Author: "Kazuyoshi Kurita" / Topic: 010306 general physics - Searchworks@Jio Institute Digital Library Search Results

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49 results on '"Kazuyoshi Kurita"'

1. Electron scattering from 208Pb and 132Xe ions at the SCRIT facility

Author: Toshimi Suda, Masanori Wakasugi, Tadaaki Tamae, Mamoru Togasaki, Masahiro Hara, Toshitada Hori, Keita Kasama, Tetsuya Ohnishi, Kazuyoshi Kurita, Kyo Tsukada, Masamitsu Watanabe, Mitsuki Hori, Kousuke Adachi, A. Enokizono, K. Namba, Takahiro Fujita, Shin-ichi Ichikawa, and K. Yamada
Subjects: Physics, Elastic scattering, Nuclear and High Energy Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Momentum transfer, Nuclear structure, Charge density, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, Ion, Nuclear physics, 0103 physical sciences, Atomic nucleus, Physical and Theoretical Chemistry, 010306 general physics, Electron scattering
Abstract: We constructed the SCRIT (Self-Confining Radioactive Ion Target) electron scattering facility to realize electron scattering off short-lived unstable nuclei at RIKEN in Japan. Electron scattering is one of the most powerful and reliable tools to study structures of atomic nuclei. However, it has been extremely difficult to apply electron scattering to unstable nuclei because of target preparation problems. SCRIT is a novel ion-trapping technique that achieves high luminosity of more than 1027 cm-?2s-?1 with a small amount of target ions. Following completion of the facility, a series of commissioning experiments of the entire facility with several stable nuclear targets, including 208Pb and 132Xe, were performed. Momentum transfer distributions of elastic scattering from those targets were successfully measured at several electron beam energies, and the charge density distribution of the 132Xe nucleus was extracted for the first time.
Published: 2019

2. Dilepton mass spectra in p+p collisions at s=200 GeV and the contribution from open charm

Author: K. S. Joo, K. N. Barish, Hiroaki Ohnishi, T. Ichihara, J. Chiba, Matthew G. Reuter, M. L. Brooks, Takahiro Fusayasu, Tadaaki Isobe, A. Deshpande, A. P.T. Palounek, Alexander Malakhov, L. Tomášek, Takao Sakaguchi, D. Sharma, D. Silvermyr, P. L. McGaughey, Xingguo Li, C. Klein-Boesing, L. S. Zolin, W. J. Park, X. He, O. O. Omiwade, M. Chiu, V. S. Pantuev, P. D. Barnes, A. Yanovich, V. Peresedov, Tae-Yeon Lee, A. V. Kazantsev, Martin Purschke, A. D. Frawley, T. Tabaru, P. Mikeš, Herve Borel, D. Lynch, T. C. Awes, Kyoichiro Ozawa, T. Liška, Jun Kikuchi, Christophe Pierre Suire, Alexander Milov, J. Gosset, S. P. Sorensen, Dylan Walker, S. Batsouli, H. Masui, A. K. Dubey, D. Kotchetkov, J. G. Lajoie, S. H. Aronson, W. Holzmann, Saskia Mioduszewski, Junji Tojo, S. N. White, I. Younus, T. Hachiya, Y. L. Yamaguchi, B. Komkov, A. A. Bickley, B. Love, I. J. Choi, Minghui Liu, A. Kravitz, Youngil Kwon, C. Silvestre, A. Morreale, R. A. Soltz, Alexei Khanzadeev, Kenneth Francis Read, Z. Fraenkel, M. Gonin, K. Okada, V. L. Rykov, T. Dahms, A. G. Litvinenko, Norio Saito, A. Soldatov, M. A. L. Leite, J. Velkoška, D. Kawall, Marisilvia Donadelli, V. Bumazhnov, H. Pereira, Andry Malala Rakotozafindrabe, B. Sahlmueller, B. Azmoun, A. Král, M. J. Kweon, M. Rosati, K. Das, H. En'yo, K. Tanida, M. J. Leitch, Hiroyuki Okada, M. Grosse Perdekamp, E. P. Hartouni, Maya Hachiya Shimomura, Y. I. Makdisi, J. Jin, O. Zaudtke, M. Ouchida, M. Issah, H. A. Gustafsson, M. Mitrovski, E. Stenlund, A. A. Vinogradov, V. I. Kochetkov, H. Sakata, A. Kozlov, I. Nakagawa, J. Asai, C. Zhang, M. Virius, E. M. Takagui, Eva Haslum, R. S. Towell, O. Drapier, Frank Ellinghaus, B. Lenzi, M. D. Malik, M. Oka, E. Vznuzdaev, I. Garishvili, Akio Kiyomichi, J. Murata, E. R. Kinney, R. Seto, K. Haruna, S. Yokkaichi, M. J. Tannenbaum, D. P. Morrison, S. Campbell, A. Dion, Jiangyong Jia, Y. Goto, Jan Rak, V. Babintsev, V. E. Semenov, T. A. Shibata, N. N. Ajitanand, M. Wysocki, Viktor Riabov, Shingo Sakai, Atsushi Taketani, A. Enokizono, J. Zimányi, Tatsuya Chujo, N. Kurihara, A. Glenn, R. Lacey, R. Granier de Cassagnac, Gerd Joachim Kunde, I. Shein, D. Mukhopadhyay, S. Rembeczki, G. S. Kyle, A. Hadj Henni, Rushan Han, A. Adare, S. Afanasiev, A. Ster, James Alexander, I. Tserruya, S. Butsyk, Yu. Efremenko, V. Singh, C. Y. Chi, Vladimir Samsonov, K. Boyle, Robert F. Hobbs, Wei Xie, D. Winter, M. P. Comets, J. G. Boissevain, Masashi Kaneta, D. Yu Peressounko, M. K. Lee, C. L. Woody, Takahiro Nakamura, R. Averbeck, Byung-Sik Hong, P. Tarján, Debashish Pal, D. Hornback, M. Heffner, A. Bazilevsky, S. Sawada, C. P. Singh, Alberto Baldisseri, B. M. Johnson, K. Dehmelt, Jen-Chieh Peng, Susumu Oda, J. Ying, A. Franz, A. Durum, A. Taranenko, Kazushi Miki, Philippe Rosnet, C. Pinkenburg, Tamas Ferenc Csorgo, J. L. Nagle, Alexandre Lebedev, D. Isenhower, A. Toia, Dong Jo Kim, Osamu Jinnouchi, O. Dietzsch, E. T. Atomssa, H. Valle, D. M. Lee, A. Isupov, J. Sziklai, Senta Greene, S. F. Pate, M. Stepanov, G. Roche, L. Mašek, Y. J. Mao, T. V. Moukhanova, S. Kametani, I. V. Sourikova, Brian Cole, Anne Marie Sickles, D. E. Fields, B. V. Jacak, B. E. Norman, H. Al-Bataineh, M. Naglis, E. O'Brien, X. R. Wang, J. H. Kang, M. McCumber, E. H. Kim, J. S. Haggerty, S. Esumi, A. Romana, C. L. Silva, I. Ravinovich, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, Masayasu Ishihara, V. Papavassiliou, Sébastien Gadrat, Y. Nagata, Susumu Sato, Sergey Fokin, G. R. Young, T. L. Thomas, L. Aphecetche, T. Horaguchi, Ryugo S. Hayano, Y. Riabov, Y. S. Lai, Kenta Shigaki, K. S. Sim, M. Nguyen, V. Dzhordzhadze, Y. Watanabe, A. S. Nyanin, R. Bennett, J. L. Charvet, H. Hiejima, M. Finger, Y. Fukao, A. Shevel, T. Hester, T. E. Miller, Johannes Peter Wessels, V-N. Tram, F. Matathias, Kensuke Homma, Motoi Inaba, Mate Csanad, P. Chung, P. Constantin, S. Chernichenko, David D'Enterria, M. N. Wagner, W. S. Emam, B. Bassalleck, M. Konno, J. T. Mitchell, R. Seidl, Vladislav Manko, H. Kanou, Taku Gunji, H. Gong, M. Slunečka, J. Seele, F. Kajihara, S. Belikov, H. Delagrange, S. Zhou, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, Y. Nakamiya, G. Baksay, K. O. Eyser, A. K. Purwar, K. Fujiwara, K. Imai, C. A. Ogilvie, T. K. Hemmick, Yasuo Miake, H. W. Van Hecke, L. Kochenda, J. Egdemir, Jason Kamin, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, A. Churyn, S. Bathe, D. Jouan, R. Pak, Agneta Oskarsson, N. Kamihara, R. Armendariz, Kazuyoshi Kurita, A. Drees, J. Kubart, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, A. Kiss, Z. Yasin, Henner Buesching, Steven E. Skutnik, Marcus Hohlmann, H. Qu, Hideki Hamagaki, K. Aoki, G. David, N. Grau, K. Shoji, P. W. Stankus, C. R. Cleven, C. Haegemann, Y. Inoue, R. Vértesi, Dong-Hun Kim, Jason Newby, J. E. Frantz, E. J. Desmond, Charles Maguire, M. Togawa, J. Park, Y. Tsuchimoto, I. E. Yushmanov, E. Kistenev, H. Harada, M. B. Deaton, Y. Tanaka, F. Staley, L. Baksay, H. Pei, K. Nakano, W. E. Sondheim, P. A. Rukoyatkin, John Hill, H. A. Torii, Toru Sugitate, L. D. Isenhower, François Fleuret, and S. Takagi
Subjects: Quantum chromodynamics, Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, 01 natural sciences, Nuclear physics, Yield (chemistry), 0103 physical sciences, Mass spectrum, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, 010306 general physics, Lepton
Abstract: PHENIX has measured the electron-positron pair mass spectrum from 0 to 8 GeV/c(2) in p + p collisions at root s = 200 GeV. The contributions from light meson decays to e(+)e(-) pairs have been determined based on measurements of hadron production cross sections by PHENIX. Within the systematic uncertainty of similar to 20% they account for all e(+)e(-) pairs in the mass region below similar to 1 GeV/c(2). The e(+)e(-) pair yield remaining after subtracting these contributions is dominated by semileptonic decays of charmed hadrons correlated through flavor conservation. Using the spectral shape predicted by PYTHIA, we estimate the charm production cross section to be 544 +/- 39(stat) +/- 142(syst) +/- 200(model) pb. which is consistent with QCD calculations and measurements of single leptons by PHENIX. (C) 2008 Elsevier BV. All rights reserved.
Published: 2009

3. Correlated production of p and p¯ in Au+Au collisions at sNN=200 GeV

Author: J. Chiba, M. B. Deaton, R. A. Soltz, H. Borel, M. Grosse Perdekamp, Y. Tanaka, T. K. Shea, G. C. Mishra, Takao Sakaguchi, S. Bathe, Agneta Oskarsson, B. Love, Marie Germain, J. L. Charvet, C. R. Cleven, C. Haegemann, Y. Inoue, C. Klein-Boesing, A. D. Frawley, Y. Berdnikov, Y. Akiba, S. Afanasiev, A. Ster, I. Tserruya, A. G. Litvinenko, P. J. Kroon, T. Tabaru, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, J. Newby, G. Roche, T. E. Miller, E. T. Atomssa, S. Esumi, Yu. Efremenko, V. Singh, Dong-Hun Kim, S. H. Aronson, L. Baksay, Vaclav Vrba, Klaus Johannes Reygers, Charles Maguire, P. Chung, Robert F. Hobbs, T. Hester, W. A. Zajc, V. Baublis, M. Issah, Debashish Pal, S. Sawada, A. Kozlov, W. Holzmann, J. Ying, A. Franz, S. Leckey, Josh Moss, E. Kistenev, D. Hornback, M. Heffner, A. Denisov, S. Belikov, K. S. Joo, V. Cianciolo, R. Seto, K. Haruna, M. Mitrovski, Y. L. Yamaguchi, Tadaaki Isobe, Maya Hachiya Shimomura, Y. I. Makdisi, A. Taranenko, Kazushi Miki, M. Wysocki, Sergey Fokin, M. Holmes, M. D. Malik, E. Vznuzdaev, D. Winter, M. P. Comets, D. Yu Peressounko, V. Dzhordzhadze, Hirohiko Sato, Alexei Khanzadeev, H. Harada, H. Pei, J. S. Chai, T. Horaguchi, N. Grau, K. Shoji, A. Kiss, E. Stenlund, J. L. Drachenberg, S. F. Pate, W. S. Emam, P. L. McGaughey, P. Tarján, J. M. Burward-Hoy, B. Komkov, Norio Saito, M. A. L. Leite, S. Batsouli, X. He, Y. Nakamiya, S. K. Tuli, O. O. Omiwade, K. Dehmelt, P. W. Stankus, M. J. Tannenbaum, Marisilvia Donadelli, V. Bumazhnov, Z. Yasin, Henner Buesching, H. Sakata, L. Aphecetche, H. Al-Bataineh, V. Papavassiliou, J. Egdemir, M. Chiu, T. A. Shibata, S. P. Sorensen, V. Peresedov, Y. Le Bornec, K. Hasuko, Steven E. Skutnik, Jason Kamin, M. C. McCain, G. Baksay, V-N. Tram, S. Kelly, N. N. Ajitanand, Dylan Walker, W. C. Smith, Marcus Hohlmann, Andry Malala Rakotozafindrabe, Senta Greene, D. Isenhower, D. Mukhopadhyay, S. Rembeczki, D. Sharma, Jen-Chieh Peng, K. Das, B. Forestier, Jan Rak, Hiroyuki Okada, V. Babintsev, A. P.T. Palounek, S. P. Stoll, A. Toia, L. Mašek, M. T. Bjorndal, Johannes Peter Wessels, B. E. Norman, Minghui Liu, D. Bucher, E. P. Hartouni, H. Masui, A. K. Dubey, Joakim Nystrand, G. S. Kyle, Tae-Yeon Lee, Eva Haslum, B. Lenzi, Martin Purschke, F. Gastineau, H. Qu, R. Granier de Cassagnac, M. K. Lee, Takahiro Nakamura, A. Adare, P. Rosnet, Kenneth Francis Read, Xiong Wang, A. A. Bickley, K. O. Eyser, S. S.E. Rosendahl, G. Bunce, K. Fujiwara, H. A. Gustafsson, Susumu Oda, D. Kotchetkov, T. Shohjoh, H. Kanou, Taku Gunji, H. Gong, L. Tomášek, A. Hadj Henni, A. V. Kazantsev, S. Takagi, Hideki Hamagaki, K. Aoki, G. David, T. V. Moukhanova, C. Zhang, J. Seele, James Alexander, R. Averbeck, Byung-Sik Hong, A. Durum, V. S. Pantuev, A. Bazilevsky, K. N. Barish, F. Kajihara, F. Matathias, Dong Jo Kim, A. Morreale, Osamu Jinnouchi, A. Churyn, Z. Fraenkel, P. Mikeš, Kensuke Homma, E. O'Brien, Catherine Micaela Silvestre, D. S. Brown, Motoi Inaba, J. G. Lajoie, T. Hachiya, H. Delagrange, K. Boyle, D. Jouan, Wei Xie, Yoichiro Fukao, M. Harvey, Roy A. Lacey, R. Vértesi, B. Azmoun, A. Král, M. J. Kweon, S. Chernichenko, H. Lim, Alexandre Lebedev, Viktor Riabov, T. C. Awes, D. M. Lee, B. Bassalleck, Anne Marie Sickles, Junji Tojo, D. E. Fields, S. Zhou, Kyoichiro Ozawa, T. Liška, Mate Csanad, Rushan Han, M. N. Hagiwara, Jun Kikuchi, M. Konno, B. V. Jacak, H. W. Van Hecke, C. A. Ogilvie, M. L. Brooks, I. J. Choi, A. Baldisseri, J. T. Mitchell, A. Kravitz, M. McCumber, A. K. Purwar, K. Okada, M. Oka, Hiroaki Ohnishi, Y. S. Kim, A. Dion, R. Seidl, S. Butsyk, Vladislav Manko, Christophe Pierre Suire, Alexander Milov, T. K. Hemmick, I. Nakagawa, M. Slunečka, Yasuo Miake, Vladimir Samsonov, Atsushi Taketani, A. Enokizono, I. Otterlund, B. Sahlmueller, E. H. Kim, H. En'yo, P. Constantin, M. J. Leitch, O. Drapier, Frank Ellinghaus, G. R. Young, E. R. Kinney, D. P. Morrison, L. Kochenda, N. Willis, C. Vale, T. Kawagishi, S. Campbell, B. S. Chang, Christine Angela Aidala, J. Klay, V. E. Semenov, J. Zimányi, R. Pak, Tamas Ferenc Csorgo, K. S. Sim, J. L. Nagle, Tatsuya Chujo, N. Kamihara, Y. Kwon, R. Armendariz, Xingguo Li, M. Gonin, H. Hiejima, Kazuyoshi Kurita, E. J. Desmond, T. L. Thomas, David D'Enterria, K. Imai, A. Drees, Xiao-yan Li, J. Kubart, H. Pereira, M. Togawa, J. Park, Florian Bauer, Ryugo S. Hayano, R. P. Pisani, Y. Riabov, Y. Tsuchimoto, Kenta Shigaki, M. Nguyen, I. E. Yushmanov, Nikolay Tyurin, A. S. Nyanin, M. N. Wagner, J. E. Frantz, M. Ouchida, J. Asai, Shingo Sakai, C. L. Woody, A. Shevel, D. Lynch, I. V. Sourikova, A. Glenn, V. L. Rykov, T. Dahms, I. Ravinovich, Y. Nagata, A. Deshpande, Y. Watanabe, S. S. Ryu, T. Ichihara, I. Younus, Matthew G. Reuter, A. Soldatov, D. Kawall, K. Tanida, V. I. Kochetkov, Takahiro Fusayasu, J. Murata, R. Bennett, Gerd Joachim Kunde, I. Shein, C. P. Singh, B. M. Johnson, I. D. Ojha, Alexander Malakhov, A. Isupov, Ahmed Al-Jamel, M. Finger, J. Sziklai, D. Silvermyr, Brian Cole, M. Naglis, L. S. Zolin, C. L. Silva, Saskia Mioduszewski, W. J. Park, Masayasu Ishihara, O. Zaudtke, Susumu Sato, F. Staley, M. Virius, P. D. Barnes, A. Yanovich, J. Jin, E. M. Takagui, R. S. Towell, S. Y. Fung, I. Garishvili, Akio Kiyomichi, N. Kurihara, Y. Cobigo, M. G. Hur, C. Y. Chi, John Hill, H. A. Torii, Toru Sugitate, L. D. Isenhower, François Fleuret, S. N. White, K. Nakano, W. E. Sondheim, O. Dietzsch, H. Valle, Y. J. Mao, S. Kametani, P. A. Rukoyatkin, J. H. Kang, Julia Velkovska, J. S. Haggerty, A. Romana, M. Rosati, S. Gadrat, Bruno Espagnon, A. A. Vinogradov, Henrik Tydesjö, Jiangyong Jia, Y. S. Lai, Y. Goto, J. Gosset, J. P. Sullivan, S. Yokkaichi, J. M. Heuser, J. G. Boissevain, Masashi Kaneta, C. Pinkenburg, and M. Stepanov
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Meson, 010308 nuclear & particles physics, Nuclear Theory, High Energy Physics::Phenomenology, Parton, 01 natural sciences, Nuclear physics, Baryon, 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, 010306 general physics, Sign (mathematics), Bar (unit)
Abstract: Correlations between p and (p) over bar at transverse momenta typical of enhanced baryon production in Au + Au collisions are reported. The PHENIX experiment has measured same and opposite sign baryon pairs in Au + Au collisions at root s(NN) = 200 GeV. Correlated production of p and p with the trigger particle from the range 2.5 < p(T) < 4.0 GeV/c and the associated particle with 1.8 < p(T) < 2.5 GeV/c is observed to be nearly independent of the centrality of the collisions. Same sign pairs show no correlation at any centrality. The conditional yield of mesons triggered by baryons (and anti-baryons) and mesons in the same p(T) range rises with increasing centrality, except for the most central collisions, where baryons show a significantly smaller number of associated mesons. These data are consistent with a picture in which hard scattered partons produce correlated p and (p) over bar in the p(T) region of the baryon excess. (c) 2007 Elsevier B.V. All rights reserved.
Published: 2007

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. Measurement of neutral mesons inp+pcollisions ats=200 GeVand scaling properties of hadron production

Author: X. He, O. O. Omiwade, L. Aphecetche, K. Sakashita, P. Tarján, V. Peresedov, C. L. Woody, A. Berdnikov, J. Egdemir, Jason Kamin, T. Csörgő, S. P. Stoll, W. A. Zajc, J. Koster, V. S. Pantuev, Senta Greene, V. Baublis, A. Denisov, S. S.E. Rosendahl, Johannes Peter Wessels, V. Cianciolo, Y. Tomita, G. Bunce, A. T. Basye, Maya Hachiya Shimomura, M. Rosati, B. Meredith, Sergey Fokin, I. V. Sourikova, E. H. Kim, B. E. Norman, B. Fadem, E. O'Brien, J. T. Mitchell, A. Churyn, A. V. Kazantsev, S. Batsouli, H. Masui, A. K. Dubey, C. Baumann, Junji Tojo, Anne Marie Sickles, C. P. Singh, D. Jouan, B. M. Johnson, A. Isupov, Y. I. Makdisi, M. B. Deaton, J. Sziklai, Brian Cole, John Hill, R. Seidl, A. A. Bickley, R. A. Soltz, K. Okada, Toru Sugitate, L. D. Isenhower, A. Hadj Henni, M. Grosse Perdekamp, B. Sahlmueller, Y. Tanaka, H. En'yo, G. R. Young, S. Takagi, Vladislav Manko, M. J. Leitch, M. J. Tannenbaum, Beomkyu Kim, K. Boyle, Wei Xie, H. A. Gustafsson, M. Ouchida, M. Slunečka, Mate Csanad, N. Means, J. Asai, K. N. Barish, C. A. Ogilvie, G. S. Kyle, H. Torii, François Fleuret, I. Tserruya, C. Zhang, T. K. Hemmick, James Alexander, Yu. Efremenko, M. Mitrovski, P. Ružička, D. Winter, Yasuo Miake, D. Mukhopadhyay, S. Rembeczki, R. Averbeck, Byung-Sik Hong, K. S. Sim, A. Bazilevsky, T. Ichihara, S. Belikov, L. Tomášek, D. Yu Peressounko, P. Mikeš, A. A. Vinogradov, Viktor Riabov, V. Dzhordzhadze, Y. Kwon, Matthew G. Reuter, Philippe Rosnet, Hiroaki Ohnishi, K. B. Lee, Takahiro Fusayasu, Shingo Sakai, K. A. Drees, T. L. Thomas, F. Staley, L. Baksay, V. Singh, S. Bathe, H. Pei, Alexander Malakhov, L. Kochenda, R. Yang, M. Wysocki, H. Hiejima, M. L. Brooks, H. Iinuma, J. Chiba, Ryugo S. Hayano, Y. Riabov, I. Ravinovich, Takao Sakaguchi, B. Azmoun, A. Král, M. J. Kweon, Agneta Oskarsson, M. K. Lee, Alexandre Lebedev, D. M. Lee, K. Kiriluk, Y. L. Yamaguchi, B. Komkov, Y. Berdnikov, Jiangyong Jia, Y. Goto, B. Love, Robert F. Hobbs, Y. Akiba, C. Klein-Boesing, M. I. Nagy, A. P.T. Palounek, R. Pak, N. Kamihara, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, M. Issah, Kenta Shigaki, M. Nguyen, M. Mishra, S. Nagamiya, A. D. Frawley, T. Tabaru, K. Imai, Norio Saito, M. D. Malik, E. Vznuzdaev, R. Armendariz, M. A. L. Leite, F. Matathias, K. Das, E. P. Hartouni, David D'Enterria, Vaclav Vrba, Klaus Johannes Reygers, A. G. Litvinenko, S. Huang, Kensuke Homma, R. Vértesi, A. S. Nyanin, S. H. Aronson, Kazuyoshi Kurita, T. C. Awes, Kyoichiro Ozawa, T. Liška, Y. Onuki, K. O. Eyser, A. K. Purwar, K. Fujiwara, J. S. Kapustinsky, P. Constantin, S. Chernichenko, D. Roach, Y. Nagata, A. Drees, W. Holzmann, K. M. Kijima, C. R. Cleven, M. Oka, V. Babintsev, Jun Kikuchi, Jan Rak, Rachid Nouicer, B. Bassalleck, C. Haegemann, Y. Inoue, A. Dion, A. Kozlov, J. Kubart, R. Lacey, Ajit Kumar Mohanty, M. Bai, Debashish Pal, M. Konno, R. Seto, K. Haruna, S. Sawada, R. Granier de Cassagnac, T. A. Shibata, A. Adare, T. Sato, J. E. Frantz, Atsushi Taketani, A. Enokizono, Y. Nakamiya, P. Liebing, M. N. Wagner, Y. Fukao, J. Ying, A. Franz, H. W. Van Hecke, A. Shevel, Charles Maguire, Xingguo Li, Alexei Khanzadeev, Tae-Yeon Lee, G. Baksay, K. Dehmelt, E. Stenlund, Martin Purschke, H. Sakata, T. Hester, Kiyoshi Tanida, A. Kiss, O. Dietzsch, Jen-Chieh Peng, E. Kistenev, Z. Yasin, Henner Buesching, E. T. Atomssa, H. Valle, S. P. Sorensen, Dylan Walker, Dipanwita Dutta, D. Isenhower, T. V. Moukhanova, C. M. Camacho, D. Kotchetkov, Marcus Hohlmann, Prashant Shukla, A. Toia, E. J. Desmond, H. Harada, A. Morreale, Julia Velkovska, V-N. Tram, N. Grau, S. F. Pate, Minghui Liu, L. Mašek, Seong H. Kim, D. E. Fields, M. Togawa, J. Park, T. Kempel, Dong-Hun Kim, Xiong Wang, B. V. Jacak, Z. Fraenkel, Motoi Inaba, M. Heffner, J. G. Lajoie, Y. Tsuchimoto, T. Hachiya, R. Bennett, T. Niita, Dong Jo Kim, Osamu Jinnouchi, Kenneth Francis Read, I. E. Yushmanov, H. Al-Bataineh, I. J. Choi, A. Kravitz, M. McCumber, R. K. Choudhury, Tadaaki Isobe, M. Gonin, K. S. Joo, J. L. Charvet, V. Papavassiliou, M. Finger, Sébastien Gadrat, A. Veicht, P. L. McGaughey, A. Sukhanov, H. Pereira, M. Chiu, Y. Morino, T. E. Miller, M. Kurosawa, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, S. Esumi, N. N. Ajitanand, E. R. Kinney, Herve Borel, D. P. Morrison, S. Campbell, D. Lynch, D. Sharma, V. E. Semenov, J. Zimányi, R. Ichimiya, Tatsuya Chujo, P. Chung, Eva Haslum, B. Lenzi, Steven E. Skutnik, J. Imrek, V. L. Rykov, T. Dahms, Takahiro Nakamura, S. Dairaku, W. S. Emam, S. Afanasiev, O. Zaudtke, Susumu Oda, A. Ster, H. Kanou, Taku Gunji, H. Gong, J. Seele, M. Virius, F. Kajihara, J. Newby, H. Delagrange, A. Durum, K. Yamaura, S. Zhou, A. Glenn, S. D. Rolnick, D. Hornback, H. Qu, A. Taranenko, Kazushi Miki, Hideki Hamagaki, K. Aoki, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, G. David, Brajesh K. Singh, H. Liu, S. N. White, K. Shoji, Zvi Hirsh Citron, K. Nakano, P. W. Stankus, W. E. Sondheim, D. Ivanischev, Saskia Mioduszewski, P. A. Rukoyatkin, J. Jin, E. M. Takagui, R. S. Towell, I. Garishvili, Akio Kiyomichi, F. Wei, N. Kurihara, C. Y. Chi, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Masashi Kaneta, C. Pinkenburg, M. Stepanov, G. Roche, Y. J. Mao, S. Kametani, T. Horaguchi, J. H. Kang, J. S. Haggerty, A. Romana, Y. S. Lai, A. Yu. Semenov, J. Gosset, S. Butsyk, Vladimir Samsonov, S. Yokkaichi, J. L. Nagle, C. Silvestre, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, R. Tanabe, D. Layton, W. C. Chang, Rushan Han, D. Kawall, H. Themann, V. I. Kochetkov, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, Alberto Baldisseri, M. Naglis, C. L. Silva, Masayasu Ishihara, Susumu Sato, A. Deshpande, Y. Watanabe, I. Younus, and A. Soldatov
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Hadron, Omega baryon, 01 natural sciences, 7. Clean energy, Omega, Nuclear physics, Baryon, Particle decay, 0103 physical sciences, Tsallis distribution, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: The PHENIX experiment at the Relativistic Heavy Ion Collider has measured the invariant differential cross section for production of K-S(0), omega, eta', and phi mesons in p + p collisions at root s 200 GeV. Measurements of omega and phi production in different decay channels give consistent results. New results for the omega are in agreement with previously published data and extend the measured p(T) coverage. The spectral shapes of all hadron transverse momentum distributions measured by PHENIX are well described by a Tsallis distribution functional form with only two parameters, n and T, determining the high-p(T) and characterizing the low-p(T) regions of the spectra, respectively. The values of these parameters are very similar for all analyzed meson spectra, but with a lower parameter T extracted for protons. The integrated invariant cross sections calculated from the fitted distributions are found to be consistent with existing measurements and with statistical model predictions.
Published: 2011

