkarneeva
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Theoretical models, Virtual particle, 01 natural sciences, Nuclear physics, medicine.anatomical_structure, 0103 physical sciences, medicine, High Energy Physics::Experiment, Vector meson, Center of mass, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Nucleus, STAR detector
Abstract: Vector mesons may be photoproduced in relativistic heavy-ion collisions when a virtual photon emitted by one nucleus scatters from the other nucleus, emerging as a vector meson. The STAR Collaboration has previously presented measurements of coherent rho(0) photoproduction at center of mass energies of 130 GeV and 200 GeV in AuAu collisions. Here, we present a measurement of the cross section at 62.4 GeV; we find that the cross section for coherent rho(0) photoproduction with nuclear breakup is 10.5 +/- 1.5 +/- 1.6mb at 62.4 GeV. The cross-section ratio between 200 GeV and 62.4 GeV is 4.4 +/- 0.6, less than is predicted by most theoretical models. It is, however, proportionally much larger than the previously observed 15% +/- 55% increase between 130 GeV and 200 GeV.
Published: 2012

87. Directed and elliptic flow of charged particles in Cu+Cu collisions atsNN=22.4GeV

Author: G. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, C. D. Anson, D. Arkhipkin, G. S. Averichev, J. Balewski, D. R. Beavis, N. K. Behera, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, E. Braidot, A. V. Brandin, A. Bridgeman, S. G. Brovko, E. Bruna, S. Bueltmann, I. Bunzarov, T. P. Burton, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, P. Chaloupka, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, K. E. Choi, W. Christie, P. Chung, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, null Cui, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, J. Deng, A. A. Derevschikov, R. Derradi de Souza, L. Didenko, P. Djawotho, S. M. Dogra, X. Dong, J. L. Drachenberg, J. E. Draper, C. M. Du, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, M. Estienne, L. Eun, O. Evdokimov, R. Fatemi, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, V. Fine, Y. Fisyak, C. A. Gagliardi, D. R. Gangadharan, F. Geurts, P. Ghosh, Y. N. Gorbunov, A. Gordon, O. G. Grebenyuk, D. Grosnick, A. Gupta, S. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L.-X. Han, J. W. Harris, J. P. Hays-Wehle, M. Heinz, S. Heppelmann, A. Hirsch, E. Hjort, G. W. Hoffmann, D. J. Hofman, B. Huang, H. Z. Huang, T. J. Humanic, L. Huo, G. Igo, P. Jacobs, W. W. Jacobs, C. Jena, F. Jin, J. Joseph, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, D. Kettler, D. P. Kikola, J. Kiryluk, A. Kisiel, V. Kizka, S. R. Klein, A. G. Knospe, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. Koroleva, W. Korsch, L. Kotchenda, V. Kouchpil, P. Kravtsov, K. Krueger, M. Krus, L. Kumar, M. A. C. Lamont, J. M. Landgraf, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, L. Li, N. Li, W. Li, X. Li, Y. Li, Z. M. Li, L. M. Lima, M. A. Lisa, F. Liu, H. Liu, J. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, Y. Lu, E. V. Lukashov, X. Luo, G. L. Ma, Y. G. Ma, D. P. Mahapatra, R. Majka, O. I. Mall, R. Manweiler, S. Margetis, C. Markert, H. Masui, H. S. Matis, D. McDonald, T. S. McShane, A. Meschanin, R. Milner, N. G. Minaev, S. Mioduszewski, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, B. Morozov, D. A. Morozov, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, T. K. Nayak, L. V. Nogach, S. B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, R. A. N. Oliveira, D. Olson, M. Pachr, B. S. Page, S. K. Pal, Y. Pandit, Y. Panebratsev, T. Pawlak, H. Pei, T. Peitzmann, C. Perkins, W. Peryt, P. Pile, M. Planinic, M. A. Ploskon, J. Pluta, D. Plyku, N. Poljak, J. Porter, A. M. Poskanzer, B. V. K. S. Potukuchi, C. B. Powell, D. Prindle, C. Pruneau, N. K. Pruthi, P. R. Pujahari, J. Putschke, H. Qiu, R. Raniwala, S. Raniwala, R. L. Ray, R. Redwine, R. Reed, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, L. Ruan, J. Rusnak, N. R. Sahoo, I. Sakrejda, S. Salur, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, J. Schaub, A. M. Schmah, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, I. Selyuzhenkov, P. Seyboth, N. Shah, E. Shahaliev, M. Shao, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, F. Simon, R. N. Singaraju, M. J. Skoby, N. Smirnov, D. Solanki, P. Sorensen, U. G. deSouza, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, S. G. Steadman, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, N. L. Subba, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, D. Thein, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, S. Trentalange, R. E. Tribble, P. Tribedy, B. A. Trzeciak, O. D. Tsai, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, A. N. Vasiliev, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, M. Wada, M. Walker, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, W. Witzke, Y. F. Wu, Z. Xiao, W. Xie, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, K. Yip, I.-K. Yoo, M. Zawisza, H. Zbroszczyk, W. Zhan, J. B. Zhang, S. Zhang, W. M. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, F. Zhao, J. Zhao, C. Zhong, X. Zhu, Y. H. Zhu, and Y. Zoulkarneeva
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Time projection chamber, Quantitative Biology::Neurons and Cognition, 010308 nuclear & particles physics, Elliptic flow, 01 natural sciences, Charged particle, Nuclear physics, 0103 physical sciences, Quark–gluon plasma, Particle, Atomic physics, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, STAR detector
Abstract: This paper reports results for directed flow v1 and elliptic flow v2 of charged particles in Cu + Cu collisions at √sNN=22.4 GeV at the Relativistic Heavy Ion Collider. The measurements are for the 0–60% most central collisions, using charged particles observed in the STAR detector. Our measurements extend to 22.4-GeV Cu + Cu collisions the prior observation that v1 is independent of the system size at 62.4 and 200 GeV and also extend the scaling of v1 with η/ybeam to this system. The measured v2(pT) in Cu + Cu collisions is similar for √sNN throughout the range 22.4 to 200 GeV. We also report a comparison with results from transport model (ultrarelativistic quantum molecular dynamics and multiphase transport model) calculations. The model results do not agree quantitatively with the measured v1(η), v2(pT), and v2(η).
Published: 2012

88. Directed flow of identified particles in Au+Au collisions at √[SNN]=200 GeV at RHIC

Author: L, Adamczyk, G, Agakishiev, M M, Aggarwal, Z, Ahammed, A V, Alakhverdyants, I, Alekseev, J, Alford, B D, Anderson, C D, Anson, D, Arkhipkin, G S, Averichev, J, Balewski, A, Banerjee, Z, Barnovska, D R, Beavis, R, Bellwied, M J, Betancourt, R R, Betts, A, Bhasin, A K, Bhati, H, Bichsel, J, Bielcik, J, Bielcikova, L C, Bland, I G, Bordyuzhin, W, Borowski, J, Bouchet, A V, Brandin, S G, Brovko, E, Bruna, S, Bueltmann, I, Bunzarov, T P, Burton, J, Butterworth, X Z, Cai, H, Caines, M, Calderón de la Barca Sánchez, D, Cebra, R, Cendejas, M C, Cervantes, P, Chaloupka, S, Chattopadhyay, H F, Chen, J H, Chen, J Y, Chen, L, Chen, J, Cheng, M, Cherney, A, Chikanian, W, Christie, P, Chung, J, Chwastowski, M J M, Codrington, R, Corliss, J G, Cramer, H J, Crawford, X, Cui, A, Davila Leyva, L C, De Silva, R R, Debbe, T G, Dedovich, J, Deng, R, Derradi de Souza, S, Dhamija, L, Didenko, F, Ding, P, Djawotho, X, Dong, J L, Drachenberg, J E, Draper, C M, Du, L E, Dunkelberger, J C, Dunlop, L G, Efimov, M, Elnimr, J, Engelage, G, Eppley, L, Eun, O, Evdokimov, R, Fatemi, J, Fedorisin, R G, Fersch, P, Filip, E, Finch, Y, Fisyak, C A, Gagliardi, D R, Gangadharan, F, Geurts, S, Gliske, Y N, Gorbunov, O G, Grebenyuk, D, Grosnick, S, Gupta, W, Guryn, B, Haag, O, Hajkova, A, Hamed, L-X, Han, J W, Harris, J P, Hays-Wehle, S, Heppelmann, A, Hirsch, G W, Hoffmann, D J, Hofman, S, Horvat, B, Huang, H Z, Huang, P, Huck, T J, Humanic, L, Huo, G, Igo, W W, Jacobs, C, Jena, J, Joseph, E G, Judd, S, Kabana, K, Kang, J, Kapitan, K, Kauder, H W, Ke, D, Keane, A, Kechechyan, A, Kesich, D, Kettler, D P, Kikola, J, Kiryluk, A, Kisiel, V, Kizka, S R, Klein, D D, Koetke, T, Kollegger, J, Konzer, I, Koralt, L, Koroleva, W, Korsch, L, Kotchenda, P, Kravtsov, K, Krueger, L, Kumar, M A C, Lamont, J M, Landgraf, S, LaPointe, J, Lauret, A, Lebedev, R, Lednicky, J H, Lee, W, Leight, M J, LeVine, C, Li, L, Li, W, Li, X, Li, Y, Li, Z M, Li, L M, Lima, M A, Lisa, F, Liu, T, Ljubicic, W J, Llope, R S, Longacre, Y, Lu, X, Luo, A, Luszczak, G L, Ma, Y G, Ma, D P, Mahapatra, R, Majka, O I, Mall, S, Margetis, C, Markert, H, Masui, H S, Matis, D, McDonald, T S, McShane, S, Mioduszewski, M K, Mitrovski, Y, Mohammed, B, Mohanty, B, Morozov, M G, Munhoz, M K, Mustafa, M, Naglis, B K, Nandi, Md, Nasim, T K, Nayak, L V, Nogach, G, Odyniec, A, Ogawa, K, Oh, A, Ohlson, V, Okorokov, E W, Oldag, R A N, Oliveira, D, Olson, M, Pachr, B S, Page, S K, Pal, Y X, Pan, Y, Pandit, Y, Panebratsev, T, Pawlak, B, Pawlik, H, Pei, C, Perkins, W, Peryt, P, Pile, M, Planinic, J, Pluta, D, Plyku, N, Poljak, J, Porter, A M, Poskanzer, C B, Powell, D, Prindle, C, Pruneau, N K, Pruthi, M, Przybycien, P R, Pujahari, J, Putschke, H, Qiu, R, Raniwala, S, Raniwala, R L, Ray, R, Redwine, R, Reed, C K, Riley, H G, Ritter, J B, Roberts, O V, Rogachevskiy, J L, Romero, L, Ruan, J, Rusnak, N R, Sahoo, I, Sakrejda, S, Salur, J, Sandweiss, E, Sangaline, A, Sarkar, J, Schambach, R P, Scharenberg, A M, Schmah, N, Schmitz, T R, Schuster, J, Seele, J, Seger, P, Seyboth, N, Shah, E, Shahaliev, M, Shao, B, Sharma, M, Sharma, S S, Shi, Q Y, Shou, E P, Sichtermann, R N, Singaraju, M J, Skoby, N, Smirnov, D, Solanki, P, Sorensen, U G, deSouza, H M, Spinka, B, Srivastava, T D S, Stanislaus, S G, Steadman, J R, Stevens, R, Stock, M, Strikhanov, B, Stringfellow, A A P, Suaide, M C, Suarez, M, Sumbera, X M, Sun, Y, Sun, Z, Sun, B, Surrow, D N, Svirida, T J M, Symons, A, Szanto de Toledo, J, Takahashi, A H, Tang, Z, Tang, L H, Tarini, T, Tarnowsky, D, Thein, J H, Thomas, J, Tian, A R, Timmins, D, Tlusty, M, Tokarev, T A, Trainor, S, Trentalange, R E, Tribble, P, Tribedy, B A, Trzeciak, O D, Tsai, J, Turnau, T, Ullrich, D G, Underwood, G, Van Buren, G, van Nieuwenhuizen, J A, Vanfossen, R, Varma, G M S, Vasconcelos, F, Videbæk, Y P, Viyogi, S, Vokal, S A, Voloshin, A, Vossen, M, Wada, F, Wang, G, Wang, H, Wang, J S, Wang, Q, Wang, X L, Wang, Y, Wang, G, Webb, J C, Webb, G D, Westfall, C, Whitten, H, Wieman, S W, Wissink, R, Witt, W, Witzke, Y F, Wu, Z, Xiao, W, Xie, K, Xin, H, Xu, N, Xu, Q H, Xu, W, Xu, Y, Xu, Z, Xu, L, Xue, Y, Yang, P, Yepes, Y, Yi, K, Yip, I-K, Yoo, M, Zawisza, H, Zbroszczyk, J B, Zhang, S, Zhang, W M, Zhang, X P, Zhang, Y, Zhang, Z P, Zhang, F, Zhao, J, Zhao, C, Zhong, X, Zhu, Y H, Zhu, and Y, Zoulkarneeva
Abstract: STAR's measurements of directed flow (v1) around midrapidity for π±, K±, KS0, p, and p[over ¯] in Au+Au collisions at √[sNN]=200 GeV are presented. A negative v1(y) slope is observed for most of produced particles (π±, K±, KS0, and p[over ¯]). In 5%-30% central collisions, a sizable difference is present between the v1(y) slope of protons and antiprotons, with the former being consistent with zero within errors. The v1 excitation function is presented. Comparisons to model calculations (RQMD, UrQMD, AMPT, QGSM with parton recombination, and a hydrodynamics model with a tilted source) are made. For those models which have calculations of v1 for both pions and protons, none of them can describe v1(y) for pions and protons simultaneously. The hydrodynamics model with a tilted source as currently implemented cannot explain the centrality dependence of the difference between the v1(y) slopes of protons and antiprotons.
Published: 2011

89. Measurements of Higher Order Flow Harmonics inAu+AuCollisions atsNN=200 GeV

Author: R. Pak, Vladimir Samsonov, Beomkyu Kim, K. Boyle, N. Kamihara, Wei Xie, Ajit Kumar Mohanty, T. A. Shibata, T. Sato, Kazuyoshi Kurita, F. Matathias, M. Ouchida, A. Drees, Tamas Ferenc Csorgo, Kensuke Homma, E. Richardson, K. N. Barish, D. Isenhower, A. Toia, Maya Hachiya Shimomura, Y. I. Makdisi, V. S. Pantuev, A. Yu. Semenov, J. L. Nagle, M. I. Nagy, D. Watanabe, P. Constantin, M. D. Malik, E. Vznuzdaev, J. Hamblen, S. Tarafdar, N. Means, S. P. Sorensen, K. I. Hahn, B. Bassalleck, T. Kempel, Dong-Hun Kim, M. J. Tannenbaum, H. Torii, Eva Haslum, B. Lenzi, Tadaaki Isobe, K. Karatsu, C. Silvestre, Marisilvia Donadelli, V. Bumazhnov, S. Afanasiev, S. Sano, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Yokkaichi, B. Meredith, O. Chvala, P. L. McGaughey, Johannes Peter Wessels, Andry Malala Rakotozafindrabe, J. Newby, John Hill, Toru Sugitate, M. Konno, Anne Marie Sickles, R. Tanabe, K. Watanabe, Alice Mignerey, D. Hornback, M. L. Brooks, S. Butsyk, Y. J. Mao, François Fleuret, K. Okada, B. Sahlmueller, J. H. Kang, J. P. Wood, J. S. Haggerty, Seong H. Kim, A. V. Kazantsev, W. A. Zajc, A. Taranenko, V. Baublis, A. Denisov, H. En'yo, R. A. Soltz, K. Shoji, Y. Tanaka, Kazushi Miki, Brajesh K. Singh, X. He, J. T. Mitchell, M. Chiu, T. Ichihara, S. Zhou, M. J. Leitch, J. G. Lajoie, Takahiro Fusayasu, K. A. Drees, L. Tomášek, V. Cianciolo, Sergey Fokin, T. Horaguchi, M. Grosse Perdekamp, P. W. Stankus, M. E. Connors, Y. Aramaki, C. A. Ogilvie, V. Peresedov, Alexander Malakhov, D. Silvermyr, S. D. Rolnick, P. Mikeš, Kisung Lee, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, R. Seidl, Vladislav Manko, Takao Sakaguchi, T. K. Hemmick, L. S. Zolin, G. R. Young, W. J. Park, Christopher Rosen, A. Yanovich, I. J. Choi, A. Kravitz, K. B. Lee, M. Slunečka, K. Tanida, Rushan Han, O. Drapier, J. Koster, Frank Ellinghaus, E. J. Desmond, E. R. Kinney, D. P. Morrison, Y. J. Kwon, M. Kurosawa, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, J. M. Durham, Y. Onuki, Peter Christiansen, A. K. Purwar, K. Fujiwara, A. D. Frawley, D. Winter, S. Belikov, D. Yu Peressounko, S. N. White, Y. L. Yamaguchi, H. Masui, Zvi Hirsh Citron, Y. S. Lai, K. Nakano, Y. Ikeda, S. Campbell, Yasuo Miake, C. L. Woody, A. Berdnikov, A. A. Bickley, E. J. Mannel, W. E. Sondheim, D. Ivanischev, Jan Rak, R. Lacey, P. A. Rukoyatkin, K. Das, E. P. Hartouni, P. Chung, D. Roach, K. M. Kijima, M. Togawa, E. Vazquez-Zambrano, R. Granier de Cassagnac, A. Adare, L. Kochenda, M. Issah, P. Tarján, J. Park, B. Love, L. Baksay, C. Vale, Minghui Liu, H. Qu, M. Heffner, A. Datta, S. Huang, C. Pinkenburg, Kenneth Francis Read, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, Christine Angela Aidala, H. A. Gustafsson, Senta Greene, H. Pei, Xingguo Li, A. G. Litvinenko, E. Leitner, D. Kotchetkov, V. Singh, Y. Nakamiya, C. Zhang, Hideki Hamagaki, K. Aoki, A. T. Basye, G. David, M. Gonin, W. Holzmann, G. Roche, P. Ružička, Y. Tsuchimoto, B. Fadem, E. O'Brien, K. Sakashita, A. Kozlov, R. Seto, K. S. Sim, G. Baksay, O. Dietzsch, Viktor Riabov, E. T. Atomssa, A. Sukhanov, H. Pereira, I. V. Sourikova, T. L. Thomas, Y. Morino, I. Danchev, R. Yang, I. E. Yushmanov, Y. J. Kim, Ryugo S. Hayano, H. Valle, Dipanwita Dutta, K. Imai, Y. Riabov, Alexei Khanzadeev, Kenta Shigaki, M. Nguyen, E. Stenlund, A. S. Nyanin, Rachid Nouicer, H. W. Van Hecke, M. Proissl, Julia Velkovska, Jason Kamin, Eunja Kim, Jen-Chieh Peng, T. V. Moukhanova, Charles Maguire, S. P. Stoll, M. Rosati, R. Vértesi, A. Kiss, Inkyu Park, Henner Buesching, E. Kistenev, Xiong Wang, A. A. Vinogradov, S. S.E. Rosendahl, Steve Edwards, Dong Jo Kim, G. Bunce, J. E. Frantz, Jiangyong Jia, Y. Goto, A. Veicht, Marcus Hohlmann, L. A. Linden Levy, D. Jouan, S. Bathe, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, S. Dairaku, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, F. Wei, Kyeongpil Lee, S. Sawada, J. Ying, A. Franz, M. Virius, J. Ide, C. Y. Chi, C. Baumann, C. H. Chen, S. Kametani, C. P. Singh, B. M. Johnson, A. Glenn, A. Isupov, J. Sziklai, Jongmin Lee, Brian Cole, D. Lynch, D. S. Jumper, T. Dahms, I. Ravinovich, M. Wysocki, M. Bai, C. M. Camacho, M. Naglis, Zhiying You, R. Bennett, M. Kawashima, M. Finger, Prashant Shukla, C. L. Silva, S. F. Pate, H. Al-Bataineh, Masayasu Ishihara, V. Papavassiliou, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, E. H. Kim, K. Sedgwick, A. Deshpande, Y. Watanabe, I. Younus, B. Komkov, Norio Saito, Hongfang Liu, D. E. Fields, M. A. L. Leite, B. V. Jacak, M. McCumber, Y. Fukao, R. Belmont, J. S. Kapustinsky, V. Babintsev, G. S. Kyle, J. Hanks, James Alexander, R. Averbeck, Byung-Sik Hong, T. Hester, Sung Keun Park, N. N. Ajitanand, A. Bazilevsky, Philippe Rosnet, Alexandre Lebedev, D. M. Lee, Takahiro Nakamura, K. Kiriluk, Susumu Oda, N. A. Sparks, A. Durum, K. Yamaura, Martin Purschke, N. Grau, Motoi Inaba, R. M. Wright, Mate Csanad, R. P. Pisani, A. Morreale, Z. Fraenkel, R. K. Choudhury, B. Azmoun, A. Král, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, P. Liebing, K. S. Joo, S. Esumi, D. Sharma, and R. Ichimiya
Subjects: Nuclear physics, Physics, Harmonics, Monte Carlo method, General Physics and Astronomy, Entropy (information theory), Rapidity, Boundary value problem, Nuclear Experiment, Anisotropy, Collision, Glauber
Abstract: Flow coefficients nu(n) for n = 2, 3, 4, characterizing the anisotropic collective flow in Au + Au collisions at root s(NN) = 200 GeV, are measured relative to event planes Psi(n), determined at large rapidity. We report nu(n) as a function of transverse momentum and collision centrality, and study the correlations among the event planes of different order n. The nu(n) are well described by hydrodynamic models which employ a Glauber Monte Carlo initial state geometry with fluctuations, providing additional constraining power on the interplay between initial conditions and the effects of viscosity as the system evolves. This new constraint can serve to improve the precision of the extracted shear viscosity to entropy density ratio eta/s.
Published: 2011

90. J/ψsuppression at forward rapidity in Au+Au collisions atsNN=200GeV

Author: K. Sakashita, Sung Keun Park, K. S. Joo, N. N. Ajitanand, K. A. Drees, Takahiro Nakamura, Y. J. Kwon, Jason Kamin, Susumu Oda, R. A. Soltz, M. Grosse Perdekamp, M. E. Connors, S. Belikov, S. Esumi, K. Tanida, Peter Christiansen, P. Tarján, D. Winter, S. P. Stoll, D. Roach, K. M. Kijima, A. Durum, Vladimir Samsonov, D. Kotchetkov, Y. Fukao, D. Sharma, Minghui Liu, R. Ichimiya, S. S.E. Rosendahl, G. Bunce, T. Hester, B. Azmoun, A. Král, Y. J. Mao, M. Heffner, E. H. Kim, K. Das, E. P. Hartouni, K. Yamaura, Kenneth Francis Read, D. Jouan, Tamas Ferenc Csorgo, V. S. Pantuev, Senta Greene, A. T. Basye, B. Fadem, E. O'Brien, M. Oka, J. H. Kang, J. S. Haggerty, Xingguo Li, N. A. Sparks, J. L. Nagle, J. Hamblen, Johannes Peter Wessels, M. Gonin, R. Pak, A. Dion, Hongfang Liu, D. E. Fields, N. Kamihara, K. Okada, B. Sahlmueller, H. En'yo, C. Silvestre, Marisilvia Donadelli, V. Bumazhnov, M. J. Leitch, B. V. Jacak, W. A. Zajc, H. Hamagaki, A. Sukhanov, H. Pereira, A. V. Kazantsev, M. Kurosawa, Andry Malala Rakotozafindrabe, M. I. Nagy, Kazuyoshi Kurita, N. Grau, M. McCumber, Y. Morino, V. Baublis, Atsushi Taketani, G. S. Kyle, D. Watanabe, A. Denisov, M. D. Malik, R. Tanabe, E. Vznuzdaev, A. Drees, A. Enokizono, P. Liebing, James Alexander, J. Hanks, R. Averbeck, Byung-Sik Hong, M. Wysocki, A. Bazilevsky, Motoi Inaba, R. M. Wright, Martin Purschke, Sergey Fokin, P. Chung, Rushan Han, L. Tomášek, S. P. Sorensen, Philippe Rosnet, Beomkyu Kim, K. Boyle, Y. Tanaka, H. Å Gustafsson, Wei Xie, M. Chiu, Alexandre Lebedev, C. A. Ogilvie, Shinhong Kim, O. Chvala, Mate Csanad, Kisung Lee, T. K. Hemmick, D. M. Lee, A. Morreale, J. M. Durham, Yasuo Miake, Y. S. Lai, K. Kiriluk, A. Datta, E. J. Desmond, J. G. Lajoie, B. Komkov, P. Mikeš, L. Kochenda, M. Issah, R. K. Choudhury, A. K. Purwar, K. Fujiwara, Taku Gunji, H. Gong, J. Seele, I. J. Choi, Norio Saito, A. Kravitz, L. Baksay, M. A. L. Leite, F. Kajihara, S. Sawada, H. Pei, J. Ying, A. Franz, M. Togawa, E. Vazquez-Zambrano, Y. L. Yamaguchi, R. Belmont, J. S. Kapustinsky, V. Babintsev, O. Dietzsch, R. P. Pisani, S. Butsyk, Maya Hachiya Shimomura, J. Park, C. M. Camacho, Prashant Shukla, C. Zhang, E. T. Atomssa, S. Zhou, H. Valle, S. F. Pate, T. C. Awes, Kyoichiro Ozawa, T. Liška, S. D. Rolnick, J. S. Bok, P. Ružička, Dipanwita Dutta, E. Leitner, H. Al-Bataineh, Tadaaki Isobe, Julia Velkovska, A. Y. Semenov, M. Rosati, Ajit Kumar Mohanty, T. A. Shibata, Y. Tsuchimoto, Y. I. Makdisi, Viktor Riabov, T. Sato, S. Yokkaichi, V. Papavassiliou, A. A. Vinogradov, I. E. Yushmanov, Jiangyong Jia, Alexei Khanzadeev, P. L. McGaughey, Y. Goto, E. Stenlund, D. Isenhower, H. Qu, Y. Ikeda, E. J. Mannel, H. W. Van Hecke, A. Toia, C. Pinkenburg, T. V. Moukhanova, S. Bathe, K. Aoki, R. Vértesi, Agneta Oskarsson, G. Roche, G. David, Y. Berdnikov, Y. Akiba, M. Mishra, J. E. Frantz, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, M. Naglis, Charles Maguire, A. Kiss, C. L. Silva, Henner Buesching, Steve Edwards, Masayasu Ishihara, Marcus Hohlmann, C. Baumann, S. Kametani, L. A. Linden Levy, A. Deshpande, C. P. Singh, B. M. Johnson, A. Isupov, J. Sziklai, M. J. Tannenbaum, Brian Cole, E. Kistenev, H. Torii, T. Kempel, Dong-Hun Kim, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, F. Wei, Kyeongpil Lee, J. T. Mitchell, J. Ide, R. Seidl, Vladislav Manko, M. Slunečka, C. Y. Chi, Y. Watanabe, K. Watanabe, Alice Mignerey, K. Shoji, S. Dairaku, V. Cianciolo, M. Virius, C. H. Chen, T. Horaguchi, I. Younus, P. W. Stankus, A. Glenn, I. Ravinovich, M. Bai, Takao Sakaguchi, D. Kawall, C. Vale, A. D. Frawley, Zhiying You, H. Themann, S. Huang, R. Bennett, M. Kawashima, M. Finger, Christine Angela Aidala, W. Holzmann, M. Ouchida, N. Means, Jongmin Lee, J. Murata, Y. Nakamiya, X. He, Y. Aramaki, V. Peresedov, D. Lynch, T. L. Thomas, J. Koster, Gerd Joachim Kunde, I. Shein, D. S. Jumper, G. Baksay, H. Masui, Ryugo S. Hayano, A. A. Bickley, Y. Riabov, T. Dahms, Kenta Shigaki, K. Sedgwick, M. Nguyen, K. N. Barish, A. S. Nyanin, Rachid Nouicer, M. Proissl, Y. J. Kim, T. Ichihara, J. P. Wood, C. L. Woody, A. Berdnikov, Alexander Milov, Takahiro Fusayasu, S. Sano, I. Nakagawa, Alexander Malakhov, R. Luechtenborg, T. Engelmore, K. Karatsu, D. Silvermyr, O. Drapier, L. S. Zolin, W. J. Park, Christopher Rosen, Frank Ellinghaus, A. Yanovich, E. R. Kinney, S. N. White, D. P. Morrison, S. Campbell, Anne Marie Sickles, Zvi Hirsh Citron, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, K. Nakano, F. Matathias, V. Singh, I. V. Sourikova, M. L. Brooks, W. E. Sondheim, D. Ivanischev, Kensuke Homma, B. Love, P. A. Rukoyatkin, G. R. Young, B. Meredith, Z. Fraenkel, E. Richardson, John Hill, Toru Sugitate, Eunja Kim, Jen-Chieh Peng, K. S. Sim, P. Constantin, A. G. Litvinenko, Inkyu Park, Xiong Wang, K. I. Hahn, Dong Jo Kim, B. Bassalleck, R. Yang, A. Veicht, François Fleuret, A. Kozlov, M. Konno, K. Imai, R. Seto, Y. Onuki, D. Y.-U. Peressounko, Jan Rak, R. Lacey, R. Granier de Cassagnac, A. Adare, I. Danchev, S. Tarafdar, Eva Haslum, B. Lenzi, S. Afanasiev, J. Newby, D. Hornback, A. Taranenko, Kazushi Miki, Brajesh K. Singh, and K. B. Lee
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Quark–gluon plasma, Binary number, Parton, Rapidity, Charm (quantum number), Nuclear Experiment, Breakup, Nuclear matter, Gluon
Abstract: Heavy quarkonia are observed to be suppressed in relativistic heavy-ion collisions relative to their production in p + p collisions scaled by the number of binary collisions. In order to determine if this suppression is related to color screening of these states in the produced medium, one needs to account for other nuclear modifications including those in cold nuclear matter. In this paper, we present new measurements from the PHENIX 2007 data set of J/psi yields at forward rapidity (1.2 < vertical bar y vertical bar < 2.2) in Au + Au collisions at root s(NN) = 200 GeV. The data confirm the earlier finding that the suppression of J/. at forward rapidity is stronger than at midrapidity, while also extending the measurement to finer bins in collision centrality and higher transverse momentum (p(T)). We compare the experimental data to the most recent theoretical calculations that incorporate a variety of physics mechanisms including gluon saturation, gluon shadowing, initial-state parton energy loss, cold nuclear matter breakup, color screening, and charm recombination. We find J/psi suppression beyond cold-nuclear-matter effects. However, the current level of disagreement between models and d + Au data precludes using these models to quantify the hot-nuclear-matter suppression.
Published: 2011