13. Cross Section and Parity-Violating Spin Asymmetries ofW±Boson Production in Polarizedp+pCollisions ats=500 GeV

Author: M. Kasai, A. Deshpande, B. Meredith, Alice Mignerey, John Hill, Toru Sugitate, L. D'Orazio, M. Sarsour, Mate Csanad, François Fleuret, D. Watanabe, A. Iordanova, T. Ichihara, Takahiro Fusayasu, Alexander Malakhov, D. Silvermyr, L. S. Zolin, A. Yanovich, Takao Sakaguchi, M. Mendoza, S. N. White, E. Vznuzdaev, Y. J. Kwon, Deepa Thomas, Marisilvia Donadelli, V. Bumazhnov, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, D. Kotov, Dmitry Blau, E. J. Desmond, M. Ouchida, N. Means, A. D. Frawley, M. Nihashi, Alexander Milov, I. Nakagawa, Atsushi Takahara, Aaron Angerami, Hongfang Liu, R. Tanabe, Young-Ki Kim, T. Engelmore, T. Murakami, D. E. Fields, B. Love, J. S. Kang, K. A. Drees, S. Huang, Y. L. Yamaguchi, Y. Watanabe, Jason Kamin, M. Togawa, E. Vazquez-Zambrano, W. A. Zajc, M. Rosati, K. B. Lee, B. V. Jacak, R. S. Towell, I. Ravinovich, Y. Ikeda, V. Baublis, I. Younus, S. P. Stoll, A. Denisov, C. Harper, E. J. Mannel, E. R. Kinney, V. Cianciolo, T. Kempel, D. P. Morrison, A. G. Litvinenko, W. Holzmann, S. Kaneti, H. Pei, S. Campbell, S. Sawada, Y. Miyachi, Y. Tsuchimoto, Sergey Fokin, Y. Iwanaga, B. H. Kang, I. Garishvili, T. Csörgő, F. Wei, R. P. Pisani, M. Bai, V. S. Pantuev, J. Ying, A. Franz, S. S.E. Rosendahl, G. Bunce, Rushan Han, A. Dion, M. I. Nagy, Maya Hachiya Shimomura, R. S. Hollis, I. E. Yushmanov, M. Kurosawa, H. W. Van Hecke, A. Enokizono, H. Al-Ta'Ani, Tatsuya Chujo, B. Azmoun, A. Král, Jiangyong Jia, Y. Goto, Y. I. Makdisi, R. Akimoto, Johannes Peter Wessels, E. C. Aschenauer, M. McCumber, I. Tserruya, J. Hamblen, Vladimir Samsonov, M. Naglis, R. Seto, Senta Greene, D. Roach, D. Jouan, C. L. Woody, A. Berdnikov, Yu. Efremenko, Prashant Shukla, K. V. Dharmawardane, P. L. McGaughey, K. M. Kijima, H. Qu, V. Singh, M. Gonin, C. Pinkenburg, A. T. Basye, A. Kiss, S. F. Pate, A. Caringi, C. Y. Chi, Hideki Hamagaki, K. Aoki, G. David, Ke. Nakamura, K. S. Sim, B. Fadem, E. O'Brien, M. Chiu, K. Hashimoto, A. Datta, D. Kleinjan, Eric Appelt, M. J. Tannenbaum, K. R. Andrews, R. A. Soltz, K. Okada, Beomkyu Kim, O. Drapier, B. Sahlmueller, Y. Fukao, Henner Buesching, H. Iinuma, C. A. Ogilvie, Xingguo Li, Zhiying You, R. Yang, R. Bennett, R. Armendariz, Kisung Lee, T. K. Hemmick, Ajit Kumar Mohanty, Y. J. Mao, H. Torii, M. Grosse Perdekamp, H. En'yo, Masayasu Ishihara, J. Hanks, K. N. Barish, Sung Keun Park, M. J. Leitch, T. Hester, J. M. Durham, M. E. Connors, Yasuo Miake, K. Watanabe, Yosuke Watanabe, T. A. Shibata, C. L. Silva, S. P. Sorensen, S. Taneja, K. Shoji, T. Sato, A. V. Kazantsev, E. Tennant, L. Guo, J. L. Nagle, P. Castera, Alexei Khanzadeev, M. Finger, S. Dairaku, N. N. Ajitanand, X. Gong, L. Kochenda, M. Issah, A. Glenn, I. V. Sourikova, K. Imai, E. Stenlund, S. Sano, J. H. Kang, J. S. Haggerty, S. R. Lee, J. B. Choi, O. Chvala, I. J. Choi, P. W. Stankus, L. A. Linden Levy, D. Kawall, Eunja Kim, M. Savastio, L. Tomášek, S. Motschwiller, H. A. Gustafsson, D. Isenhower, Jan Rak, R. Lacey, Takahiro Nakamura, V. Papavassiliou, K. Utsunomiya, Jen-Chieh Peng, R. Pak, J. G. Lajoie, T. Jones, Ryugo S. Hayano, R. Granier de Cassagnac, Peter Christiansen, H. Themann, M. L. Brooks, Y. Riabov, A. Adare, D. McGlinchey, Agneta Oskarsson, D. Winter, J. E. Frantz, X. He, Kenta Shigaki, M. Virius, Charles Maguire, D. Yu Peressounko, Y. Berdnikov, Y. Akiba, C. McKinney, M. Nguyen, Inkyu Park, Y. Aramaki, V. Peresedov, N. Grau, Xiong Wang, Robert Vertesi, E. M. Takagui, Byoungchoo Park, Kazuyoshi Kurita, Taku Gunji, Z. Conesa del Valle, T. V. Moukhanova, O. Dietzsch, J. Murata, C. Baumann, K. Karatsu, A. Durum, J. Ben-Benjamin, D. Hornback, S. Nagamiya, Viktor Riabov, Gerd Joachim Kunde, Dong Jo Kim, J. Koster, C. Oakley, T. C. Awes, Kyoichiro Ozawa, A. Drees, J. S. Bok, Y. Hori, Anne Marie Sickles, C. P. Singh, A. S. Nyanin, Catherine Micaela Silvestre, Vaclav Vrba, Klaus Johannes Reygers, Y. S. Lai, Rui Wei, B. M. Johnson, Motoi Inaba, H. Masui, S. H. Lee, S. Butsyk, I. Shein, R. J. Petti, A. Veicht, R. M. Wright, K. Sedgwick, A. Isupov, Rachid Nouicer, Kiyoshi Tanida, S. Zhou, M. Oka, A. N. Zelenski, M. Proissl, C. H. Chen, G. R. Young, A. Sukhanov, J. Sziklai, H. Pereira, Minghui Liu, S. D. Rolnick, A. Manion, E. Kistenev, J. S. Yoo, Brian Cole, M. K. Dayananda, Julia Velkovska, Y. Morino, Kenneth Francis Read, M. Wysocki, P. Kline, B. Bannier, P. Lichtenwalner, T. Sodre, Jongmin Lee, J. Sun, S. Yokkaichi, Atsushi Taketani, Y. Tanaka, D. Lynch, Martin Purschke, H. J. Moon, D. Broxmeyer, A. Morreale, R. K. Choudhury, K. S. Joo, N. Apadula, A. Vossen, S. Esumi, D. Sharma, J. T. Mitchell, R. Ichimiya, R. Seidl, Vladislav Manko, M. Slunečka, C. Vale, S. Afanasiev, Christine Angela Aidala, S. Bathe, Kensuke Homma, E. Richardson, J. Newby, G. Roche, K. I. Hahn, B. Bassalleck, M. Konno, Y. Nakamiya, Y. J. Kim, A. Taranenko, Kazushi Miki, T. Horaguchi, Brajesh K. Singh, S. Tarafdar, Eva Haslum, B. Komkov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, H. H. Shim, S. H. Lim, R. Belmont, J. S. Kapustinsky, V. Babintsev, X. Jiang, M. Tomášek, G. S. Kyle, James Alexander, Byung-Sik Hong, A. Bazilevsky, Alexandre Lebedev, and D. M. Lee
Subjects: Quark, Physics, Particle physics, Antiparticle, 010308 nuclear & particles physics, General Physics and Astronomy, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Fermion, 01 natural sciences, 7. Clean energy, Nuclear physics, Positron, Antimatter, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Boson, Lepton
Abstract: Large parity-violating longitudinal single-spin asymmetries A(L)(e+) = 0.86(-0.14)(+0.30) and Ae(L)(e-) = 0.88(-0.71)(+0.12) are observed for inclusive high transverse momentum electrons and positrons in polarized p + p collisions at a center-of-mass energy of root s = 500 GeV with the PHENIX detector at RHIC. These e(+/-) come mainly from the decay of W-+/- and Z(0) bosons, and their asymmetries directly demonstrate parity violation in the couplings of the W-+/- to the light quarks. The observed electron and positron yields were used to estimate W-+/- boson production cross sections for the e(+/-) channels of sigma(pp -> W+X) X BR(W+ -> e(+) nu(e)) = 144.1 +/- 21.2(stat)(-10.3)(+3.4)(syst) +/- 21.6(norm) pb, and sigma(pp -> W-X) X BR(W- -> e(-) (nu) over bar (e)) = 3.17 +/- 12.1(stat)(-8.2)(+10.1)(syst) +/- 4.8(norm) pb.
Published: 2011

14. Measurement of transverse single-spin asymmetries forJ/ψproduction in polarizedp+pcollisions ats=200 GeV

Author: T. Ichihara, Jongmin Lee, Ryugo S. Hayano, A. Hadj Henni, Y. Riabov, Kenta Shigaki, Mate Csanad, M. Nguyen, Beomkyu Kim, K. Boyle, D. Lynch, Taku Gunji, H. Gong, J. Seele, F. Kajihara, I. Tserruya, Alice Mignerey, Y. Ikeda, A. S. Nyanin, L. D'Orazio, S. Esumi, Aaron Angerami, Wei Xie, M. Nihashi, Rachid Nouicer, K. A. Drees, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, David D'Enterria, Y. Tomita, D. S. Jumper, S. Butsyk, J. G. Boissevain, E. J. Mannel, M. Naglis, S. Afanasiev, Takahiro Fusayasu, V. L. Rykov, T. Dahms, O. Dietzsch, M. Proissl, Vladimir Samsonov, K. V. Dharmawardane, Sergey Fokin, Yu. Efremenko, V. Singh, H. Iinuma, S. Zhou, A. P.T. Palounek, Takao Sakaguchi, C. Klein-Boesing, E. T. Atomssa, H. Valle, Alexander Malakhov, A. Baldisseri, S. D. Rolnick, R. Pak, K. Karatsu, C. Pinkenburg, S. Dairaku, A. D. Frawley, R. P. Pisani, Masayasu Ishihara, A. Ster, Anne Marie Sickles, J. Newby, C. L. Woody, A. Berdnikov, V. S. Pantuev, F. Matathias, Kensuke Homma, D. Silvermyr, E. H. Kim, X. Jiang, O. Zaudtke, J. L. Charvet, S. P. Sorensen, Dipanwita Dutta, M. Issah, T. Kempel, Dong-Hun Kim, H. A. Gustafsson, Tadaaki Isobe, R. A. Soltz, H. Borel, N. Kamihara, K. S. Joo, E. Richardson, M. Virius, C. Zhang, Viktor Riabov, S. Huang, A. Caringi, Julia Velkovska, O. Chvala, S. Bathe, M. Grosse Perdekamp, P. Constantin, S. Chernichenko, W. Holzmann, F. Staley, L. S. Zolin, M. Stepanov, G. Roche, Y. J. Mao, D. Hornback, K. I. Hahn, T. Murakami, Agneta Oskarsson, Y. Berdnikov, M. E. Connors, B. Bassalleck, Seong H. Kim, P. L. McGaughey, Tamas Ferenc Csorgo, W. J. Park, N. Borggren, C. H. Chen, Christopher Rosen, Kazuyoshi Kurita, I. V. Sourikova, B. Love, C. Oakley, A. Drees, M. Heffner, G. R. Young, Y. Akiba, M. Mishra, S. Nagamiya, I. Ravinovich, J. G. Lajoie, Vaclav Vrba, Klaus Johannes Reygers, J. H. Kang, M. Konno, Hongfang Liu, D. E. Fields, B. V. Jacak, N. Apadula, J. L. Nagle, M. Kurosawa, A. Enokizono, P. Chung, P. D. Barnes, A. Yanovich, J. S. Haggerty, M. Chiu, A. Taranenko, Kazushi Miki, T. Horaguchi, M. Bai, M. I. Nagy, K. Okada, B. Sahlmueller, M. Kasai, J. Imrek, I. J. Choi, Y. Onuki, Brajesh K. Singh, A. Kravitz, D. Watanabe, B. Komkov, H. En'yo, M. J. Leitch, K. Sakashita, A. G. Litvinenko, M. Gonin, Jan Rak, K. O. Eyser, A. K. Purwar, K. Fujiwara, T. Jones, A. Glenn, H. Qu, Norio Saito, A. Datta, Y. Nakamiya, Peter Christiansen, Y. L. Yamaguchi, Tsutomu Mibe, M. A. L. Leite, M. Ouchida, N. Means, J. Asai, Eunja Kim, D. Sharma, R. Ichimiya, D. Winter, M. McCumber, R. Lacey, A. V. Kazantsev, S. Tarafdar, R. Granier de Cassagnac, A. Adare, M. D. Malik, E. Vznuzdaev, G. Baksay, D. Yu Peressounko, Jason Kamin, S. Sawada, Hideki Hamagaki, K. Aoki, G. David, P. Tarján, S. N. White, R. Belmont, Eva Haslum, J. S. Kapustinsky, Shingo Sakai, A. Sukhanov, B. Lenzi, V. Babintsev, Deepa Thomas, J. Hanks, H. Pereira, Zhiying You, Marisilvia Donadelli, R. Bennett, Sung Keun Park, B. Azmoun, A. Král, G. S. Kyle, M. J. Kweon, Jen-Chieh Peng, V. Bumazhnov, M. Kawashima, Ajit Kumar Mohanty, Y. Morino, S. P. Stoll, James Alexander, H. Pei, Zvi Hirsh Citron, A. Kozlov, N. N. Ajitanand, Andry Malala Rakotozafindrabe, T. A. Shibata, C. L. Silva, R. Seto, L. Tomášek, Y. S. Lai, M. Finger, R. Averbeck, Byung-Sik Hong, A. Yu. Semenov, S. S.E. Rosendahl, A. Bazilevsky, G. Bunce, H. W. Van Hecke, T. Sato, K. Nakano, Philippe Rosnet, Y. J. Kim, Takahiro Nakamura, K. Haruna, K. S. Sim, R. Tanabe, D. Layton, K. Watanabe, Inkyu Park, J. T. Mitchell, L. Aphecetche, V. Dzhordzhadze, Alexandre Lebedev, J. Gosset, Senta Greene, D. M. Lee, R. Seidl, Y. Kwon, Xiong Wang, W. E. Sondheim, Z. Conesa del Valle, Vladislav Manko, D. Ivanischev, R. Yang, K. Shoji, G. Grim, A. T. Basye, A. Churyn, Susumu Oda, K. B. Lee, D. Jouan, W. C. Chang, M. Slunečka, K. Kiriluk, D. Isenhower, A. Toia, S. Taneja, A. Kiss, S. Belikov, B. Fadem, E. O'Brien, Dong Jo Kim, A. Durum, I. Danchev, L. Mašek, P. A. Rukoyatkin, A. Dion, M. Oka, K. Imai, T. Niita, Henner Buesching, Steve Edwards, Rushan Han, X. He, Catherine Micaela Silvestre, K. Yamaura, P. W. Stankus, Johannes Peter Wessels, C. Vale, B. Meredith, Charles Maguire, B. S. Chang, Christine Angela Aidala, J. Klay, Y. Aramaki, C. A. Ogilvie, V. Peresedov, John Hill, Marcus Hohlmann, Kiyoshi Tanida, A. Veicht, D. Roach, Kisung Lee, T. K. Hemmick, Yasuo Miake, Atsushi Taketani, K. M. Kijima, E. Kistenev, Toru Sugitate, S. Yokkaichi, P. Liebing, Tae-Yeon Lee, P. Ruzicka, L. A. Linden Levy, P. Mikeš, T. C. Awes, Kyoichiro Ozawa, T. Liška, P. Lichtenwalner, J. Koster, Martin Purschke, L. Kochenda, Alexander Milov, I. Nakagawa, T. Engelmore, J. S. Bok, Jun Kikuchi, François Fleuret, Xingguo Li, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, Y. Tanaka, S. Batsouli, H. Masui, A. K. Dubey, S. Campbell, Minghui Liu, A. A. Bickley, V. E. Semenov, H. Al-Ta'Ani, Kenneth Francis Read, H. J. Moon, Tatsuya Chujo, K. N. Barish, L. Baksay, S. Nam, S. Sano, M. L. Brooks, K. Das, E. P. Hartouni, Maya Hachiya Shimomura, Y. I. Makdisi, M. J. Tannenbaum, H. Torii, M. Rosati, A. Kim, D. Mukhopadhyay, S. Rembeczki, Y. Fukao, Alexei Khanzadeev, A. A. Vinogradov, T. Hester, E. Stenlund, J. B. Choi, Jiangyong Jia, Y. Goto, J. Hamblen, V-N. Tram, N. Grau, J. H. Bhom, J. M. Durham, T. V. Moukhanova, Dmitry Blau, Motoi Inaba, E. J. Desmond, R. M. Wright, M. Togawa, E. Vazquez-Zambrano, J. Park, Y. Tsuchimoto, Y. Iwanaga, I. E. Yushmanov, R. Vértesi, J. E. Frantz, A. Deshpande, J. Ying, A. Franz, Y. Watanabe, I. Younus, A. Soldatov, D. Kawall, C. M. Camacho, H. Themann, Prashant Shukla, S. F. Pate, Ke. Nakamura, J. Murata, Gerd Joachim Kunde, I. Shein, H. Al-Bataineh, K. Sedgwick, C. Baumann, S. Kametani, C. P. Singh, B. M. Johnson, V. Papavassiliou, R. J. Petti, A. Morreale, Z. Fraenkel, R. K. Choudhury, A. Isupov, C. Suire, J. Sziklai, M. K. Dayananda, Brian Cole, M. Wysocki, R. S. Towell, I. Garishvili, F. Wei, C. Y. Chi, J. Jin, E. M. Takagui, and T. L. Thomas
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, Transverse plane, Distribution function, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Nucleon, Relativistic Heavy Ion Collider, Spin-½
Abstract: We report the first measurement of transverse single-spin asymmetries in J/psi production from transversely polarized p + p collisions at root s = 200 GeV with data taken by the PHENIX experiment in 2006 and 2008. The measurement was performed over the rapidity ranges 1.2 < vertical bar y vertical bar < 2.2 and vertical bar y vertical bar < 0.35 for transverse momenta up to 6 GeV/c. J/psi production at the Relativistic Heavy Ion Collider is dominated by processes involving initial-state gluons, and transverse single-spin asymmetries of the J/psi can provide access to gluon dynamics within the nucleon. Such asymmetries may also shed light on the long-standing question in QCD of the J/psi production mechanism. Asymmetries were obtained as a function of J/psi transverse momentum and Feynman-x, with a value of -0.086 +/- 0.026(stat) +/- 0.003(syst) in the forward region. This result suggests possible nonzero trigluon correlation functions in transversely polarized protons and, if well defined in this reaction, a nonzero gluon Sivers distribution function.
Published: 2010

15. HighpTdirect photon andπ0triggered azimuthal jet correlations and measurement ofkTfor isolated direct photons inp+pcollisions ats=200 GeV

Author: Ajit Kumar Mohanty, P. Tarján, T. A. Shibata, T. Sato, David D'Enterria, S. Bathe, Agneta Oskarsson, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, Y. Nakamiya, Y. Berdnikov, Y. Akiba, A. V. Kazantsev, E. R. Kinney, D. P. Morrison, S. Campbell, M. Mishra, D. Isenhower, A. Toia, S. Nagamiya, V. E. Semenov, M. N. Wagner, J. Zimányi, C. Baumann, D. Lynch, Tatsuya Chujo, G. Baksay, L. Tomášlek, C. P. Singh, Tae-Yeon Lee, Martin Purschke, L. Mašek, Vaclav Vrba, Klaus Johannes Reygers, I. Tserruya, Yu. Efremenko, S. Butsyk, Vladimir Samsonov, K. Dehmelt, Jen-Chieh Peng, Senta Greene, B. M. Johnson, Xiong Wang, V. Singh, Dong Jo Kim, G. S. Kyle, Osamu Jinnouchi, A. Veicht, James Alexander, A. Isupov, C. Suire, Y. Fukao, T. Niita, A. Shevel, A. T. Basye, B. E. Norman, Maya Hachiya Shimomura, M. Naglis, C. L. Silva, P. Mikeš, J. Sziklai, Y. J. Mao, J. T. Mitchell, S. Kametani, T. Horaguchi, V. L. Rykov, T. Dahms, R. Averbeck, Byung-Sik Hong, Brian Cole, D. Kotchetkov, T. Hester, B. Fadem, I. Ravinovich, Y. I. Makdisi, E. O'Brien, A. Bazilevsky, R. Seidl, J. L. Charvet, Vladislav Manko, M. Slunečka, M. Mitrovski, Philippe Rosnet, B. Love, R. S. Towell, A. Morreale, I. Garishvili, Akio Kiyomichi, F. Wei, Masayasu Ishihara, Y. Nagata, K. O. Eyser, A. K. Purwar, M. Bai, K. Fujiwara, Z. Fraenkel, S. Belikov, Tamas Ferenc Csorgo, R. A. Soltz, H. Borel, E. J. Desmond, T. C. Awes, Kyoichiro Ozawa, T. Liška, T. E. Miller, M. Kurosawa, Jun Kikuchi, H. Iinuma, Alexandre Lebedev, O. Dietzsch, N. Kurihara, E. T. Atomssa, M. J. Tannenbaum, A. G. Litvinenko, D. M. Lee, C. Vale, B. S. Chang, J. L. Nagle, M. Togawa, K. S. Sim, V. Dzhordzhadze, M. Grosse Perdekamp, H. Torii, J. Park, Christine Angela Aidala, R. K. Choudhury, J. Klay, Y. Kwon, H. Valle, Susumu Sato, C. Y. Chi, V-N. Tram, N. Grau, Dipanwita Dutta, Tadaaki Isobe, A. P.T. Palounek, C. A. Ogilvie, K. S. Joo, M. E. Connors, P. Chung, R. Yang, R. Bennett, J. H. Kang, J. S. Haggerty, A. Romana, D. Mukhopadhyay, A. Kozlov, S. Rembeczki, J. Imrek, H. Hiejima, C. L. Woody, A. Berdnikov, K. A. Drees, F. Staley, K. Kiriluk, T. K. Hemmick, M. Wysocki, S. Taneja, R. Seto, K. Haruna, Y. Tsuchimoto, F. Matathias, Saskia Mioduszewski, M. Finger, H. A. Gustafsson, H. W. Van Hecke, Yasuo Miake, P. L. McGaughey, Eva Haslum, J. Chiba, W. S. Emam, M. K. Lee, B. Lenzi, H. Liu, Kensuke Homma, K. Imai, K. Shoji, Motoi Inaba, Julia Velkovska, I. E. Yushmanov, M. Chiu, M. Rosati, P. Constantin, S. Chernichenko, E. H. Kim, S. Dairaku, X. He, O. O. Omiwade, C. Zhang, Alexei Khanzadeev, H. Kanou, Taku Gunji, H. Gong, J. Seele, O. Zaudtke, D. Sharma, D. Winter, D. Kawall, S. Afanasiev, P. W. Stankus, L. Kochenda, B. Bassalleck, A. Ster, H. Themann, J. Jin, M. Konno, V. Peresedov, E. Stenlund, H. Sakata, E. M. Takagui, Takao Sakaguchi, R. Ichimiya, P. Ružička, D. Yu Peressounko, A. Kiss, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, C. Klein-Boesing, J. Newby, J. Koster, F. Kajihara, H. Delagrange, Anne Marie Sickles, M. Virius, B. Azmoun, A. Král, M. J. Kweon, K. Sakashita, A. D. Frawley, T. Tabaru, Robert F. Hobbs, Andry Malala Rakotozafindrabe, Viktor Riabov, Y. S. Lai, S. Batsouli, H. Masui, A. K. Dubey, Z. Yasin, Henner Buesching, V. I. Kochetkov, S. Huang, S. H. Aronson, A. A. Bickley, R. Tanabe, D. Layton, V. S. Pantuev, J. Murata, I. V. Sourikova, J. Egdemir, D. Hornback, Minghui Liu, A. A. Vinogradov, S. Takagi, Jason Kamin, S. Esumi, M. Heffner, S. Zhou, W. Holzmann, K. N. Barish, A. Baldisseri, S. D. Rolnick, M. Oka, C. R. Cleven, G. R. Young, C. Haegemann, Y. Inoue, Junji Tojo, S. P. Stoll, Kenneth Francis Read, A. Taranenko, Jiangyong Jia, Y. Goto, Y. L. Yamaguchi, B. Komkov, A. Dion, T. V. Moukhanova, Gerd Joachim Kunde, I. Shein, W. C. Chang, W. A. Zajc, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Masashi Kaneta, A. Glenn, Kazushi Miki, V. Baublis, A. Denisov, V. Cianciolo, K. Das, R. Vértesi, Y. Onuki, Atsushi Taketani, Marcus Hohlmann, Brajesh K. Singh, S. S.E. Rosendahl, G. Bunce, A. Enokizono, M. Ouchida, T. Kempel, Dong-Hun Kim, K. Sedgwick, P. Liebing, Norio Saito, T. Ichihara, M. A. L. Leite, A. Deshpande, Y. Tomita, Jan Rak, Sergey Fokin, M. L. Brooks, Rushan Han, K. Okada, E. P. Hartouni, R. Lacey, N. Means, J. Asai, B. Sahlmueller, A. Churyn, D. Jouan, Debashish Pal, C. Pinkenburg, R. Granier de Cassagnac, A. Adare, J. E. Frantz, H. En'yo, M. J. Leitch, Steven E. Skutnik, R. Pak, N. Kamihara, S. Sawada, Y. Watanabe, J. S. Kapustinsky, M. Stepanov, G. Roche, A. Yu. Semenov, V. Babintsev, I. Younus, Shingo Sakai, T. L. Thomas, R. Armendariz, J. Ying, A. Franz, H. Qu, Kazuyoshi Kurita, A. Soldatov, J. Gosset, Matthew G. Reuter, A. Drees, Takahiro Fusayasu, J. Kubart, Ryugo S. Hayano, Hideki Hamagaki, K. Aoki, G. David, Y. Riabov, Kenta Shigaki, S. Yokkaichi, M. Nguyen, A. S. Nyanin, Rachid Nouicer, Alexander Malakhov, C. M. Camacho, Prashant Shukla, S. F. Pate, D. Silvermyr, H. Al-Bataineh, L. S. Zolin, W. J. Park, V. Papavassiliou, Sébastien Gadrat, P. D. Barnes, A. Yanovich, S. N. White, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, P. A. Rukoyatkin, B. Meredith, John Hill, Toru Sugitate, L. D. Isenhower, François Fleuret, Hiroaki Ohnishi, K. B. Lee, D. Roach, K. M. Kijima, Xingguo Li, M. Gonin, A. Sukhanov, H. Pereira, Y. Morino, D. E. Fields, B. V. Jacak, M. B. Deaton, Y. Tanaka, M. McCumber, A. Hadj Henni, S. P. Sorensen, Dylan Walker, Beomkyu Kim, K. Boyle, Seong H. Kim, Wei Xie, J. G. Lajoie, T. Hachiya, N. N. Ajitanand, L. Baksay, I. J. Choi, A. Kravitz, Takahiro Nakamura, Charles Maguire, Susumu Oda, A. Durum, Catherine Micaela Silvestre, K. Yamaura, Kiyoshi Tanida, E. Kistenev, H. Harada, H. Pei, M. I. Nagy, M. Issah, M. D. Malik, E. Vznuzdaev, L. Aphecetche, Johannes Peter Wessels, and Mate Csanad
Subjects: Elastic scattering, Physics, Nuclear and High Energy Physics, Photon, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, Compton scattering, Elementary particle, 7. Clean energy, 01 natural sciences, Gluon, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: Correlations of charged hadrons of 1< p(T) < 10 Gev/c with high pT direct photons and pi(0) mesons in the range 5< p(T) < 15 Gev/c are used to study jet fragmentation in the gamma + jet and dijet channels, respectively. The magnitude of the partonic transverse momentum, k(T), is obtained by comparing to a model incorporating a Gaussian kT smearing. The sensitivity of the associated charged hadron spectra to the underlying fragmentation function is tested and the data are compared to calculations using recent global fit results. The shape of the direct photon-associated hadron spectrum as well as its charge asymmetry are found to be consistent with a sample dominated by quark-gluon Compton scattering. No significant evidence of fragmentation photon correlated production is observed within experimental uncertainties.
Published: 2010

16. Azimuthal Anisotropy ofπ0Production inAu+AuCollisions atsNN=200 GeV: Path-Length Dependence of Jet Quenching and the Role of Initial Geometry

Author: L. Tomášek, V. S. Pantuev, T. Horaguchi, Charles Maguire, Kiyoshi Tanida, E. Kistenev, K. Okada, B. Sahlmueller, H. En'yo, M. J. Leitch, Y. Tanaka, K. A. Drees, S. Hegyi, L. Baksay, B. Love, J. P. Wood, K. Das, E. P. Hartouni, A. G. Litvinenko, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, O. Drapier, Frank Ellinghaus, M. Issah, T. Kempel, Dong-Hun Kim, E. R. Kinney, B. Azmoun, A. Král, F. Matathias, Kensuke Homma, E. Richardson, Maya Hachiya Shimomura, K. Watanabe, D. P. Morrison, S. Campbell, Y. I. Makdisi, S. Bathe, Y. J. Kwon, Agneta Oskarsson, R. A. Soltz, S. Afanasiev, K. Shoji, A. Kozlov, Tatsuya Chujo, P. Constantin, R. Seto, M. Grosse Perdekamp, Y. Berdnikov, M. E. Connors, Y. Akiba, M. Ouchida, M. Mishra, S. Nagamiya, P. W. Stankus, M. J. Tannenbaum, N. Means, D. Kotchetkov, J. Newby, H. Torii, K. I. Hahn, B. Bassalleck, M. Oka, S. Dairaku, A. Deshpande, Vaclav Vrba, Klaus Johannes Reygers, D. Hornback, Rui Wei, Peter Christiansen, T. L. Thomas, M. Rosati, M. Heffner, Alice Mignerey, A. Dion, Taku Gunji, H. Gong, I. Danchev, J. Seele, J. Jin, D. Winter, D. Yu Peressounko, M. Konno, Ryugo S. Hayano, P. Tarján, E. M. Takagui, A. Taranenko, F. Kajihara, Y. Riabov, M. Virius, Kenta Shigaki, Kazushi Miki, Takao Sakaguchi, Brajesh K. Singh, M. Nguyen, Atsushi Taketani, A. S. Nyanin, K. N. Barish, A. D. Frawley, Rachid Nouicer, A. A. Vinogradov, C. H. Chen, Y. Watanabe, Y. Ikeda, A. Enokizono, P. Liebing, S. Huang, H. Qu, Senta Greene, C. L. Woody, A. Berdnikov, S. Tarafdar, S. Butsyk, E. J. Mannel, R. Pak, W. Holzmann, Jiangyong Jia, Y. Goto, A. Glenn, A. T. Basye, I. Younus, R. S. Towell, S. Zhou, I. Garishvili, Hideki Hamagaki, K. Aoki, F. Wei, B. Fadem, E. O'Brien, Eva Haslum, B. Lenzi, G. David, N. Kamihara, S. Sano, Kyeongpil Lee, I. V. Sourikova, S. D. Rolnick, J. Ide, C. Pinkenburg, D. Kawall, C. Y. Chi, Ajit Kumar Mohanty, T. A. Shibata, Kazuyoshi Kurita, G. Roche, T. Sato, C. Baumann, S. Kametani, H. Themann, T. Ichihara, C. P. Singh, B. M. Johnson, M. L. Brooks, A. Drees, Jongmin Lee, O. Dietzsch, M. Proissl, A. Isupov, J. Sziklai, E. T. Atomssa, H. Valle, Marisilvia Donadelli, V. Bumazhnov, D. Lynch, X. He, Andry Malala Rakotozafindrabe, Brian Cole, J. Murata, Takahiro Fusayasu, Dipanwita Dutta, M. Gonin, D. S. Jumper, Y. Aramaki, V. Peresedov, T. Dahms, R. Tanabe, Alexander Malakhov, Gerd Joachim Kunde, J. Koster, Julia Velkovska, D. Silvermyr, I. Shein, A. Yu. Semenov, A. Sukhanov, Rushan Han, H. Masui, L. S. Zolin, H. Pereira, Vladimir Samsonov, Y. Morino, W. J. Park, Christopher Rosen, A. A. Bickley, K. Sedgwick, I. Ravinovich, Tamas Ferenc Csorgo, A. Yanovich, M. Bai, J. L. Nagle, S. Yokkaichi, K. B. Lee, S. N. White, A. K. Purwar, K. Fujiwara, Zhiying You, Y. J. Mao, R. Bennett, M. Kawashima, Y. L. Yamaguchi, M. Finger, J. H. Kang, Zvi Hirsh Citron, J. S. Haggerty, Mate Csanad, Hongfang Liu, D. E. Fields, K. Nakano, B. V. Jacak, W. E. Sondheim, E. Leitner, M. Naglis, D. Ivanischev, D. Roach, K. M. Kijima, C. L. Silva, P. A. Rukoyatkin, Y. Onuki, Y. S. Lai, M. McCumber, H. W. Van Hecke, B. Meredith, Xingguo Li, S. P. Sorensen, M. Chiu, A. Kiss, Masayasu Ishihara, John Hill, Henner Buesching, Steve Edwards, Toru Sugitate, Jan Rak, R. Lacey, O. Chvala, Seong H. Kim, J. Hanks, Sung Keun Park, N. N. Ajitanand, J. T. Mitchell, C. A. Ogilvie, Kisung Lee, T. K. Hemmick, Yasuo Miake, R. Seidl, J. G. Lajoie, Marcus Hohlmann, I. J. Choi, A. Kravitz, François Fleuret, R. P. Pisani, Takahiro Nakamura, L. Kochenda, Vladislav Manko, L. A. Linden Levy, M. Slunečka, R. Granier de Cassagnac, Susumu Oda, K. Sakashita, A. Durum, Y. Fukao, A. Adare, S. Belikov, Catherine Micaela Silvestre, K. Yamaura, Jason Kamin, T. Hester, S. P. Stoll, Martin Purschke, S. Sawada, C. Vale, J. Ying, S. S.E. Rosendahl, G. Bunce, A. Franz, N. A. Sparks, Christine Angela Aidala, Y. Nakamiya, D. Jouan, A. Morreale, Z. Fraenkel, R. K. Choudhury, G. Baksay, K. S. Joo, N. Grau, M. Wysocki, D. Sharma, R. Ichimiya, K. S. Sim, Motoi Inaba, R. M. Wright, C. M. Camacho, Prashant Shukla, S. F. Pate, Y. J. Kim, H. Al-Bataineh, V. Papavassiliou, R. Yang, K. Imai, K. Karatsu, Anne Marie Sickles, G. R. Young, B. Komkov, Norio Saito, Minghui Liu, M. A. L. Leite, Kenneth Francis Read, R. Belmont, J. S. Kapustinsky, A. V. Kazantsev, V. Babintsev, G. S. Kyle, James Alexander, R. Averbeck, Byung-Sik Hong, P. Mikeš, A. Bazilevsky, Philippe Rosnet, Alexandre Lebedev, D. M. Lee, K. Kiriluk, E. H. Kim, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, Tadaaki Isobe, P. L. McGaughey, Jen-Chieh Peng, R. Vértesi, Inkyu Park, J. E. Frantz, Xiong Wang, Alexei Khanzadeev, E. Stenlund, Dong Jo Kim, J. Hamblen, J. M. Durham, T. V. Moukhanova, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, J. Park, A. Veicht, Y. Tsuchimoto, I. Tserruya, Yu. Efremenko, I. E. Yushmanov, V. Singh, H. A. Gustafsson, Johannes Peter Wessels, C. Zhang, Eunja Kim, Beomkyu Kim, K. Boyle, Wei Xie, M. I. Nagy, D. Watanabe, M. D. Malik, E. Vznuzdaev, P. Ružička, Viktor Riabov, S. Esumi, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, D. Isenhower, A. Toia, Sergey Fokin, M. Kurosawa, P. Chung, A. Datta, and H. Pei
Subjects: Physics, Quantum chromodynamics, 010308 nuclear & particles physics, Elliptic flow, Hadron, General Physics and Astronomy, Perturbative QCD, Elementary particle, 01 natural sciences, Gluon, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Anisotropy, Jet quenching
Abstract: We have measured the azimuthal anisotropy of pi(0) production for 1 < p(T) < 18 GeV/c for Au + Au collisions at root s(NN) = 200 GeV. The observed anisotropy shows a gradual decrease for 3 less than or similar to p(T) less than or similar to 7-10 GeV/c, but remains positive beyond 10 GeV/c. The magnitude of this anisotropy is underpredicted, up to at least similar to 10 GeV/c, by current perturbative QCD (PQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and fluctuations is insufficient to account for this discrepancy. Calculations that implement a path-length dependence steeper than what is implied by current PQCD energy-loss models show reasonable agreement with the data.
Published: 2010