91. Suppression of Back-to-Back Hadron Pairs at Forward Rapidity ind+AuCollisions atsNN=200 GeV

Author: F. Matathias, Kensuke Homma, E. Richardson, L. Tomášek, K. I. Hahn, Y. Fukao, B. Bassalleck, Alexei Khanzadeev, M. Konno, T. Hester, A. Kiss, E. Stenlund, J. B. Choi, Henner Buesching, Steve Edwards, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, Y. Nakamiya, G. Baksay, S. Belikov, Y. J. Kim, Marcus Hohlmann, C. Vale, K. V. Dharmawardane, X. He, N. Grau, X. Jiang, H. Pei, Christine Angela Aidala, K. S. Sim, Maya Hachiya Shimomura, Y. I. Makdisi, T. Horaguchi, M. Rosati, K. Sakashita, Hongfang Liu, D. E. Fields, C. Silvestre, T. Murakami, Y. Aramaki, Martin Purschke, V. Peresedov, Robert Vertesi, B. V. Jacak, Y. Ikeda, E. J. Mannel, C. L. Woody, A. Berdnikov, Alexander Milov, T. C. Awes, Kyoichiro Ozawa, T. Liška, Marisilvia Donadelli, V. Bumazhnov, Motoi Inaba, B. Meredith, L. A. Linden Levy, R. Yang, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, C. Pinkenburg, J. Koster, J. S. Bok, Jun Kikuchi, M. McCumber, R. M. Wright, A. Caringi, J. H. Bhom, E. R. Kinney, M. Gonin, S. Tarafdar, John Hill, Toru Sugitate, D. P. Morrison, A. Morreale, S. Campbell, R. Tanabe, S. Taneja, H. Masui, J. Jin, Jason Kamin, Mate Csanad, Jongmin Lee, D. Lynch, T. Kempel, E. M. Takagui, A. Sukhanov, Jiangyong Jia, Z. Fraenkel, Y. Goto, M. Naglis, S. Bathe, G. Roche, M. J. Tannenbaum, Y. J. Kwon, S. Sawada, J. Ying, A. Franz, T. V. Moukhanova, C. Baumann, D. Watanabe, H. Pereira, Y. Morino, D. S. Jumper, K. Imai, H. Torii, K. A. Drees, R. K. Choudhury, François Fleuret, J. Hanks, S. P. Stoll, M. D. Malik, Dmitry Blau, T. Dahms, Agneta Oskarsson, H. A. Gustafsson, Tatsuya Chujo, B. Azmoun, A. Král, Y. Onuki, E. Vznuzdaev, C. P. Singh, I. V. Sourikova, T. Ichihara, Rushan Han, M. Nihashi, B. M. Johnson, Sung Keun Park, Charles Maguire, Masayasu Ishihara, S. Dairaku, I. Tserruya, Yu. Efremenko, Minghui Liu, A. Kim, Jan Rak, S. S.E. Rosendahl, K. N. Barish, G. Bunce, Takahiro Fusayasu, Vladimir Samsonov, R. J. Petti, Eva Haslum, E. J. Desmond, Y. Berdnikov, G. Grim, K. B. Lee, N. N. Ajitanand, V. Singh, R. Lacey, S. Nam, Alexander Malakhov, Y. Akiba, D. Silvermyr, M. Oka, M. Togawa, M. Heffner, R. Granier de Cassagnac, Kenneth Francis Read, A. Adare, P. Ružička, S. Nagamiya, L. S. Zolin, W. J. Park, Christopher Rosen, M. Virius, A. Isupov, D. Kawall, H. Themann, E. Vazquez-Zambrano, M. Kasai, Tamas Ferenc Csorgo, Alice Mignerey, J. Sziklai, S. Sano, R. P. Pisani, A. Yanovich, O. Dietzsch, J. L. Nagle, E. T. Atomssa, L. D'Orazio, D. Jouan, H. Valle, Viktor Riabov, E. Kistenev, Atsushi Taketani, P. Liebing, A. Dion, Takahiro Nakamura, M. I. Nagy, S. Yokkaichi, Dipanwita Dutta, Brian Cole, S. N. White, Deepa Thomas, C. H. Chen, R. Pak, J. Murata, Y. Tsuchimoto, Y. Iwanaga, K. S. Joo, P. Lichtenwalner, M. Ouchida, K. Das, M. L. Brooks, K. Karatsu, Zvi Hirsh Citron, Johannes Peter Wessels, Julia Velkovska, A. Glenn, Susumu Oda, Takao Sakaguchi, B. Komkov, Y. J. Mao, K. Watanabe, S. Afanasiev, K. Nakano, I. Ravinovich, Anne Marie Sickles, W. E. Sondheim, N. Means, R. S. Towell, Aaron Angerami, Gerd Joachim Kunde, Eunja Kim, I. E. Yushmanov, B. Love, A. D. Frawley, D. Ivanischev, A. Durum, D. Roach, P. A. Rukoyatkin, I. Garishvili, M. Bai, I. Shein, N. Apadula, Jen-Chieh Peng, P. L. McGaughey, Beomkyu Kim, K. Boyle, Vaclav Vrba, Norio Saito, Tsutomu Mibe, Klaus Johannes Reygers, J. Newby, Kazuyoshi Kurita, F. Wei, W. A. Zajc, M. K. Dayananda, K. M. Kijima, S. Huang, J. H. Kang, K. Shoji, J. S. Haggerty, M. A. L. Leite, C. Oakley, A. G. Litvinenko, A. Drees, V. Baublis, A. Denisov, V. Cianciolo, K. Sedgwick, Inkyu Park, Rui Wei, W. Holzmann, K. Yamaura, V. S. Pantuev, Sergey Fokin, Zhiying You, M. Wysocki, S. Esumi, A. Deshpande, Xiong Wang, D. Sharma, Z. Conesa del Valle, Dong Jo Kim, P. W. Stankus, G. R. Young, R. Bennett, M. Kawashima, R. Ichimiya, Y. Tanaka, T. L. Thomas, M. Finger, A. Veicht, R. Seto, D. Hornback, M. Chiu, R. Belmont, J. S. Kapustinsky, Xingguo Li, J. E. Frantz, Ryugo S. Hayano, V. Babintsev, J. Hamblen, Y. S. Lai, C. A. Ogilvie, C. Y. Chi, Y. Watanabe, G. S. Kyle, I. Danchev, Kisung Lee, T. K. Hemmick, Y. Riabov, Kenta Shigaki, I. Younus, Prashant Shukla, J. M. Durham, H. J. Moon, L. Baksay, Yasuo Miake, S. P. Sorensen, M. Nguyen, K. Fujiwara, H. Qu, James Alexander, K. Okada, A. S. Nyanin, S. F. Pate, R. Averbeck, A. Taranenko, Hideki Hamagaki, K. Aoki, Byung-Sik Hong, A. Bazilevsky, L. Kochenda, M. Issah, Rachid Nouicer, O. Chvala, M. Proissl, B. Sahlmueller, G. David, Y. L. Yamaguchi, Kazushi Miki, H. En'yo, Alexandre Lebedev, M. J. Leitch, D. M. Lee, Ke. Nakamura, J. G. Lajoie, Brajesh K. Singh, H. Al-Bataineh, I. J. Choi, A. Kravitz, H. W. Van Hecke, V. Papavassiliou, R. A. Soltz, M. Grosse Perdekamp, M. E. Connors, K. Tanida, T. Jones, Peter Christiansen, D. Winter, D. Yu Peressounko, Senta Greene, A. T. Basye, B. Fadem, E. O'Brien, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, D. Isenhower, A. Toia, M. Kurosawa, A. Enokizono, P. Chung, A. Datta, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Butsyk, S. Zhou, S. D. Rolnick, and A. V. Kazantsev
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Nuclear Theory, Hadron, General Physics and Astronomy, Parton, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Impact parameter, Nuclear Experiment, 010306 general physics, Nucleon, Relativistic Heavy Ion Collider
Abstract: Back-to-back hadron pair yields in d + Au and p + p collisions at root S-NN = 200 GeV were measured with the PHENIX detector at the Relativistic Heavy Ion Collider. Rapidity separated hadron pairs were detected with the trigger hadron at pseudorapidity vertical bar eta vertical bar < 0: 35 and the associated hadron at forward rapidity (deuteron direction, 3.0< eta < 3.8). Pairs were also detected with both hadrons measured at forward rapidity; in this case, the yield of back-to-back hadron pairs in d + Au collisions with small impact parameters is observed to be suppressed by a factor of 10 relative to p + p collisions. The kinematics of these pairs is expected to probe partons in the Au nucleus with a low fraction x of the nucleon momenta, where the gluon densities rise sharply. The observed suppression as a function of nuclear thickness, p(T), and eta points to cold nuclear matter effects arising at high parton densities.
Published: 2011

92. Heavy-quark production inp+pand energy loss and flow of heavy quarks in Au + Au collisions atsNN=200GeV

Author: S. Y. Fung, M. Chiu, Maya Hachiya Shimomura, T. A. Shibata, Y. I. Makdisi, Z. Fraenkel, Steven E. Skutnik, S. Bathe, John Hill, Agneta Oskarsson, V. S. Pantuev, H. A. Torii, Toru Sugitate, L. D. Isenhower, Y. Berdnikov, Y. Akiba, M. Harvey, M. J. Tannenbaum, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, D. Isenhower, A. Toia, L. Mašek, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, Vaclav Vrba, Klaus Johannes Reygers, H. Qu, C. Vale, Junji Tojo, B. S. Chang, Christine Angela Aidala, J. Klay, D. Mukhopadhyay, S. Rembeczki, M. Rosati, François Fleuret, D. Bucher, B. Forestier, I. Ravinovich, Y. Nagata, J. Gosset, J. P. Sullivan, R. Vértesi, K. Okada, B. Sahlmueller, H. En'yo, P. Constantin, Saskia Mioduszewski, S. N. White, S. F. Pate, Anne Marie Sickles, S. Kelly, Hideki Hamagaki, K. Aoki, G. David, F. Matathias, S. S. Ryu, M. J. Leitch, M. Gonin, J. Chiba, N. N. Ajitanand, Mate Csanad, P. Tarján, A. A. Vinogradov, Henrik Tydesjö, K. Nakano, Kensuke Homma, S. Chernichenko, H. Lim, B. Bassalleck, M. Konno, Y. Nakamiya, G. C. Mishra, G. Baksay, M. T. Bjorndal, R. Bennett, Ahmed Al-Jamel, M. Finger, Y. L. Yamaguchi, B. Komkov, Takao Sakaguchi, H. Al-Bataineh, W. E. Sondheim, Norio Saito, Takahiro Nakamura, M. A. L. Leite, C. Klein-Boesing, K. Dehmelt, A. Kiss, D. Kawall, C. L. Woody, Z. Yasin, Henner Buesching, Jiangyong Jia, Y. Goto, O. Zaudtke, A. D. Frawley, T. Tabaru, Jen-Chieh Peng, S. Yokkaichi, P. A. Rukoyatkin, H. Pei, G. R. Young, J. M. Burward-Hoy, H. Pereira, V. I. Kochetkov, Alexei Khanzadeev, J. M. Heuser, T. Ichihara, Osamu Jinnouchi, S. H. Aronson, J. Jin, E. M. Takagui, Marcus Hohlmann, M. Virius, W. Holzmann, C. P. Singh, B. M. Johnson, J. Murata, B. Azmoun, A. Král, M. J. Kweon, Y. Le Bornec, Gerd Joachim Kunde, Matthew G. Reuter, Takahiro Fusayasu, I. D. Ojha, Alexander Malakhov, Susumu Oda, T. Shohjoh, A. Durum, W. C. Smith, V. Babintsev, K. O. Eyser, K. Fujiwara, C. R. Cleven, C. Haegemann, Y. Inoue, Y. Cobigo, D. Silvermyr, V. Papavassiliou, Sébastien Gadrat, A. Isupov, C. Suire, I. Shein, D. S. Brown, Jan Rak, Xiong Wang, J. G. Boissevain, I. V. Sourikova, Masashi Kaneta, R. Pak, N. Kamihara, X. He, O. O. Omiwade, V. Peresedov, Dong Jo Kim, E. Stenlund, H. Sakata, M. K. Lee, E. H. Kim, L. S. Zolin, David D'Enterria, P. J. Kroon, Dong-Hun Kim, P. D. Barnes, J. E. Frantz, Hiroaki Ohnishi, R. Lacey, J. Sziklai, W. J. Park, Alberto Baldisseri, R. Armendariz, C. Pinkenburg, A. Yanovich, M. Oka, S. K. Tuli, R. Granier de Cassagnac, Herve Borel, D. Lynch, A. Adare, M. Naglis, Senta Greene, D. E. Fields, K. Hasuko, B. V. Jacak, Brian Cole, R. P. Pisani, C. L. Silva, R. S. Towell, M. Stepanov, G. Roche, Kazuyoshi Kurita, H. Masui, A. K. Dubey, A. Glenn, O. Dietzsch, E. T. Atomssa, Masayasu Ishihara, Y. J. Mao, S. Kametani, A. Dion, Susumu Sato, I. Garishvili, Akio Kiyomichi, M. Mitrovski, A. Deshpande, M. McCumber, A. K. Purwar, H. Valle, Alexander Milov, I. Nakagawa, H. W. Van Hecke, V. L. Rykov, T. Dahms, A. A. Bickley, A. Drees, N. Grau, J. H. Kang, J. S. Haggerty, T. V. Moukhanova, K. Shoji, J. Kubart, O. Drapier, Frank Ellinghaus, B. E. Norman, Xiao-yan Li, N. Kurihara, S. Takagi, M. Ouchida, Nikolay Tyurin, Y. Watanabe, Atsushi Taketani, K. N. Barish, E. R. Kinney, I. Younus, D. P. Morrison, S. Campbell, E. O'Brien, R. A. Soltz, Julia Velkovska, P. W. Stankus, A. Soldatov, J. Asai, A. Enokizono, M. Wysocki, V. E. Semenov, M. B. Deaton, E. J. Desmond, M. N. Wagner, Y. Fukao, G. S. Kyle, A. Shevel, M. Grosse Perdekamp, Y. Tanaka, N. Willis, James Alexander, K. S. Sim, Tatsuya Chujo, Y. S. Lai, I. Tserruya, M. G. Hur, C. Y. Chi, Tae-Yeon Lee, J. Egdemir, M. Togawa, Yu. Efremenko, V. Singh, T. K. Shea, R. Averbeck, Martin Purschke, T. Hester, Robert F. Hobbs, Byung-Sik Hong, A. Bazilevsky, Y. Kwon, Joakim Nystrand, J. Park, M. L. Brooks, Florian Bauer, Philippe Rosnet, Jason Kamin, F. Gastineau, H. Hiejima, B. Love, Alexandre Lebedev, F. Staley, L. Baksay, K. Das, D. Winter, Charles Maguire, S. Leckey, D. Yu Peressounko, D. M. Lee, Marie Germain, S. P. Stoll, Eva Haslum, B. Lenzi, Shingo Sakai, Josh Moss, Kiyoshi Tanida, Xingguo Li, Debashish Pal, Y. Tsuchimoto, J. L. Drachenberg, S. Sawada, E. P. Hartouni, A. G. Litvinenko, K. Imai, E. Kistenev, Hirohiko Sato, J. Ying, A. Franz, T. L. Thomas, H. Harada, S. S.E. Rosendahl, G. Bunce, D. Kotchetkov, A. Kozlov, R. Seto, S. P. Sorensen, K. Haruna, Dylan Walker, B. Espagnon, V. Dzhordzhadze, S. Afanasiev, A. Morreale, V-N. Tram, I. E. Yushmanov, J. G. Lajoie, A. Churyn, D. Jouan, A. Ster, T. Hachiya, Motoi Inaba, I. J. Choi, A. Kravitz, Ryugo S. Hayano, A. Romana, J. Newby, K. S. Joo, Y. Riabov, Kenta Shigaki, C. A. Ogilvie, T. K. Hemmick, D. Hornback, M. Nguyen, A. Taranenko, Yasuo Miake, Kazushi Miki, S. Esumi, D. Sharma, A. S. Nyanin, L. Kochenda, Rachid Nouicer, T. Kawagishi, S. Belikov, L. Aphecetche, Minghui Liu, M. Heffner, C. Silvestre, Kenneth Francis Read, A. V. Kazantsev, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, L. Tomášek, P. Mikeš, Andry Malala Rakotozafindrabe, T. C. Awes, Kyoichiro Ozawa, T. Liška, Jun Kikuchi, Johannes Peter Wessels, Tadaaki Isobe, J. S. Chai, P. L. McGaughey, Rushan Han, M. N. Hagiwara, M. Issah, C. Zhang, J. Zimányi, S. Butsyk, Vladimir Samsonov, M. D. Malik, I. Otterlund, E. Vznuzdaev, Viktor Riabov, W. A. Zajc, Tamas Ferenc Csorgo, V. Baublis, A. Hadj Henni, J. L. Nagle, A. Denisov, V. Cianciolo, Sergey Fokin, T. Horaguchi, K. Boyle, H. Å Gustafsson, Wei Xie, S. Batsouli, H. Iinuma, M. C. McCain, A. P.T. Palounek, H. Kanou, Taku Gunji, H. Gong, J. Seele, F. Kajihara, H. Delagrange, S. Zhou, Y. S. Kim, J. L. Charvet, T. E. Miller, P. Chung, M. Holmes, and W. S. Emam
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Electron, 01 natural sciences, 7. Clean energy, Spectral line, Nuclear physics, Flow (mathematics), 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Anisotropy, Relativistic Heavy Ion Collider
Abstract: Transverse momentum spectra of electrons (p(T)(e)) from semileptonic weak decays of heavy-flavor mesons in the range of 0.3 < p(T)(e) < 9.0 GeV/c have been measured at midrapidity (|y| < 0.35) by the PHENIX experiment at the Relativistic Heavy Ion Collider in p + p and Au + Au collisions at root s(NN) = 200 GeV. In addition, the azimuthal anisotropy parameter v(2) has been measured for 0.3 < p(T)(e) < 5.0 GeV/c in Au + Au collisions. The substantial modification in the p(T)(e) spectra in Au + Au compared with p + p collisions as well as the nonzero v(2) indicate substantial interactions and flow of heavy quarks in traversing the produced medium. Comparisons of these observables with detailed theoretical calculations can be used to identify the nature of these interactions and to quantify their extent.
Published: 2011

93. Identified hadron compositions in p+p and Au+Au collisions at high transverse momenta at √S(NN)=200 GeV

Author: G, Agakishiev, M M, Aggarwal, Z, Ahammed, A V, Alakhverdyants, I, Alekseev, J, Alford, B D, Anderson, C D, Anson, D, Arkhipkin, G S, Averichev, J, Balewski, L S, Barnby, D R, Beavis, R, Bellwied, M J, Betancourt, R R, Betts, A, Bhasin, A K, Bhati, H, Bichsel, J, Bielcik, J, Bielcikova, L C, Bland, I G, Bordyuzhin, W, Borowski, J, Bouchet, E, Braidot, A V, Brandin, S G, Brovko, E, Bruna, S, Bueltmann, I, Bunzarov, T P, Burton, X Z, Cai, H, Caines, M Calderón de la Barca, Sánchez, D, Cebra, R, Cendejas, M C, Cervantes, P, Chaloupka, S, Chattopadhyay, H F, Chen, J H, Chen, J Y, Chen, L, Chen, J, Cheng, M, Cherney, A, Chikanian, W, Christie, P, Chung, M J M, Codrington, R, Corliss, J G, Cramer, H J, Crawford, X, Cui, A Davila, Leyva, L C, De Silva, R R, Debbe, T G, Dedovich, J, Deng, A A, Derevschikov, R Derradi, de Souza, L, Didenko, P, Djawotho, X, Dong, J L, Drachenberg, J E, Draper, C M, Du, J C, Dunlop, L G, Efimov, M, Elnimr, J, Engelage, G, Eppley, M, Estienne, L, Eun, O, Evdokimov, P, Fachini, R, Fatemi, J, Fedorisin, R G, Fersch, P, Filip, E, Finch, V, Fine, Y, Fisyak, C A, Gagliardi, D R, Gangadharan, F, Geurts, P, Ghosh, Y N, Gorbunov, A, Gordon, O G, Grebenyuk, D, Grosnick, A, Gupta, S, Gupta, W, Guryn, B, Haag, O, Hajkova, A, Hamed, L-X, Han, J W, Harris, J P, Hays-Wehle, S, Heppelmann, A, Hirsch, G W, Hoffmann, D J, Hofman, B, Huang, H Z, Huang, T J, Humanic, L, Huo, G, Igo, W W, Jacobs, C, Jena, J, Joseph, E G, Judd, S, Kabana, K, Kang, J, Kapitan, K, Kauder, H W, Ke, D, Keane, A, Kechechyan, D, Kettler, D P, Kikola, J, Kiryluk, A, Kisiel, V, Kizka, S R, Klein, D D, Koetke, T, Kollegger, J, Konzer, I, Koralt, L, Koroleva, W, Korsch, L, Kotchenda, P, Kravtsov, K, Krueger, L, Kumar, M A C, Lamont, J M, Landgraf, S, LaPointe, J, Lauret, A, Lebedev, R, Lednicky, J H, Lee, W, Leight, M J, LeVine, C, Li, L, Li, W, Li, X, Li, Y, Li, Z M, Li, L M, Lima, M A, Lisa, F, Liu, T, Ljubicic, W J, Llope, R S, Longacre, Y, Lu, E V, Lukashov, X, Luo, G L, Ma, Y G, Ma, D P, Mahapatra, R, Majka, O I, Mall, S, Margetis, C, Markert, H, Masui, H S, Matis, D, McDonald, T S, McShane, A, Meschanin, R, Milner, N G, Minaev, S, Mioduszewski, M K, Mitrovski, Y, Mohammed, B, Mohanty, M M, Mondal, B, Morozov, D A, Morozov, M G, Munhoz, M K, Mustafa, M, Naglis, B K, Nandi, Md, Nasim, T K, Nayak, L V, Nogach, S B, Nurushev, G, Odyniec, A, Ogawa, K, Oh, A, Ohlson, V, Okorokov, E W, Oldag, R A N, Oliveira, D, Olson, M, Pachr, B S, Page, S K, Pal, Y, Pandit, Y, Panebratsev, T, Pawlak, H, Pei, T, Peitzmann, C, Perkins, W, Peryt, P, Pile, M, Planinic, J, Pluta, D, Plyku, N, Poljak, J, Porter, A M, Poskanzer, C B, Powell, D, Prindle, C, Pruneau, N K, Pruthi, P R, Pujahari, J, Putschke, H, Qiu, R, Raniwala, S, Raniwala, R L, Ray, R, Redwine, R, Reed, H G, Ritter, J B, Roberts, O V, Rogachevskiy, J L, Romero, L, Ruan, J, Rusnak, N R, Sahoo, I, Sakrejda, S, Salur, J, Sandweiss, E, Sangaline, A, Sarkar, J, Schambach, R P, Scharenberg, A M, Schmah, N, Schmitz, T R, Schuster, J, Seele, J, Seger, I, Selyuzhenkov, P, Seyboth, N, Shah, E, Shahaliev, M, Shao, M, Sharma, S S, Shi, Q Y, Shou, E P, Sichtermann, F, Simon, R N, Singaraju, M J, Skoby, N, Smirnov, D, Solanki, P, Sorensen, U G, deSouza, H M, Spinka, B, Srivastava, T D S, Stanislaus, S G, Steadman, J R, Stevens, R, Stock, M, Strikhanov, B, Stringfellow, A A P, Suaide, M C, Suarez, M, Sumbera, X M, Sun, Y, Sun, Z, Sun, B, Surrow, D N, Svirida, T J M, Symons, A Szanto, de Toledo, J, Takahashi, A H, Tang, Z, Tang, L H, Tarini, T, Tarnowsky, D, Thein, J H, Thomas, J, Tian, A R, Timmins, D, Tlusty, M, Tokarev, T A, Trainor, S, Trentalange, R E, Tribble, P, Tribedy, B A, Trzeciak, O D, Tsai, T, Ullrich, D G, Underwood, G, Van Buren, G, van Nieuwenhuizen, J A, Vanfossen, R, Varma, G M S, Vasconcelos, A N, Vasiliev, F, Videbæk, Y P, Viyogi, S, Vokal, S A, Voloshin, M, Wada, M, Walker, F, Wang, G, Wang, H, Wang, J S, Wang, Q, Wang, X L, Wang, Y, Wang, G, Webb, J C, Webb, G D, Westfall, C, Whitten, H, Wieman, S W, Wissink, R, Witt, W, Witzke, Y F, Wu, Z, Xiao, W, Xie, H, Xu, N, Xu, Q H, Xu, W, Xu, Y, Xu, Z, Xu, L, Xue, Y, Yang, P, Yepes, K, Yip, I-K, Yoo, M, Zawisza, H, Zbroszczyk, W, Zhan, J B, Zhang, S, Zhang, W M, Zhang, X P, Zhang, Y, Zhang, Z P, Zhang, F, Zhao, J, Zhao, C, Zhong, X, Zhu, Y H, Zhu, and Y, Zoulkarneeva
Abstract: We report transverse momentum (p(T)≤15 GeV/c) spectra of π(±), K(±), p, p[over ¯], K(S)(0), and ρ(0) at midrapidity in p+p and Au+Au collisions at √S(NN)=200 GeV. Perturbative QCD calculations are consistent with π(±) spectra in p+p collisions but do not reproduce K and p(p[over ¯]) spectra. The observed decreasing antiparticle-to-particle ratios with increasing p(T) provide experimental evidence for varying quark and gluon jet contributions to high-p(T) hadron yields. The relative hadron abundances in Au+Au at p(T)≳8 GeV/c are measured to be similar to the p+p results, despite the expected Casimir effect for parton energy loss.
Published: 2011