17. Elliptic and Hexadecapole Flow of Charged Hadrons inAu+AuCollisions atsNN=200 GeV

Author: D. Sharma, R. Ichimiya, B. Azmoun, A. Král, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, P. Liebing, Martin Purschke, Mate Csanad, A. Morreale, Z. Fraenkel, C. M. Camacho, M. Rosati, R. K. Choudhury, K. Karatsu, S. Dairaku, E. H. Kim, Alice Mignerey, Y. Nakamiya, Sung Keun Park, Prashant Shukla, L. Tomášek, V. S. Pantuev, R. A. Soltz, S. F. Pate, Marisilvia Donadelli, M. Gonin, Anne Marie Sickles, V. Bumazhnov, Y. J. Mao, B. Meredith, N. N. Ajitanand, S. Esumi, H. Al-Bataineh, R. Pak, M. Grosse Perdekamp, M. E. Connors, E. J. Desmond, A. A. Vinogradov, Minghui Liu, A. Sukhanov, H. Pereira, S. Tarafdar, Y. Tanaka, W. A. Zajc, Andry Malala Rakotozafindrabe, G. Baksay, M. Togawa, E. Vazquez-Zambrano, N. Kamihara, G. R. Young, S. Bathe, H. Qu, K. A. Drees, V. Baublis, A. Denisov, Takao Sakaguchi, R. P. Pisani, V. Cianciolo, K. Okada, Y. Morino, Jiangyong Jia, Y. Goto, Kenneth Francis Read, S. Hegyi, Eva Haslum, B. Lenzi, B. Sahlmueller, H. En'yo, J. H. Kang, John Hill, V. Papavassiliou, K. N. Barish, M. Virius, Y. J. Kim, Agneta Oskarsson, M. J. Leitch, J. Park, Y. Onuki, J. S. Haggerty, Sergey Fokin, Hideki Hamagaki, K. Aoki, R. Tanabe, Kazuyoshi Kurita, K. Tanida, S. Afanasiev, G. David, J. T. Mitchell, A. D. Frawley, Jan Rak, Takahiro Nakamura, Peter Christiansen, A. Drees, M. Kurosawa, Y. Fukao, R. Seidl, Tadaaki Isobe, B. Komkov, R. Lacey, J. Newby, D. Winter, L. Baksay, D. Yu Peressounko, Y. J. Kwon, T. Hester, Y. Berdnikov, Y. Akiba, Toru Sugitate, R. Granier de Cassagnac, A. Adare, Vladislav Manko, M. Slunečka, Y. Tsuchimoto, P. Tarján, Johannes Peter Wessels, M. Ouchida, S. P. Sorensen, Charles Maguire, S. Huang, C. H. Chen, M. Mishra, Norio Saito, S. Nagamiya, N. A. Sparks, K. Sakashita, H. A. Gustafsson, S. Belikov, P. L. McGaughey, N. Means, M. A. L. Leite, P. Chung, K. Das, M. Wysocki, E. P. Hartouni, Susumu Oda, D. Hornback, D. Kotchetkov, O. Chvala, C. Zhang, M. Heffner, I. E. Yushmanov, S. Sano, W. Holzmann, Vaclav Vrba, Klaus Johannes Reygers, A. Durum, Maya Hachiya Shimomura, Seong H. Kim, M. Issah, N. Grau, Jason Kamin, A. Glenn, E. Kistenev, P. Ružička, K. S. Sim, C. Vale, A. Taranenko, T. Kempel, Dong-Hun Kim, Rui Wei, Senta Greene, Alexei Khanzadeev, Y. I. Makdisi, J. G. Lajoie, Beomkyu Kim, K. Boyle, Christine Angela Aidala, S. P. Stoll, I. Ravinovich, Kazushi Miki, A. V. Kazantsev, Catherine Micaela Silvestre, A. Datta, E. Stenlund, Rushan Han, A. T. Basye, Wei Xie, Motoi Inaba, Brajesh K. Singh, K. Yamaura, R. M. Wright, Viktor Riabov, R. Belmont, J. S. Kapustinsky, S. Sawada, V. Babintsev, H. Pei, A. K. Purwar, B. Fadem, K. Fujiwara, E. O'Brien, Vladimir Samsonov, I. J. Choi, A. Kravitz, S. S.E. Rosendahl, G. Bunce, M. Bai, O. Dietzsch, J. Ying, A. Franz, P. Mikeš, G. S. Kyle, T. Horaguchi, C. L. Woody, A. Berdnikov, K. B. Lee, F. Matathias, François Fleuret, Y. S. Lai, K. Watanabe, M. Proissl, E. T. Atomssa, H. Valle, A. Yu. Semenov, Kensuke Homma, E. Richardson, Y. L. Yamaguchi, Ajit Kumar Mohanty, James Alexander, T. A. Shibata, M. J. Tannenbaum, Dipanwita Dutta, P. Constantin, H. Torii, K. Shoji, T. Sato, R. Averbeck, Byung-Sik Hong, K. I. Hahn, A. Bazilevsky, E. Leitner, Hongfang Liu, D. Jouan, D. E. Fields, T. C. Awes, Kyoichiro Ozawa, T. Liška, B. Bassalleck, Julia Velkovska, B. V. Jacak, D. Roach, Philippe Rosnet, J. S. Bok, M. Chiu, M. Konno, J. Hamblen, P. W. Stankus, J. M. Durham, Tamas Ferenc Csorgo, K. M. Kijima, S. N. White, Alexandre Lebedev, C. A. Ogilvie, M. McCumber, D. M. Lee, Zhiying You, M. I. Nagy, R. Bennett, T. K. Hemmick, H. W. Van Hecke, I. V. Sourikova, J. L. Nagle, M. Kawashima, T. L. Thomas, D. Isenhower, A. Toia, D. Watanabe, K. Kiriluk, Yasuo Miake, M. D. Malik, S. Yokkaichi, Xingguo Li, T. V. Moukhanova, E. Vznuzdaev, M. Finger, L. Kochenda, M. L. Brooks, Y. Ikeda, Ryugo S. Hayano, Jongmin Lee, E. J. Mannel, Y. Riabov, A. Kiss, R. Vértesi, J. Hanks, Kenta Shigaki, M. Nguyen, D. Lynch, C. Pinkenburg, Zvi Hirsh Citron, Henner Buesching, Taku Gunji, H. Gong, J. Seele, Steve Edwards, A. S. Nyanin, G. Roche, F. Kajihara, Rachid Nouicer, D. S. Jumper, K. S. Lee, T. Dahms, K. Nakano, X. He, Marcus Hohlmann, L. A. Linden Levy, S. Butsyk, Y. Aramaki, V. Peresedov, W. E. Sondheim, S. Zhou, D. Ivanischev, S. D. Rolnick, J. Koster, J. E. Frantz, H. Masui, A. A. Bickley, B. Love, P. A. Rukoyatkin, T. Ichihara, A. G. Litvinenko, Takahiro Fusayasu, Alexander Malakhov, A. Kozlov, R. Seto, D. Silvermyr, L. S. Zolin, W. J. Park, Christopher Rosen, I. Danchev, A. Yanovich, R. S. Towell, I. Garishvili, F. Wei, Kyeongpil Lee, J. Ide, C. Y. Chi, C. Baumann, S. Kametani, C. P. Singh, B. M. Johnson, A. Isupov, J. Sziklai, Brian Cole, J. Jin, E. M. Takagui, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, A. Deshpande, Y. Watanabe, I. Younus, Jen-Chieh Peng, M. Naglis, C. L. Silva, Masayasu Ishihara, Inkyu Park, Xiong Wang, Dong Jo Kim, A. Veicht, I. Tserruya, Yu. Efremenko, V. Singh, R. Yang, K. Imai, Eunja Kim, J. P. Wood, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, Tatsuya Chujo, and K. S. Joo
Subjects: Physics, Nuclear reaction, 010308 nuclear & particles physics, Elliptic flow, Hadron, General Physics and Astronomy, Elementary particle, Fermion, 01 natural sciences, Charged particle, Nuclear physics, Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: Differential measurements of the elliptic (upsilon(2)) and hexadecapole (upsilon(4)) Fourier flow coefficients are reported for charged hadrons as a function of transverse momentum (p(T)) and collision centrality or number of participant nucleons (N-part) for Au + Au collisions at root s(NN) = 200 GeV/ The upsilon(2,4) measurements at pseudorapidity vertical bar eta vertical bar
Published: 2010

18. Transverse momentum dependence ofηmeson suppression in Au+Au collisions atsNN=200GeV

Author: J. H. Kang, Vladimir Samsonov, J. S. Haggerty, S. Afanasiev, A. Ster, S. Sano, J. Newby, Tamas Ferenc Csorgo, M. Gonin, T. L. Thomas, J. L. Nagle, Marisilvia Donadelli, V. Bumazhnov, Andry Malala Rakotozafindrabe, R. Tanabe, D. Layton, W. C. Chang, Rushan Han, R. A. Soltz, H. Borel, D. Hornback, S. Dairaku, Ryugo S. Hayano, A. Deshpande, O. Dietzsch, M. Proissl, Y. Riabov, A. Sukhanov, K. Shoji, Y. S. Lai, M. Heffner, A. Taranenko, E. T. Atomssa, H. Valle, Kenta Shigaki, B. Komkov, K. N. Barish, H. Pereira, Y. Morino, O. Zaudtke, B. Meredith, K. S. Joo, Y. Nakamiya, M. Nguyen, Dipanwita Dutta, P. W. Stankus, M. Grosse Perdekamp, Y. Watanabe, S. Belikov, Kazushi Miki, T. Horaguchi, Z. Fraenkel, Norio Saito, M. A. L. Leite, A. Yu. Semenov, Hongfang Liu, R. Vértesi, Julia Velkovska, M. I. Nagy, J. Gosset, D. Watanabe, G. Baksay, A. S. Nyanin, Maya Hachiya Shimomura, M. Virius, M. E. Connors, B. V. Jacak, M. L. Brooks, Minghui Liu, Brajesh K. Singh, Y. Fukao, K. Karatsu, John Hill, I. Younus, Y. I. Makdisi, B. Love, Rachid Nouicer, M. D. Malik, E. Vznuzdaev, R. S. Towell, D. E. Fields, Y. J. Kim, J. T. Mitchell, M. Rosati, A. G. Litvinenko, Anne Marie Sickles, D. Kotchetkov, S. P. Sorensen, C. A. Ogilvie, M. McCumber, D. Sharma, R. Ichimiya, K. O. Eyser, A. K. Purwar, K. Fujiwara, Tae-Yeon Lee, R. Seidl, T. K. Hemmick, A. Kozlov, R. Seto, K. Haruna, Kenneth Francis Read, A. Soldatov, T. Hester, L. Tomášek, R. Belmont, J. S. Kapustinsky, V. Babintsev, C. Zhang, A. A. Vinogradov, A. V. Kazantsev, Yasuo Miake, Y. Tanaka, C. A. Rosen, I. Garishvili, F. Wei, N. A. Sparks, E. H. Kim, Martin Purschke, Kyeongpil Lee, Vladislav Manko, H. Qu, Jen-Chieh Peng, C. H. Chen, M. Slunečka, Toru Sugitate, G. R. Young, S. Tarafdar, I. Danchev, Hideki Hamagaki, K. Aoki, V. S. Pantuev, L. Aphecetche, A. Glenn, M. J. Tannenbaum, S. Yokkaichi, X. He, K. A. Drees, O. Chvala, Seong H. Kim, J. Ide, C. Y. Chi, Inkyu Park, J. Hanks, Xiong Wang, Peter Christiansen, Jiangyong Jia, Y. Goto, D. Winter, L. Kochenda, Y. Onuki, S. Hegyi, G. David, J. E. Frantz, M. Ouchida, N. Means, D. Yu Peressounko, E. Leitner, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Jan Rak, K. Watanabe, J. Asai, Dong Jo Kim, P. Ružička, H. Torii, M. Naglis, C. L. Silva, R. Lacey, Sung Keun Park, J. G. Lajoie, Yorito Yamaguchi, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, P. Mikeš, Y. Aramaki, V. Peresedov, Eva Haslum, B. Lenzi, R. Pak, P. Tarján, R. Granier de Cassagnac, A. Adare, D. Mukhopadhyay, A. Morreale, Johannes Peter Wessels, S. Rembeczki, Jongmin Lee, C. Pinkenburg, L. Baksay, N. N. Ajitanand, Viktor Riabov, V-N. Tram, N. Grau, N. Kamihara, S. Sawada, J. Ying, A. Franz, M. Issah, J. Koster, S. Batsouli, H. Masui, A. K. Dubey, F. Matathias, Shingo Sakai, I. J. Choi, A. Kravitz, A. Veicht, E. J. Desmond, K. Tanida, Eun Joo Kim, M. Stepanov, G. Roche, Masayasu Ishihara, H. Pei, D. Lynch, Kensuke Homma, Kazuyoshi Kurita, E. Richardson, H. W. Van Hecke, A. A. Bickley, K. Okada, R. K. Choudhury, A. Hadj Henni, B. Sahlmueller, I. Tserruya, B. Azmoun, Yu. Efremenko, A. Král, M. J. Kweon, Takahiro Nakamura, A. Drees, K. B. Lee, P. Constantin, S. Chernichenko, J. Jin, E. M. Takagui, G. S. Kyle, C. L. Woody, A. Berdnikov, T. Kempel, Dong-Hun Kim, V. Singh, H. En'yo, S. Esumi, M. Togawa, M. J. Leitch, K. I. Hahn, K. S. Sim, C. Baumann, S. Kametani, E. Vazquez-Zambrano, F. Staley, D. Kawall, Motoi Inaba, Beomkyu Kim, K. Boyle, James Alexander, J. Park, B. Bassalleck, D. S. Jumper, Alice Mignerey, C. P. Singh, K. Sakashita, K. S. Lee, C. M. Camacho, V. Dzhordzhadze, H. Å Gustafsson, Wei Xie, Prashant Shukla, R. M. Wright, Y. Kwon, B. M. Johnson, K. Das, H. Themann, Susumu Oda, Mate Csanad, M. Konno, A. Kiss, V. L. Rykov, T. Dahms, R. Yang, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, E. P. Hartouni, S. F. Pate, A. Durum, A. Isupov, C. Suire, Henner Buesching, Senta Greene, Jason Kamin, K. Imai, J. Sziklai, W. A. Zajc, François Fleuret, Philippe Rosnet, J. Murata, M. Oka, A. T. Basye, Brian Cole, Steve Edwards, I. Ravinovich, Takao Sakaguchi, Catherine Micaela Silvestre, S. P. Stoll, I. V. Sourikova, T. C. Awes, H. Al-Bataineh, Gerd Joachim Kunde, Alexandre Lebedev, V. Baublis, A. Denisov, Y. Tsuchimoto, Kyoichiro Ozawa, T. Liška, K. Yamaura, Charles Maguire, J. S. Bok, V. Cianciolo, C. Klein-Boesing, B. Fadem, A. Dion, David D'Enterria, S. S.E. Rosendahl, G. Bunce, I. Shein, Y. Tomita, E. O'Brien, J. P. Wood, M. Bai, Sergey Fokin, Marcus Hohlmann, A. D. Frawley, Jun Kikuchi, D. M. Lee, A. Churyn, K. Sedgwick, Alexander Milov, Atsushi Taketani, D. Jouan, A. Enokizono, P. Liebing, I. Nakagawa, R. Luechtenborg, T. Engelmore, R. P. Pisani, E. Kistenev, V. Papavassiliou, S. N. White, O. Drapier, Tadaaki Isobe, L. A. Linden Levy, Frank Ellinghaus, S. Huang, K. Kiriluk, E. R. Kinney, D. P. Morrison, S. Bathe, S. Campbell, I. E. Yushmanov, W. Holzmann, Agneta Oskarsson, V. E. Semenov, D. Roach, Zvi Hirsh Citron, K. M. Kijima, Tatsuya Chujo, Y. Berdnikov, Zhiying You, Y. Akiba, R. Bennett, K. Nakano, M. Mishra, S. Nagamiya, M. Kawashima, W. E. Sondheim, Vaclav Vrba, Klaus Johannes Reygers, Alexei Khanzadeev, P. L. McGaughey, Rui Wei, D. Ivanischev, M. Finger, H. Iinuma, M. Wysocki, A. P.T. Palounek, Xingguo Li, P. A. Rukoyatkin, T. Ichihara, M. Chiu, Takahiro Fusayasu, E. Stenlund, Alexander Malakhov, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, J. Hamblen, J. M. Durham, T. V. Moukhanova, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Butsyk, S. Zhou, A. Baldisseri, S. D. Rolnick, Ajit Kumar Mohanty, T. A. Shibata, T. Sato, D. Isenhower, A. Toia, L. Mašek, T. Niita, J. L. Charvet, M. Kurosawa, P. Chung, J. Imrek, A. Datta, and Y. J. Mao
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Meson, 010308 nuclear & particles physics, Hadron, Elementary particle, 01 natural sciences, 7. Clean energy, Standard deviation, Nuclear physics, Pion, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Boson
Abstract: New measurements by the PHENIX experiment at the Relativistic Heavy Ion Collider for. production at midrapidity as a function of transverse momentum ((PT)) and collision centrality in root s(NN) = 200 GeV Au + Au and p + p collisions are presented. They indicate nuclear modification factors (R-AA) which are similar in both magnitude and trend to those found in earlier pi(0) measurements. Linear fits to R-AA as a function of (PT) in 5-20 GeV/c show that the slope is consistent with zero within two standard deviations at all centralities, although a slow rise cannot be excluded. Having different statistical and systematic uncertainties, the pi(0) and eta measurements are complementary at high (PT); thus, along with the extended (PT) range of these data they can provide additional constraints for theoretical modeling and the extraction of transport properties.
Published: 2010

19. Enhanced Production of Direct Photons inAu+AuCollisions atsNN=200 GeVand Implications for the Initial Temperature

Author: V. Peresedov, Marisilvia Donadelli, S. Y. Fung, H. Kanou, H. Gong, J. Seele, V. Bumazhnov, M. P. Comets, F. Kajihara, K. Hasuko, J. Rak, Hiroyuki Okada, Joakim Nystrand, D. J. Kim, F. Matathias, H. Masui, A. K. Dubey, E. J. Desmond, Eva Haslum, B. Lenzi, Kensuke Homma, S. Afanasiev, A. Ster, J. Newby, Charles Maguire, S. Leckey, A. A. Bickley, D. Hornback, M. Heffner, A. Taranenko, Kazushi Miki, John Hill, S. Zhou, M. Togawa, S. Chernichenko, Anne Marie Sickles, C. P. Singh, A. Deshpande, H. Lim, B. M. Johnson, Josh Moss, B. Bassalleck, A. Baldisseri, J. Park, Florian Bauer, I. Ravinovich, J. Egdemir, A. Isupov, C. Suire, P. Tarján, L. D. Isenhower, Y. S. Kim, B. Love, Y. Nagata, M. Konno, M. Gonin, J. Sziklai, G. R. Young, K. Shigaki, E. Kistenev, Y. Tsuchimoto, J. L. Charvet, François Fleuret, I. Tserruya, Yu. Efremenko, V. Singh, S. S. Ryu, Rushan Han, M. N. Hagiwara, Jason Kamin, S. P. Stoll, W. A. Zajc, V. Baublis, Brian Cole, Y. Watanabe, B. Forestier, D. E. Fields, J. T. Mitchell, Mate Csanad, I. Younus, V. S. Pantuev, T. E. Miller, R. Vértesi, H. Pereira, B. V. Jacak, H. Harada, M. Mitrovski, Y. L. Yamaguchi, A. G. Litvinenko, R. Bennett, A. Denisov, V. Cianciolo, M. Harvey, J. H. Kang, M. Wysocki, Hirohiko Sato, T. Ichihara, S. Butsyk, P. Chung, R. Seidl, Vladislav Manko, S. S.E. Rosendahl, M. Slunečka, M. McCumber, A. K. Purwar, G. Bunce, Vladimir Samsonov, I. Otterlund, Ahmed Al-Jamel, A. Soldatov, Robert F. Hobbs, S. K. Tuli, M. Finger, Junji Tojo, Matthew G. Reuter, M. Holmes, A. Kozlov, Saskia Mioduszewski, Takahiro Fusayasu, J. Chiba, Senta Greene, K. S. Sim, O. Zaudtke, Y. Kwon, M. Naglis, C. L. Silva, R. Seto, K. Haruna, I. D. Ojha, Alexander Malakhov, ShinIchi Esumi, K. Dehmelt, H. Hiejima, B. Komkov, Tamas Ferenc Csorgo, A. Churyn, D. Jouan, K. Okada, B. Sahlmueller, G. C. Mishra, H. Pei, H. En'yo, Jen-Chieh Peng, B. E. Norman, E. O'Brien, P. Constantin, O. Dietzsch, V. Dzhordzhadze, D. Silvermyr, A. Kiss, L. S. Zolin, W. J. Park, Z. Yasin, C. Vale, S. Takagi, J. L. Drachenberg, J. Jin, E. M. Takagui, T. Horaguchi, M. J. Leitch, K. Imai, Xiong Wang, J. L. Nagle, Osamu Jinnouchi, David D'Enterria, S. P. Sorensen, M. Virius, Dylan Walker, Norio Saito, E. T. Atomssa, Christine Angela Aidala, Masayasu Ishihara, Susumu Sato, J. Klay, H. Borel, Tae-Yeon Lee, Martin Purschke, T. Chujo, N. Grau, K. N. Barish, K. Shoji, P. D. Barnes, A. Yanovich, H. Valle, F. Gastineau, S. Kelly, R. S. Towell, M. A. L. Leite, I. Garishvili, Akio Kiyomichi, S. Batsouli, N. N. Ajitanand, W. S. Emam, Takao Sakaguchi, Y. Mao, J. M. Burward-Hoy, B. Chang, M. Chiu, T. A. Shibata, Debashish Pal, S. Sawada, J. Ying, A. Franz, B. Espagnon, Y. Nakamiya, F. Staley, D. Kawall, K. Das, S. Gadrat, Marcus Hohlmann, M. Grosse Perdekamp, N. Kurihara, Alexander Milov, I. Nakagawa, E. P. Hartouni, E. Stenlund, H. Sakata, C. Klein-Boesing, C. A. Ogilvie, T. K. Hemmick, K. Tanida, S. F. Pate, Julia Velkovska, Takahiro Nakamura, O. Drapier, Frank Ellinghaus, A. D. Frawley, R. Lacey, T. Tabaru, P. W. Stankus, E. R. Kinney, S. N. White, D. P. Morrison, V. I. Kochetkov, Y. Cobigo, W. C. Smith, R. Granier de Cassagnac, M. Rosati, J. G. Lajoie, Susumu Oda, M. G. Hur, C. Y. Chi, G. Baksay, T. Hachiya, A. Adare, S. Campbell, D. Kotchetkov, R. P. Pisani, V. E. Semenov, Nikolay Tyurin, P. Rosnet, J. Zimányi, H. Al-Bataineh, J. Murata, L. Kochenda, T. Shohjoh, K. Ozawa, A. Durum, Steven E. Skutnik, S. H. Aronson, S. Bathe, M. K. Lee, I. J. Choi, A. Morreale, V. Babintsev, J. E. Frantz, M. C. McCain, M. T. Bjorndal, Catherine Micaela Silvestre, A. Kravitz, D. Winter, Hiroaki Ohnishi, D. Isenhower, Y. Akiba, K. Nakano, Gerd Joachim Kunde, W. Holzmann, M. N. Wagner, I. Shein, M. Mishra, A. Toia, E. H. Kim, A. A. Vinogradov, Henrik Tydesjö, T. Kawagishi, D. S. Brown, M. L. Brooks, D. Yu Peressounko, S. Nagamiya, Kazuhiro Tanaka, Maya Hachiya Shimomura, Y. Fukao, A. Shevel, Z. Fraenkel, V. Papavassiliou, Vaclav Vrba, A. Rakotozafindrabe, W. E. Sondheim, A. P.T. Palounek, D. Lynch, H. Qu, R. Pak, L. Mašek, Y. Berdnikov, T. V. Moukhanova, Klaus Johannes Reygers, Y. I. Makdisi, A. Oskarsson, Jiangyong Jia, Y. Goto, I. Yushmanov, T. Gunji, Y. Miake, H. Buesching, P. A. Rukoyatkin, N. Kamihara, S. Fokin, J. P. Wessels, K. O. Eyser, K. Fujiwara, T. C. Awes, S. Belikov, K. S. Joo, K. Aoki, A. Glenn, G. David, R. Armendariz, Xiao-yan Li, T. Hester, Xingguo Li, V. L. Rykov, T. Dahms, Kazuyoshi Kurita, H. A. Gustafsson, M. B. Deaton, G. S. Kyle, A. Drees, M. J. Tannenbaum, N. Willis, James Alexander, H. Torii, H. W. Van Hecke, C. R. Cleven, C. Haegemann, Y. Inoue, J. Kubart, R. Soltz, Y. Tanaka, R. Averbeck, M. Inaba, C. Zhang, Byung-Sik Hong, A. Bazilevsky, T. K. Shea, P. J. Kroon, D. Mukhopadhyay, S. Rembeczki, Dong-Hun Kim, D. Bucher, A. Khanzadeev, Alexandre Lebedev, D. Sharma, D. M. Lee, L. Baksay, V-N. Tram, M. Germain, Viktor Riabov, B. Azmoun, A. Král, M. J. Kweon, Y. Le Bornec, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, T. L. Thomas, Ryugo S. Hayano, J. Gosset, J. P. Sullivan, Y. Riabov, S. Yokkaichi, J. M. Heuser, M. Nguyen, H. Delagrange, J. G. Boissevain, Masashi Kaneta, A. S. Nyanin, C. Pinkenburg, M. Stepanov, G. Roche, S. Kametani, J. S. Haggerty, A. Romana, Y. S. Lai, M. Ouchida, J. Asai, Shingo Sakai, C. L. Woody, Minghui Liu, T. Sugitate, Kenneth Francis Read, I. V. Sourikova, Tadaaki Isobe, J. S. Chai, H. Hamagaki, P. L. McGaughey, A. V. Kazantsev, L. Tomášek, P. Mikeš, T. Liška, Jun Kikuchi, L. Aphecetche, M. Issah, M. D. Malik, E. Vznuzdaev, A. Hadj Henni, K. Boyle, Wei Xie, X. He, and O. O. Omiwade
Subjects: Physics, Quantum chromodynamics, Antiparticle, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, Elementary particle, 01 natural sciences, 7. Clean energy, Nuclear physics, Internal conversion, Pair production, Antimatter, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Lepton
Abstract: The production of e(+)e(-) pairs for m(e+e-) < 0.3 GeV/c(2) and 1< p(T) < 5 GeV/c is measured in p + p and Au + Au collisions at root s(NN) = 200 GeV. An enhanced yield above hadronic sources is observed. Treating the excess as photon internal conversions, the invariant yield of direct photons is deduced. In central Au + Au collisions, the excess of the direct photon yield over p + p is exponential in transverse momentum, with an inverse slope T = 221 +/- 19(stat) +/- 19(syst) MeV. Hydrodynamical models with initial temperatures ranging from T-init similar to 300-600 MeV at times of similar to 0.6-0.15 fm/c after the collision are in qualitative agreement with the data. Lattice QCD predicts a phase transition to quark gluon plasma at similar to 170 MeV.
Published: 2010

20. Detailed measurement of thee+e−pair continuum inp+pandAu+Aucollisions atsNN=200GeV and implications for direct photon production