94. Cold Nuclear Matter Effects onJ/ψYields as a Function of Rapidity and Nuclear Geometry ind+ACollisions atsNN=200 GeV

Author: T. L. Thomas, V. S. Pantuev, K. S. Joo, Ryugo S. Hayano, S. Afanasiev, M. K. Dayananda, E. H. Kim, X. Jiang, J. Hamblen, A. Ster, Y. Riabov, M. Wysocki, Kenta Shigaki, N. Apadula, I. Tserruya, Yu. Efremenko, J. Newby, M. Nguyen, Tadaaki Isobe, K. Okada, B. Sahlmueller, A. Vossen, Y. Nakamiya, V. Singh, A. S. Nyanin, Dmitry Blau, Jongmin Lee, Y. Fukao, H. En'yo, P. Tarján, M. J. Leitch, Rachid Nouicer, M. Proissl, S. Esumi, O. Dietzsch, D. Sharma, P. L. McGaughey, Charles Maguire, T. Hester, K. A. Drees, C. M. Camacho, E. J. Desmond, R. Ichimiya, K. Das, E. P. Hartouni, E. T. Atomssa, H. Valle, H. A. Gustafsson, D. Hornback, G. Baksay, D. Lynch, Prashant Shukla, T. Kempel, Dong-Hun Kim, M. Chiu, S. F. Pate, M. Togawa, E. Vazquez-Zambrano, A. Glenn, Ke. Nakamura, S. N. White, Dipanwita Dutta, C. Zhang, G. S. Kyle, Deepa Thomas, P. Ružička, R. Pak, Kiyoshi Tanida, Marisilvia Donadelli, V. Bumazhnov, J. Park, Andry Malala Rakotozafindrabe, D. S. Jumper, A. Yu. Semenov, V. L. Rykov, T. Dahms, H. Al-Bataineh, B. Azmoun, A. Král, M. J. Kweon, A. Taranenko, James Alexander, Eunja Kim, Julia Velkovska, E. Kistenev, C. L. Woody, A. Berdnikov, J. Gosset, N. Kamihara, M. Gonin, Zvi Hirsh Citron, K. Nakano, Viktor Riabov, K. Watanabe, Y. Tsuchimoto, R. Tanabe, Y. Iwanaga, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, I. Ravinovich, K. Shoji, I. E. Yushmanov, Kazushi Miki, T. Horaguchi, W. E. Sondheim, D. Ivanischev, Minghui Liu, P. Lichtenwalner, M. Rosati, A. Caringi, Y. J. Kim, Jen-Chieh Peng, Kazuyoshi Kurita, V-N. Tram, N. Grau, Senta Greene, Taku Gunji, H. Gong, C. Oakley, A. Drees, J. Seele, M. Oka, D. Layton, P. A. Rukoyatkin, L. Aphecetche, V. Papavassiliou, Hongfang Liu, D. E. Fields, K. O. Eyser, A. K. Purwar, A. T. Basye, M. Heffner, Kenneth Francis Read, A. Sukhanov, H. Pereira, K. V. Dharmawardane, B. V. Jacak, M. Bai, Philippe Rosnet, P. W. Stankus, Brajesh K. Singh, T. Murakami, K. Fujiwara, T. Ichihara, Alexandre Lebedev, Y. Morino, Inkyu Park, B. Fadem, E. O'Brien, Takahiro Fusayasu, W. C. Chang, Xiong Wang, A. A. Vinogradov, Atsushi Taketani, Y. L. Yamaguchi, R. A. Soltz, H. Borel, J. T. Mitchell, Motoi Inaba, R. M. Wright, Alexei Khanzadeev, I. V. Sourikova, M. McCumber, F. Kajihara, S. Yokkaichi, P. Liebing, Tae-Yeon Lee, Martin Purschke, Z. Conesa del Valle, Jiangyong Jia, Y. Goto, Y. Tanaka, Alexander Malakhov, Dong Jo Kim, E. Stenlund, G. Grim, M. Grosse Perdekamp, D. M. Lee, D. Silvermyr, A. Dion, C. A. Ogilvie, H. Iinuma, Rushan Han, K. Karatsu, M. Kasai, A. P.T. Palounek, M. E. Connors, R. Seidl, Vladislav Manko, M. Slunečka, Zhiying You, K. B. Lee, A. V. Kazantsev, S. Sawada, R. Bennett, J. B. Choi, J. Ying, A. Franz, Johannes Peter Wessels, L. S. Zolin, M. Kawashima, Kisung Lee, Mate Csanad, A. Veicht, W. J. Park, Anne Marie Sickles, Y. Ikeda, T. K. Hemmick, J. G. Boissevain, E. J. Mannel, Christopher Rosen, K. Kiriluk, J. M. Durham, Yasuo Miake, P. D. Barnes, A. Yanovich, Aaron Angerami, J. Hanks, M. Ouchida, S. Belikov, M. Finger, S. Dairaku, W. A. Zajc, L. Tomášek, Sung Keun Park, Vladimir Samsonov, J. H. Bhom, S. Butsyk, N. Means, J. Asai, S. Tarafdar, A. Morreale, Z. Fraenkel, H. J. Moon, L. Baksay, T. Jones, N. N. Ajitanand, L. Kochenda, M. Issah, O. Zaudtke, M. Nihashi, B. Meredith, B. Komkov, V. Baublis, H. W. Van Hecke, A. Denisov, Peter Christiansen, V. Cianciolo, Alexander Milov, I. Nakagawa, T. Engelmore, Y. Tomita, T. V. Moukhanova, Sergey Fokin, D. Roach, K. M. Kijima, C. Vale, H. Qu, Shingo Sakai, M. I. Nagy, T. C. Awes, Kyoichiro Ozawa, T. Liška, H. Pei, R. Vértesi, R. K. Choudhury, David D'Enterria, C. Pinkenburg, D. Winter, Eva Haslum, D. Yu Peressounko, K. Sakashita, Norio Saito, John Hill, B. Lenzi, M. Virius, S. Zhou, Takahiro Nakamura, D. Watanabe, G. R. Young, B. S. Chang, Christine Angela Aidala, J. Klay, J. S. Bok, Jun Kikuchi, D. McGlinchey, Hideki Hamagaki, K. Aoki, A. Baldisseri, O. Drapier, Frank Ellinghaus, Tamas Ferenc Csorgo, G. David, J. L. Nagle, Toru Sugitate, M. D. Malik, Xingguo Li, M. Stepanov, G. Roche, E. R. Kinney, Y. J. Mao, R. P. Pisani, Jason Kamin, A. Kiss, Tsutomu Mibe, M. A. L. Leite, C. H. Chen, Y. Onuki, E. Vznuzdaev, Susumu Oda, Henner Buesching, Steve Edwards, S. P. Stoll, S. D. Rolnick, F. Matathias, A. Durum, J. E. Frantz, S. P. Sorensen, J. H. Kang, J. S. Haggerty, Jan Rak, O. Chvala, S. S.E. Rosendahl, R. Lacey, Kensuke Homma, E. Richardson, François Fleuret, G. Bunce, D. P. Morrison, R. Granier de Cassagnac, S. Campbell, J. L. Charvet, P. Constantin, Catherine Micaela Silvestre, Seong H. Kim, A. Hadj Henni, A. Adare, Marcus Hohlmann, K. Yamaura, J. G. Lajoie, A. Churyn, S. Chernichenko, V. E. Semenov, K. I. Hahn, B. Bassalleck, L. A. Linden Levy, P. Mikeš, D. Jouan, Beomkyu Kim, K. Boyle, Wei Xie, I. J. Choi, A. Kravitz, R. Belmont, M. Kurosawa, J. S. Kapustinsky, M. Konno, V. Babintsev, Y. S. Lai, S. Bathe, A. Enokizono, K. S. Sim, V. Dzhordzhadze, Agneta Oskarsson, Y. Kwon, Y. Berdnikov, Y. Akiba, R. Yang, M. Mishra, S. Nagamiya, P. Chung, S. Taneja, J. Imrek, Vaclav Vrba, Klaus Johannes Reygers, Tatsuya Chujo, Rui Wei, K. Imai, A. Datta, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, D. Isenhower, A. Toia, L. Mašek, T. Niita, R. S. Towell, I. Garishvili, F. Wei, C. Y. Chi, J. Jin, E. M. Takagui, C. Baumann, S. Kametani, C. P. Singh, B. M. Johnson, R. J. Petti, A. Isupov, C. Suire, J. Sziklai, Brian Cole, K. N. Barish, S. Nam, S. Sano, M. L. Brooks, B. Love, A. G. Litvinenko, A. Kozlov, R. Seto, K. Haruna, I. Danchev, X. He, Y. Aramaki, V. Peresedov, J. Koster, S. Batsouli, H. Masui, A. K. Dubey, A. A. Bickley, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, M. Naglis, Masayasu Ishihara, F. Staley, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, Maya Hachiya Shimomura, Y. I. Makdisi, M. J. Tannenbaum, H. Torii, A. Kim, D. Mukhopadhyay, S. Rembeczki, Alice Mignerey, L. D'Orazio, Takao Sakaguchi, C. Klein-Boesing, A. D. Frawley, S. Huang, and W. Holzmann
Subjects: Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Hadron, General Physics and Astronomy, Elementary particle, Quarkonium, Nuclear matter, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, 0103 physical sciences, Bound state, Rapidity, Nuclear Experiment, 010306 general physics
Abstract: We present measurements of J/psi yields in d + Au collisions at root S-NN = 200 GeV recorded by the PHENIX experiment and compare them with yields in p + p collisions at the same energy per nucleon-nucleon collision. The measurements cover a large kinematic range in J/psi rapidity (-2.2 < y < 2.4) with high statistical precision and are compared with two theoretical models: one with nuclear shadowing combined with final state breakup and one with coherent gluon saturation effects. In order to remove model dependent systematic uncertainties we also compare the data to a simple geometric model. The forward rapidity data are inconsistent with nuclear modifications that are linear or exponential in the density weighted longitudinal thickness, such as those from the final state breakup of the bound state.
Published: 2011

95. Observation of direct-photon collective flow in Au + Au collisions at √s(NN)] = 200 GeV

Author: A, Adare, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, K, Aoki, Y, Aramaki, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, G, Baksay, L, Baksay, K N, Barish, B, Bassalleck, A T, Basye, S, Bathe, V, Baublis, C, Baumann, A, Bazilevsky, S, Belikov, R, Belmont, R, Bennett, A, Berdnikov, Y, Berdnikov, A A, Bickley, J S, Bok, K, Boyle, M L, Brooks, H, Buesching, V, Bumazhnov, G, Bunce, S, Butsyk, C M, Camacho, S, Campbell, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, R K, Choudhury, P, Christiansen, T, Chujo, P, Chung, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, M, Connors, P, Constantin, M, Csanád, T, Csörgő, T, Dahms, S, Dairaku, I, Danchev, K, Das, A, Datta, G, David, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, A, Dion, M, Donadelli, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, D, Dutta, S, Edwards, Y V, Efremenko, F, Ellinghaus, T, Engelmore, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, T, Fusayasu, I, Garishvili, A, Glenn, H, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hamblen, R, Han, J, Hanks, E P, Hartouni, E, Haslum, R, Hayano, X, He, M, Heffner, T K, Hemmick, T, Hester, J C, Hill, M, Hohlmann, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, D, Hornback, S, Huang, T, Ichihara, R, Ichimiya, J, Ide, Y, Ikeda, K, Imai, M, Inaba, D, Isenhower, M, Ishihara, T, Isobe, M, Issah, A, Isupov, D, Ivanischev, B V, Jacak, J, Jia, J, Jin, B M, Johnson, K S, Joo, D, Jouan, D S, Jumper, F, Kajihara, S, Kametani, N, Kamihara, J, Kamin, J H, Kang, J, Kapustinsky, K, Karatsu, D, Kawall, M, Kawashima, A V, Kazantsev, T, Kempel, A, Khanzadeev, K M, Kijima, B I, Kim, D H, Kim, D J, Kim, E, Kim, E J, Kim, S H, Kim, Y J, Kim, E, Kinney, K, Kiriluk, A, Kiss, E, Kistenev, C, Klein-Boesing, L, Kochenda, B, Komkov, M, Konno, J, Koster, D, Kotchetkov, A, Kozlov, A, Král, A, Kravitz, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, D M, Lee, J, Lee, K, Lee, K B, Lee, K S, Lee, M J, Leitch, M A L, Leite, E, Leitner, B, Lenzi, X, Li, P, Liebing, L A, Linden Levy, T, Liška, A, Litvinenko, H, Liu, M X, Liu, B, Love, R, Luechtenborg, D, Lynch, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, E, Mannel, Y, Mao, H, Masui, F, Matathias, M, McCumber, P L, McGaughey, N, Means, B, Meredith, Y, Miake, A C, Mignerey, P, Mikeš, K, Miki, A, Milov, M, Mishra, J T, Mitchell, A K, Mohanty, Y, Morino, A, Morreale, D P, Morrison, T V, Moukhanova, J, Murata, S, Nagamiya, J L, Nagle, M, Naglis, M I, Nagy, I, Nakagawa, Y, Nakamiya, T, Nakamura, K, Nakano, J, Newby, M, Nguyen, R, Nouicer, A S, Nyanin, E, O'Brien, S X, Oda, C A, Ogilvie, M, Oka, K, Okada, Y, Onuki, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, I H, Park, J, Park, S K, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, C, Pinkenburg, R P, Pisani, M, Proissl, M L, Purschke, A K, Purwar, H, Qu, J, Rak, A, Rakotozafindrabe, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, E, Richardson, D, Roach, G, Roche, S D, Rolnick, M, Rosati, C A, Rosen, S S E, Rosendahl, P, Rosnet, P, Rukoyatkin, P, Ružička, B, Sahlmueller, N, Saito, T, Sakaguchi, K, Sakashita, V, Samsonov, S, Sano, T, Sato, S, Sawada, K, Sedgwick, J, Seele, R, Seidl, A Yu, Semenov, R, Seto, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunečka, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, N A, Sparks, P W, Stankus, E, Stenlund, S P, Stoll, T, Sugitate, A, Sukhanov, J, Sziklai, E M, Takagui, A, Taketani, R, Tanabe, Y, Tanaka, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, P, Tarján, H, Themann, T L, Thomas, M, Togawa, A, Toia, L, Tomášek, H, Torii, R S, Towell, I, Tserruya, Y, Tsuchimoto, C, Vale, H, Valle, H W, van Hecke, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, A A, Vinogradov, M, Virius, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, F, Wei, R, Wei, J, Wessels, S N, White, D, Winter, J P, Wood, C L, Woody, R M, Wright, M, Wysocki, W, Xie, Y L, Yamaguchi, K, Yamaura, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, Z, You, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, and L, Zolin
Abstract: The second Fourier component v(2) of the azimuthal anisotropy with respect to the reaction plane is measured for direct photons at midrapidity and transverse momentum (p(T)) of 1-12 GeV/c in Au + Au collisions at √s(NN)] = 200 GeV. Previous measurements of this quantity for hadrons with p(T)6 GeV/c indicate that the medium behaves like a nearly perfect fluid, while for p(T)6 GeV/c a reduced anisotropy is interpreted in terms of a path-length dependence for parton energy loss. In this measurement with the PHENIX detector at the Relativistic Heavy Ion Collider we find that for p(T)4 GeV/c the anisotropy for direct photons is consistent with zero, which is as expected if the dominant source of direct photons is initial hard scattering. However, in the p(T)4 GeV/c region dominated by thermal photons, we find a substantial direct-photon v(2) comparable to that of hadrons, whereas model calculations for thermal photons in this kinematic region underpredict the observed v(2).
Published: 2011

96. Suppression of away-side jet fragments with respect to the reaction plane in Au + Au collisions atsNN=200GeV

Author: K. Karatsu, P. Tarján, Anne Marie Sickles, Y. Fukao, T. Kempel, Dong-Hun Kim, G. R. Young, S. Sawada, Senta Greene, J. Ying, A. Franz, T. Hester, A. T. Basye, B. Azmoun, A. Král, M. J. Kweon, B. Fadem, E. O'Brien, N. A. Sparks, R. S. Towell, S. P. Sorensen, Jen-Chieh Peng, I. Garishvili, V-N. Tram, N. Grau, F. Wei, O. Chvala, Marisilvia Donadelli, V. Bumazhnov, M. Oka, M. I. Nagy, D. Watanabe, Charles Maguire, A. Dion, Andry Malala Rakotozafindrabe, Seong H. Kim, J. G. Lajoie, S. Dairaku, Atsushi Taketani, A. Enokizono, P. Liebing, Kyeongpil Lee, J. Ide, Motoi Inaba, R. M. Wright, M. D. Malik, E. Vznuzdaev, B. Meredith, R. Tanabe, D. Layton, R. A. Soltz, H. Borel, Kiyoshi Tanida, I. J. Choi, A. Kravitz, Hongfang Liu, Inkyu Park, D. E. Fields, M. Grosse Perdekamp, B. V. Jacak, Xiong Wang, M. Gonin, E. Kistenev, M. E. Connors, Dong Jo Kim, C. Y. Chi, C. M. Camacho, Prashant Shukla, John Hill, S. F. Pate, H. Al-Bataineh, M. McCumber, V. Papavassiliou, E. H. Kim, M. Rosati, X. He, K. S. Joo, Toru Sugitate, K. S. Sim, V. Dzhordzhadze, A. Sukhanov, W. C. Chang, K. A. Drees, M. Wysocki, O. Zaudtke, Y. Kwon, H. Pei, Maya Hachiya Shimomura, A. Veicht, K. Sakashita, H. Pereira, Y. Morino, A. Hadj Henni, J. Hanks, R. Yang, H. Qu, Peter Christiansen, Y. Ikeda, Y. Aramaki, D. Winter, D. Yu Peressounko, Mate Csanad, Y. I. Makdisi, I. Tserruya, Beomkyu Kim, K. Boyle, Yu. Efremenko, Wei Xie, Sung Keun Park, Rushan Han, K. Imai, V. Peresedov, V. Singh, Hideki Hamagaki, K. Aoki, J. G. Boissevain, E. J. Mannel, G. David, S. Esumi, D. Sharma, Minghui Liu, N. N. Ajitanand, R. Ichimiya, François Fleuret, J. Koster, Tae-Yeon Lee, Martin Purschke, M. Virius, Takahiro Nakamura, M. Naglis, Y. Onuki, David D'Enterria, K. Watanabe, L. Aphecetche, M. J. Tannenbaum, M. Heffner, K. B. Lee, Vladimir Samsonov, S. Batsouli, K. Shoji, Jan Rak, Jason Kamin, R. Lacey, T. Ichihara, H. Torii, R. P. Pisani, R. Granier de Cassagnac, A. Adare, Susumu Oda, H. Masui, A. K. Dubey, J. Jin, C. L. Silva, Kenneth Francis Read, A. A. Bickley, P. W. Stankus, E. M. Takagui, A. Durum, A. A. Vinogradov, D. Mukhopadhyay, S. Rembeczki, A. Morreale, Johannes Peter Wessels, S. P. Stoll, Takahiro Fusayasu, Z. Fraenkel, J. L. Charvet, C. Pinkenburg, B. Love, Catherine Micaela Silvestre, C. H. Chen, Eunja Kim, C. Baumann, S. Kametani, K. Yamaura, D. Roach, J. P. Wood, K. M. Kijima, R. K. Choudhury, Y. Tanaka, Jiangyong Jia, Y. Goto, Alexander Malakhov, K. Das, C. P. Singh, Alice Mignerey, B. M. Johnson, A. Glenn, A. G. Litvinenko, E. P. Hartouni, D. Silvermyr, S. S.E. Rosendahl, G. Bunce, Tamas Ferenc Csorgo, Masayasu Ishihara, I. Ravinovich, Alexander Milov, I. Nakagawa, R. Luechtenborg, Xingguo Li, L. Baksay, A. Isupov, C. Suire, M. Kurosawa, Takao Sakaguchi, M. Stepanov, G. Roche, L. S. Zolin, C. Klein-Boesing, Y. J. Mao, J. L. Nagle, W. J. Park, Christopher Rosen, A. Kozlov, J. Sziklai, A. D. Frawley, R. Seto, Tadaaki Isobe, K. Haruna, M. Bai, A. Churyn, T. Engelmore, S. Huang, P. D. Barnes, Brian Cole, A. Yanovich, O. Drapier, Frank Ellinghaus, I. Danchev, W. Holzmann, J. H. Kang, S. Tarafdar, S. N. White, O. Dietzsch, J. S. Haggerty, D. Jouan, Zhiying You, R. Bennett, E. T. Atomssa, H. Valle, M. Kawashima, Dipanwita Dutta, E. R. Kinney, K. N. Barish, Julia Velkovska, M. Finger, D. P. Morrison, S. Campbell, P. Chung, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, Jongmin Lee, P. A. Rukoyatkin, D. Lynch, F. Staley, J. Imrek, D. S. Jumper, V. L. Rykov, T. Dahms, V. E. Semenov, Y. S. Lai, S. Sano, B. Komkov, C. A. Ogilvie, Tatsuya Chujo, D. Kawall, Kisung Lee, T. K. Hemmick, A. Datta, H. Themann, J. M. Durham, M. L. Brooks, Yasuo Miake, Taku Gunji, H. Gong, J. Seele, P. L. McGaughey, Norio Saito, Eva Haslum, B. Lenzi, F. Kajihara, L. Kochenda, M. Issah, J. Murata, M. A. L. Leite, S. Afanasiev, A. Ster, S. Butsyk, M. Chiu, Gerd Joachim Kunde, I. Shein, J. Newby, R. Pak, S. Zhou, A. Baldisseri, S. D. Rolnick, N. Kamihara, K. Sedgwick, D. Hornback, A. Deshpande, Kazuyoshi Kurita, A. V. Kazantsev, A. Drees, Ajit Kumar Mohanty, A. Taranenko, T. A. Shibata, Kazushi Miki, T. Horaguchi, T. Sato, Brajesh K. Singh, Y. Watanabe, I. Younus, L. Tomášek, A. Soldatov, P. Mikeš, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, Jun Kikuchi, D. Isenhower, A. Toia, L. Mašek, H. Iinuma, T. Niita, A. P.T. Palounek, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, Y. Tomita, Sergey Fokin, H. A. Gustafsson, C. Zhang, P. Ružička, Viktor Riabov, C. L. Woody, A. Berdnikov, I. V. Sourikova, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, J. Park, Y. Tsuchimoto, M. Ouchida, N. Means, J. Asai, I. E. Yushmanov, Alexei Khanzadeev, Shingo Sakai, E. Stenlund, T. L. Thomas, Y. Nakamiya, Ryugo S. Hayano, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, Rachid Nouicer, M. Proissl, G. Baksay, T. V. Moukhanova, R. Vértesi, J. E. Frantz, Y. J. Kim, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, S. Chernichenko, K. I. Hahn, K. O. Eyser, A. K. Purwar, K. Fujiwara, B. Bassalleck, M. Konno, Y. L. Yamaguchi, J. T. Mitchell, E. Leitner, R. Seidl, Vladislav Manko, M. Slunečka, A. Yu. Semenov, J. Gosset, S. Belikov, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, S. Yokkaichi, H. W. Van Hecke, R. Belmont, J. S. Kapustinsky, V. Babintsev, G. S. Kyle, James Alexander, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, D. Kotchetkov, Philippe Rosnet, V. S. Pantuev, Alexandre Lebedev, J. Hamblen, D. M. Lee, S. Bathe, K. Okada, B. Sahlmueller, H. En'yo, Agneta Oskarsson, M. J. Leitch, K. Kiriluk, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, A. Kiss, Henner Buesching, Steve Edwards, Marcus Hohlmann, and L. A. Linden Levy
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Jet (fluid), Meson, 010308 nuclear & particles physics, Hadron, Parton, Elementary particle, 01 natural sciences, Nuclear physics, Momentum, Pion, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: Pair correlations between large transverse momentum neutral pion triggers (p(T) = 4-7 GeV/c) and charged hadron partners (p(T) = 3-7 GeV/c) in central (0%-20%) and midcentral (20%-60%) Au + Au collisions at root s(NN) = 200 GeV are presented as a function of trigger orientation with respect to the reaction plane. The particles are at larger momentum than where jet shape modifications have been observed, and the correlations are sensitive to the energy loss of partons traveling through hot densematter. An out-of-plane trigger particle produces only 26 +/- 20% of the away-side pairs that are observed opposite of an in-plane trigger particle for midcentral (20%-60%) collisions. In contrast, near-side jet fragments are consistent with no suppression or dependence on trigger orientation with respect to the reaction plane. These observations are qualitatively consistent with a picture of little near-side parton energy loss either due to surface bias or fluctuations and increased away-side parton energy loss due to a long path through the medium. The away-side suppression as a function of reaction-plane angle is shown to be sensitive to both the energy loss mechanism and the space-time evolution of heavy-ion collisions.
Published: 2011