Author: Tae-Yeon Lee, Martin Purschke, F. Gastineau, Tadaaki Isobe, J. S. Chai, C. Silvestre, Anne Marie Sickles, Y. Fukao, A. Shevel, P. L. McGaughey, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, O. Dietzsch, E. T. Atomssa, H. Valle, Julia Velkovska, T. Hester, D. Kotchetkov, A. Kiss, Andry Malala Rakotozafindrabe, G. R. Young, Z. Yasin, Henner Buesching, D. Kawall, K. Tanida, G. S. Kyle, N. Willis, James Alexander, A. Morreale, M. Rosati, A. A. Vinogradov, Henrik Tydesjö, R. Vértesi, Jiangyong Jia, Y. Goto, T. Ichihara, M. Ouchida, R. Averbeck, J. Chiba, Z. Fraenkel, Byung-Sik Hong, J. Asai, Matthew G. Reuter, Takahiro Fusayasu, Marcus Hohlmann, Jan Rak, I. D. Ojha, Alexander Malakhov, P. Tarján, A. Bazilevsky, G. C. Mishra, X. He, Philippe Rosnet, I. Ravinovich, V-N. Tram, Charles Maguire, S. Leckey, J. Gosset, J. M. Burward-Hoy, S. Kelly, J. P. Sullivan, Minghui Liu, R. Lacey, D. Silvermyr, V. I. Kochetkov, Shingo Sakai, R. Granier de Cassagnac, Takao Sakaguchi, Alexandre Lebedev, K. O. Eyser, K. Fujiwara, O. O. Omiwade, C. Klein-Boesing, C. L. Woody, S. Belikov, K. S. Joo, C. P. Singh, R. Pak, A. Adare, Josh Moss, Y. Nagata, L. S. Zolin, N. Kamihara, D. M. Lee, Kenneth Francis Read, A. D. Frawley, B. M. Johnson, V. Peresedov, W. J. Park, T. Tabaru, Y. Nakamiya, E. Kistenev, Motoi Inaba, K. Hasuko, N. N. Ajitanand, J. Murata, R. Armendariz, A. Isupov, C. Suire, W. C. Smith, Rushan Han, M. N. Hagiwara, S. H. Aronson, Kazuyoshi Kurita, P. D. Barnes, A. Yanovich, Hiroyuki Okada, S. S. Ryu, A. V. Kazantsev, I. V. Sourikova, T. L. Thomas, J. Sziklai, M. K. Lee, S. Yokkaichi, G. Baksay, A. Drees, Brian Cole, N. Grau, H. Harada, Alexei Khanzadeev, W. Holzmann, J. M. Heuser, Joakim Nystrand, Eva Haslum, B. Lenzi, J. Kubart, Senta Greene, R. S. Towell, M. T. Bjorndal, Ryugo S. Hayano, S. Butsyk, Y. L. Yamaguchi, Gerd Joachim Kunde, H. W. Van Hecke, Y. Riabov, I. Shein, I. Garishvili, Akio Kiyomichi, L. Aphecetche, D. Sharma, M. B. Deaton, E. Stenlund, Takahiro Nakamura, H. Masui, A. K. Dubey, A. A. Bickley, Vladimir Samsonov, I. Otterlund, Maya Hachiya Shimomura, Mate Csanad, M. Gonin, Kenta Shigaki, S. N. White, H. Sakata, Y. I. Makdisi, P. Mikeš, B. Komkov, M. Nguyen, K. S. Sim, B. Azmoun, K. Shoji, B. Love, B. E. Norman, A. Král, M. J. Kweon, J. G. Boissevain, S. Afanasiev, A. S. Nyanin, N. Kurihara, Rachid Nouicer, Norio Saito, Y. Tanaka, Y. Kwon, M. A. L. Leite, K. Das, A. Ster, H. Hiejima, L. Tomášek, C. A. Ogilvie, Marie Germain, V. S. Pantuev, E. O'Brien, Masashi Kaneta, R. A. Soltz, Y. Le Bornec, J. Newby, Tamas Ferenc Csorgo, T. K. Shea, S. Bathe, E. P. Hartouni, Agneta Oskarsson, P. W. Stankus, T. K. Hemmick, A. G. Litvinenko, M. Harvey, Yasuo Miake, M. G. Hur, C. Y. Chi, Susumu Oda, J. L. Nagle, M. Oka, K. Imai, Alberto Baldisseri, A. Deshpande, Y. Berdnikov, M. Grosse Perdekamp, Y. Akiba, Junji Tojo, M. J. Tannenbaum, T. C. Awes, Kyoichiro Ozawa, T. Liška, Jun Kikuchi, M. Mishra, C. Pinkenburg, F. Matathias, S. Nagamiya, T. Shohjoh, R. Bennett, Kazuhiro Tanaka, Kensuke Homma, A. Dion, F. Staley, L. Baksay, V. Babintsev, L. Kochenda, T. V. Moukhanova, D. Hornback, A. Kozlov, Johannes Peter Wessels, Ahmed Al-Jamel, A. Durum, Vaclav Vrba, Klaus Johannes Reygers, R. Seto, K. Haruna, D. Mukhopadhyay, E. H. Kim, S. Rembeczki, Saskia Mioduszewski, M. Heffner, Atsushi Taketani, T. Kawagishi, A. Enokizono, K. Okada, H. Pereira, B. Sahlmueller, S. Chernichenko, M. Stepanov, G. Roche, E. J. Desmond, M. Finger, Y. J. Mao, S. Kametani, K. Nakano, H. Lim, A. Taranenko, H. En'yo, David D'Enterria, A. Hadj Henni, V. Dzhordzhadze, J. Egdemir, P. Constantin, D. Bucher, M. J. Leitch, B. Bassalleck, M. Togawa, S. Takagi, J. H. Kang, J. S. Haggerty, D. S. Brown, Kazushi Miki, Y. Watanabe, Jason Kamin, J. Jin, J. Park, E. M. Takagui, S. P. Stoll, Xiao-yan Li, J. E. Frantz, M. Konno, D. Winter, D. Yu Peressounko, Florian Bauer, K. Boyle, K. N. Barish, A. Romana, W. E. Sondheim, S. S.E. Rosendahl, G. Bunce, I. Younus, Wei Xie, J. T. Mitchell, C. R. Cleven, R. P. Pisani, Y. Tsuchimoto, A. Churyn, R. Seidl, I. E. Yushmanov, Herve Borel, D. Lynch, Vladislav Manko, A. Soldatov, C. Haegemann, Y. Inoue, M. Slunečka, D. Jouan, M. L. Brooks, Y. S. Lai, A. Glenn, P. A. Rukoyatkin, V. L. Rykov, T. Dahms, M. Naglis, D. E. Fields, C. L. Silva, Nikolay Tyurin, P. J. Kroon, B. V. Jacak, M. N. Wagner, C. Vale, B. S. Chang, Dong-Hun Kim, Christine Angela Aidala, S. Y. Fung, Masayasu Ishihara, J. Klay, J. L. Drachenberg, M. Issah, Susumu Sato, M. D. Malik, E. Vznuzdaev, O. Zaudtke, M. Virius, M. McCumber, A. K. Purwar, S. P. Sorensen, Steven E. Skutnik, Y. Cobigo, John Hill, Dylan Walker, H. A. Torii, H. Qu, Toru Sugitate, S. Esumi, W. A. Zajc, Hideki Hamagaki, K. Aoki, L. D. Isenhower, V. Baublis, J. G. Lajoie, A. Denisov, T. Hachiya, G. David, I. J. Choi, A. Kravitz, Hiroaki Ohnishi, V. Cianciolo, Sergey Fokin, T. Horaguchi, S. Batsouli, M. C. McCain, A. P.T. Palounek, Xingguo Li, François Fleuret, B. Forestier, H. A. Gustafsson, C. Zhang, Viktor Riabov, I. Tserruya, Yu. Efremenko, V. Singh, Hirohiko Sato, S. K. Tuli, Alexander Milov, I. Nakagawa, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, V. E. Semenov, J. Zimányi, Tatsuya Chujo, K. Dehmelt, Jen-Chieh Peng, Xiong Wang, Dong Jo Kim, Osamu Jinnouchi, S. F. Pate, H. Al-Bataineh, H. Kanou, V. Papavassiliou, Taku Gunji, H. Gong, J. Seele, Sébastien Gadrat, Robert F. Hobbs, F. Kajihara, H. Delagrange, Debashish Pal, S. Sawada, J. Ying, A. Franz, B. Espagnon, M. Mitrovski, S. Zhou, M. Wysocki, Y. S. Kim, M. Chiu, T. A. Shibata, D. Isenhower, A. Toia, L. Mašek, J. L. Charvet, T. E. Miller, P. Chung, M. Holmes, W. S. Emam, and H. Pei
Subjects: Physics, Nuclear and High Energy Physics, Antiparticle, Meson, 010308 nuclear & particles physics, Hadron, Elementary particle, Quarkonium, 01 natural sciences, Nuclear physics, Antimatter, 0103 physical sciences, Mass spectrum, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, Lepton
Abstract: PHENIX has measured the e(+)e(-) pair continuum in root s(NN) = 200 GeV Au+Au and p+p collisions over a wide range of mass and transverse momenta. The e(+)e(-) yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate-mass region, between the masses of the phi and the J/psi meson, the yield is consistent with expectations from correlated c (c) over bar production, although other mechanisms are not ruled out. In the low-mass region, below the phi, the p+p inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of 4.7 +/- 0.4(stat) +/- 1.5(syst) +/- 0.9(model). At low mass (m(ee) < 0.3 GeV/c(2)) and high p(T) (1 < p(T) < 5 GeV/c) an enhanced e(+)e(-) pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the p+p is exponential in p(T), with inverse slope T = 221 +/- 19(stat) +/- 19(syst) MeV. Hydrodynamical models with initial temperatures ranging from T-init similar or equal to 300-600 MeV at times of 0.6-0.15 fm/c after the collision are in qualitative agreement with the direct photon data in Au+Au. For low p(T) < 1 GeV/c the low-mass region shows a further significant enhancement that increases with centrality and has an inverse slope of T similar or equal to 100 MeV. Theoretical models underpredict the low-mass, low-p(T) enhancement.
Published: 2010

21. Double-helicity dependence of jet properties from dihadrons in longitudinally polarizedp+pcollisions ats=200 GeV

Author: J. Chiba, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Masashi Kaneta, David D'Enterria, Takao Sakaguchi, C. Klein-Boesing, B. Azmoun, M. B. Deaton, A. Král, M. J. Kweon, C. Pinkenburg, A. D. Frawley, T. Tabaru, A. Kiss, I. Tserruya, Tadaaki Isobe, D. E. Fields, Y. Onuki, Y. Tanaka, Yu. Efremenko, S. Huang, Jan Rak, M. Stepanov, R. Lacey, G. Roche, S. P. Sorensen, Robert F. Hobbs, V. Singh, R. Granier de Cassagnac, S. H. Aronson, A. Adare, M. N. Wagner, Z. Yasin, P. L. McGaughey, B. V. Jacak, W. Holzmann, M. Oka, Dylan Walker, M. Chiu, Henner Buesching, K. A. Drees, Y. J. Mao, A. Dion, K. S. Sim, Y. Nakamiya, V. Dzhordzhadze, S. Kametani, T. Horaguchi, Y. Kwon, R. Yang, H. Hiejima, M. McCumber, Anne Marie Sickles, K. Imai, Seong H. Kim, M. Ouchida, N. Means, J. Asai, Debashish Pal, S. Sawada, J. H. Kang, J. S. Haggerty, G. R. Young, Marcus Hohlmann, F. Staley, L. Baksay, J. G. Lajoie, G. Baksay, A. Romana, Atsushi Taketani, A. Enokizono, P. Liebing, T. Hachiya, J. Ying, A. Franz, A. V. Kazantsev, C. R. Cleven, Ajit Kumar Mohanty, C. Haegemann, Y. Inoue, T. A. Shibata, Alexander Milov, I. Nakagawa, Maya Hachiya Shimomura, Y. I. Makdisi, Shingo Sakai, T. Engelmore, T. Sato, R. A. Soltz, Y. Fukao, Tae-Yeon Lee, A. Shevel, Martin Purschke, C. M. Camacho, Prashant Shukla, L. Tomášek, P. Mikeš, R. Pak, W. A. Zajc, C. Silvestre, T. Hester, T. Kempel, Dong-Hun Kim, O. Drapier, Frank Ellinghaus, E. R. Kinney, I. J. Choi, D. P. Morrison, S. Campbell, A. Kravitz, H. Pei, S. F. Pate, R. Vértesi, N. Kamihara, Marisilvia Donadelli, D. Isenhower, A. Toia, V. E. Semenov, D. Kotchetkov, J. Zimányi, V. Baublis, R. Armendariz, O. Dietzsch, A. Denisov, E. T. Atomssa, H. Valle, Y. S. Lai, V. Bumazhnov, M. P. Comets, Tatsuya Chujo, V. Cianciolo, M. J. Tannenbaum, T. C. Awes, Kyoichiro Ozawa, T. Liška, X. He, O. O. Omiwade, H. Al-Bataineh, Hiroaki Ohnishi, K. B. Lee, A. Yu. Semenov, L. Mašek, A. Morreale, M. Grosse Perdekamp, Andry Malala Rakotozafindrabe, L. Aphecetche, K. O. Eyser, A. K. Purwar, K. Fujiwara, H. Torii, C. L. Woody, A. Berdnikov, J. Gosset, J. T. Mitchell, Y. Tomita, Jun Kikuchi, Kazuyoshi Kurita, A. Drees, V-N. Tram, N. Grau, Dipanwita Dutta, N. N. Ajitanand, T. Niita, D. Mukhopadhyay, Sergey Fokin, S. Rembeczki, K. Dehmelt, R. Tanabe, D. Layton, Z. Fraenkel, Jen-Chieh Peng, R. Seidl, Vladislav Manko, K. Das, Minghui Liu, J. L. Charvet, J. Kubart, J. E. Frantz, V. Papavassiliou, K. Sakashita, Motoi Inaba, V. Peresedov, Julia Velkovska, Sébastien Gadrat, Takahiro Nakamura, M. Slunečka, H. Liu, M. K. Lee, R. K. Choudhury, Xiong Wang, Eva Haslum, Dong Jo Kim, E. P. Hartouni, B. Lenzi, Kenneth Francis Read, T. E. Miller, M. Kurosawa, J. Egdemir, W. C. Chang, Osamu Jinnouchi, Jason Kamin, E. J. Desmond, D. Roach, S. Yokkaichi, K. M. Kijima, S. Belikov, K. Shoji, M. Mitrovski, Susumu Oda, B. Meredith, H. W. Van Hecke, A. Durum, J. Koster, I. V. Sourikova, Charles Maguire, S. Afanasiev, A. Ster, T. L. Thomas, A. Veicht, S. P. Stoll, M. Rosati, Rushan Han, P. Chung, J. Imrek, M. Togawa, J. Park, V. S. Pantuev, S. Butsyk, Vladimir Samsonov, J. Newby, H. A. Gustafsson, M. Wysocki, S. Bathe, Johannes Peter Wessels, Agneta Oskarsson, Ryugo S. Hayano, S. S.E. Rosendahl, G. Bunce, K. Yamaura, E. Kistenev, Xingguo Li, M. Gonin, W. S. Emam, S. Batsouli, H. Kanou, Y. Tsuchimoto, Y. Riabov, Y. Berdnikov, Y. Akiba, P. W. Stankus, M. Mishra, D. Hornback, A. Churyn, Kenta Shigaki, H. Masui, A. K. Dubey, Taku Gunji, H. Gong, J. Seele, M. Nguyen, M. Heffner, D. Jouan, A. A. Vinogradov, C. Zhang, C. Vale, I. E. Yushmanov, Junji Tojo, F. Kajihara, S. Nagamiya, A. Hadj Henni, Alexei Khanzadeev, Tamas Ferenc Csorgo, H. Harada, J. L. Nagle, Vaclav Vrba, Klaus Johannes Reygers, A. S. Nyanin, A. Taranenko, E. Stenlund, B. S. Chang, Kazushi Miki, Rachid Nouicer, H. Delagrange, Jiangyong Jia, Y. Goto, D. Winter, H. Sakata, D. Yu Peressounko, A. A. Bickley, P. Tarján, A. Sukhanov, K. Okada, H. Pereira, Y. Morino, Christine Angela Aidala, J. Klay, Brajesh K. Singh, C. A. Ogilvie, P. Ružička, T. K. Hemmick, B. Sahlmueller, John Hill, H. En'yo, M. J. Leitch, Beomkyu Kim, K. Boyle, S. Zhou, Yasuo Miake, B. Love, Wei Xie, Steven E. Skutnik, T. V. Moukhanova, S. D. Rolnick, L. Kochenda, Viktor Riabov, A. G. Litvinenko, F. Matathias, Toru Sugitate, L. D. Isenhower, Senta Greene, M. I. Nagy, M. Issah, M. D. Malik, E. Vznuzdaev, A. Kozlov, R. Seto, K. Haruna, A. T. Basye, Kensuke Homma, B. E. Norman, B. Fadem, H. Qu, S. Takagi, E. O'Brien, K. N. Barish, P. Constantin, S. Chernichenko, Hideki Hamagaki, K. Aoki, M. L. Brooks, G. David, François Fleuret, B. Bassalleck, H. Iinuma, T. Ichihara, M. Konno, Matthew G. Reuter, Takahiro Fusayasu, A. P.T. Palounek, Alexander Malakhov, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, S. N. White, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, P. A. Rukoyatkin, E. H. Kim, I. Ravinovich, Y. Nagata, Y. L. Yamaguchi, M. Bai, B. Komkov, E. C. Aschenauer, Norio Saito, M. A. L. Leite, R. Bennett, J. S. Kapustinsky, M. Finger, S. Dairaku, V. Babintsev, O. Zaudtke, G. S. Kyle, James Alexander, M. Virius, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Philippe Rosnet, A. Glenn, Alexandre Lebedev, D. M. Lee, Herve Borel, D. Lynch, K. Kiriluk, V. L. Rykov, T. Dahms, K. S. Joo, S. Esumi, D. Sharma, Saskia Mioduszewski, R. Ichimiya, J. Jin, E. M. Takagui, C. Baumann, M. Naglis, C. P. Singh, C. L. Silva, B. M. Johnson, A. Isupov, C. Suire, Masayasu Ishihara, J. Sziklai, Susumu Sato, Brian Cole, R. S. Towell, I. Garishvili, Akio Kiyomichi, F. Wei, A. Deshpande, N. Kurihara, C. Y. Chi, Y. Watanabe, I. Younus, A. Soldatov, D. Kawall, K. Tanida, H. Themann, V. I. Kochetkov, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, Alberto Baldisseri, and Mate Csanad
Subjects: Physics, Nuclear and High Energy Physics, Angular momentum, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Drell–Yan process, 01 natural sciences, Helicity, Baryon, Nuclear physics, Total angular momentum quantum number, 0103 physical sciences, Proton spin crisis, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon, Spin (physics)
Abstract: It has been postulated that partonic orbital angular momentum can lead to a significant double-helicity dependence in the net transverse momentum of Drell-Yan dileptons produced in longitudinally polarized p + p collisions. Analogous effects are also expected for dijet production. If confirmed by experiment, this hypothesis, which is based on semiclassical arguments, could lead to a new approach for studying the contributions of orbital angular momentum to the proton spin. We report the first measurement of the double-helicity dependence of the dijet transverse momentum in longitudinally polarized p + p collisions at root s = 200 GeV from data taken by the PHENIX experiment in 2005 and 2006. The analysis deduces the transverse momentum of the dijet from the widths of the near-and far-side peaks in the azimuthal correlation of the dihadrons. When averaged over the transverse momentum of the triggered particle, the difference of the root mean square of the dijet transverse momentum between like-and unlike-helicity collisions is found to be -37 +/- 88(stat) +/- 14(sys)t MeV/c.
Published: 2010

22. Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions

Author: Alice Mignerey, C. Baumann, J. L. Charvet, Takao Sakaguchi, S. P. Sorensen, C. L. Woody, A. Berdnikov, S. Dairaku, S. Kametani, C. P. Singh, O. Zaudtke, S. N. White, Senta Greene, M. Kurosawa, C. Klein-Boesing, O. Chvala, M. Virius, Y. Onuki, Johannes Peter Wessels, B. M. Johnson, Zvi Hirsh Citron, Y. Tanaka, Seong H. Kim, A. Isupov, C. Suire, A. T. Basye, S. Hegyi, B. Fadem, E. O'Brien, K. Watanabe, K. Shoji, X. He, L. Baksay, A. D. Frawley, C. H. Chen, S. Bathe, Jan Rak, R. Lacey, K. Nakano, J. G. Lajoie, M. Rosati, S. Huang, W. E. Sondheim, Agneta Oskarsson, A. Glenn, I. Ravinovich, D. Ivanischev, J. Sziklai, P. Chung, J. Imrek, B. Komkov, P. W. Stankus, J. T. Mitchell, Y. Berdnikov, Y. Aramaki, V. Peresedov, I. V. Sourikova, I. J. Choi, A. Kravitz, Alexei Khanzadeev, P. A. Rukoyatkin, R. Granier de Cassagnac, A. Adare, H. Pei, Vladimir Samsonov, M. Bai, R. A. Soltz, H. Borel, E. Stenlund, Sung Keun Park, W. A. Zajc, W. Holzmann, Charles Maguire, Brian Cole, T. Ichihara, A. A. Vinogradov, M. Mishra, S. Nagamiya, J. Koster, A. Datta, M. Naglis, Takahiro Fusayasu, V. Baublis, Jiangyong Jia, Y. Goto, C. L. Silva, M. Grosse Perdekamp, M. E. Connors, Tamas Ferenc Csorgo, Kiyoshi Tanida, E. Kistenev, A. Denisov, V. Cianciolo, N. N. Ajitanand, Norio Saito, Y. Tomita, M. A. L. Leite, Maya Hachiya Shimomura, V. S. Pantuev, Zhiying You, R. Seidl, Vladislav Manko, C. A. Ogilvie, M. Slunečka, R. Bennett, S. Batsouli, M. Kawashima, Alexander Malakhov, R. S. Towell, Vaclav Vrba, Klaus Johannes Reygers, Mate Csanad, D. Silvermyr, H. Masui, A. K. Dubey, A. A. Bickley, Kisung Lee, Sergey Fokin, Taku Gunji, H. Gong, J. Seele, M. Finger, T. K. Hemmick, Takahiro Nakamura, M. I. Nagy, M. Gonin, D. Watanabe, J. M. Durham, Yasuo Miake, I. Tserruya, Yu. Efremenko, V. Singh, B. Love, J. L. Nagle, J. Hamblen, M. D. Malik, Y. I. Makdisi, Jongmin Lee, Masayasu Ishihara, E. Vznuzdaev, I. Garishvili, F. Wei, L. Kochenda, M. Issah, Laurent Bernard Aphecetche, Kyeongpil Lee, J. Ide, A. Sukhanov, F. Kajihara, Rui Wei, Peter Christiansen, D. Winter, D. Yu Peressounko, S. Belikov, Emily D. Richardson, H. Pereira, Susumu Oda, A. Durum, R. Belmont, J. S. Kapustinsky, Anne Marie Sickles, A. G. Litvinenko, F. Staley, L. S. Zolin, W. J. Park, Christopher Rosen, P. D. Barnes, A. Yanovich, A. Kozlov, S. Butsyk, M. Ouchida, N. Means, J. Asai, G. R. Young, Marisilvia Donadelli, V. Bumazhnov, V. Babintsev, T. V. Moukhanova, Y. Morino, T. Kempel, Dong-Hun Kim, D. Kawall, H. Themann, K. Okada, M. J. Tannenbaum, D. Lynch, D. S. Jumper, K. A. Drees, C. Vale, H. A. Gustafsson, A. Hadj Henni, G. S. Kyle, K. Sakashita, R. Vértesi, V. L. Rykov, T. Dahms, Catherine Micaela Silvestre, K. Yamaura, O. Dietzsch, E. T. Atomssa, H. Valle, H. Torii, R. Seto, K. Haruna, B. Meredith, John Hill, C. Zhang, Shingo Sakai, S. Zhou, Andry Malala Rakotozafindrabe, B. S. Chang, Christine Angela Aidala, J. Klay, K. S. Joo, B. Sahlmueller, Beomkyu Kim, K. Boyle, H. En'yo, J. Murata, Y. Nakamiya, Y. J. Mao, Minghui Liu, Wei Xie, James Alexander, C. Y. Chi, Yasutada Akiba, Dipanwita Dutta, D. Mukhopadhyay, P. Ružička, A. Baldisseri, I. Danchev, R. Tanabe, Toru Sugitate, S. D. Rolnick, D. Layton, M. J. Leitch, K. B. Lee, S. Rembeczki, Jason Kamin, A. Kiss, Henner Buesching, R. Averbeck, Gerd Joachim Kunde, Byung-Sik Hong, K. N. Barish, Julia Velkovska, David D'Enterria, T. L. Thomas, A. Bazilevsky, G. Baksay, I. Shein, Hongfang Liu, D. E. Fields, S. P. Stoll, Viktor Riabov, J. H. Kang, Jason Newby, W. C. Chang, M. Heffner, Ajit Kumar Mohanty, Kenneth Francis Read, J. E. Frantz, T. A. Shibata, Steve Edwards, R. P. Pisani, S. S.E. Rosendahl, K. Sedgwick, S. Sano, T. Sato, Ryugo S. Hayano, François Fleuret, Alexandre Lebedev, B. V. Jacak, D. M. Lee, K. Das, Rushan Han, K. S. Sim, V. Dzhordzhadze, G. Bunce, Marcus Hohlmann, D. Roach, K. M. Kijima, Y. Kwon, J. S. Haggerty, A. V. Kazantsev, A. Deshpande, Y. Riabov, S. Esumi, E. P. Hartouni, L. A. Linden Levy, Eunja Kim, M. L. Brooks, A. Churyn, J. P. Wood, E. J. Desmond, J. Jin, Y. Fukao, Kenta Shigaki, D. Isenhower, M. McCumber, A. Toia, L. Mašek, M. Nguyen, Y. J. Kim, K. Kiriluk, P. Rosnet, K. O. Eyser, D. Jouan, A. K. Purwar, K. Fujiwara, D. Sharma, R. Yang, H. Iinuma, E. M. Takagui, T. Hester, M. Togawa, A. S. Nyanin, E. Vazquez-Zambrano, J. Park, Xingguo Li, F. Matathias, D. Kotchetkov, Y. L. Yamaguchi, R. Ichimiya, E. H. Kim, R. Pak, L. Tomášek, E. Leitner, Alexander Milov, I. Nakagawa, R. Luechtenborg, Y. Watanabe, A. P.T. Palounek, T. Engelmore, T. Niita, Rachid Nouicer, M. Proissl, Kensuke Homma, N. Kamihara, N. A. Sparks, I. Younus, P. Mikeš, H. Qu, K. Imai, Y. Tsuchimoto, P. Constantin, S. Chernichenko, H. W. Van Hecke, B. Azmoun, Kazuyoshi Kurita, A. Soldatov, J. Hanks, A. Král, M. J. Kweon, K. I. Hahn, O. Drapier, Frank Ellinghaus, B. Bassalleck, V-N. Tram, N. Grau, A. Drees, I. E. Yushmanov, E. R. Kinney, M. Konno, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, Jun Kikuchi, Motoi Inaba, R. M. Wright, Tadaaki Isobe, P. L. McGaughey, M. Chiu, D. P. Morrison, S. Campbell, Y. S. Lai, A. Yu. Semenov, J. Gosset, Hideki Hamagaki, K. Aoki, V. E. Semenov, G. David, Tatsuya Chujo, S. Yokkaichi, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Jen-Chieh Peng, C. Pinkenburg, M. Stepanov, M. Oka, A. Dion, Inkyu Park, Xiong Wang, Dong Jo Kim, Atsushi Taketani, A. Veicht, A. Enokizono, P. Liebing, Tae-Yeon Lee, Martin Purschke, S. Afanasiev, A. Ster, G. Roche, A. Morreale, D. Hornback, Z. Fraenkel, A. Taranenko, Kazushi Miki, T. Horaguchi, Brajesh K. Singh, R. K. Choudhury, S. Tarafdar, Eva Haslum, B. Lenzi, C. M. Camacho, Prashant Shukla, S. F. Pate, H. Al-Bataineh, V. Papavassiliou, S. Sawada, J. Ying, A. Franz, M. Wysocki, P. Tarján, Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), PHENIX, Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Energy loss, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, FOS: Physical sciences, Parton, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Azimuth, Yield (chemistry), 0103 physical sciences, Heavy ion, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract: Fast parton probes produced by hard scattering and embedded within collisions of large nuclei have shown that partons suffer large energy loss and that the produced medium may respond collectively to the lost energy. We present measurements of neutral pion trigger particles at transverse momenta p^t_T = 4-12 GeV/c and associated charged hadrons (p^a_T = 0.5-7 GeV/c) as a function of relative azimuthal angle Delta Phi at midrapidity in Au+Au and p+p collisions at sqrt(s_NN) = 200 GeV. These data lead to two major observations. First, the relative angular distribution of low momentum hadrons, whose shape modification has been interpreted as a medium response to parton energy loss, is found to be modified only for p^t_T < 7 GeV/c. At higher p^t_T, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured p^a_T. This observation presents a quantitative challenge to medium response scenarios. Second, the associated yield of hadrons opposite to the trigger particle in Au+Au relative to that in p+p (I_AA) is found to be suppressed at large momentum (IAA ~ 0.35-0.5), but less than the single particle nuclear modification factor (R_AA ~0.2)., 427 authors, 6 pages text, 3 figures, 1 table. Submitted to Phys. Rev. Lett. v2 has minor changes in response to PRL referee comments. Plain text data tables for the points plotted in figures are publicly available at http://www.phenix.bnl.gov/papers.html
Published: 2010