97. Event structure and double helicity asymmetry in jet production from polarizedp+pcollisions ats=200 GeV

Author: Maya Hachiya Shimomura, J. H. Kang, J. S. Haggerty, A. Romana, R. Pak, N. Kamihara, Y. I. Makdisi, Y. Nakamiya, G. Baksay, R. Armendariz, Kazuyoshi Kurita, A. Drees, J. L. Charvet, J. Kubart, E. H. Kim, Y. S. Lai, M. J. Tannenbaum, T. E. Miller, D. Mukhopadhyay, R. A. Soltz, John Hill, C. A. Ogilvie, Herve Borel, D. Lynch, S. Rembeczki, X. He, O. O. Omiwade, T. K. Hemmick, M. Grosse Perdekamp, S. P. Sorensen, H. A. Torii, Yasuo Miake, Dylan Walker, Toru Sugitate, L. D. Isenhower, J. Gosset, P. Chung, V. Peresedov, L. Kochenda, S. Yokkaichi, M. Rosati, J. G. Boissevain, Masashi Kaneta, V. L. Rykov, T. Dahms, Charles Maguire, S. Butsyk, A. Kiss, Vladimir Samsonov, L. Aphecetche, C. Pinkenburg, W. S. Emam, H. Kanou, M. Stepanov, G. Roche, Taku Gunji, H. Gong, J. Seele, R. Vértesi, A. V. Kazantsev, F. Kajihara, Z. Yasin, Henner Buesching, S. Batsouli, H. Masui, A. K. Dubey, H. Delagrange, J. Chiba, N. N. Ajitanand, A. A. Bickley, K. Dehmelt, C. R. Cleven, C. Haegemann, Y. Inoue, A. A. Vinogradov, S. Afanasiev, François Fleuret, B. Love, Marcus Hohlmann, V. S. Pantuev, S. Zhou, J. G. Lajoie, T. Hachiya, I. J. Choi, A. Kravitz, D. Winter, D. Yu Peressounko, S. F. Pate, A. Ster, J. Egdemir, Jason Kamin, Jiangyong Jia, Y. Goto, Kiyoshi Tanida, E. Kistenev, J. T. Mitchell, A. G. Litvinenko, R. Seidl, Vladislav Manko, P. MikeÅ, Takao Sakaguchi, Dong-Hun Kim, M. Slunečka, Y. L. Yamaguchi, B. Komkov, Johannes Peter Wessels, S. N. White, Tamas Ferenc Csorgo, A. Hadj Henni, J. L. Nagle, M. Gonin, Jen-Chieh Peng, Jan Rak, R. Lacey, P. Tarján, H. Al-Bataineh, Takahiro Nakamura, S. P. Stoll, J. Newby, O. Zaudtke, S. Belikov, C. Klein-Boesing, Junji Tojo, Mate Csanad, K. Boyle, M. Ouchida, Norio Saito, C. Silvestre, M. A. L. Leite, H. Harada, H. Pereira, K. Nakano, J. Asai, A. Kozlov, M. Virius, R. Seto, N. Grau, Wei Xie, R. Granier de Cassagnac, A. Adare, D. Hornback, Xiong Wang, C. Vale, B. S. Chang, J. E. Frantz, K. Haruna, A. Taranenko, S. S.E. Rosendahl, Susumu Oda, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, T. A. Shibata, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, Kazushi Miki, W. E. Sondheim, K. Okada, Senta Greene, Dong Jo Kim, M. B. Deaton, Y. Tanaka, Hiroaki Ohnishi, V. Papavassiliou, Sébastien Gadrat, Christine Angela Aidala, J. Klay, B. Sahlmueller, H. En'yo, D. Isenhower, A. Toia, P. A. Rukoyatkin, T. Ichihara, Osamu Jinnouchi, A. D. Frawley, T. Tabaru, S. H. Aronson, Shingo Sakai, T. L. Thomas, Alexei Khanzadeev, E. Stenlund, H. Sakata, S. Takagi, B. E. Norman, K. N. Barish, E. O'Brien, Matthew G. Reuter, Takahiro Fusayasu, F. Matathias, K. Das, E. P. Hartouni, M. J. Leitch, A. Durum, K. Shoji, Ryugo S. Hayano, K. O. Eyser, A. K. Purwar, K. Fujiwara, Kensuke Homma, P. W. Stankus, Sergey Fokin, T. C. Awes, Y. Riabov, Kyoichiro Ozawa, Kenta Shigaki, F. Staley, L. Baksay, Rushan Han, V. Babintsev, T. Horaguchi, Jun Kikuchi, Eva Haslum, B. Lenzi, Alexander Malakhov, D. Silvermyr, Alexander Milov, A. Glenn, I. Ravinovich, M. Nguyen, I. Nakagawa, P. Constantin, Steven E. Skutnik, W. Holzmann, H. Pei, M. Mitrovski, L. S. Zolin, W. J. Park, David D'Enterria, A. S. Nyanin, S. Chernichenko, Rachid Nouicer, M. Issah, Y. Nagata, O. Drapier, Frank Ellinghaus, G. S. Kyle, O. Dietzsch, K. S. Sim, V. Dzhordzhadze, E. R. Kinney, E. T. Atomssa, M. K. Lee, Y. Kwon, Xingguo Li, D. P. Morrison, S. Campbell, B. Bassalleck, C. L. Woody, M. Wysocki, H. W. Van Hecke, H. Valle, M. D. Malik, L. TomáÅek, P. D. Barnes, E. Vznuzdaev, A. Yanovich, H. Qu, D. E. Fields, James Alexander, B. V. Jacak, V. E. Semenov, M. Konno, J. Zimányi, H. Hiejima, Tatsuya Chujo, I. Tserruya, R. Averbeck, Robert F. Hobbs, Byung-Sik Hong, T. V. Moukhanova, Yu. Efremenko, S. Bathe, H. Iinuma, V. Singh, Agneta Oskarsson, A. Bazilevsky, Minghui Liu, Hideki Hamagaki, K. Aoki, Julia Velkovska, Y. Berdnikov, G. David, A. P.T. Palounek, M. McCumber, M. N. Wagner, Philippe Rosnet, Y. Akiba, M. Mishra, S. Nagamiya, I. V. Sourikova, E. J. Desmond, Y. Fukao, A. Shevel, Debashish Pal, M. L. Brooks, K. Imai, S. Sawada, Vaclav Vrba, Klaus Johannes Reygers, T. Hester, J. Ying, A. Franz, Alexandre Lebedev, H. A. Gustafsson, M. Togawa, C. Zhang, D. M. Lee, J. Park, V-N. Tram, M. Heffner, Anne Marie Sickles, Kenneth Francis Read, Motoi Inaba, Viktor Riabov, Y. Tsuchimoto, I. E. Yushmanov, G. R. Young, Tadaaki Isobe, R. Bennett, P. L. McGaughey, M. Chiu, M. Finger, B. Azmoun, A. Král, M. J. Kweon, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, K. S. Joo, T. LiÅka, S. Esumi, D. Sharma, Tae-Yeon Lee, Martin Purschke, D. Kotchetkov, A. Morreale, Z. Fraenkel, G. Bunce, A. Churyn, D. Jouan, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, M. Naglis, C. L. Silva, Masayasu Ishihara, Susumu Sato, D. Kawall, V. I. Kochetkov, J. Murata, Gerd Joachim Kunde, I. Shein, Alberto Baldisseri, C. P. Singh, B. M. Johnson, A. Isupov, C. Suire, J. Sziklai, Brian Cole, L. MaÅek, Saskia Mioduszewski, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, Akio Kiyomichi, N. Kurihara, C. Y. Chi, Y. J. Mao, and S. Kametani
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Photon, 010308 nuclear & particles physics, media_common.quotation_subject, Lambda, 01 natural sciences, 7. Clean energy, Helicity, Asymmetry, Charged particle, Gluon, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Event generator, media_common
Abstract: We report on the event structure and double helicity asymmetry (A(LL)) of jet production in longitudinally polarized p + p collisions at root s = 200 GeV. Photons and charged particles were measured by the PHENIX experiment at midrapidity vertical bar eta vertical bar 2 GeV/c) photon in the event. Event structure, such as multiplicity, p(T) density and thrust in the PHENIX acceptance, were measured and compared with the results from the PYTHIA event generator and the GEANT detector simulation. The shape of jets and the underlying event were well reproduced at this collision energy. For the measurement of jet A(LL), photons and charged particles were clustered with a seed-cone algorithm to obtain the cluster pT sum (p(T)(reco)). The effect of detector response and the underlying events on p(T)(reco) was evaluated with the simulation. The production rate of reconstructed jets is satisfactorily reproduced with the next-to-leading-order and perturbative quantum chromodynamics jet production cross section. For 4 = 49% we measured Lambda(LL) = -0.0014 +/- 0.0037(stat) at the lowest p(T)(reco) bin (4-5 GeV= c) and -0.0181 +/- 0.0282(stat) at the highest p(T)(reco) bin (10-12 GeV= c) with a beam polarization scale error of 9.4% and a pT scale error of 10%. Jets in the measured p(T)(reco) range arise primarily from hard-scattered gluons with momentum fraction 0: 02 < x < 0: 3 according to PYTHIA. The measured A(LL) is compared with predictions that assume various Delta G(x) distributions based on the Gluck-Reya-Stratmann-Vogelsang parameterization. The present result imposes the limit -a.1 < integral(0.3)(0.02) dx Delta G(x, mu(2) = GeV2) < 0.4 at 95% confidence level or integral(0.3)(0.002) dx Delta G(x, mu(2) = 1 GeV2) < 0.5 at 99% confidence level.
Published: 2011

98. Identified charged hadron production inp+pcollisions ats=200and 62.4 GeV

Author: S. Bathe, K. S. Sim, V. Dzhordzhadze, Y. L. Yamaguchi, B. Komkov, Agneta Oskarsson, L. Aphecetche, Y. Kwon, Mate Csanad, Y. Berdnikov, Y. Akiba, Norio Saito, Hiroaki Ohnishi, K. B. Lee, R. Yang, M. A. L. Leite, H. Hiejima, M. Rosati, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Alexander Milov, I. Nakagawa, T. Engelmore, K. Imai, M. Ouchida, J. S. Kapustinsky, S. N. White, V. Babintsev, N. Means, Johannes Peter Wessels, J. Asai, V. S. Pantuev, Y. Ikeda, C. M. Camacho, Tae-Yeon Lee, A. A. Vinogradov, D. Roach, K. M. Kijima, Martin Purschke, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, David D'Enterria, C. Baumann, H. Pei, J. G. Boissevain, E. J. Mannel, S. Afanasiev, A. Ster, Prashant Shukla, S. F. Pate, Masashi Kaneta, Zvi Hirsh Citron, R. A. Soltz, Shingo Sakai, H. Liu, Anne Marie Sickles, K. O. Eyser, A. K. Purwar, K. Fujiwara, Jiangyong Jia, Y. Goto, C. P. Singh, H. Iinuma, A. P.T. Palounek, D. Kotchetkov, K. Nakano, B. M. Johnson, V. E. Semenov, J. Zimányi, J. Newby, K. A. Drees, Maya Hachiya Shimomura, Xingguo Li, M. Naglis, C. L. Silva, H. Al-Bataineh, A. Morreale, W. A. Zajc, K. Shoji, M. I. Nagy, M. Issah, V. Baublis, A. Denisov, Y. Tomita, T. L. Thomas, Junji Tojo, I. Ravinovich, E. H. Kim, Tatsuya Chujo, W. E. Sondheim, D. Ivanischev, Sergey Fokin, M. Gonin, A. Isupov, C. Suire, Z. Fraenkel, I. Tserruya, R. Pak, Yu. Efremenko, C. Pinkenburg, Y. I. Makdisi, N. Kamihara, P. A. Rukoyatkin, P. W. Stankus, Masayasu Ishihara, M. D. Malik, E. Vznuzdaev, M. Grosse Perdekamp, D. E. Fields, H. A. Gustafsson, J. Sziklai, C. Zhang, M. N. Wagner, R. Vértesi, R. K. Choudhury, Y. Nagata, V. Singh, M. Bai, B. V. Jacak, Ryugo S. Hayano, G. R. Young, K. S. Joo, Brian Cole, D. Hornback, Y. Riabov, A. Sukhanov, H. Pereira, M. Stepanov, Susumu Sato, G. Roche, Y. J. Mao, S. Butsyk, S. Kametani, T. Horaguchi, B. Meredith, Y. Morino, P. Ružička, K. Okada, H. Hamagaki, R. S. Towell, A. Hadj Henni, Minghui Liu, Vladimir Samsonov, Viktor Riabov, R. Armendariz, Kenta Shigaki, Y. Fukao, A. Shevel, M. Nguyen, M. McCumber, I. Garishvili, Akio Kiyomichi, F. Wei, Y. Onuki, T. Hester, A. Taranenko, D. Kawall, H. Themann, H. W. Van Hecke, M. J. Tannenbaum, John Hill, J. H. Kang, J. S. Haggerty, V. I. Kochetkov, Beomkyu Kim, K. Boyle, Jan Rak, Ajit Kumar Mohanty, Wei Xie, T. A. Shibata, R. Hobbs, N. Kurihara, B. Sahlmueller, Kazushi Miki, M. Heffner, A. S. Nyanin, Kenneth Francis Read, H. En'yo, M. J. Leitch, Rachid Nouicer, G. S. Kyle, James Alexander, R. Lacey, Toru Sugitate, L. D. Isenhower, Kazuyoshi Kurita, A. Drees, A. Romana, J. Murata, H. Torii, Gerd Joachim Kunde, S. Esumi, D. Sharma, R. Granier de Cassagnac, A. Adare, O. Dietzsch, Steven E. Skutnik, R. Bennett, Brajesh K. Singh, C. Y. Chi, E. T. Atomssa, M. B. Deaton, T. Sato, J. E. Frantz, M. Finger, S. Dairaku, A. V. Kazantsev, K. Das, R. Averbeck, Byung-Sik Hong, H. Valle, C. L. Woody, A. Berdnikov, A. Bazilevsky, Philippe Rosnet, R. Ichimiya, Tamas Ferenc Csorgo, K. Dehmelt, D. Mukhopadhyay, I. Shein, S. Rembeczki, Y. Tanaka, J. Kubart, Dipanwita Dutta, K. Sakashita, O. Zaudtke, V. Cianciolo, H. Qu, S. P. Sorensen, Alexandre Lebedev, Jen-Chieh Peng, Alexei Khanzadeev, Dylan Walker, M. Virius, E. P. Hartouni, V-N. Tram, N. Grau, D. M. Lee, L. Tomášek, François Fleuret, A. Kiss, J. L. Nagle, P. Mikeš, B. Azmoun, K. Sedgwick, Alberto Baldisseri, A. Král, F. Matathias, A. Deshpande, M. J. Kweon, E. Stenlund, H. Sakata, Y. S. Lai, Julia Velkovska, N. N. Ajitanand, Takahiro Nakamura, K. Aoki, K. Kiriluk, G. David, J. Egdemir, Z. Yasin, D. Winter, Motoi Inaba, I. V. Sourikova, Xiong Wang, Saskia Mioduszewski, J. Chiba, Y. Watanabe, Seong H. Kim, T. Ichihara, M. Oka, A. Yu. Semenov, Dong Jo Kim, J. G. Lajoie, T. Hachiya, D. Yu Peressounko, Susumu Oda, Jason Kamin, Osamu Jinnouchi, Henner Buesching, S. P. Stoll, A. Glenn, S. Gadrat, C. Silvestre, Kensuke Homma, T. C. Awes, A. Dion, Kyoichiro Ozawa, T. Liška, I. Younus, Takao Sakaguchi, Matthew G. Reuter, Takahiro Fusayasu, J. Gosset, A. Durum, A. Veicht, C. Klein-Boesing, F. Staley, L. Baksay, Eva Haslum, B. Lenzi, P. Tarján, T. V. Moukhanova, C. R. Cleven, C. Haegemann, Y. Inoue, S. S.E. Rosendahl, G. Bunce, Alexander Malakhov, Herve Borel, D. Lynch, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Charles Maguire, Jun Kikuchi, Tadaaki Isobe, I. J. Choi, A. Soldatov, Atsushi Taketani, A. Enokizono, P. Liebing, A. Kravitz, J. Jin, E. M. Takagui, A. D. Frawley, T. Tabaru, Marcus Hohlmann, Andry Malala Rakotozafindrabe, D. Silvermyr, K. Yamaura, D. Isenhower, A. Toia, A. Churyn, E. J. Desmond, V. L. Rykov, T. Dahms, R. Tanabe, D. Layton, S. Huang, S. H. Aronson, P. L. McGaughey, M. Togawa, L. S. Zolin, W. J. Park, J. Park, S. Yokkaichi, T. Kempel, Dong-Hun Kim, Kiyoshi Tanida, E. Kistenev, P. D. Barnes, A. Yanovich, L. Mašek, D. Jouan, W. Holzmann, M. K. Lee, P. Constantin, S. Chernichenko, Y. Tsuchimoto, W. C. Chang, M. Chiu, H. Harada, I. E. Yushmanov, Rushan Han, C. A. Ogilvie, Senta Greene, T. K. Hemmick, B. Bassalleck, Yasuo Miake, A. T. Basye, B. E. Norman, T. Niita, B. Fadem, E. O'Brien, M. Konno, L. Kochenda, H. Kanou, Taku Gunji, H. Gong, J. T. Mitchell, J. Seele, F. Kajihara, R. Seidl, Vladislav Manko, M. Slunečka, H. Delagrange, S. Belikov, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, Y. Nakamiya, S. Zhou, G. Baksay, S. D. Rolnick, J. L. Charvet, T. E. Miller, M. Kurosawa, P. Chung, J. Imrek, W. S. Emam, V. Papavassiliou, Debashish Pal, S. Sawada, J. Ying, A. Franz, M. Mitrovski, M. Wysocki, S. Takagi, K. N. Barish, M. L. Brooks, B. Love, A. G. Litvinenko, A. Kozlov, R. Seto, K. Haruna, X. He, O. O. Omiwade, V. Peresedov, J. Koster, S. Batsouli, H. Masui, A. K. Dubey, and A. A. Bickley
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Hadron, 7. Clean energy, 01 natural sciences, Nuclear physics, Baryon, Pion, Antimatter, 0103 physical sciences, Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Nucleon
Abstract: Transverse momentum distributions and yields for pi(+/-), K-+/-, p, and (p) over bar in p + p collisions at root s = 200 and 62.4 GeV at midrapidity are measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). These data provide important baseline spectra for comparisons with identified particle spectra in heavy ion collisions at RHIC. We present the inverse slope parameter T-inv, mean transverse momentum , and yield per unit rapidity dN/dy at each energy, and compare them to other measurements at different root s in p + p and p + (p) over bar collisions. We also present the scaling properties such as m(T) scaling and x(T) scaling on the p(T) spectra between different energies. To discuss the mechanism of the particle production in p + p collisions, the measured spectra are compared to next-to-leading-order or next-to-leading-logarithmic perturbative quantum chromodynamics calculations.
Published: 2011