23. High-pT π0production with respect to the reaction plane inAu+Aucollisions atsNN=200GeV

Author: Youngil Kwon, J. Egdemir, Taku Gunji, F. Kajihara, Tadaaki Isobe, J. S. Chai, S. P. Stoll, H. Delagrange, E. J. Desmond, K. Hasuko, S. S.E. Rosendahl, D. E. Fields, G. Bunce, K. Das, P. L. McGaughey, Hiroyuki Okada, E. P. Hartouni, B. V. Jacak, Y. S. Kim, Joakim Nystrand, M. Togawa, Eva Haslum, J. Park, Florian Bauer, C. A. Ogilvie, T. K. Hemmick, Yasuo Miake, L. Kochenda, A. K. Purwar, D. Jouan, T. Kawagishi, G. S. Kyle, A. V. Kazantsev, M. Chiu, T. A. Shibata, N. Willis, James Alexander, C. R. Cleven, R. Averbeck, Byung-Sik Hong, T. Ichihara, Matthew G. Reuter, N. Kamihara, S. Butsyk, Vladimir Samsonov, A. Bazilevsky, S. Afanasiev, F. Matathias, A. Ster, R. Armendariz, S. Takagi, Kazuyoshi Kurita, A. Drees, Philippe Rosnet, I. D. Ojha, D. Isenhower, Alexander Malakhov, P. J. Kroon, J. Newby, V-N. Tram, Alexandre Lebedev, V. S. Pantuev, L. Aphecetche, K. N. Barish, P. Tarján, T. L. Thomas, D. Silvermyr, M. Gonin, L. S. Zolin, Y. Tsuchimoto, S. Kelly, D. M. Lee, Yoichiro Fukao, N. N. Ajitanand, S. Kametani, W. J. Park, Kensuke Homma, M. Rosati, M. Heffner, Ryugo S. Hayano, Tamas Ferenc Csorgo, M. Harvey, T. C. Awes, Kyoichiro Ozawa, Junji Tojo, Motoi Inaba, S. Esumi, J. L. Nagle, Takahiro Nakamura, J. H. Kang, T. E. Miller, A. Taranenko, A. Enokizono, Jen-Chieh Peng, P. D. Barnes, A. Yanovich, N. Grau, K. Shoji, E. H. Kim, Y. Riabov, Kenta Shigaki, I. E. Yushmanov, Maya Hachiya Shimomura, Johannes Peter Wessels, J. S. Haggerty, A. Romana, W. A. Zajc, M. Wysocki, M. Holmes, T. Shohjoh, A. Durum, H. Pereira, S. Y. Fung, M. Nguyen, R. Vértesi, M. L. Brooks, A. S. Nyanin, K. Okada, K. S. Sim, Y. Watanabe, A. Hadj Henni, S. Chernichenko, H. Lim, V. Baublis, John Hill, P. W. Stankus, H. W. Van Hecke, A. Denisov, V. Cianciolo, J. E. Frantz, B. Bassalleck, A. A. Vinogradov, Henrik Tydesjö, D. S. Brown, Minghui Liu, Robert F. Hobbs, B. Sahlmueller, Y. I. Makdisi, Dong Jo Kim, V. Bumazhnov, M. P. Comets, K. Boyle, Sergey Fokin, Anders Nils Erik Oskarsson, H. En'yo, P. Constantin, M. Konno, H. A. Torii, Osamu Jinnouchi, Wei Xie, Marie Germain, Jiangyong Jia, Y. Goto, M. J. Leitch, Toru Sugitate, A. Kiss, Kenneth Francis Read, L. D. Isenhower, T. Horaguchi, Henner Buesching, Senta Greene, A. G. Litvinenko, J. L. Drachenberg, H. Hiejima, B. Komkov, Steven E. Skutnik, Hans-Åke Gustafsson, Martin Purschke, J. M. Burward-Hoy, Debashish Pal, J. Gosset, B. E. Norman, Norio Saito, J. P. Sullivan, S. Sawada, E. O'Brien, Alexander Milov, M. A. L. Leite, A. Franz, R. A. Soltz, A. Kozlov, F. Gastineau, Shingo Sakai, K. Imai, H. Qu, M. N. Hagiwara, Herve Borel, R. Seto, K. Haruna, W. C. Smith, S. Bathe, C. L. Woody, S. P. Sorensen, François Fleuret, M. Issah, O. Drapier, Hideki Hamagaki, K. Aoki, G. David, M. Grosse Perdekamp, M. J. Tannenbaum, B. Forestier, Y. Berdnikov, V. Babintsev, M. D. Malik, B. Espagnon, Y. Akiba, S. Yokkaichi, V. Dzhordzhadze, M. T. Bjorndal, A. Glenn, J. M. Heuser, S. Nagamiya, Kazuhiro Tanaka, E. Vznuzdaev, X. He, E. R. Kinney, Klaus Johannes Reygers, D. P. Morrison, O. O. Omiwade, M. K. Lee, Anne Marie Sickles, S. N. White, S. Campbell, S. F. Pate, O. Dietzsch, V. Peresedov, J. G. Boissevain, Masashi Kaneta, V. L. Rykov, T. Dahms, I. V. Sourikova, H. Valle, C. Zhang, V. E. Semenov, D. Winter, D. Yu Peressounko, Alexei Khanzadeev, Julia Velkovska, X. R. Wang, D. Mukhopadhyay, G. R. Young, J. Zimányi, C. Pinkenburg, J. T. Mitchell, H. Masui, A. K. Dubey, J. G. Lajoie, W. E. Sondheim, D. Kotchetkov, Tatsuya Chujo, T. Hachiya, O. Zaudtke, D. Bucher, P. A. Rukoyatkin, E. Stenlund, Vladislav Manko, I. Tserruya, M. Stepanov, G. Roche, Yu. Efremenko, Jan Rak, R. Lacey, Ingvar Otterlund, R. Granier de Cassagnac, J. Chiba, V. Papavassiliou, Sébastien Gadrat, V. Singh, I. J. Choi, Hiroaki Ohnishi, C. Vale, Viktor Riabov, Christine Angela Aidala, G. C. Mishra, Z. Fraenkel, Takao Sakaguchi, C. Klein-Boesing, Y. Cobigo, I. Ravinovich, A. D. Frawley, T. Tabaru, Y. Nagata, S. Batsouli, S. H. Aronson, W. Holzmann, S. S. Ryu, T. V. Moukhanova, R. Bennett, Hirohiko Sato, S. K. Tuli, Ahmed Al-Jamel, Xingguo Li, B. Azmoun, M. J. Kweon, M. C. McCain, A. P.T. Palounek, Y. Le Bornec, A. Dion, Atsushi Taketani, S. Belikov, K. S. Joo, H. Pei, D. Sharma, Mate Csanad, David D'Enterria, R. P. Pisani, Nikolay Tyurin, M. N. Wagner, Saskia Mioduszewski, J. Jin, E. M. Takagui, C. P. Singh, B. M. Johnson, A. Isupov, C. Suire, J. Sziklai, Brian Cole, Charles Maguire, S. Leckey, R. S. Towell, Josh Moss, Akio Kiyomichi, E. Kistenev, H. Harada, N. Kurihara, M. G. Hur, C. Y. Chi, Y. Tanaka, T. K. Shea, M. Naglis, C. L. Silva, Masayasu Ishihara, F. Staley, Susumu Sato, A. Deshpande, I. Younus, A. Soldatov, K. Tanida, V. I. Kochetkov, J. Murata, Gerd Joachim Kunde, I. Shein, and Alberto Baldisseri
Subjects: Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Plane (geometry), Elliptic flow, Parton, 01 natural sciences, Azimuth, Nuclear physics, Pion, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Jet quenching
Abstract: Measurements of the azimuthal anisotropy of high-p(T) neutral pion (pi(0)) production in Au+Au collisions at s(NN)=200 GeV by the PHENIX experiment are presented. The data included in this article were collected during the 2004 Relativistic Heavy Ion Collider running period and represent approximately an order of magnitude increase in the number of analyzed events relative to previously published results. Azimuthal angle distributions of pi(0) mesons detected in the PHENIX electromagnetic calorimeters are measured relative to the reaction plane determined event-by-event using the forward and backward beam-beam counters. Amplitudes of the second Fourier component (v(2)) of the angular distributions are presented as a function of pi(0) transverse momentum (p(T)) for different bins in collision centrality. Measured reaction plane dependent pi(0) yields are used to determine the azimuthal dependence of the pi(0) suppression as a function of p(T), R-AA(Delta phi,p(T)). A jet-quenching motivated geometric analysis is presented that attempts to simultaneously describe the centrality dependence and reaction plane angle dependence of the pi(0) suppression in terms of the path lengths of hypothetical parent partons in the medium. This set of results allows for a detailed examination of the influence of geometry in the collision region and of the interplay between collective flow and jet-quenching effects along the azimuthal axis.
Published: 2009

24. Systematic studies of elliptic flow measurements inAu+Aucollisions atsNN=200GeV

Author: S. Bathe, Maya Hachiya Shimomura, H. Pei, Y. Berdnikov, Y. I. Makdisi, T. L. Thomas, Y. Akiba, S. Nagamiya, Kazuhiro Tanaka, Ryugo S. Hayano, Klaus Johannes Reygers, M. J. Tannenbaum, J. Egdemir, Y. Riabov, Kenta Shigaki, J. T. Mitchell, M. Nguyen, S. Afanasiev, A. Ster, D. Mukhopadhyay, A. S. Nyanin, Rachid Nouicer, E. J. Desmond, S. P. Stoll, S. Esumi, J. Newby, G. Roche, D. Bucher, Minghui Liu, W. A. Zajc, P. Tarján, Sean A. Kelly, V. Baublis, A. Denisov, M. Togawa, V. Cianciolo, S. Batsouli, Vladislav Manko, M. C. McCain, A. P.T. Palounek, Sergey Fokin, Kenneth Francis Read, J. Park, Florian Bauer, T. Horaguchi, J. Chiba, Alice Mignerey, S. S.E. Rosendahl, G. Bunce, O. Zaudtke, H. Masui, Charles Maguire, S. Leckey, G. C. Mishra, C. L. Woody, A. V. Kazantsev, Hiroaki Ohnishi, Y. Tsuchimoto, C. Zhang, A. Lebedev, X. He, M. Heffner, P. Rosnet, Takao Sakaguchi, M. Wagner, C. Klein-Boesing, Viktor Riabov, I. E. Yushmanov, Steven E. Skutnik, Alexei Khanzadeev, Mate Csanad, D. Jouan, Y. Cobigo, A. Taranenko, Josh Moss, S. Belikov, K. S. Joo, Senta Greene, A. D. Frawley, T. Tabaru, S. H. Aronson, M. Chiu, T. A. Shibata, E. Kistenev, S. Kametani, V. S. Pantuev, I. V. Sourikova, H. Okada, C. Vale, Yoichiro Fukao, H. W. Van Hecke, R. Pak, S. Takagi, K. Das, H. Qu, W. Holzmann, C. P. Singh, T. C. Awes, B. E. Norman, D. E. Fields, N. Kamihara, M. Harvey, B. M. Johnson, Junji Tojo, I. Ravinovich, H. Harada, Christine Angela Aidala, J. S. Haggerty, A. Kiss, Y. Nagata, Kyoichiro Ozawa, A. Hadj Henni, E. O'Brien, B. V. Jacak, E. H. Kim, Hideki Hamagaki, K. Aoki, G. David, F. Matathias, R. Armendariz, Henner Buesching, E. P. Hartouni, D. Isenhower, K. Okada, K. N. Barish, A. Isupov, D. Sharma, S. S. Ryu, R. A. Soltz, Kazuyoshi Kurita, A. Romana, B. Sahlmueller, S. Gadrat, T. V. Moukhanova, K. Hasuko, David D'Enterria, A. Drees, A. K. Purwar, H. En'yo, P. Constantin, J. Sziklai, M. J. Leitch, M. Wysocki, Tadaaki Isobe, R. Bennett, B. Azmoun, M. J. Kweon, Ahmed Al-Jamel, S. Sakai, M. Grosse Perdekamp, R. Vértesi, V. N. Tram, Evert Stenlund, K. Boyle, C. R. Cleven, J. S. Chai, J. M. Burward-Hoy, J. E. Frantz, R. S. Towell, Xingguo Li, Y. Le Bornec, Y. Tanaka, Akio Kiyomichi, R. P. Pisani, Joakim Nystrand, Taku Gunji, Y. J. Kwon, P. L. McGaughey, Herve Borel, Eva Haslum, W. C. Smith, F. Kajihara, T. K. Shea, M. Gonin, P. J. Kroon, Kensuke Homma, A. Glenn, S. Sorensen, S. F. Pate, C. A. Ogilvie, T. K. Hemmick, N. N. Ajitanand, V. L. Rykov, T. Dahms, N. Kurihara, H. Delagrange, M. K. Lee, Nikolay Tyurin, A. Dion, W. Xie, S. Chernichenko, Atsushi Taketani, Yasuo Miake, H. Lim, F. Staley, H. Pereira, B. Bassalleck, O. Dietzsch, Takahiro Nakamura, M. L. Brooks, N. Grau, Martin Purschke, L. Kochenda, J. G. Boissevain, K. Shoji, M. G. Hur, C. Y. Chi, M. Konno, F. Gastineau, B. Komkov, T. Shohjoh, D. Winter, D. Yu Peressounko, V. Papavassiliou, O. O. Omiwade, Robert F. Hobbs, Y. S. Kim, T. Kawagishi, Masashi Kaneta, A. Durum, M. Issah, P. W. Stankus, D. Kotchetkov, H. Valle, J. L. Drachenberg, Hans-Åke Gustafsson, D. S. Brown, Norio Saito, V. Peresedov, M. D. Malik, E. Vznuzdaev, Z. Fraenkel, T. E. Miller, Debashish Pal, S. Sawada, A. Enokizono, Saskia Mioduszewski, M. A. L. Leite, X. R. Wang, B. Forestier, M. T. Bjorndal, A. Franz, Julia Velkovska, M. Holmes, M. Rosati, C. Pinkenburg, L. Aphecetche, J. H. Kang, J. Jin, J. G. Lajoie, T. Hachiya, E. M. Takagui, Johannes Peter Wessels, V. Babintsev, Ingvar Otterlund, I. J. Choi, G. S. Kyle, Bruno Espagnon, A. K. Dubey, A. A. Vinogradov, Henrik Tydesjö, N. Willis, James Alexander, M. Stepanov, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Motoi Inaba, Anders Oskarsson, D. M. Lee, Jiangyong Jia, Y. Goto, J. Gosset, J. P. Sullivan, Marie Germain, A. G. Litvinenko, S. Yokkaichi, J. M. Heuser, A. Kozlov, R. Seto, K. Haruna, B. A. Cole, V. Dzhordzhadze, V. Bumazhnov, M. P. Comets, M. N. Hagiwara, S. Butsyk, Vladimir Samsonov, Tamas Ferenc Csorgo, J. L. Nagle, I. Tserruya, Yu. Efremenko, V. Singh, Hirohiko Sato, S. K. Tuli, Christophe Pierre Suire, Alexander Milov, O. Drapier, E. R. Kinney, D. P. Morrison, S. Campbell, V. E. Semenov, J. Zimányi, Tatsuya Chujo, M. Naglis, Jen-Chieh Peng, C. L. Silva, Dong Jo Kim, Osamu Jinnouchi, Masayasu Ishihara, Susumu Sato, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, K. Tanida, V. I. Kochetkov, D. Silvermyr, J. Murata, Gerd Joachim Kunde, I. Shein, Alberto Baldisseri, Anne Marie Sickles, G. R. Young, K. S. Sim, H. Hiejima, K. Imai, Jan Rak, R. Lacey, R. Granier de Cassagnac, S. N. White, W. E. Sondheim, P. A. Rukoyatkin, S. Y. Fung, John Hill, H. A. Torii, Toru Sugitate, L. D. Isenhower, François Fleuret, T. Ichihara, Matthew G. Reuter, I. D. Ojha, 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, Elliptic flow, Hadron, 01 natural sciences, Charged particle, Color-glass condensate, Nuclear physics, Pseudorapidity, 0103 physical sciences, Quark–gluon plasma, Transverse momentum, Anisotropic flow, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: We present inclusive charged hadron elliptic flow (v(2)) measured over the pseudorapidity range vertical bar eta vertical bar 6.5) pseudorapidities and (2) the two-particle cumulant method extracted using correlations between particles detected at midrapidity. The two event-plane results are consistent within systematic uncertainties over the measured p(T) and in centrality 0-40%. There is at most a 20% difference in the v(2) between the two event-plane methods in peripheral (40-60%) collisions. The comparisons between the two-particle cumulant results and the standard event-plane measurements are discussed.
Published: 2009

25. Measurement of Bottom Versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations inp+pCollisions ats=200 GeV

Author: A. Deshpande, C. L. Woody, P. Tarján, A. Berdnikov, D. E. Fields, E. Kistenev, H. Harada, S. Dairaku, A. Yu. Semenov, B. V. Jacak, J. Gosset, Y. Watanabe, M. B. Deaton, H. Pei, Y. Tanaka, O. Zaudtke, M. McCumber, Mate Csanad, F. Staley, L. Baksay, Ajit Kumar Mohanty, C. Silvestre, I. Younus, Tae-Yeon Lee, A. Soldatov, T. A. Shibata, T. Sato, L. Tomáek, I. V. Sourikova, Senta Greene, S. Yokkaichi, Martin Purschke, M. K. Lee, M. Virius, Y. Nakamiya, G. Baksay, K. S. Sim, V. Dzhordzhadze, Y. Kwon, Saskia Mioduszewski, C. A. Ogilvie, D. Isenhower, A. Toia, D. Kotchetkov, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, E. H. Kim, R. Yang, A. T. Basye, David D'Enterria, H. Hiejima, T. K. Hemmick, M. Naglis, A. Morreale, Yasuo Miake, B. E. Norman, C. L. Silva, C. R. Cleven, C. Haegemann, Y. Inoue, B. Fadem, E. O'Brien, R. A. Soltz, M. N. Wagner, M. Rosati, Y. Fukao, N. N. Ajitanand, Y. Ikeda, A. Shevel, Z. Fraenkel, J. G. Boissevain, E. J. Mannel, T. Niita, Masashi Kaneta, T. Hester, K. A. Drees, A. Glenn, R. Tanabe, D. Layton, K. Imai, Masayasu Ishihara, M. Grosse Perdekamp, M. Ouchida, T. Kempel, Dong-Hun Kim, Susumu Sato, R. K. Choudhury, L. Kochenda, C. Pinkenburg, Y. Onuki, N. Means, J. Jin, B. Azmoun, E. M. Takagui, Takahiro Nakamura, J. L. Charvet, D. Kawall, A. Král, M. J. Kweon, J. Asai, K. Tanida, H. Themann, W. C. Chang, M. Stepanov, G. Roche, Steven E. Skutnik, C. Baumann, Y. J. Mao, A. A. Vinogradov, Jan Rak, S. Kametani, T. Horaguchi, V-N. Tram, C. P. Singh, V. I. Kochetkov, N. Grau, G. S. Kyle, B. M. Johnson, Susumu Oda, J. Murata, Herve Borel, D. Lynch, F. Matathias, James Alexander, J. H. Kang, J. S. Haggerty, A. Romana, Kensuke Homma, R. Lacey, R. Granier de Cassagnac, A. Adare, T. E. Miller, M. Kurosawa, A. Isupov, C. Suire, A. Durum, Motoi Inaba, Jiangyong Jia, Y. Goto, R. Averbeck, Byung-Sik Hong, R. Pak, L. Maek, H. Qu, J. Sziklai, Gerd Joachim Kunde, A. Bazilevsky, I. Shein, Shingo Sakai, Rushan Han, T. L. Thomas, Robert F. Hobbs, D. Winter, N. Kamihara, P. Chung, K. Yamaura, Philippe Rosnet, K. O. Eyser, A. K. Purwar, K. Fujiwara, K. Sedgwick, D. Yu Peressounko, P. Constantin, P. Mike, V. L. Rykov, T. Dahms, J. Imrek, K. Das, S. Butsyk, S. Chernichenko, Brian Cole, R. S. Towell, Hideki Hamagaki, K. Aoki, Alberto Baldisseri, Alexandre Lebedev, Vladimir Samsonov, G. David, M. Oka, D. M. Lee, Y. S. Lai, R. Armendariz, E. P. Hartouni, I. Ravinovich, Kazuyoshi Kurita, B. Bassalleck, A. Dion, W. S. Emam, Y. Nagata, I. Garishvili, Akio Kiyomichi, F. Wei, Debashish Pal, K. Kiriluk, A. Drees, M. Bai, Y. L. Yamaguchi, S. Sawada, J. Ying, A. Franz, B. Komkov, M. Konno, J. Kubart, N. Kurihara, H. Kanou, Taku Gunji, H. Gong, Ryugo S. Hayano, J. Seele, Atsushi Taketani, K. Sakashita, H. Liu, F. Kajihara, C. Y. Chi, Anne Marie Sickles, Y. Riabov, Kenta Shigaki, K. Shoji, H. W. Van Hecke, Norio Saito, Tamas Ferenc Csorgo, M. A. L. Leite, J. T. Mitchell, A. Enokizono, H. Delagrange, R. Seidl, M. Nguyen, Vladislav Manko, K. S. Joo, R. Bennett, J. L. Nagle, C. M. Camacho, Prashant Shukla, A. S. Nyanin, P. W. Stankus, M. Slunečka, M. Finger, J. S. Kapustinsky, S. F. Pate, Rachid Nouicer, V. Babintsev, J. Egdemir, S. Belikov, Jason Kamin, S. Zhou, S. Bathe, S. P. Stoll, S. D. Rolnick, Agneta Oskarsson, H. Al-Bataineh, T. Ichihara, G. R. Young, Matthew G. Reuter, Y. Berdnikov, Takahiro Fusayasu, Y. Akiba, O. Dietzsch, C. Vale, B. S. Chang, M. Mishra, Alexander Malakhov, S. S.E. Rosendahl, G. Bunce, B. Love, E. T. Atomssa, H. Valle, S. Nagamiya, V. Papavassiliou, Sébastien Gadrat, D. Sharma, Christine Angela Aidala, J. Klay, R. Ichimiya, K. Dehmelt, Vaclav Vrba, Klaus Johannes Reygers, D. Silvermyr, L. S. Zolin, A. G. Litvinenko, Dipanwita Dutta, Jen-Chieh Peng, W. J. Park, A. Churyn, A. Kiss, M. Mitrovski, P. D. Barnes, A. Yanovich, D. Jouan, Julia Velkovska, Z. Yasin, Henner Buesching, S. N. White, A. Kozlov, R. Seto, K. Haruna, M. Wysocki, Xiong Wang, Zvi Hirsh Citron, Marcus Hohlmann, Dong Jo Kim, Osamu Jinnouchi, K. Nakano, W. E. Sondheim, S. Takagi, D. Ivanischev, Hiroaki Ohnishi, K. B. Lee, K. N. Barish, S. Afanasiev, A. Ster, P. A. Rukoyatkin, A. Veicht, John Hill, I. Tserruya, Yu. Efremenko, V. Singh, P. Ruička, P. Liebing, D. Hornback, Toru Sugitate, L. D. Isenhower, M. Heffner, M. L. Brooks, A. Taranenko, X. He, O. O. Omiwade, Kazushi Miki, François Fleuret, Brajesh K. Singh, V. Peresedov, Beau Meredith, V. S. Pantuev, J. Koster, Alexander Milov, I. Nakagawa, T. Engelmore, D. Roach, K. M. Kijima, O. Drapier, Frank Ellinghaus, T. Lika, S. Batsouli, H. Masui, A. K. Dubey, Junji Tojo, E. R. Kinney, A. A. Bickley, Hiroyuki Okada, D. P. Morrison, S. Campbell, Eva Haslum, B. Lenzi, K. Okada, B. Sahlmueller, H. En'yo, M. J. Leitch, V. E. Semenov, J. Zimányi, Tatsuya Chujo, Xingguo Li, M. Gonin, A. Sukhanov, H. Pereira, Y. Morino, S. P. Sorensen, Dylan Walker, Seong H. Kim, J. G. Lajoie, T. Hachiya, I. J. Choi, A. Kravitz, Minghui Liu, Kenneth Francis Read, Tadaaki Isobe, P. L. McGaughey, M. Chiu, A. V. Kazantsev, A. Hadj Henni, Maya Hachiya Shimomura, Y. I. Makdisi, M. J. Tannenbaum, H. Torii, D. Mukhopadhyay, S. Rembeczki, J. Chiba, Beomkyu Kim, K. Boyle, T. C. Awes, Kyoichiro Ozawa, Takao Sakaguchi, C. Klein-Boesing, Jun Kikuchi, A. D. Frawley, T. Tabaru, S. Huang, S. H. Aronson, W. Holzmann, Wei Xie, M. I. Nagy, M. Issah, M. D. Malik, E. Vznuzdaev, L. Aphecetche, Johannes Peter Wessels, H. A. Gustafsson, C. Zhang, R. Vértesi, Viktor Riabov, A. P.T. Palounek, S. Esumi, W. A. Zajc, Jason Newby, V. Baublis, A. Denisov, V. Cianciolo, Y. Tomita, J. E. Frantz, Sergey Fokin, E. J. Desmond, M. Togawa, J. Park, Y. Tsuchimoto, I. E. Yushmanov, Alexei Khanzadeev, E. Stenlund, H. Sakata, T. V. Moukhanova, and Charles Maguire
Subjects: Quark, Semileptonic decay, Quantum chromodynamics, Physics, Particle physics, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, Electron, 01 natural sciences, Nuclear physics, Momentum, 0103 physical sciences, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: The momentum distribution of electrons from semileptonic decays of charm and bottom quarks for midrapidity |y| e(+/-)K(-/+)X (K unidentified) reconstruction. It is found that the yield of electrons from bottom becomes significant above 4 GeV/c in p(T). A fixed-order-plus-next-to-leading-log perturbative quantum chromodynamics calculation agrees with the data within the theoretical and experimental uncertainties. The extracted total bottom production cross section at this energy is sigma(bb)=3.2(-1.1)(+1.2)(stat)(-1.3)(+1.4)(syst)mu b.
Published: 2009

26. Gluon-Spin Contribution to the Proton Spin from the Double-Helicity Asymmetry in Inclusiveπ0Production in Polarizedp+pCollisions ats=200 GeV

Author: Yu. Efremenko, Tadaaki Isobe, H. Pei, V. Singh, K. S. Sim, V. Dzhordzhadze, P. Tarján, P. L. McGaughey, Y. Watanabe, M. Chiu, A. Yu. Semenov, J. Gosset, R. Yang, S. Afanasiev, A. Ster, M. Gonin, S. Taneja, B. Azmoun, A. Král, M. J. Kweon, F. Matathias, J. Newby, G. Roche, L. Aphecetche, T. L. Thomas, Kensuke Homma, K. Imai, Tae-Yeon Lee, Martin Purschke, A. Morreale, Z. Fraenkel, A. Sukhanov, H. Pereira, Y. Morino, Senta Greene, R. K. Choudhury, L. Tomášek, V. S. Pantuev, S. Yokkaichi, R. S. Towell, I. Garishvili, F. Wei, K. A. Drees, A. V. Kazantsev, Y. L. Yamaguchi, A. T. Basye, B. Fadem, E. O'Brien, P. Constantin, B. Komkov, S. Chernichenko, K. Sakashita, Ryugo S. Hayano, M. Oka, A. Dion, Jen-Chieh Peng, S. Bathe, D. Hornback, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Johannes Peter Wessels, C. M. Camacho, Prashant Shukla, B. Bassalleck, N. N. Ajitanand, Agneta Oskarsson, Atsushi Taketani, A. Enokizono, P. Liebing, C. Silvestre, Anne Marie Sickles, K. Okada, Youngil Kwon, K. S. Joo, S. F. Pate, Norio Saito, M. A. L. Leite, A. Deshpande, M. Rosati, Y. Riabov, M. Heffner, M. Konno, Taku Gunji, H. Gong, B. Sahlmueller, R. A. Soltz, H. En'yo, M. J. Leitch, Dong Jo Kim, M. I. Nagy, M. Issah, C. Pinkenburg, Marisilvia Donadelli, V. Bumazhnov, J. Seele, Y. Berdnikov, D. Sharma, T. C. Awes, M. D. Malik, C. Y. Chi, R. Ichimiya, Y. Akiba, Kyoichiro Ozawa, T. Liška, A. Taranenko, Kenta Shigaki, Jun Kikuchi, M. Nguyen, Takahiro Nakamura, M. Grosse Perdekamp, J. Egdemir, E. Vznuzdaev, S. P. Sorensen, Dylan Walker, M. Stepanov, Y. Tanaka, Andry Malala Rakotozafindrabe, Takao Sakaguchi, M. Mishra, S. Nagamiya, S. Dairaku, H. Al-Bataineh, X. R. Wang, A. Veicht, F. Kajihara, G. R. Young, Kazushi Miki, J. S. Kapustinsky, Brajesh K. Singh, Susumu Oda, A. Durum, Y. J. Mao, A. S. Nyanin, Seong H. Kim, T. Horaguchi, C. Klein-Boesing, K. Das, Christophe Pierre Suire, Alexander Milov, Rachid Nouicer, C. Baumann, I. Nakagawa, V. Babintsev, S. Kametani, Y. Nakamiya, Vaclav Vrba, Klaus Johannes Reygers, Minghui Liu, R. Tanabe, D. Layton, A. A. Vinogradov, T. Engelmore, Kenneth Francis Read, Y. Onuki, E. J. Desmond, J. G. Lajoie, Jason Kamin, A. D. Frawley, A. Hadj Henni, J. H. Kang, O. Zaudtke, Jan Rak, J. S. Haggerty, E. P. Hartouni, C. P. Singh, G. S. Kyle, O. Drapier, Frank Ellinghaus, K. Yamaura, F. Staley, L. Baksay, E. R. Kinney, Jiangyong Jia, R. Lacey, B. M. Johnson, Y. Goto, Beomkyu Kim, K. Boyle, S. Huang, R. Granier de Cassagnac, A. Adare, I. J. Choi, Wei Xie, A. Kravitz, S. P. Stoll, D. P. Morrison, S. Campbell, Charles Maguire, James Alexander, C. L. Woody, A. Berdnikov, S. Butsyk, K. B. Lee, V. Papavassiliou, D. E. Fields, D. Winter, D. Yu Peressounko, I. Younus, Y. S. Lai, M. Togawa, A. Kiss, S. Zhou, W. Holzmann, Maya Hachiya Shimomura, H. Liu, R. Averbeck, B. V. Jacak, Byung-Sik Hong, A. Bazilevsky, M. Virius, V. E. Semenov, K. Shoji, S. S.E. Rosendahl, Tatsuya Chujo, E. Kistenev, M. McCumber, A. Isupov, J. Sziklai, Y. I. Makdisi, D. Roach, G. Baksay, K. M. Kijima, Alexandre Lebedev, Hiroyuki Okada, D. M. Lee, I. V. Sourikova, G. Bunce, A. Soldatov, Henner Buesching, S. D. Rolnick, J. L. Charvet, Brian Cole, W. C. Chang, Rushan Han, Eva Haslum, B. Lenzi, A. Churyn, S. Sawada, J. Ying, A. Franz, A. Glenn, M. Kurosawa, Xingguo Li, Vladimir Samsonov, M. J. Tannenbaum, P. W. Stankus, D. Jouan, H. Torii, I. Ravinovich, K. Kiriluk, A. P.T. Palounek, M. Ouchida, M. Naglis, P. Chand, N. Means, J. Asai, R. Pak, D. Mukhopadhyay, S. Rembeczki, C. L. Silva, Marcus Hohlmann, P. Chung, J. T. Mitchell, R. Seidl, E. H. Kim, H. A. Gustafsson, N. Kamihara, J. Imrek, S. E. Williamson, Tamas Ferenc Csorgo, M. Bai, X. He, Shingo Sakai, C. Zhang, Vladislav Manko, M. Slunečka, J. L. Nagle, Kazuyoshi Kurita, P. Ružička, P. Mikeš, V. Peresedov, Masayasu Ishihara, A. Drees, Viktor Riabov, S. Belikov, Ajit Kumar Mohanty, Y. Fukao, T. A. Shibata, S. Esumi, T. Sato, P. Rosnet, K. O. Eyser, A. K. Purwar, O. Dietzsch, W. A. Zajc, V. Baublis, J. Koster, K. Fujiwara, E. T. Atomssa, H. Valle, T. Hester, A. Denisov, V. Cianciolo, Y. Tomita, D. Kawall, K. Tanida, H. Themann, Sergey Fokin, D. Isenhower, C. Vale, B. S. Chang, V. I. Kochetkov, A. Toia, Dipanwita Dutta, J. Jin, R. Bennett, E. M. Takagui, S. Batsouli, L. Mašek, H. Masui, A. K. Dubey, T. Kempel, Dong-Hun Kim, J. Murata, Christine Angela Aidala, J. Klay, T. Niita, Julia Velkovska, Gerd Joachim Kunde, I. Shein, A. A. Bickley, V-N. Tram, H. W. Van Hecke, N. Grau, M. Finger, K. Sedgwick, Motoi Inaba, Alberto Baldisseri, B. Love, Mate Csanad, David D'Enterria, Herve Borel, D. Lynch, A. G. Litvinenko, V. L. Rykov, T. Dahms, A. Kozlov, R. Seto, K. Haruna, K. N. Barish, J. Park, Y. Tsuchimoto, I. E. Yushmanov, Alexei Khanzadeev, E. Stenlund, T. V. Moukhanova, R. Vértesi, J. E. Frantz, M. L. Brooks, C. A. Ogilvie, T. K. Hemmick, M. Wysocki, Yasuo Miake, L. Kochenda, H. Qu, Hideki Hamagaki, K. Aoki, G. David, S. N. White, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, P. A. Rukoyatkin, B. Meredith, John Hill, Toru Sugitate, François Fleuret, T. Ichihara, Matthew G. Reuter, Takahiro Fusayasu, Alexander Malakhov, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, and I. Tserruya
Subjects: Quantum chromodynamics, Physics, Particle physics, 010308 nuclear & particles physics, General Physics and Astronomy, Inelastic scattering, Deep inelastic scattering, 01 natural sciences, Helicity, Nuclear physics, Baryon, Pion, 0103 physical sciences, Proton spin crisis, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: The double helicity asymmetry in neutral pion production for p(T) = 1 to 12 GeV/c was measured with the PHENIX experiment to access the gluon-spin contribution, Delta G, to the proton spin. Measured asymmetries are consistent with zero, and at a theory scale of mu 2 = 4 GeV2 a next to leading order QCD analysis gives Delta G([0.02,0.3]) = 0.2, with a constraint of -0.7 < Delta G([0.02,0.3]) < 0.5 at Delta chi(2) = 9 (similar to 3 sigma) for the sampled gluon momentum fraction (x) range, 0.02 to 0.3. The results are obtained using predictions for the measured asymmetries generated from four representative fits to polarized deep inelastic scattering data. We also consider the dependence of the Delta G constraint on the choice of the theoretical scale, a dominant uncertainty in these predictions.
Published: 2009