99. Experimental studies of di-jet survival and surface emission bias inAu+Aucollisions via angular correlations with respect to back-to-back leading hadrons

Author: H. Agakishiev, M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, C. D. Anson, D. Arkhipkin, G. S. Averichev, J. Balewski, D. R. Beavis, N. K. Behera, R. Bellwied, M. J. Betancourt, R. R. Betts, A. Bhasin, A. K. Bhati, H. Bichsel, J. Bielcik, J. Bielcikova, B. Biritz, L. C. Bland, I. G. Bordyuzhin, W. Borowski, J. Bouchet, E. Braidot, A. V. Brandin, A. Bridgeman, S. G. Brovko, E. Bruna, S. Bueltmann, I. Bunzarov, T. P. Burton, X. Z. Cai, H. Caines, M. Calderón de la Barca Sánchez, D. Cebra, R. Cendejas, M. C. Cervantes, Z. Chajecki, P. Chaloupka, S. Chattopadhyay, H. F. Chen, J. H. Chen, J. Y. Chen, L. Chen, J. Cheng, M. Cherney, A. Chikanian, K. E. Choi, W. Christie, P. Chung, M. J. M. Codrington, R. Corliss, J. G. Cramer, H. J. Crawford, S. Dash, A. Davila Leyva, L. C. De Silva, R. R. Debbe, T. G. Dedovich, A. A. Derevschikov, R. Derradi de Souza, L. Didenko, P. Djawotho, S. M. Dogra, X. Dong, J. L. Drachenberg, J. E. Draper, J. C. Dunlop, L. G. Efimov, M. Elnimr, J. Engelage, G. Eppley, M. Estienne, L. Eun, O. Evdokimov, R. Fatemi, J. Fedorisin, R. G. Fersch, P. Filip, E. Finch, V. Fine, Y. Fisyak, C. A. Gagliardi, D. R. Gangadharan, A. Geromitsos, F. Geurts, P. Ghosh, Y. N. Gorbunov, A. Gordon, O. G. Grebenyuk, D. Grosnick, S. M. Guertin, A. Gupta, W. Guryn, B. Haag, O. Hajkova, A. Hamed, L-X. Han, J. W. Harris, J. P. Hays-Wehle, M. Heinz, S. Heppelmann, A. Hirsch, E. Hjort, G. W. Hoffmann, D. J. Hofman, B. Huang, H. Z. Huang, T. J. Humanic, L. Huo, G. Igo, P. Jacobs, W. W. Jacobs, C. Jena, F. Jin, J. Joseph, E. G. Judd, S. Kabana, K. Kang, J. Kapitan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, D. Kettler, D. P. Kikola, J. Kiryluk, A. Kisiel, V. Kizka, S. R. Klein, A. G. Knospe, D. D. Koetke, T. Kollegger, J. Konzer, I. Koralt, L. Koroleva, W. Korsch, L. Kotchenda, V. Kouchpil, P. Kravtsov, K. Krueger, M. Krus, L. Kumar, P. Kurnadi, M. A. C. Lamont, J. M. Landgraf, S. LaPointe, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, W. Leight, M. J. LeVine, C. Li, L. Li, N. Li, W. Li, X. Li, Y. Li, Z. M. Li, M. A. Lisa, F. Liu, H. Liu, J. Liu, T. Ljubicic, W. J. Llope, R. S. Longacre, W. A. Love, Y. Lu, E. V. Lukashov, X. Luo, G. L. Ma, Y. G. Ma, D. P. Mahapatra, R. Majka, O. I. Mall, L. K. Mangotra, R. Manweiler, S. Margetis, C. Markert, H. Masui, H. S. Matis, Yu. A. Matulenko, D. McDonald, T. S. McShane, A. Meschanin, R. Milner, N. G. Minaev, S. Mioduszewski, A. Mischke, M. K. Mitrovski, Y. Mohammed, B. Mohanty, M. M. Mondal, B. Morozov, D. A. Morozov, M. G. Munhoz, M. K. Mustafa, M. Naglis, B. K. Nandi, T. K. Nayak, P. K. Netrakanti, L. V. Nogach, S. B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, A. Ohlson, V. Okorokov, E. W. Oldag, D. Olson, M. Pachr, B. S. Page, S. K. Pal, Y. Pandit, Y. Panebratsev, T. Pawlak, H. Pei, T. Peitzmann, C. Perkins, W. Peryt, S. C. Phatak, P. Pile, M. Planinic, M. A. Ploskon, J. Pluta, D. Plyku, N. Poljak, A. M. Poskanzer, B. V. K. S. Potukuchi, C. B. Powell, D. Prindle, C. Pruneau, N. K. Pruthi, P. R. Pujahari, J. Putschke, H. Qiu, R. Raniwala, S. Raniwala, R. L. Ray, R. Redwine, R. Reed, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, A. Rose, L. Ruan, J. Rusnak, N. R. Sahoo, S. Sakai, I. Sakrejda, S. Salur, J. Sandweiss, E. Sangaline, A. Sarkar, J. Schambach, R. P. Scharenberg, A. M. Schmah, N. Schmitz, T. R. Schuster, J. Seele, J. Seger, I. Selyuzhenkov, P. Seyboth, E. Shahaliev, M. Shao, M. Sharma, S. S. Shi, Q. Y. Shou, E. P. Sichtermann, F. Simon, R. N. Singaraju, M. J. Skoby, N. Smirnov, P. Sorensen, H. M. Spinka, B. Srivastava, T. D. S. Stanislaus, D. Staszak, S. G. Steadman, J. R. Stevens, R. Stock, M. Strikhanov, B. Stringfellow, A. A. P. Suaide, M. C. Suarez, N. L. Subba, M. Sumbera, X. M. Sun, Y. Sun, Z. Sun, B. Surrow, D. N. Svirida, T. J. M. Symons, A. Szanto de Toledo, J. Takahashi, A. H. Tang, Z. Tang, L. H. Tarini, T. Tarnowsky, D. Thein, J. H. Thomas, J. Tian, A. R. Timmins, D. Tlusty, M. Tokarev, T. A. Trainor, V. N. Tram, S. Trentalange, R. E. Tribble, P. Tribedy, O. D. Tsai, T. Ullrich, D. G. Underwood, G. Van Buren, G. van Nieuwenhuizen, J. A. Vanfossen, R. Varma, G. M. S. Vasconcelos, A. N. Vasiliev, F. Videbæk, Y. P. Viyogi, S. Vokal, S. A. Voloshin, M. Wada, M. Walker, F. Wang, G. Wang, H. Wang, J. S. Wang, Q. Wang, X. L. Wang, Y. Wang, G. Webb, J. C. Webb, G. D. Westfall, C. Whitten, H. Wieman, S. W. Wissink, R. Witt, W. Witzke, Y. F. Wu, Z. Xiao, W. Xie, H. Xu, N. Xu, Q. H. Xu, W. Xu, Y. Xu, Z. Xu, L. Xue, Y. Yang, P. Yepes, K. Yip, I-K. Yoo, M. Zawisza, H. Zbroszczyk, W. Zhan, J. B. Zhang, S. Zhang, W. M. Zhang, X. P. Zhang, Y. Zhang, Z. P. Zhang, J. Zhao, C. Zhong, W. Zhou, X. Zhu, Y. H. Zhu, R. Zoulkarneev, and Y. Zoulkarneeva
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Hadron, Particle accelerator, Elementary particle, Jet (particle physics), 01 natural sciences, Spectral line, law.invention, Nuclear physics, Deuterium, law, Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: We report first results from an analysis based on a new multi-hadron correlation technique, exploring jet-medium interactions and di-jet surface emission bias at the BNL Relativistic Heavy Ion Collider (RHIC). Pairs of back-to-back high-transverse-momentum hadrons are used for triggers to study associated hadron distributions. In contrast with two-and three-particle correlations with a single trigger with similar kinematic selections, the associated hadron distribution of both trigger sides reveals no modification in either relative pseudorapidity Delta eta or relative azimuthal angle Delta phi from d + Au to central Au + Au collisions. We determine associated hadron yields and spectra as well as production rates for such correlated back-to-back triggers to gain additional insights on medium properties.
Published: 2011

100. Suppression of back-to-back hadron pairs at forward rapidity in d+Au collisions at √s(NN)=200 GeV

Author: A, Adare, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, A, Angerami, K, Aoki, N, Apadula, Y, Aramaki, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, G, Baksay, L, Baksay, K N, Barish, B, Bassalleck, A T, Basye, S, Bathe, V, Baublis, C, Baumann, A, Bazilevsky, S, Belikov, R, Belmont, R, Bennett, A, Berdnikov, Y, Berdnikov, J H, Bhom, D S, Blau, J S, Bok, K, Boyle, M L, Brooks, H, Buesching, V, Bumazhnov, G, Bunce, S, Butsyk, S, Campbell, A, Caringi, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, J B, Choi, R K, Choudhury, P, Christiansen, T, Chujo, P, Chung, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, Z, Conesa del Valle, M, Connors, M, Csanád, T, Csörgo, T, Dahms, S, Dairaku, I, Danchev, K, Das, A, Datta, G, David, M K, Dayananda, A, Denisov, A, Deshpande, E J, Desmond, K V, Dharmawardane, O, Dietzsch, A, Dion, M, Donadelli, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, D, Dutta, L, D'Orazio, S, Edwards, Y V, Efremenko, F, Ellinghaus, T, Engelmore, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, T, Fusayasu, I, Garishvili, A, Glenn, H, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, G, Grim, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hamblen, R, Han, J, Hanks, E, Haslum, R, Hayano, X, He, M, Heffner, T K, Hemmick, T, Hester, J C, Hill, M, Hohlmann, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, D, Hornback, S, Huang, T, Ichihara, R, Ichimiya, Y, Ikeda, K, Imai, M, Inaba, D, Isenhower, M, Ishihara, M, Issah, A, Isupov, D, Ivanischev, Y, Iwanaga, B V, Jacak, J, Jia, X, Jiang, J, Jin, B M, Johnson, T, Jones, K S, Joo, D, Jouan, D S, Jumper, F, Kajihara, J, Kamin, J H, Kang, J, Kapustinsky, K, Karatsu, M, Kasai, D, Kawall, M, Kawashima, A V, Kazantsev, T, Kempel, A, Khanzadeev, K M, Kijima, J, Kikuchi, A, Kim, B I, Kim, D J, Kim, E J, Kim, Y-J, Kim, E, Kinney, Á, Kiss, E, Kistenev, L, Kochenda, B, Komkov, M, Konno, J, Koster, A, Král, A, Kravitz, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, D M, Lee, J, Lee, K B, Lee, K S, Lee, M J, Leitch, M A L, Leite, X, Li, P, Lichtenwalner, P, Liebing, L A, Linden Levy, T, Liška, A, Litvinenko, H, Liu, M X, Liu, B, Love, D, Lynch, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, E, Mannel, Y, Mao, H, Masui, F, Matathias, M, McCumber, P L, McGaughey, N, Means, B, Meredith, Y, Miake, T, Mibe, A C, Mignerey, K, Miki, A, Milov, J T, Mitchell, A K, Mohanty, H J, Moon, Y, Morino, A, Morreale, D P, Morrison, T V, Moukhanova, T, Murakami, J, Murata, S, Nagamiya, J L, Nagle, M, Naglis, M I, Nagy, I, Nakagawa, Y, Nakamiya, K R, Nakamura, T, Nakamura, K, Nakano, S, Nam, J, Newby, M, Nguyen, M, Nihashi, R, Nouicer, A S, Nyanin, C, Oakley, E, O'Brien, S X, Oda, C A, Ogilvie, M, Oka, K, Okada, Y, Onuki, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, I H, Park, S K, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, R, Petti, C, Pinkenburg, R P, Pisani, M, Proissl, M L, Purschke, H, Qu, J, Rak, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, E, Richardson, D, Roach, G, Roche, S D, Rolnick, M, Rosati, C A, Rosen, S S E, Rosendahl, P, Rukoyatkin, P, Ružička, B, Sahlmueller, N, Saito, T, Sakaguchi, K, Sakashita, V, Samsonov, S, Sano, T, Sato, S, Sawada, K, Sedgwick, J, Seele, R, Seidl, R, Seto, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunečka, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, P W, Stankus, E, Stenlund, S P, Stoll, T, Sugitate, A, Sukhanov, J, Sziklai, E M, Takagui, A, Taketani, R, Tanabe, Y, Tanaka, S, Taneja, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, H, Themann, D, Thomas, T L, Thomas, M, Togawa, A, Toia, L, Tomášek, H, Torii, R S, Towell, I, Tserruya, Y, Tsuchimoto, C, Vale, H, Valle, H W, van Hecke, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, M, Virius, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, F, Wei, R, Wei, J, Wessels, S N, White, D, Winter, C L, Woody, R M, Wright, M, Wysocki, Y L, Yamaguchi, K, Yamaura, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, Z, You, G R, Young, I, Younus, I E, Yushmanov, W A, Zajc, S, Zhou, and L, Zolin
Abstract: Back-to-back hadron pair yields in d+Au and p+p collisions at √s(NN)=200 GeV were measured with the PHENIX detector at the Relativistic Heavy Ion Collider. Rapidity separated hadron pairs were detected with the trigger hadron at pseudorapidity |η|0.35 and the associated hadron at forward rapidity (deuteron direction, 3.0η3.8). Pairs were also detected with both hadrons measured at forward rapidity; in this case, the yield of back-to-back hadron pairs in d+Au collisions with small impact parameters is observed to be suppressed by a factor of 10 relative to p+p collisions. The kinematics of these pairs is expected to probe partons in the Au nucleus with a low fraction x of the nucleon momenta, where the gluon densities rise sharply. The observed suppression as a function of nuclear thickness, p(T), and η points to cold nuclear matter effects arising at high parton densities.
Published: 2011

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