27. Inclusive cross section and double helicity asymmetry forπ0production inp+pcollisions ats=62.4 GeV

Author: P. Rosnet, V. Singh, P. Liebing, Maya Hachiya Shimomura, K. O. Eyser, A. K. Purwar, K. Fujiwara, Y. I. Makdisi, R. A. Soltz, H. Borel, A. Deshpande, Y. Fukao, K. N. Barish, Anne Marie Sickles, A. Yu. Semenov, B. Azmoun, A. Král, M. J. Kweon, M. Grosse Perdekamp, T. Hester, J. Gosset, J. T. Mitchell, R. Seidl, Vladislav Manko, A. V. Kazantsev, M. Slunečka, S. Belikov, C. Vale, F. Matathias, Kensuke Homma, B. S. Chang, Christine Angela Aidala, J. Klay, Y. Tanaka, P. Constantin, S. Chernichenko, J. L. Charvet, A. P.T. Palounek, B. Bassalleck, S. Sawada, E. H. Kim, M. Konno, H. W. Van Hecke, Y. Nakamiya, J. Ying, A. Franz, A. Berdnikov, G. R. Young, R. S. Towell, I. Garishvili, F. Wei, G. Baksay, Alexei Khanzadeev, E. Stenlund, K. Sakashita, S. Esumi, H. Liu, M. L. Brooks, X. He, W. A. Zajc, S. P. Sorensen, K. A. Drees, Youngil Kwon, L. Baksay, J. Egdemir, Christophe Pierre Suire, Alexander Milov, M. Oka, A. Dion, V-N. Tram, N. Grau, S. Bathe, S. Dairaku, K. Shoji, M. J. Tannenbaum, V. Baublis, Hiroyuki Okada, Dylan Walker, A. Denisov, V. Cianciolo, I. Nakagawa, T. Engelmore, Y. L. Yamaguchi, Y. Tomita, B. Komkov, M. Kurosawa, Charles Maguire, Marisilvia Donadelli, V. Bumazhnov, Jason Kamin, A. Hadj Henni, Sergey Fokin, Agneta Oskarsson, V. Peresedov, T. C. Awes, T. Liška, Norio Saito, Atsushi Taketani, M. A. L. Leite, P. W. Stankus, O. Drapier, Frank Ellinghaus, Y. Berdnikov, H. Torii, E. R. Kinney, T. V. Moukhanova, I. Younus, Jun Kikuchi, Andry Malala Rakotozafindrabe, S. P. Stoll, A. Enokizono, Y. Akiba, J. Koster, D. E. Fields, M. Mishra, Eva Haslum, B. Lenzi, Motoi Inaba, K. S. Sim, Tae-Yeon Lee, D. P. Morrison, E. J. Desmond, S. Campbell, V. Dzhordzhadze, S. Nagamiya, J. S. Kapustinsky, Y. Watanabe, K. Das, M. Togawa, J. Park, B. V. Jacak, D. Winter, D. Yu Peressounko, Seong H. Kim, E. Kistenev, S. S.E. Rosendahl, Martin Purschke, J. G. Lajoie, O. Dietzsch, V. Babintsev, Minghui Liu, S. Batsouli, H. Masui, R. Tanabe, D. Layton, A. Soldatov, S. Afanasiev, Beomkyu Kim, K. Boyle, V. E. Semenov, C. Y. Chi, Tatsuya Chujo, I. V. Sourikova, H. A. Gustafsson, Vaclav Vrba, Klaus Johannes Reygers, E. T. Atomssa, S. N. White, R. Yang, Y. Tsuchimoto, G. Bunce, E. P. Hartouni, Wei Xie, P. Chung, M. McCumber, Mate Csanad, Kenneth Francis Read, A. K. Dubey, H. Valle, A. A. Bickley, A. Ster, J. Imrek, T. L. Thomas, G. S. Kyle, M. Wysocki, C. Zhang, James Alexander, Jen-Chieh Peng, D. Mukhopadhyay, S. Rembeczki, I. E. Yushmanov, O. Zaudtke, R. Vértesi, P. Tarján, P. Ružička, Dipanwita Dutta, Tadaaki Isobe, S. Yokkaichi, R. Averbeck, Byung-Sik Hong, J. Newby, G. Roche, A. Bazilevsky, A. Kiss, K. Imai, W. C. Chang, A. Churyn, P. L. McGaughey, Viktor Riabov, Alexandre Lebedev, D. Jouan, A. Morreale, H. Pei, Julia Velkovska, C. Baumann, S. Kametani, B. Love, M. Chiu, D. M. Lee, Z. Fraenkel, C. M. Camacho, Prashant Shukla, Ryugo S. Hayano, Y. Onuki, J. E. Frantz, I. J. Choi, A. Kravitz, Henner Buesching, C. L. Woody, R. Pak, K. Kiriluk, M. Rosati, David D'Enterria, N. N. Ajitanand, C. P. Singh, Zvi Hirsh Citron, D. Hornback, K. Nakano, Dong Jo Kim, M. Heffner, B. M. Johnson, R. K. Choudhury, S. F. Pate, Jan Rak, Y. Riabov, Rushan Han, Ajit Kumar Mohanty, N. Kamihara, T. A. Shibata, R. Lacey, Takahiro Nakamura, A. G. Litvinenko, A. Taranenko, R. Granier de Cassagnac, Kenta Shigaki, W. E. Sondheim, H. Qu, K. Ozawa, T. Sato, P. Chand, K. S. Joo, A. Adare, Susumu Oda, M. Gonin, M. Virius, Kazushi Miki, Marcus Hohlmann, A. Veicht, A. Isupov, M. Nguyen, Vladimir Samsonov, H. Al-Bataineh, X. R. Wang, Kazuyoshi Kurita, A. A. Vinogradov, D. Ivanischev, A. Durum, Brajesh K. Singh, Hideki Hamagaki, K. Aoki, J. Sziklai, Senta Greene, A. Drees, G. David, P. Mikeš, A. T. Basye, Catherine Micaela Silvestre, Jiangyong Jia, Y. Goto, K. Yamaura, A. Kozlov, R. Seto, P. A. Rukoyatkin, Takao Sakaguchi, T. Ichihara, Brian Cole, M. Naglis, A. S. Nyanin, L. Tomášek, C. L. Silva, V. S. Pantuev, D. Sharma, V. Papavassiliou, C. Klein-Boesing, A. Sukhanov, B. Fadem, D. Isenhower, Matthew G. Reuter, E. O'Brien, Rachid Nouicer, R. Ichimiya, Takahiro Fusayasu, K. Haruna, A. Toia, H. Pereira, A. D. Frawley, Alexander Malakhov, Tamas Ferenc Csorgo, L. Mašek, C. A. Ogilvie, J. L. Nagle, T. K. Hemmick, D. Silvermyr, S. Huang, S. E. Williamson, T. Niita, Masayasu Ishihara, Yasuo Miake, L. S. Zolin, Y. Ikeda, W. J. Park, T. Kempel, Dong-Hun Kim, Taku Gunji, H. Gong, J. Seele, L. Kochenda, M. I. Nagy, Y. Morino, W. Holzmann, P. D. Barnes, A. Yanovich, J. Jin, E. M. Takagui, M. Ouchida, K. Okada, F. Kajihara, B. Sahlmueller, H. En'yo, N. Means, M. J. Leitch, J. Asai, B. Meredith, S. Butsyk, J. G. Boissevain, E. J. Mannel, S. Zhou, A. Baldisseri, S. D. Rolnick, John Hill, Shingo Sakai, Toru Sugitate, M. Issah, M. D. Malik, E. Vznuzdaev, François Fleuret, F. Staley, D. Kawall, A. Glenn, K. Tanida, H. Themann, V. I. Kochetkov, J. Murata, Gerd Joachim Kunde, K. B. Lee, I. Shein, L. Aphecetche, K. Sedgwick, C. Pinkenburg, Johannes Peter Wessels, M. Stepanov, Y. J. Mao, T. Horaguchi, J. H. Kang, J. S. Haggerty, D. Roach, K. M. Kijima, D. Lynch, Y. S. Lai, Xingguo Li, V. L. Rykov, T. Dahms, I. Ravinovich, M. Bai, R. Bennett, M. Finger, I. Tserruya, and Yu. Efremenko
Subjects: Quantum chromodynamics, Physics, Particle physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, media_common.quotation_subject, Nuclear Theory, Perturbative QCD, Polarization (waves), 7. Clean energy, 01 natural sciences, Helicity, Asymmetry, Gluon, Nuclear physics, Transverse plane, Proton spin crisis, 0103 physical sciences, Statistical precision, High Energy Physics::Experiment, Relativistic Heavy Ion Collider, Nuclear Experiment, 010306 general physics, media_common
Abstract: The PHENIX experiment presents results from the Relativistic Heavy Ion Collider 2005 run with polarized proton collisions at sqrt(s)=200 GeV, for inclusive {pi}{sup 0} production at midrapidity. Unpolarized cross section results are given for transverse momenta p{sub T}=0.5 to 20 GeV/c, extending the range of published data to both lower and higher p{sub T}. The cross section is described well for p{sub T} 2 GeV/c, by perturbative QCD. Double helicity asymmetries ALL are presented based on a factor of 5 improvement in uncertainties as compared to previously published results, due to both an improved beam polarization of 50%, and to higher integrated luminosity. These measurements are sensitive to the gluon polarization in the proton. Using one representative model of gluon polarization it is demonstrated that the gluon spin contribution to the proton spin is significantly constrained.
Published: 2009

28. Suppression Pattern of Neutral Pions at High Transverse Momentum inAu+AuCollisions atsNN=200 GeVand Constraints on Medium Transport Coefficients

Author: S. Esumi, Y. J. Mao, S. Kametani, B. Love, R. A. Soltz, Marie Germain, Minghui Liu, E. H. Kim, J. H. Kang, W. A. Zajc, David D'Enterria, J. S. Haggerty, M. Grosse Perdekamp, A. G. Litvinenko, Kenneth Francis Read, C. Silvestre, M. Chiu, Marisilvia Donadelli, V. Bumazhnov, Andry Malala Rakotozafindrabe, K. Hasuko, A. Romana, Roy A. Lacey, Rushan Han, M. N. Hagiwara, T. A. Shibata, V. Baublis, A. Denisov, V. Cianciolo, M. Issah, R. P. Pisani, F. Matathias, J. L. Drachenberg, K. Dehmelt, Evert Stenlund, Kensuke Homma, M. D. Malik, E. Vznuzdaev, Nikolay Tyurin, E. J. Desmond, A. Kozlov, K. S. Sim, J. Chiba, Hiroyuki Okada, Joakim Nystrand, Jen-Chieh Peng, D. Winter, M. P. Comets, Sergey Fokin, S. Chernichenko, H. Lim, M. N. Wagner, A. V. Kazantsev, S. P. Sorensen, D. Isenhower, A. Hadj Henni, Dylan Walker, R. Seto, K. Haruna, B. Bassalleck, D. Yu Peressounko, M. Togawa, J. Park, Florian Bauer, D. E. Fields, A. Toia, Eva Haslum, B. Lenzi, Y. Kwon, K. Boyle, Wei Xie, T. Horaguchi, G. C. Mishra, L. Mašek, A. Shevel, B. V. Jacak, Xiong Wang, Takao Sakaguchi, Y. S. Lai, M. Konno, P. Tarján, H. Hiejima, V. Dzhordzhadze, S. Takagi, Y. Tsuchimoto, T. Hester, C. Klein-Boesing, Dong Jo Kim, P. Mikeš, M. McCumber, A. K. Purwar, Osamu Jinnouchi, M. Ouchida, J. G. Lajoie, J. Asai, R. Pak, K. N. Barish, A. D. Frawley, Xiao-yan Li, Y. Nakamiya, T. Tabaru, Yoichiro Fukao, T. Hachiya, S. Batsouli, H. Kanou, Taku Gunji, H. Gong, J. Seele, I. E. Yushmanov, J. G. Boissevain, Senta Greene, Ingvar Otterlund, K. O. Eyser, K. Fujiwara, N. Kamihara, N. Grau, S. H. Aronson, K. Imai, O. Zaudtke, S. Afanasiev, A. Ster, Alexei Khanzadeev, G. Baksay, S. Kelly, N. N. Ajitanand, V-N. Tram, B. E. Norman, Masashi Kaneta, W. Holzmann, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, Johannes Peter Wessels, M. T. Bjorndal, T. C. Awes, Kyoichiro Ozawa, T. Liška, R. Armendariz, I. J. Choi, A. Kravitz, E. O'Brien, Hiroaki Ohnishi, Shingo Sakai, F. Kajihara, K. Shoji, H. Sakata, J. Newby, O. Drapier, Frank Ellinghaus, Maya Hachiya Shimomura, Takahiro Nakamura, Kazuyoshi Kurita, Jun Kikuchi, Y. I. Makdisi, Motoi Inaba, Tadaaki Isobe, E. R. Kinney, D. P. Morrison, M. C. McCain, G. S. Kyle, C. L. Woody, C. Pinkenburg, S. Campbell, Susumu Oda, James Alexander, Charles Maguire, S. Leckey, J. S. Chai, H. Delagrange, A. Drees, T. Shohjoh, J. T. Mitchell, A. Durum, V. E. Semenov, A. P.T. Palounek, Anne Marie Sickles, M. Virius, N. Willis, J. Zimányi, M. L. Brooks, J. Kubart, P. W. Stankus, R. Seidl, Vladislav Manko, Tatsuya Chujo, R. Averbeck, I. Tserruya, P. L. McGaughey, D. S. Brown, Byung-Sik Hong, M. Slunečka, A. Bazilevsky, M. J. Tannenbaum, Yu. Efremenko, M. Stepanov, G. Roche, Philippe Rosnet, V. Singh, D. Hornback, Anders Oskarsson, O. O. Omiwade, Alexandre Lebedev, H. W. Van Hecke, S. Zhou, K. Das, T. V. Moukhanova, D. M. Lee, J. Gosset, M. Heffner, I. V. Sourikova, E. P. Hartouni, Steven E. Skutnik, J. P. Sullivan, C. Vale, D. Mukhopadhyay, S. Rembeczki, V. Peresedov, Y. Le Bornec, D. Bucher, T. L. Thomas, C. Zhang, B. S. Chang, C. A. Ogilvie, T. K. Hemmick, X. He, Xingguo Li, Yasuo Miake, Robert F. Hobbs, A. Taranenko, Hirohiko Sato, Kazushi Miki, Y. L. Yamaguchi, Christine Angela Aidala, J. Klay, G. R. Young, S. K. Tuli, Y. S. Kim, B. Komkov, Ryugo S. Hayano, Hans-Åke Gustafsson, M. Gonin, S. Bathe, Y. Riabov, L. Kochenda, J. L. Charvet, Norio Saito, Kenta Shigaki, H. Masui, Viktor Riabov, M. A. L. Leite, H. Pereira, A. K. Dubey, M. Nguyen, Jan Rak, A. S. Nyanin, S. Yokkaichi, J. M. Heuser, A. A. Bickley, T. Kawagishi, H. Qu, Josh Moss, R. Granier de Cassagnac, A. Adare, Debashish Pal, T. E. Miller, Hideki Hamagaki, K. Aoki, J. Egdemir, S. Sawada, Y. Berdnikov, G. David, J. Ying, V. Babintsev, A. Franz, Y. Cobigo, E. T. Atomssa, Jason Kamin, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, R. Vértesi, C. R. Cleven, C. Haegemann, Y. Inoue, Y. Akiba, A. Churyn, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, P. Chung, D. Jouan, J. Imrek, M. Holmes, J. E. Frantz, Vaclav Vrba, Klaus Johannes Reygers, E. Kistenev, P. J. Kroon, Dong-Hun Kim, W. S. Emam, Laurent Bernard Aphecetche, M. Mitrovski, Herve Borel, D. Lynch, A. Glenn, A. Kiss, M. Wysocki, V. L. Rykov, T. Dahms, Z. Yasin, H. Harada, I. Ravinovich, Henner Buesching, Y. Nagata, M. B. Deaton, S. F. Pate, S. S. Ryu, Marcus Hohlmann, Y. Tanaka, R. Bennett, T. K. Shea, Ahmed Al-Jamel, M. Finger, H. Al-Bataineh, V. Papavassiliou, Sébastien Gadrat, F. Staley, L. Baksay, H. Pei, M. Rosati, Bruno Espagnon, A. A. Vinogradov, Henrik Tydesjö, Jiangyong Jia, Y. Goto, O. Dietzsch, H. Valle, L. Tomášek, Julia Velkovska, V. S. Pantuev, D. Kawall, K. Tanida, M. Harvey, V. I. Kochetkov, D. Silvermyr, J. Murata, Gerd Joachim Kunde, I. Shein, Junji Tojo, Alberto Baldisseri, K. Okada, B. Sahlmueller, H. En'yo, P. Constantin, M. J. Leitch, R. S. Towell, I. Garishvili, Akio Kiyomichi, M. Naglis, J. M. Burward-Hoy, C. L. Silva, N. Kurihara, W. C. Smith, Tae-Yeon Lee, Martin Purschke, F. Gastineau, D. Kotchetkov, A. Morreale, Z. Fraenkel, Masayasu Ishihara, S. Belikov, K. S. Joo, M. K. Lee, Susumu Sato, D. Sharma, M. G. Hur, C. Y. Chi, B. Azmoun, A. Král, M. J. Kweon, A. Deshpande, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, Y. Watanabe, I. Younus, A. Soldatov, C. P. Singh, B. M. Johnson, A. Isupov, S. Butsyk, Vladimir Samsonov, Tamas Ferenc Csorgo, J. L. Nagle, J. Sziklai, Brian Cole, Saskia Mioduszewski, J. Jin, E. M. Takagui, S. N. White, K. Nakano, W. E. Sondheim, P. A. Rukoyatkin, T. Ichihara, Matthew G. Reuter, Takahiro Fusayasu, I. D. Ojha, Alexander Malakhov, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, S. Y. Fung, John Hill, H. A. Torii, Toru Sugitate, L. D. Isenhower, François Fleuret, B. Forestier, and Mate Csanad
Subjects: Quenching, Physics, Spectral shape analysis, 010308 nuclear & particles physics, Root (chord), General Physics and Astronomy, Parton, Transport theory, 01 natural sciences, Measure (mathematics), Nuclear physics, Pion, 0103 physical sciences, Transverse momentum, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: For Au + Au collisions at 200 GeV, we measure neutral pion production with good statistics for transverse momentum, p(T), up to 20 GeV/c. A fivefold suppression is found, which is essentially constant for 5 in the parton quenching model. The spectral shape is similar for all collision classes, and the suppression does not saturate in Au + Au collisions.
Published: 2008

29. Onset ofπ0Suppression Studied inCu+CuCollisions atsNN=22.4, 62.4, and 200 GeV

Author: M. J. Tannenbaum, H. Torii, D. Mukhopadhyay, S. Rembeczki, S. P. Sorensen, Dylan Walker, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, S. Dairaku, Charles Maguire, Seong H. Kim, R. Tanabe, D. Layton, J. G. Lajoie, T. Hachiya, I. J. Choi, A. Kravitz, W. C. Chang, Roy A. Lacey, N. N. Ajitanand, Rushan Han, Takahiro Nakamura, Susumu Oda, D. Lynch, A. Durum, V. L. Rykov, T. Dahms, S. Butsyk, Vladimir Samsonov, Ajit Kumar Mohanty, T. A. Shibata, T. Sato, Catherine Micaela Silvestre, K. Yamaura, O. Zaudtke, Tamas Ferenc Csorgo, E. Kistenev, M. Virius, J. L. Nagle, B. Azmoun, D. Isenhower, Y. Onuki, Hiroaki Ohnishi, K. B. Lee, A. Toia, A. Král, R. Vértesi, M. J. Kweon, M. Gonin, A. Glenn, L. Mašek, A. Sukhanov, H. Pereira, C. M. Camacho, Y. Morino, A. V. Kazantsev, H. Harada, K. O. Eyser, M. Oka, A. K. Purwar, Prashant Shukla, K. Fujiwara, D. Roach, K. M. Kijima, I. Ravinovich, J. Chiba, Y. Nagata, T. Niita, M. Bai, Xingguo Li, A. Dion, G. S. Kyle, Takao Sakaguchi, C. Klein-Boesing, R. Bennett, S. F. Pate, Steven E. Skutnik, D. E. Fields, M. Finger, J. L. Charvet, James Alexander, R. S. Towell, P. Tarján, Atsushi Taketani, A. Enokizono, A. Shevel, A. D. Frawley, T. Tabaru, B. V. Jacak, J. E. Frantz, M. B. Deaton, Tae-Yeon Lee, Martin Purschke, Jan Rak, R. Averbeck, Byung-Sik Hong, K. A. Drees, H. Al-Bataineh, A. Bazilevsky, S. Huang, S. H. Aronson, T. E. Miller, M. Naglis, M. Kurosawa, E. T. Atomssa, M. McCumber, Y. Tanaka, J. T. Mitchell, Philippe Rosnet, M. K. Lee, C. L. Silva, I. Garishvili, Akio Kiyomichi, F. Wei, W. Holzmann, C. A. Ogilvie, Alexei Khanzadeev, T. Hester, R. Granier de Cassagnac, L. Tomášek, T. K. Hemmick, P. Chung, Alexandre Lebedev, D. M. Lee, V. S. Pantuev, A. Adare, L. Baksay, Masayasu Ishihara, Susumu Sato, E. Stenlund, H. Sakata, R. Seidl, Vladislav Manko, H. Qu, J. Imrek, W. S. Emam, K. Das, D. Kotchetkov, N. Kurihara, E. P. Hartouni, K. Kiriluk, H. Pei, F. Staley, H. Kanou, Taku Gunji, H. Gong, J. Seele, M. Slunečka, K. Dehmelt, V. Papavassiliou, Sébastien Gadrat, Robert F. Hobbs, Jen-Chieh Peng, Senta Greene, Junji Tojo, A. T. Basye, P. Mikeš, B. E. Norman, B. Fadem, E. O'Brien, R. A. Soltz, H. Borel, Yasuo Miake, Y. L. Yamaguchi, Xiong Wang, L. Aphecetche, B. Komkov, S. Belikov, Yoichiro Fukao, Dong Jo Kim, A. Morreale, F. Kajihara, K. Okada, M. Grosse Perdekamp, Osamu Jinnouchi, A. Deshpande, Z. Fraenkel, C. Y. Chi, B. Sahlmueller, T. C. Awes, Kyoichiro Ozawa, T. Liška, L. Kochenda, H. En'yo, Jun Kikuchi, Hideki Hamagaki, K. Aoki, T. V. Moukhanova, H. Delagrange, Norio Saito, A. Veicht, M. J. Leitch, G. David, O. Dietzsch, H. Valle, Debashish Pal, C. Vale, B. S. Chang, S. Sawada, V-N. Tram, N. Grau, Johannes Peter Wessels, M. A. L. Leite, Alexander Milov, H. W. Vanhecke, Dipanwita Dutta, J. Ying, A. Franz, I. Nakagawa, Christine Angela Aidala, T. Engelmore, J. Klay, R. K. Choudhury, Y. Watanabe, E. J. Desmond, O. Drapier, Frank Ellinghaus, D. Winter, D. Yu Peressounko, Anne Marie Sickles, Saskia Mioduszewski, E. R. Kinney, Motoi Inaba, I. Younus, K. S. Joo, D. P. Morrison, M. Togawa, S. Campbell, S. Zhou, Minghui Liu, B. Meredith, F. Matathias, Kensuke Homma, Mate Csanad, M. I. Nagy, V. E. Semenov, J. Park, M. Issah, J. Zimányi, A. Baldisseri, Kenneth Francis Read, Tatsuya Chujo, I. Tserruya, A. Soldatov, D. Kawall, K. Tanida, H. Themann, J. S. Kapustinsky, P. Constantin, S. Chernichenko, Yu. Efremenko, M. D. Malik, Julia Velkovska, E. Vznuzdaev, V. Singh, P. Liebing, Y. Tsuchimoto, V. I. Kochetkov, M. Mitrovski, V. Babintsev, H. Liu, R. Pak, B. Bassalleck, G. R. Young, Tadaaki Isobe, J. Murata, E. H. Kim, J. Jin, I. E. Yushmanov, David D'Enterria, M. Konno, K. Shoji, E. M. Takagui, N. Kamihara, M. Wysocki, Gerd Joachim Kunde, I. Shein, C. Baumann, P. L. McGaughey, C. P. Singh, Y. Nakamiya, M. Chiu, M. Rosati, A. Hadj Henni, P. W. Stankus, B. M. Johnson, X. He, O. O. Omiwade, R. Armendariz, Beomkyu Kim, K. Boyle, Kazuyoshi Kurita, K. S. Sim, V. Dzhordzhadze, K. Sedgwick, G. Baksay, V. Peresedov, D. Sharma, R. Ichimiya, M. N. Wagner, A. Isupov, C. Suire, Y. Kwon, Wei Xie, J. Koster, A. Drees, J. Sziklai, R. Yang, H. Hiejima, Brian Cole, A. A. Vinogradov, K. Imai, J. Kubart, S. Batsouli, H. Masui, K. Sakashita, J. Egdemir, Jiangyong Jia, A. K. Dubey, A. A. Bickley, Jason Kamin, S. Takagi, S. P. Stoll, Y. Goto, S. S.E. Rosendahl, G. Bunce, C. R. Cleven, K. N. Barish, C. Haegemann, Y. Inoue, A. Churyn, D. Jouan, T. Kempel, Dong-Hun Kim, M. L. Brooks, B. Love, A. G. Litvinenko, A. Kozlov, R. Seto, K. Haruna, S. Esumi, W. A. Zajc, M. Ouchida, N. Means, J. Asai, V. Baublis, A. Denisov, V. Cianciolo, A. Kiss, Z. Yasin, Henner Buesching, Shingo Sakai, Marcus Hohlmann, Y. Tomita, S. Bathe, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, T. L. Thomas, Sergey Fokin, Ryugo S. Hayano, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, Rachid Nouicer, C. L. Woody, A. Berdnikov, S. D. Rolnick, H. A. Gustafsson, I. V. Sourikova, C. Zhang, P. Ružička, Viktor Riabov, T. Ichihara, Matthew G. Reuter, Takahiro Fusayasu, A. P.T. Palounek, Alexander Malakhov, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, S. N. White, Y. J. Mao, S. Kametani, T. Horaguchi, Zvi Hirsh Citron, K. Nakano, J. H. Kang, W. E. Sondheim, J. S. Haggerty, S. Afanasiev, D. Ivanischev, A. Ster, A. Romana, J. Newby, P. A. Rukoyatkin, John Hill, D. Hornback, M. Heffner, Toru Sugitate, L. D. Isenhower, A. Taranenko, François Fleuret, Kazushi Miki, Brajesh K. Singh, Y. S. Lai, Hiroyuki Okada, Eva Haslum, A. Yu. Semenov, B. Lenzi, J. Gosset, S. Yokkaichi, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Masashi Kaneta, C. Pinkenburg, M. Stepanov, G. Roche, Maya Hachiya Shimomura, and Y. I. Makdisi
Subjects: Physics, Energy loss, Quantitative Biology::Neurons and Cognition, 010308 nuclear & particles physics, General Physics and Astronomy, chemistry.chemical_element, Parton, Inelastic scattering, 01 natural sciences, Copper, Spectral line, Nuclear physics, Pion, chemistry, 0103 physical sciences, Transverse momentum, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, Jet quenching
Abstract: Neutral pion transverse momentum (p(T)) spectra at midrapidity (|y| less than or similar to 0.35) were measured in Cu + Cu collisions at root s(NN) = 22.4, 62.4, and 200 GeV. Relative to pi(0) yields in p + p collisions scaled by the number of inelastic nucleon-nucleon collisions (N-coll) the pi(0) yields for p(T) greater than or similar to 2 GeV/c in central Cu + Cu collisions are suppressed at 62.4 and 200 GeV whereas an enhancement is observed at 22.4 GeV. A comparison with a jet-quenching model suggests that final state parton energy loss dominates in central Cu + Cu collisions at 62.4 and 200 GeV, while the enhancement at 22.4 GeV is consistent with nuclear modifications in the initial state alone.
Published: 2008

30. Charged hadron multiplicity fluctuations inAu+AuandCu+Cucollisions fromsNN=22.5to 200 GeV

Author: Yu. Efremenko, Martin Purschke, F. Gastineau, V. Singh, G. B. Kim, D. Kotchetkov, Mate Csanad, J. G. Boissevain, A. Morreale, B. Khachaturov, Z. Fraenkel, Alexei Khanzadeev, Masashi Kaneta, T. Matsumoto, N. Bruner, E. Stenlund, N. N. Ajitanand, David D'Enterria, Hirohiko Sato, H. Sakata, K. Katou, K. Hasuko, S. K. Tuli, R. K. Choudhury, S. S. Adler, G. S. Kyle, C. Pinkenburg, P. Tarján, Sean A. Kelly, N. Willis, R. P. Pisani, James Alexander, Tadaaki Isobe, L. Tomášek, Takahiro Nakamura, V. S. Pantuev, Hiroyuki Okada, A. Hadj Henni, R. Averbeck, J. S. Chai, Susumu Oda, Byung-Sik Hong, A. Bazilevsky, Viktor Veszpremi, Nikolay Tyurin, K. S. Sim, M. Stepanov, G. Roche, Y. J. Mao, S. Kametani, M. Harvey, Pàl Hidas, Saskia Mioduszewski, Joakim Nystrand, Eva Haslum, B. Lenzi, M. N. Wagner, J. H. Kang, Junji Tojo, Y. Watanabe, J. M. Burward-Hoy, J. S. Haggerty, T. Shohjoh, A. Durum, W. C. Smith, L. Sanfratello, K. Boyle, Wei Xie, T. V. Moukhanova, Philippe Rosnet, M. K. Lee, K. Ozawa, K. Okada, S. Belikov, K. S. Joo, P. L. McGaughey, B. Sahlmueller, H. En'yo, P. Constantin, A. Romana, Alexandre Lebedev, M. J. Leitch, Yves Roland Schutz, O. Dietzsch, K. O. Eyser, K. Fujiwara, J. L. Drachenberg, H. Hiejima, D. S. Brown, J. E. Frantz, H. Valle, C. H. Kuberg, C. Silvestre, D. M. Lee, D. Kawall, K. Dehmelt, Xiaopeng Zong, Jen-Chieh Peng, S. Afanasiev, A. Ster, J. Chiba, J. Jin, Dipanwita Dutta, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, E. M. Takagui, K. Tanida, V. I. Kochetkov, R. Pak, R. S. Towell, Y. S. Lai, Herve Borel, D. Lynch, A. Shevel, G. C. Mishra, D. E. Fields, B. D. Fox, Robert F. Hobbs, Ferenc Deák, K. Imai, Julia Velkovska, I. Garishvili, Akio Kiyomichi, Y. L. Yamaguchi, D. Sharma, B. Komkov, R. Vértesi, B. V. Jacak, J. Murata, N. Kamihara, R. Armendariz, T. Hester, Takao Sakaguchi, Kazuyoshi Kurita, Senta Greene, N. Kurihara, J. Gosset, M. Rosati, Charles Maguire, H. W. Van Hecke, J. P. Sullivan, A. Glenn, Dong Jo Kim, S. Leckey, C. Klein-Boesing, Minghui Liu, M. Velkovsky, S. Batsouli, Norio Saito, Anne Marie Sickles, S. P. Sorensen, D. Hornback, F. Matathias, M. McCumber, A. K. Purwar, A. D. Frawley, M. Heffner, C. R. Cleven, C. Haegemann, Y. Inoue, Dylan Walker, A. Drees, Gerd Joachim Kunde, J. Kubart, S. C. Johnson, M. G. Hur, C. Y. Chi, B. Azmoun, A. Král, Youngil Kwon, W. C. Chang, Kensuke Homma, I. Shein, M. A. L. Leite, M. J. Kweon, T. Tabaru, Ch. Finck, V. L. Rykov, T. Dahms, Kenneth Francis Read, Jason Newby, A. Taranenko, R. Kohara, J. Egdemir, P. J. Kroon, B. E. Norman, Y. Le Bornec, Osamu Jinnouchi, Josh Moss, E. O'Brien, Dong-Hun Kim, A. A. Vinogradov, Henrik Tydesjö, Jason Kamin, M. C. McCain, V-N. Tram, S. H. Aronson, A. Kiss, I. Ravinovich, M. Oka, V. Babintsev, J. G. Lajoie, T. Hachiya, R. A. Soltz, L. Aphecetche, Motoi Inaba, Takeo Kawabata, S. P. Stoll, Jiangyong Jia, Y. Goto, Y. Nagata, S. S.E. Rosendahl, Debashish Pal, G. Bunce, S. Sawada, G. R. Young, W. Holzmann, Z. Yasin, Henner Buesching, C. L. Woody, P. Chand, Marcus Hohlmann, Rushan Han, M. N. Hagiwara, S. Butsyk, Vladimir Samsonov, A. P.T. Palounek, C. P. Singh, B. M. Johnson, S. Esumi, A. Churyn, I. Otterlund, M. Grosse Perdekamp, Maya Hachiya Shimomura, Y. I. Makdisi, Kazushi Miki, A. Dion, E. J. Desmond, Jean-Pierre Cussonneau, M. Togawa, S. N. White, Atsushi Taketani, A. Enokizono, E. H. Kim, I. J. Choi, A. Kravitz, D. Jouan, S. Chernichenko, H. Lim, B. Bassalleck, N. Grau, K. Shoji, J. Park, Johannes Peter Wessels, Florian Bauer, M. A. Volkov, W. A. Zajc, E. Kistenev, S. S. Ryu, M. Konno, P. W. Stankus, K. Das, E. P. Hartouni, J. Ying, A. Franz, Hiroaki Ohnishi, A. Pierson, M. Ouchida, Alberto Baldisseri, A. Isupov, C. Suire, V. Baublis, A. Denisov, V. Cianciolo, H. Kobayashi, S. Bathe, Y. Tsuchimoto, M. Issah, J. M. Qualls, H. Harada, J. Asai, Sergey Fokin, C. A. Ogilvie, M. J. Tannenbaum, R. Bennett, K. Nakano, Agneta Oskarsson, T. K. Hemmick, M. D. Malik, E. Vznuzdaev, Xiao-yan Li, Jan Rak, Yasuo Miake, J. Sziklai, I. E. Yushmanov, H. Pei, T. Horaguchi, A. Hoover, Steven E. Skutnik, V. V. Ikonnikov, Y. Berdnikov, Y. Akiba, R. Lacey, M. Mishra, S. Nagamiya, Brian Cole, J. T. Mitchell, Kazuhiro Tanaka, L. Kochenda, D. Mukhopadhyay, Ahmed Al-Jamel, David Olle Rickard Silvermyr, W. E. Sondheim, M. Finger, S. Rembeczki, R. Granier de Cassagnac, Vaclav Vrba, Klaus Johannes Reygers, B. Espagnon, A. Adare, A. G. Hansen, Shingo Sakai, D. Bucher, M. Naglis, D. Winter, H. A. Gustafsson, D. Yu Peressounko, T. Kawagishi, C. L. Silva, O. Zaudtke, Tamas Ferenc Csorgo, T. L. Thomas, H. Qu, C. Zhang, R. Seidl, Xingguo Li, M. Gonin, Alexander Milov, I. Nakagawa, Vladislav Manko, V.N. Penev, P. A. Rukoyatkin, O. Drapier, Frank Ellinghaus, H. J. Kim, M. Virius, Viktor Riabov, M. Inuzuka, Hideki Hamagaki, K. Aoki, G. David, H. Pereira, Ryugo S. Hayano, M. Slunečka, S. Y. Fung, J. L. Nagle, Masayasu Ishihara, E. R. Kinney, D. P. Morrison, Y. Riabov, S. Campbell, Kenta Shigaki, Susumu Sato, V. E. Semenov, J. Zimányi, M. Nguyen, Tatsuya Chujo, M. Muniruzzaman, A. S. Nyanin, A. Deshpande, X. Camard, John Hill, K. Oyama, Y. Cobigo, C. Vale, B. S. Chang, Toru Sugitate, M. B. Deaton, L. D. Isenhower, M. Mitrovski, Christine Angela Aidala, J. Klay, I. Younus, Y. Nakamiya, Y. Tanaka, T. K. Shea, M. Wysocki, A. Soldatov, François Fleuret, B. Forestier, G. Baksay, I. V. Sourikova, H. Torii, T. Ichihara, M. T. Bjorndal, S. F. Pate, F. K. Wohn, Matthew G. Reuter, H. Al-Bataineh, X. R. Wang, F. Staley, L. Baksay, Takahiro Fusayasu, I. D. Ojha, Alexander Malakhov, V. Papavassiliou, Sébastien Gadrat, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, A. V. Kazantsev, P. Mikeš, Yoichiro Fukao, T. C. Awes, T. Liška, Jun Kikuchi, S. Yokkaichi, J. M. Heuser, M. Chiu, Ajit Kumar Mohanty, T. A. Shibata, D. Isenhower, A. Toia, L. Mašek, German Martinez, H. Kanou, A. Devismes, Taku Gunji, H. Gong, J. Seele, F. Kajihara, H. Delagrange, S. Zhou, Y. S. Kim, J. L. Charvet, T. E. Miller, E. T. Atomssa, R. Santo, P. Chung, M. Holmes, W. S. Emam, X. He, O. O. Omiwade, V. Peresedov, H. Masui, A. K. Dubey, A. A. Bickley, B. Love, Marie Germain, A. G. Litvinenko, A. Kozlov, R. Seto, K. Haruna, V. Dzhordzhadze, S. Takagi, K. N. Barish, T. J. Uam, M. L. Brooks, Tae-Yeon Lee, and I. Tserruya
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Hadron, Collision, 01 natural sciences, Bin, Ion, Nuclear physics, Superposition principle, Strange matter, 0103 physical sciences, Cluster (physics), Multiplicity (chemistry), Nuclear Experiment, 010306 general physics
Abstract: A comprehensive survey of event-by-event fluctuations of charged hadron multiplicity in relativistic heavy ions is presented. The survey covers Au+Au collisions at s(NN) =62.4 and 200 GeV, and Cu+Cu collisions at s(NN) =22.5,62.4, and 200 GeV. Fluctuations are measured as a function of collision centrality, transverse momentum range, and charge sign. After correcting for nondynamical fluctuations due to fluctuations in the collision geometry within a centrality bin, the remaining dynamical fluctuations expressed as the variance normalized by the mean tend to decrease with increasing centrality. The dynamical fluctuations are consistent with or below the expectation from a superposition of participant nucleon-nucleon collisions based upon p+p data, indicating that this dataset does not exhibit evidence of critical behavior in terms of the compressibility of the system. A comparison of the data with a model where hadrons are independently emitted from a number of hadron clusters suggests that the mean number of hadrons per cluster is small in heavy ion collisions.
Published: 2008

31. J/ψProduction insNN=200 GeVCu+CuCollisions

Author: Martin Purschke, A. Shevel, Robert F. Hobbs, D. Kotchetkov, A. Morreale, G. S. Kyle, A. Kiss, Z. Yasin, Z. Fraenkel, James Alexander, R. Averbeck, Byung-Sik Hong, T. Hester, H. Pei, Henner Buesching, C. L. Woody, A. Bazilevsky, Philippe Rosnet, M. Issah, M. D. Malik, E. Vznuzdaev, Youngil Kwon, Alexandre Lebedev, A. Hadj Henni, D. M. Lee, C. R. Cleven, C. Haegemann, Y. Inoue, V-N. Tram, K. Boyle, Debashish Pal, S. Sawada, Marcus Hohlmann, Saskia Mioduszewski, Wei Xie, E. J. Desmond, J. Chiba, A. Deshpande, Motoi Inaba, M. Togawa, J. Park, Dong-Hun Kim, E. H. Kim, Takao Sakaguchi, K. O. Eyser, A. K. Purwar, K. Fujiwara, J. Ying, A. Franz, J. Jin, E. M. Takagui, L. Tomášek, Y. J. Mao, S. P. Sorensen, K. Das, Dylan Walker, J. Egdemir, O. Dietzsch, Y. Tsuchimoto, S. Kametani, V. S. Pantuev, Jason Kamin, C. Klein-Boesing, Tadaaki Isobe, D. E. Fields, J. G. Lajoie, T. Hachiya, L. Aphecetche, C. P. Singh, B. M. Johnson, E. P. Hartouni, S. P. Stoll, H. Valle, Johannes Peter Wessels, I. E. Yushmanov, B. V. Jacak, A. D. Frawley, T. Tabaru, Junji Tojo, J. H. Kang, J. S. Haggerty, A. Romana, S. S.E. Rosendahl, G. Bunce, N. Grau, Mate Csanad, K. Shoji, I. J. Choi, A. Kravitz, M. Gonin, A. Isupov, C. Suire, Hiroyuki Okada, A. Churyn, D. Lynch, Julia Velkovska, Eva Haslum, B. Lenzi, R. Vértesi, S. H. Aronson, K. Okada, B. Sahlmueller, D. Jouan, I. Younus, J. Sziklai, P. L. McGaughey, M. McCumber, H. En'yo, M. J. Leitch, Charles Maguire, H. W. Van Hecke, P. W. Stankus, H. Pereira, X. He, O. O. Omiwade, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, M. Mitrovski, Andry Malala Rakotozafindrabe, K. S. Joo, V. L. Rykov, T. Dahms, M. Rosati, Y. Nakamiya, W. Holzmann, M. Chiu, Brian Cole, David D'Enterria, V. Peresedov, Y. L. Yamaguchi, A. Soldatov, S. Bathe, B. Komkov, Hiroaki Ohnishi, Agneta Oskarsson, M. Wysocki, S. Afanasiev, Maya Hachiya Shimomura, A. Ster, A. A. Vinogradov, S. Esumi, Y. S. Lai, J. E. Frantz, Alexander Milov, I. Nakagawa, R. S. Towell, E. Kistenev, Jiangyong Jia, I. Garishvili, Akio Kiyomichi, P. Tarján, M. N. Wagner, Norio Saito, Y. Berdnikov, Y. Akiba, M. A. L. Leite, J. Newby, M. Mishra, S. Nagamiya, Alexei Khanzadeev, O. Drapier, Frank Ellinghaus, G. Baksay, I. Ravinovich, Y. Goto, Y. I. Makdisi, Steven E. Skutnik, E. Stenlund, Y. Nagata, E. R. Kinney, N. Kurihara, D. P. Morrison, W. A. Zajc, N. N. Ajitanand, H. Sakata, Vaclav Vrba, Klaus Johannes Reygers, D. Hornback, C. A. Ogilvie, H. Harada, T. K. Hemmick, S. Campbell, Yasuo Miake, Roy A. Lacey, Rushan Han, V. E. Semenov, M. Naglis, M. Heffner, J. G. Boissevain, A. Taranenko, J. Zimányi, Masashi Kaneta, C. Y. Chi, M. K. Lee, Tatsuya Chujo, K. Ozawa, K. Dehmelt, S. Batsouli, V. Baublis, A. Denisov, Takahiro Nakamura, Xingguo Li, H. Masui, A. K. Dubey, V. Babintsev, Jen-Chieh Peng, T. Ichihara, V. Cianciolo, L. Kochenda, C. L. Silva, H. Qu, J. T. Mitchell, S. F. Pate, R. Bennett, M. Finger, M. J. Tannenbaum, Kazushi Miki, H. Al-Bataineh, S. Butsyk, A. A. Bickley, M. B. Deaton, Vladimir Samsonov, C. Pinkenburg, Sergey Fokin, T. V. Moukhanova, O. Zaudtke, Y. Tanaka, Minghui Liu, Dong Jo Kim, Susumu Oda, Hideki Hamagaki, K. Aoki, R. Pak, Osamu Jinnouchi, G. David, N. Kamihara, X. R. Wang, Masayasu Ishihara, R. Armendariz, B. Love, M. Virius, D. Mukhopadhyay, S. Rembeczki, M. Stepanov, G. Roche, T. Horaguchi, Susumu Sato, A. Durum, R. Seidl, Kazuyoshi Kurita, Vladislav Manko, M. Slunečka, I. Tserruya, Yu. Efremenko, S. Belikov, A. Drees, V. Singh, V. Papavassiliou, J. Kubart, Sébastien Gadrat, J. Gosset, Catherine Micaela Silvestre, A. Glenn, Tamas Ferenc Csorgo, Kenneth Francis Read, F. Staley, I. V. Sourikova, A. G. Litvinenko, D. Kawall, J. L. Nagle, K. Tanida, Senta Greene, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, V. I. Kochetkov, S. Yokkaichi, H. A. Gustafsson, B. E. Norman, J. Murata, M. Ouchida, E. O'Brien, A. Kozlov, R. A. Soltz, H. Borel, J. Asai, Matthew G. Reuter, F. Matathias, Kensuke Homma, Gerd Joachim Kunde, A. V. Kazantsev, R. Seto, M. Grosse Perdekamp, Shingo Sakai, I. Shein, L. Baksay, T. L. Thomas, Takahiro Fusayasu, C. Zhang, Ryugo S. Hayano, P. Constantin, S. Chernichenko, K. Haruna, B. Bassalleck, Y. Riabov, M. Konno, Kenta Shigaki, P. Mikeš, M. Nguyen, A. S. Nyanin, Yoichiro Fukao, Viktor Riabov, T. C. Awes, T. Liška, S. Takagi, D. Winter, D. Yu Peressounko, Jun Kikuchi, K. N. Barish, A. P.T. Palounek, M. L. Brooks, Alexander Malakhov, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, John Hill, H. A. Torii, Toru Sugitate, L. D. Isenhower, François Fleuret, S. N. White, D. Sharma, B. Azmoun, A. Král, M. J. Kweon, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, Anne Marie Sickles, G. R. Young, Jan Rak, R. Granier de Cassagnac, A. Adare, K. S. Sim, V. Dzhordzhadze, Y. Watanabe, H. Hiejima, K. Imai, T. A. Shibata, D. Isenhower, A. Toia, L. Mašek, J. L. Charvet, T. E. Miller, E. T. Atomssa, P. Chung, W. S. Emam, H. Kanou, Taku Gunji, H. Gong, J. Seele, F. Kajihara, H. Delagrange, S. Zhou, A. Baldisseri, K. Nakano, W. E. Sondheim, P. A. Rukoyatkin, and Tae-Yeon Lee
Subjects: Physics, Range (particle radiation), Quantitative Biology::Neurons and Cognition, 010308 nuclear & particles physics, Analytical chemistry, General Physics and Astronomy, chemistry.chemical_element, Plasma, Nuclear matter, 7. Clean energy, 01 natural sciences, Copper, Strange matter, chemistry, 0103 physical sciences, Energy density, High Energy Physics::Experiment, Rapidity, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: Yields for J/psi production in Cu+Cu collisions at root s(NN) = 200 GeV have been measured over the rapidity range |y|< 2.2 and compared with results in p+p and Au+Au collisions at the same energy. The Cu+Cu data offer greatly improved precision over existing Au+Au data for J/psi production in collisions with small to intermediate numbers of participants, in the range where the quark-gluon plasma transition threshold is predicted to lie. Cold nuclear matter estimates based on ad hoc fits to d+Au data describe the Cu+Cu data up to N-part similar to 50, corresponding to a Bjorken energy density of at least 1.5 GeV/fm(3).
Published: 2008

32. Dihadron azimuthal correlations in Au+Au collisions atsNN=200GeV

Author: S. Afanasiev, J. L. Drachenberg, B. Love, A. Ster, R. A. Soltz, I. Ravinovich, Y. Nagata, T. Ichihara, Marie Germain, S. P. Sorensen, Dylan Walker, C. Silvestre, A. G. Litvinenko, Tae-Yeon Lee, C. R. Cleven, C. Haegemann, Y. Inoue, N. Grau, P. J. Kroon, Dong-Hun Kim, M. Issah, S. S. Ryu, Marisilvia Donadelli, K. Shoji, Martin Purschke, Matthew G. Reuter, M. D. Malik, A. Deshpande, F. Gastineau, Takahiro Fusayasu, E. Vznuzdaev, J. G. Lajoie, P. W. Stankus, E. H. Kim, T. Hachiya, M. Grosse Perdekamp, V. Bumazhnov, M. P. Comets, A. Kozlov, R. Seto, K. Haruna, D. Hornback, I. J. Choi, A. Kravitz, R. Bennett, I. D. Ojha, Alexander Malakhov, Maya Hachiya Shimomura, Andry Malala Rakotozafindrabe, D. Kotchetkov, V. Dzhordzhadze, M. Heffner, Charles Maguire, S. Leckey, Steven E. Skutnik, A. Morreale, Tadaaki Isobe, Ahmed Al-Jamel, Y. I. Makdisi, M. Finger, X. He, Z. Fraenkel, J. S. Chai, A. Hadj Henni, O. O. Omiwade, H. A. Gustafsson, H. Qu, M. Gonin, A. Taranenko, Josh Moss, Y. Watanabe, V. S. Pantuev, Hideki Hamagaki, K. Aoki, Kazushi Miki, G. David, V. Peresedov, O. Dietzsch, D. Silvermyr, K. Boyle, Wei Xie, C. L. Woody, J. E. Frantz, Xiao-yan Li, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, H. Valle, I. Younus, C. Zhang, B. Azmoun, E. Kistenev, H. Pereira, M. Harvey, A. Král, M. J. Kweon, S. Kelly, J. Gosset, L. S. Zolin, D. Winter, W. J. Park, D. Yu Peressounko, P. L. McGaughey, N. N. Ajitanand, H. Masui, A. K. Dubey, A. Soldatov, O. Drapier, Frank Ellinghaus, Y. Le Bornec, E. R. Kinney, Herve Borel, D. Lynch, Junji Tojo, P. Tarján, D. P. Morrison, M. Mitrovski, K. Hasuko, J. P. Sullivan, P. D. Barnes, Hiroaki Ohnishi, A. Yanovich, S. Campbell, Viktor Riabov, Julia Velkovska, A. Glenn, H. Harada, A. A. Bickley, S. Y. Fung, Hiroyuki Okada, G. S. Kyle, C. P. Singh, V. E. Semenov, M. Oka, K. Okada, N. Willis, James Alexander, M. Naglis, J. Zimányi, M. Rosati, Alexei Khanzadeev, B. Sahlmueller, S. Batsouli, V. L. Rykov, T. Dahms, M. B. Deaton, Joakim Nystrand, C. L. Silva, Eva Haslum, B. Lenzi, Tatsuya Chujo, K. Dehmelt, A. Dion, Jen-Chieh Peng, S. Takagi, H. En'yo, P. Constantin, R. Averbeck, Byung-Sik Hong, M. Wysocki, M. J. Tannenbaum, A. Bazilevsky, M. J. Leitch, L. Aphecetche, Y. Tanaka, L. Tomáek, Takahiro Nakamura, K. N. Barish, Bruno Espagnon, I. V. Sourikova, E. Stenlund, Masayasu Ishihara, H. Sakata, B. M. Johnson, John Hill, O. Zaudtke, Atsushi Taketani, A. Enokizono, M. C. McCain, Susumu Sato, T. L. Thomas, A. A. Vinogradov, Henrik Tydesjö, T. K. Shea, Roy A. Lacey, Xiong Wang, J. M. Burward-Hoy, S. F. Pate, Philippe Rosnet, K. Das, Jiangyong Jia, Y. Goto, H. A. Torii, Alexandre Lebedev, Toru Sugitate, S. Belikov, K. S. Joo, Rushan Han, L. D. Isenhower, D. Kawall, Senta Greene, K. Tanida, M. Virius, Dong Jo Kim, Osamu Jinnouchi, A. P.T. Palounek, Susumu Oda, Ryugo S. Hayano, Xingguo Li, E. P. Hartouni, F. Staley, L. Baksay, H. Al-Bataineh, A. Isupov, V. I. Kochetkov, D. M. Lee, Y. Riabov, M. L. Brooks, S. Yokkaichi, M. N. Hagiwara, J. M. Heuser, W. C. Smith, Kenta Shigaki, I. Tserruya, S. Esumi, T. Shohjoh, Yu. Efremenko, V. Singh, M. Nguyen, S. Butsyk, A. Durum, J. Murata, François Fleuret, D. Mukhopadhyay, B. Forestier, S. Rembeczki, Y. J. Mao, Minghui Liu, S. Kametani, Y. L. Yamaguchi, J. Sziklai, B. Komkov, W. A. Zajc, Johannes Peter Wessels, Gerd Joachim Kunde, Y. Cobigo, A. S. Nyanin, M. K. Lee, Brian Cole, V. Papavassiliou, Sébastien Gadrat, I. Shein, V. Baublis, A. Denisov, V. Cianciolo, B. E. Norman, Vladimir Samsonov, I. Otterlund, S. N. White, D. Sharma, J. H. Kang, E. O'Brien, Norio Saito, J. S. Haggerty, D. S. Brown, M. A. L. Leite, Hirohiko Sato, Robert F. Hobbs, A. Romana, S. K. Tuli, R. S. Towell, I. Garishvili, Akio Kiyomichi, Sergey Fokin, D. Bucher, Kenneth Francis Read, T. Horaguchi, Alberto Baldisseri, T. V. Moukhanova, Debashish Pal, N. Kurihara, S. Sawada, A. V. Kazantsev, J. Ying, A. Franz, M. Ouchida, J. Asai, D. E. Fields, J. Chiba, B. V. Jacak, V. Babintsev, E. J. Desmond, M. Togawa, J. Park, P. Mikeš, Y. S. Lai, Yoichiro Fukao, Shingo Sakai, M. G. Hur, C. Y. Chi, M. McCumber, A. K. Purwar, G. C. Mishra, T. C. Awes, Kyoichiro Ozawa, T. Liška, Florian Bauer, Jun Kikuchi, Y. Tsuchimoto, Takao Sakaguchi, J. G. Boissevain, Masashi Kaneta, Tamas Ferenc Csorgo, C. Klein-Boesing, Jan Rak, C. Pinkenburg, A. D. Frawley, T. Tabaru, I. E. Yushmanov, M. Stepanov, G. Roche, S. H. Aronson, Saskia Mioduszewski, W. Holzmann, J. L. Nagle, R. Vértesi, Jason Newby, J. Jin, E. M. Takagui, R. Granier de Cassagnac, A. Adare, Anne Marie Sickles, G. R. Young, K. S. Sim, Y. Kwon, H. Hiejima, K. Imai, J. T. Mitchell, Mate Csanad, R. Seidl, Vladislav Manko, M. Slunečka, M. Chiu, T. A. Shibata, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, Y. Nakamiya, G. Baksay, M. T. Bjorndal, David D'Enterria, F. Matathias, Kensuke Homma, S. Chernichenko, H. Lim, B. Bassalleck, R. P. Pisani, D. Isenhower, A. Toia, M. Konno, Nikolay Tyurin, L. Mašek, M. N. Wagner, A. Shevel, T. Hester, V-N. Tram, Motoi Inaba, H. Kanou, Taku Gunji, H. Gong, J. Seele, A. Kiss, F. Kajihara, Z. Yasin, H. Delagrange, Henner Buesching, S. Zhou, Marcus Hohlmann, Y. S. Kim, J. L. Charvet, S. Bathe, Agneta Oskarsson, T. E. Miller, Y. Berdnikov, E. T. Atomssa, Y. Akiba, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, P. Chung, Vaclav Vrba, Klaus Johannes Reygers, M. Holmes, W. S. Emam, K. O. Eyser, K. Fujiwara, H. W. Van Hecke, C. A. Ogilvie, T. K. Hemmick, Yasuo Miake, L. Kochenda, T. Kawagishi, R. Pak, N. Kamihara, R. Armendariz, Kazuyoshi Kurita, A. Drees, J. Kubart, J. Egdemir, Jason Kamin, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, A. Churyn, D. Jouan, K. Nakano, W. E. Sondheim, P. A. Rukoyatkin, and H. Pei
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Posterior region, Hadron, Elliptic flow, 01 natural sciences, Spectral line, Nuclear physics, Azimuth, Shoulder region, 0103 physical sciences, Transverse momentum, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, Jet quenching
Abstract: Azimuthal angle (Delta phi) correlations are presented for a broad range of transverse momentum (0.4 < p(T) < 10 GeV/c) and centrality (0-92%) selections for charged hadrons from dijets in Au+Au collisions at root s(NN) = 200 GeV. With increasing p(T), the away-side Delta phi distribution evolves from a broad and relatively flat shape to a concave shape, then to a convex shape. Comparisons with p + p data suggest that the away-side distribution can be divided into a partially suppressed "head" region centered at Delta phi similar to pi, and an enhanced "shoulder" region centered at Delta phi similar to pi +/- 1.1. The p(T) spectrum for the associated hadrons in the head region softens toward central collisions. The spectral slope for the shoulder region is independent of centrality and trigger p(T). The properties of the near-side distributions are also modified relative to those in p + p collisions, reflected by the broadening of the jet shape in Delta phi and Delta eta, and an enhancement of the per-trigger yield. However, these modifications seem to be limited to p(T)less than or similar to 4 GeV/c, above which both the hadron pair shape and per-trigger yield become similar to p + p collisions. These observations suggest that both the away- and near-side distributions contain a jet fragmentation component which dominates for p(T) greater than or similar to 5 GeV/c and a medium-induced component which is important for p(T) less than or similar to 4 GeV/c. We also quantify the role of jets at intermediate and low p(T) through the yield of jet-induced pairs in comparison with binary scaled p + p pair yield. The yield of jet-induced pairs is suppressed at high pair proxy energy (sum of the p(T) magnitudes of the two hadrons) and is enhanced at low pair proxy energy. The former is consistent with jet quenching; the latter is consistent with the enhancement of soft hadron pairs due to transport of lost energy to lower p(T).
Published: 2008

33. Quantitative constraints on the transport properties of hot partonic matter from semi-inclusive single high transverse momentum pion suppression in Au+Au collisions atsNN=200GeV

Author: M. Issah, M. D. Malik, E. Vznuzdaev, A. Hadj Henni, K. Boyle, Wei Xie, L. Aphecetche, Johannes Peter Wessels, P. Tarján, Senta Greene, Youngil Kwon, M. Groose Perdekamp, A. V. Kazantsev, H. Kanou, Taku Gunji, H. Gong, J. Seele, B. E. Norman, E. O'Brien, R. A. Soltz, P. Mikeš, F. Kajihara, H. Delagrange, Yoichiro Fukao, K. Das, J. Chiba, T. C. Awes, T. Liška, Jun Kikuchi, E. P. Hartouni, Y. L. Yamaguchi, H. Pei, G. C. Mishra, Tadaaki Isobe, J. S. Chai, S. Zhou, B. Komkov, Takao Sakaguchi, C. Klein-Boesing, M. Rosati, M. Gonin, P. L. McGaughey, Norio Saito, M. A. L. Leite, A. D. Frawley, T. Tabaru, S. Afanasiev, A. Ster, Y. S. Kim, D. Winter, S. H. Aronson, D. Yu Peressounko, M. Chiu, T. A. Shibata, H. Pereira, A. A. Vinogradov, Henrik Tydesjö, J. M. Burward-Hoy, W. Holzmann, Maya Hachiya Shimomura, Y. I. Makdisi, D. Hornback, Jiangyong Jia, Y. Goto, A. Kiss, Z. Yasin, Henner Buesching, C. L. Woody, R. S. Towell, J. G. Boissevain, M. Naglis, M. Heffner, V. Babintsev, Minghui Liu, C. L. Silva, Masashi Kaneta, I. Garishvili, Akio Kiyomichi, M. J. Tannenbaum, G. S. Kyle, A. Taranenko, D. Isenhower, J. L. Drachenberg, I. Ravinovich, N. Willis, James Alexander, A. Toia, Masayasu Ishihara, N. Kurihara, M. B. Deaton, C. Pinkenburg, W. C. Smith, L. Mašek, D. Mukhopadhyay, Kazushi Miki, S. Rembeczki, Marcus Hohlmann, R. Greiner De Cassagnac, S. P. Sorensen, Susumu Sato, Dylan Walker, H. A. Gustafsson, D. Bucher, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, M. Stepanov, G. Roche, Y. J. Mao, Y. Tanaka, Kenneth Francis Read, J. L. Charvet, Philippe Rosnet, M. G. Hur, C. Y. Chi, S. Kametani, D. Kawall, C. Zhang, T. L. Thomas, T. K. Shea, Anne Marie Sickles, Alexandre Lebedev, K. Tanida, M. K. Lee, K. Ozawa, J. H. Kang, S. Bathe, V. I. Kochetkov, Y. Nagata, J. G. Lajoie, D. M. Lee, K. Hasuko, T. E. Miller, E. T. Atomssa, Agneta Oskarsson, T. Hachiya, J. S. Haggerty, A. Romana, C. P. Singh, J. Murata, Viktor Riabov, B. M. Johnson, L. Tomášek, Y. Berdnikov, Gerd Joachim Kunde, G. R. Young, P. Chung, I. J. Choi, J. Imrek, A. Kravitz, Hiroyuki Okada, Hiroaki Ohnishi, S. Batsouli, Y. Akiba, A. Isupov, C. Suire, V. S. Pantuev, I. Shein, M. Holmes, M. Mishra, S. Nagamiya, Joakim Nystrand, Kazuhiro Tanaka, Ryugo S. Hayano, J. Sziklai, M. Harvey, W. S. Emam, E. H. Kim, F. Staley, L. Baksay, Brian Cole, Eva Haslum, B. Lenzi, S. S. Ryu, Jan Rak, Vaclav Vrba, O. Dietzsch, H. Valle, Klaus Johannes Reygers, Y. S. Lai, T. Ichihara, Alberto Baldisseri, A. Deshpande, M. C. McCain, Junji Tojo, Y. Riabov, Matthew G. Reuter, J. Gosset, Charles Maguire, A. Adare, Saskia Mioduszewski, S. Leckey, A. P.T. Palounek, Takahiro Fusayasu, J. P. Sullivan, K. O. Eyser, K. Fujiwara, I. D. Ojha, Alexander Malakhov, K. Okada, S. Esumi, B. Sahlmueller, Kenta Shigaki, Josh Moss, M. Nguyen, D. Silvermyr, H. En'yo, W. A. Zajc, Xingguo Li, P. Constantin, M. J. Leitch, I. Younus, E. Kistenev, Julia Velkovska, L. S. Zolin, W. J. Park, V. Baublis, A. Denisov, V. Cianciolo, M. Mitrovski, J. Jin, E. M. Takagui, Mate Csanad, A. Soldatov, Sergey Fokin, P. D. Barnes, A. Yanovich, H. W. Van Hecke, R. Bennett, T. Horaguchi, H. Harada, S. N. White, Tae-Yeon Lee, K. S. Sim, Y. Watanabe, Xiao-yan Li, A. S. Nyanin, K. Nakano, S. Yokkaichi, J. M. Heuser, W. E. Sondheim, M. Wysocki, P. A. Rukoyatkin, S. Y. Fung, Martin Purschke, Ahmed Al-Jamel, F. Gastineau, John Hill, H. A. Torii, Toru Sugitate, L. D. Isenhower, E. J. Desmond, F. Matathias, M. Finger, Kensuke Homma, David D'Enterria, François Fleuret, B. Forestier, J. E. Frantz, M. Togawa, H. Hiejima, Robert F. Hobbs, S. Chernichenko, J. Park, H. Lim, Florian Bauer, B. Bassalleck, R. P. Pisani, M. Konno, D. Kotchetkov, Y. Tsuchimoto, Y. Nakamiya, Debashish Pal, G. Baksay, K. Imai, A. Morreale, Nikolay Tyurin, S. Sawada, M. T. Bjorndal, I. E. Yushmanov, Herve Borel, D. Lynch, J. Ying, A. Franz, Z. Fraenkel, M. N. Wagner, R. Vértesi, J. T. Mitchell, A. Glenn, A. Shevel, S. Butsyk, R. Seidl, B. Espagnon, Vladislav Manko, X. He, M. Slunečka, T. Hester, S. F. Pate, Vladimir Samsonov, B. Azmoun, A. Král, M. J. Kweon, I. Otterlund, O. O. Omiwade, V. L. Rykov, T. Dahms, Jason Newby, H. Al-Bataineh, X. R. Wang, Y. Le Bornec, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, V-N. Tram, Tamas Ferenc Csorgo, Alexei Khanzadeev, E. Stenlund, O. Zaudtke, I. V. Sourikova, J. L. Nagle, H. Sakata, Motoi Inaba, V. Papavassiliou, M. Oka, Sébastien Gadrat, V. Peresedov, M. Virius, A. Dion, C. Silvestre, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, T. V. Moukhanova, M. Ouchida, Atsushi Taketani, A. Enokizono, Y. Cobigo, S. Belikov, K. S. Joo, J. Asai, Shingo Sakai, Roy A. Lacey, Rushan Han, M. N. Hagiwara, D. Sharma, H. Masui, A. K. Dubey, A. A. Bickley, S. Takagi, K. N. Barish, D. E. Fields, B. V. Jacak, M. McCumber, A. K. Purwar, M. L. Brooks, S. Kelly, Alexander Milov, N. N. Ajitanand, I. Nakagawa, B. Love, O. Drapier, Frank Ellinghaus, Takahiro Nakamura, Marie Germain, Susumu Oda, E. R. Kinney, T. Shohjoh, A. Durum, D. P. Morrison, S. Campbell, D. S. Brown, V. E. Semenov, A. G. Litvinenko, J. Zimányi, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, V. Singh, Hirohiko Sato, S. K. Tuli, K. Dehmelt, Jen-Chieh Peng, Dong Jo Kim, Osamu Jinnouchi, A. Kozlov, R. Seto, K. Haruna, V. Dzhordzhadze, R. Pak, N. Kamihara, R. Armendariz, Kazuyoshi Kurita, A. Drees, J. Kubart, J. Egdemir, C. R. Cleven, Jason Kamin, C. Haegemann, Y. Inoue, S. P. Stoll, P. J. Kroon, Dong-Hun Kim, S. S.E. Rosendahl, G. Bunce, Steven E. Skutnik, A. Churyn, D. Jouan, H. Qu, Hideki Hamagaki, K. Aoki, G. David, C. A. Ogilvie, T. K. Hemmick, Yasuo Miake, N. Grau, K. Shoji, L. Kochenda, P. W. Stankus, and T. Kawagishi
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Opacity, 010308 nuclear & particles physics, Transport coefficient, Charge density, Parton, 01 natural sciences, Standard deviation, Nuclear physics, Pion, 0103 physical sciences, Transverse momentum, Nuclear Experiment, 010306 general physics
Abstract: The PHENIX experiment has measured the suppression of semi-inclusive single high-transverse-momentum pi(0)'s in Au+Au collisions at root s(NN) = 200 GeV. The present understanding of this suppression is in terms of energy loss of the parent (fragmenting) parton in a dense color-charge medium. We have performed a quantitative comparison between various parton energy-loss models and our experimental data. The statistical point-to-point uncorrelated as well as correlated systematic uncertainties are taken into account in the comparison. We detail this methodology and the resulting constraint on the model parameters, such as the initial color-charge density dN(g)/dy, the medium transport coefficient , or the initial energy-loss parameter epsilon(0). We find that high-transverse-momentum pi(0) suppression in Au+Au collisions has sufficient precision to constrain these model-dependent parameters at the +/- 20-25% (one standard deviation) level. These constraints include only the experimental uncertainties, and further studies are needed to compute the corresponding theoretical uncertainties.
Published: 2008

34. Source Breakup Dynamics inAu+AuCollisions atsNN=200 GeVvia Three-Dimensional Two-Pion Source Imaging

Author: K. Boyle, Wei Xie, I. Ravinovich, M. Rosati, Mate Csanad, Steven E. Skutnik, R. Vértesi, A. Kiss, Robert F. Hobbs, E. H. Kim, Henner Buesching, C. L. Woody, K. S. Sim, I. Tserruya, Marie Germain, Bruno Espagnon, A. A. Vinogradov, Henrik Tydesjö, R. S. Towell, H. Qu, R. A. Soltz, J. Chiba, Martin Purschke, F. Gastineau, Akio Kiyomichi, Y. Nagata, Hideki Hamagaki, K. Aoki, G. David, Jiangyong Jia, Y. Goto, M. Chiu, Y. Tanaka, T. K. Shea, Y. Watanabe, Yu. Efremenko, V. Singh, T. Ichihara, Matthew G. Reuter, K. Hasuko, A. G. Litvinenko, T. A. Shibata, G. C. Mishra, H. A. Gustafsson, N. Kurihara, S. S. Ryu, Youngil Kwon, I. D. Ojha, D. Kotchetkov, Alexander Malakhov, Debashish Pal, M. Grosse Perdekamp, H. Hiejima, David D'Enterria, C. Zhang, Takao Sakaguchi, M. G. Hur, C. Y. Chi, Kensuke Homma, C. R. Cleven, C. Klein-Boesing, S. Sawada, A. Kozlov, D. Silvermyr, M. Naglis, S. Bathe, Agneta Oskarsson, S. Chernichenko, R. Seto, Hiroyuki Okada, C. L. Silva, D. Isenhower, L. S. Zolin, Jason Newby, H. Lim, K. Haruna, R. Bennett, Y. Berdnikov, R. P. Pisani, A. D. Frawley, S. Kelly, P. J. Kroon, T. Tabaru, N. N. Ajitanand, W. J. Park, Y. Akiba, K. Imai, A. Franz, C. P. Singh, V. S. Pantuev, F. Staley, B. Bassalleck, S. Nagamiya, Kazuhiro Tanaka, Joakim Nystrand, B. M. Johnson, Charles Maguire, Ahmed Al-Jamel, V. Dzhordzhadze, Z. Fraenkel, M. Konno, Klaus Johannes Reygers, Nikolay Tyurin, Eva Haslum, M. Harvey, B. Komkov, A. Isupov, S. Leckey, Takahiro Nakamura, O. Dietzsch, Hirohiko Sato, S. K. Tuli, X. He, O. O. Omiwade, K. Das, J. E. Frantz, N. Grau, Jan Rak, M. N. Wagner, P. D. Barnes, A. Yanovich, Junji Tojo, Viktor Riabov, J. Sziklai, K. Shoji, Taku Gunji, J. T. Mitchell, H. Valle, Josh Moss, Masayasu Ishihara, E. P. Hartouni, E. J. Desmond, S. H. Aronson, Brian Cole, Norio Saito, M. A. L. Leite, V. Peresedov, T. Shohjoh, A. Durum, S. N. White, Vladislav Manko, R. Granier de Cassagnac, F. Kajihara, Jen-Chieh Peng, K. Okada, M. Togawa, E. Kistenev, Julia Velkovska, Herve Borel, Susumu Sato, P. W. Stankus, J. Park, S. Afanasiev, B. Sahlmueller, H. En'yo, Saskia Mioduszewski, H. Delagrange, P. Constantin, D. S. Brown, W. Holzmann, S. Batsouli, A. Glenn, M. Gonin, Florian Bauer, A. Ster, M. J. Leitch, D. Winter, D. Yu Peressounko, S. Belikov, K. S. Joo, Maya Hachiya Shimomura, P. Tarján, J. M. Burward-Hoy, H. Masui, A. K. Dubey, V. Babintsev, V. L. Rykov, T. Dahms, D. E. Fields, H. Harada, H. W. Van Hecke, K. Tanida, J. Jin, G. S. Kyle, Y. I. Makdisi, Y. Tsuchimoto, B. V. Jacak, H. Pei, V. I. Kochetkov, Dong Jo Kim, E. M. Takagui, S. Takagi, N. Willis, James Alexander, M. C. McCain, W. E. Sondheim, Osamu Jinnouchi, H. Pereira, N. Kamihara, Y. S. Kim, V-N. Tram, W. C. Smith, K. N. Barish, R. Averbeck, O. Zaudtke, I. E. Yushmanov, A. K. Purwar, F. Matathias, J. Murata, Byung-Sik Hong, R. Armendariz, A. Bazilevsky, M. Wysocki, A. P.T. Palounek, M. K. Lee, K. Ozawa, Kazuyoshi Kurita, P. A. Rukoyatkin, M. Heffner, S. Y. Fung, C. Vale, Gerd Joachim Kunde, Philippe Rosnet, Alexei Khanzadeev, Motoi Inaba, A. Drees, J. L. Drachenberg, Christophe Pierre Suire, Alexander Milov, Senta Greene, T. E. Miller, Christine Angela Aidala, A. Taranenko, A. Enokizono, S. Esumi, S. P. Sorensen, E. Stenlund, M. J. Tannenbaum, Alexandre Lebedev, D. M. Lee, I. Shein, O. Drapier, D. Sharma, B. E. Norman, P. Chung, John Hill, W. A. Zajc, Y. Cobigo, M. Holmes, E. R. Kinney, D. P. Morrison, E. O'Brien, H. A. Torii, Alberto Baldisseri, A. Deshpande, M. L. Brooks, Anne Marie Sickles, S. F. Pate, V. Baublis, S. Campbell, B. Azmoun, Toru Sugitate, D. Mukhopadhyay, L. D. Isenhower, A. Denisov, V. Cianciolo, C. A. Ogilvie, V. E. Semenov, J. Zimányi, D. Bucher, M. J. Kweon, Sergey Fokin, T. K. Hemmick, Tatsuya Chujo, Yasuo Miake, J. G. Lajoie, T. Hachiya, M. T. Bjorndal, Y. Le Bornec, T. V. Moukhanova, François Fleuret, B. Forestier, X. R. Wang, T. Horaguchi, L. Kochenda, I. J. Choi, Hiroaki Ohnishi, T. Kawagishi, J. Egdemir, I. Younus, S. P. Stoll, V. Papavassiliou, Sébastien Gadrat, S. S.E. Rosendahl, G. Bunce, G. R. Young, D. Jouan, A. Soldatov, Xingguo Li, A. Dion, Atsushi Taketani, T. L. Thomas, Ryugo S. Hayano, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, I. V. Sourikova, Shingo Sakai, S. Kametani, J. H. Kang, J. S. Haggerty, A. Romana, M. Issah, M. D. Malik, E. Vznuzdaev, L. Aphecetche, J. G. Boissevain, Masashi Kaneta, Johannes Peter Wessels, C. Pinkenburg, M. Stepanov, G. Roche, J. Gosset, J. P. Sullivan, S. Yokkaichi, J. M. Heuser, Tadaaki Isobe, S. Butsyk, J. S. Chai, Vladimir Samsonov, P. L. McGaughey, I. Otterlund, A. V. Kazantsev, Yoichiro Fukao, T. C. Awes, Tamas Ferenc Csorgo, Minghui Liu, J. L. Nagle, Kenneth Francis Read, V. Bumazhnov, M. P. Comets, Roy A. Lacey, M. N. Hagiwara, and A. Hadj Henni
Subjects: Source function, Physics, Range (particle radiation), 010308 nuclear & particles physics, Dynamics (mechanics), General Physics and Astronomy, Breakup, 01 natural sciences, Nuclear physics, Correlation function (statistical mechanics), Pion, 0103 physical sciences, Transverse momentum, Atomic physics, Nuclear Experiment, 010306 general physics, Beam (structure)
Abstract: A three-dimensional correlation function obtained from midrapidity, low p(T), pion pairs in central Au+Au collisions at root s(NN) = 200 GeV is studied. The extracted model-independent source function indicates a long range tail in the directions of the pion pair transverse momentum (out) and the beam (long). A proper breakup time tau(0) similar to 9 fm/c and a mean proper emission duration Delta tau similar to 2 fm/c, leading to sizable emission time differences ( approximate to 12 fm/c), are required to allow models to be successfully matched to these tails. The model comparisons also suggest an outside-in "burning" of the emission source reminiscent of many hydrodynamical models.
Published: 2008

35. Cold nuclear matter effects onJ/ψproduction as constrained by deuteron-gold measurements atsNN=200GeV

Author: V. I. Kochetkov, B. Khachaturov, S. C. Johnson, T. Matsumoto, J. Murata, B. Azmoun, A. Král, M. J. Kweon, K. Hasuko, M. Gonin, A. Shevel, Gerd Joachim Kunde, T. L. Thomas, V.N. Penev, T. Hester, Hiroyuki Okada, Y. Le Bornec, S. Esumi, Joakim Nystrand, Eva Haslum, B. Lenzi, M. Oka, I. Shein, R. A. Soltz, H. Borel, J. E. Frantz, C. H. Kuberg, J. Chiba, J. Gosset, J. P. Sullivan, H. Pereira, A. Dion, Ryugo S. Hayano, M. Grosse Perdekamp, J. M. Burward-Hoy, J. L. Charvet, Tae-Yeon Lee, Martin Purschke, W. A. Zajc, D. Kotchetkov, V-N. Tram, G. C. Mishra, A. Morreale, Z. Fraenkel, Atsushi Taketani, A. Enokizono, Y. Riabov, R. K. Choudhury, Kenta Shigaki, D. Lynch, M. Nguyen, A. Pierson, V. Baublis, K. S. Joo, A. Deshpande, L. Sanfratello, M. B. Deaton, A. Denisov, S. Afanasiev, A. Ster, E. H. Kim, A. S. Nyanin, M. K. Lee, K. Ozawa, T. E. Miller, E. T. Atomssa, Hiroaki Ohnishi, V. Cianciolo, Motoi Inaba, A. Glenn, D. Sharma, Takao Sakaguchi, C. Klein-Boesing, Minghui Liu, B. D. Fox, R. Santo, David Olle Rickard Silvermyr, Sergey Fokin, L. Tomášek, Mate Csanad, V. S. Pantuev, J. M. Qualls, P. Chung, A. D. Frawley, S. Butsyk, X. He, M. Harvey, O. O. Omiwade, Kenneth Francis Read, Y. Tanaka, Vladimir Samsonov, T. Horaguchi, I. Otterlund, Junji Tojo, T. Tabaru, A. Hoover, V. L. Rykov, T. Dahms, S. Yokkaichi, Youngil Kwon, I. Younus, J. M. Heuser, D. Winter, K. Okada, V. Peresedov, E. J. Desmond, D. Yu Peressounko, T. K. Shea, W. S. Emam, Jean-Pierre Cussonneau, B. Sahlmueller, H. En'yo, David D'Enterria, S. H. Aronson, S. Batsouli, P. Constantin, M. J. Leitch, R. S. Towell, H. Kanou, A. Devismes, Taku Gunji, H. Gong, J. Seele, D. Kawall, I. Ravinovich, M. Togawa, L. Aphecetche, Takeo Kawabata, M. C. McCain, J. Park, A. Soldatov, Y. J. Mao, P. Tarján, Sean A. Kelly, R. P. Pisani, F. Kajihara, A. V. Kazantsev, S. Kametani, W. Holzmann, Florian Bauer, D. Hornback, I. Garishvili, Akio Kiyomichi, Nikolay Tyurin, Viktor Veszpremi, Y. Nagata, H. Delagrange, H. Masui, A. K. Dubey, Xingguo Li, D. E. Fields, M. N. Wagner, Pàl Hidas, Anne Marie Sickles, M. Heffner, P. Mikeš, M. Naglis, A. A. Bickley, J. H. Kang, S. Takagi, J. S. Haggerty, C. L. Silva, J. L. Drachenberg, Y. Tsuchimoto, A. Romana, Maya Hachiya Shimomura, A. P.T. Palounek, S. Zhou, S. S. Ryu, N. Kurihara, A. Taranenko, Yoichiro Fukao, Tamas Ferenc Csorgo, K. N. Barish, I. V. Sourikova, H. Torii, B. V. Jacak, A. Baldisseri, I. E. Yushmanov, S. P. Sorensen, Y. I. Makdisi, Dylan Walker, T. C. Awes, T. Liška, Kazushi Miki, Masayasu Ishihara, Susumu Sato, Jun Kikuchi, Senta Greene, Tadaaki Isobe, L. Baksay, M. Muniruzzaman, Alexei Khanzadeev, N. Bruner, E. Stenlund, J. L. Nagle, H. Sakata, H. A. Gustafsson, M. Ouchida, M. Chiu, Ajit Kumar Mohanty, T. J. Uam, C. Y. Chi, F. Staley, T. A. Shibata, G. R. Young, Johannes Peter Wessels, M. J. Tannenbaum, B. E. Norman, R. Bennett, E. O'Brien, C. Zhang, J. Asai, J. G. Lajoie, Charles Maguire, S. Leckey, T. Hachiya, M. L. Brooks, M. McCumber, A. K. Purwar, Xiao-yan Li, V. V. Ikonnikov, Y. S. Lai, Ahmed Al-Jamel, M. Finger, A. G. Hansen, B. Love, Shingo Sakai, I. J. Choi, A. Kravitz, Marie Germain, D. Mukhopadhyay, S. Rembeczki, T. V. Moukhanova, D. Isenhower, Viktor Riabov, Saskia Mioduszewski, O. Zaudtke, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Josh Moss, A. G. Litvinenko, A. Toia, L. Mašek, R. Vértesi, German Martinez, D. Bucher, J. G. Boissevain, Masashi Kaneta, Andry Malala Rakotozafindrabe, M. Virius, A. Kozlov, R. Seto, K. Katou, E. Kistenev, K. Haruna, Yves Roland Schutz, Ch. Finck, Jason Newby, K. S. Sim, C. Pinkenburg, Y. L. Yamaguchi, V. Dzhordzhadze, Y. Watanabe, J. Jin, W. C. Chang, H. Harada, E. M. Takagui, Y. Cobigo, M. Stepanov, G. Roche, H. Pei, Roy A. Lacey, M. Issah, B. Komkov, C. P. Singh, N. N. Ajitanand, Rushan Han, B. M. Johnson, Takahiro Nakamura, A. Isupov, C. Suire, H. J. Kim, J. Sziklai, Susumu Oda, Brian Cole, A. Durum, M. D. Malik, H. Hiejima, E. Vznuzdaev, Catherine Micaela Silvestre, D. S. Brown, K. Imai, Norio Saito, M. A. L. Leite, A. Hadj Henni, K. Boyle, Jan Rak, Wei Xie, R. Granier de Cassagnac, A. Adare, V. Babintsev, S. S. Adler, G. S. Kyle, N. Willis, James Alexander, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Philippe Rosnet, Alexandre Lebedev, D. M. Lee, Xiaopeng Zong, M. Mitrovski, R. Pak, Ferenc Deák, N. Kamihara, M. Wysocki, R. Armendariz, Kazuyoshi Kurita, Robert F. Hobbs, A. Drees, J. Kubart, M. A. Volkov, Debashish Pal, S. Sawada, J. Ying, A. Franz, C. A. Ogilvie, B. Espagnon, T. K. Hemmick, Yasuo Miake, S. F. Pate, L. Kochenda, H. Al-Bataineh, X. R. Wang, C. R. Cleven, C. Haegemann, Y. Inoue, R. Kohara, J. Egdemir, V. Papavassiliou, Jason Kamin, Sébastien Gadrat, S. P. Stoll, P. J. Kroon, A. Kiss, S. S.E. Rosendahl, Dong-Hun Kim, G. Bunce, Z. Yasin, Henner Buesching, C. L. Woody, A. Churyn, D. Jouan, P. Chand, Marcus Hohlmann, Steven E. Skutnik, H. Kobayashi, S. Bathe, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, Vaclav Vrba, Klaus Johannes Reygers, K. O. Eyser, K. Fujiwara, H. W. Van Hecke, H. Qu, M. Inuzuka, Hideki Hamagaki, K. Aoki, G. David, I. Tserruya, Yu. Efremenko, V. Singh, G. B. Kim, Hirohiko Sato, K. Dehmelt, Jen-Chieh Peng, N. Grau, K. Shoji, Dong Jo Kim, Osamu Jinnouchi, Alexander Milov, I. Nakagawa, P. W. Stankus, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, V. E. Semenov, J. Zimányi, Tatsuya Chujo, O. Dietzsch, H. Valle, K. Das, E. P. Hartouni, Dipanwita Dutta, T. Ichihara, Julia Velkovska, F. K. Wohn, M. Rosati, Y. Nakamiya, M. Velkovsky, Matthew G. Reuter, Takahiro Fusayasu, G. Baksay, I. D. Ojha, M. T. Bjorndal, A. A. Vinogradov, Henrik Tydesjö, Alexander Malakhov, Jiangyong Jia, Y. Goto, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, S. N. White, F. Matathias, Kensuke Homma, K. Nakano, W. E. Sondheim, S. Chernichenko, H. Lim, P. A. Rukoyatkin, S. Y. Fung, B. Bassalleck, John Hill, K. Oyama, Toru Sugitate, L. D. Isenhower, M. Konno, P. L. McGaughey, François Fleuret, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, S. Belikov, X. Camard, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, and K. Tanida
Subjects: Nuclear reaction, Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Quarkonium, Nuclear matter, Breakup, 7. Clean energy, 01 natural sciences, Baryon, Nuclear physics, 0103 physical sciences, Rapidity, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: We present a new analysis of J/psi production yields in deuteron-gold collisions at root s(NN) =200 GeV using data taken from the PHENIX experiment in 2003 and previously published in S. S. Adler [Phys. Rev. Lett 96, 012304 (2006)]. The high statistics proton-proton J/psi data taken in 2005 are used to improve the baseline measurement and thus construct updated cold nuclear matter modification factors (R-dAu). A suppression of J/psi in cold nuclear matter is observed as one goes forward in rapidity (in the deuteron-going direction), corresponding to a region more sensitive to initial-state low-x gluons in the gold nucleus. The measured nuclear modification factors are compared to theoretical calculations of nuclear shadowing to which a J/psi (or precursor) breakup cross section is added. Breakup cross sections of sigma(breakup)=2.8(-1.4)(+1.7) (2.2(-1.5)(+1.6)) mb are obtained by fitting these calculations to the data using two different models of nuclear shadowing. These breakup cross-section values are consistent within large uncertainties with the 4.2 +/- 0.5 mb determined at lower collision energies. Projecting this range of cold nuclear matter effects to copper-copper and gold-gold collisions reveals that the current constraints are not sufficient to firmly quantify the additional hot nuclear matter effect.
Published: 2008

36. Transverse momentum and centrality dependence of dihadron correlations in Au+Au collisions atsNN=200GeV: Jet quenching and the response of partonic matter

Author: T. Hester, A. Deshpande, M. Grosse Perdekamp, S. Esumi, D. Winter, M. P. Comets, I. Younus, D. Yu Peressounko, S. Butsyk, V-N. Tram, J. T. Mitchell, R. Seidl, Vladislav Manko, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, A. Soldatov, Vladimir Samsonov, I. Otterlund, J. M. Burward-Hoy, M. Chiu, Motoi Inaba, H. Pei, T. A. Shibata, P. Tarján, M. Slunečka, Sergey Fokin, F. Matathias, Tamas Ferenc Csorgo, Kensuke Homma, W. C. Smith, S. Chernichenko, H. Lim, B. Bassalleck, M. Mitrovski, M. Konno, J. L. Nagle, M. Gonin, R. S. Towell, M. K. Lee, K. Ozawa, A. Kiss, Z. Yasin, Henner Buesching, C. L. Woody, I. Garishvili, Akio Kiyomichi, J. Gosset, R. Vértesi, Senta Greene, D. Kawall, D. Isenhower, A. Toia, Mate Csanad, M. Wysocki, J. P. Sullivan, K. Tanida, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, Y. Nakamiya, T. Horaguchi, Y. L. Yamaguchi, B. Komkov, C. Silvestre, I. Ravinovich, H. Pereira, O. Dietzsch, H. Valle, S. Y. Fung, V. I. Kochetkov, Norio Saito, M. A. L. Leite, Marcus Hohlmann, B. E. Norman, E. O'Brien, L. Mašek, S. Kelly, Marisilvia Donadelli, V. Bumazhnov, L. Tomášek, N. Kurihara, Charles Maguire, S. Leckey, J. Murata, S. F. Pate, J. L. Charvet, Andry Malala Rakotozafindrabe, V. S. Pantuev, G. Baksay, M. T. Bjorndal, Josh Moss, Y. Nagata, Julia Velkovska, M. Rosati, M. Harvey, N. N. Ajitanand, Jason Newby, Takahiro Nakamura, I. Tserruya, Yu. Efremenko, V. Singh, A. V. Kazantsev, Gerd Joachim Kunde, S. Bathe, S. S. Ryu, H. Al-Bataineh, Agneta Oskarsson, X. He, O. O. Omiwade, John Hill, X. R. Wang, David D'Enterria, T. E. Miller, E. T. Atomssa, I. Shein, E. Kistenev, J. L. Drachenberg, Bruno Espagnon, A. A. Vinogradov, Henrik Tydesjö, Susumu Oda, Y. Berdnikov, H. A. Gustafsson, C. Zhang, H. A. Torii, Junji Tojo, V. Peresedov, Y. Akiba, M. G. Hur, C. Y. Chi, P. Chung, R. P. Pisani, Y. Le Bornec, H. Harada, Toru Sugitate, L. D. Isenhower, S. Yokkaichi, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, Jiangyong Jia, Y. Goto, S. P. Sorensen, M. Holmes, V. Babintsev, Dylan Walker, J. M. Heuser, T. Shohjoh, A. Durum, M. Issah, Youngil Kwon, V. Papavassiliou, Vaclav Vrba, Klaus Johannes Reygers, P. Mikeš, Sébastien Gadrat, G. S. Kyle, Nikolay Tyurin, M. N. Wagner, K. Okada, M. B. Deaton, B. Sahlmueller, H. En'yo, James Alexander, Anne Marie Sickles, R. Bennett, W. S. Emam, Robert F. Hobbs, E. J. Desmond, Viktor Riabov, K. O. Eyser, M. D. Malik, R. Averbeck, Byung-Sik Hong, K. Fujiwara, Alberto Baldisseri, M. Togawa, Ahmed Al-Jamel, P. Constantin, M. J. Leitch, Roy A. Lacey, Rushan Han, M. N. Hagiwara, François Fleuret, E. Vznuzdaev, B. Forestier, J. G. Lajoie, H. Masui, Y. Tanaka, A. K. Dubey, M. Finger, J. Park, T. Hachiya, A. A. Bickley, D. S. Brown, A. Bazilevsky, Philippe Rosnet, T. K. Shea, S. Batsouli, J. E. Frantz, S. N. White, Florian Bauer, I. J. Choi, A. Kravitz, H. Kanou, J. G. Boissevain, M. Naglis, Taku Gunji, H. Gong, J. Seele, Hiroaki Ohnishi, Masashi Kaneta, F. Kajihara, B. Love, D. E. Fields, Y. Tsuchimoto, Debashish Pal, B. V. Jacak, Alexandre Lebedev, Marie Germain, Herve Borel, D. M. Lee, S. Sawada, C. L. Silva, D. Lynch, F. Staley, L. Baksay, Saskia Mioduszewski, J. Ying, A. Franz, K. Nakano, A. Glenn, Yoichiro Fukao, I. E. Yushmanov, M. Ouchida, Alexei Khanzadeev, H. W. Van Hecke, M. McCumber, A. K. Purwar, N. Willis, K. Das, E. P. Hartouni, W. E. Sondheim, L. Aphecetche, E. Stenlund, Masayasu Ishihara, Hirohiko Sato, S. K. Tuli, M. C. McCain, C. Pinkenburg, H. Sakata, Susumu Sato, H. Delagrange, V. L. Rykov, T. Dahms, A. G. Litvinenko, P. A. Rukoyatkin, E. H. Kim, M. Stepanov, G. Roche, T. Ichihara, A. P.T. Palounek, J. Asai, Y. J. Mao, S. Kametani, G. R. Young, Matthew G. Reuter, Takahiro Fusayasu, Xingguo Li, A. Kozlov, O. Zaudtke, T. V. Moukhanova, I. D. Ojha, Alexander Malakhov, R. Seto, K. Haruna, Christophe Pierre Suire, Alexander Milov, J. H. Kang, J. S. Haggerty, D. Silvermyr, S. Zhou, M. Virius, A. Romana, Y. S. Kim, I. Nakagawa, Xiao-yan Li, L. S. Zolin, W. J. Park, V. Dzhordzhadze, S. Takagi, Johannes Peter Wessels, Shingo Sakai, P. D. Barnes, A. Yanovich, T. L. Thomas, T. C. Awes, T. Liška, K. N. Barish, A. Hadj Henni, Y. Cobigo, K. S. Sim, Y. Watanabe, O. Drapier, Frank Ellinghaus, J. Jin, H. Hiejima, E. R. Kinney, Y. S. Lai, D. P. Morrison, K. Imai, Jun Kikuchi, S. Campbell, Ryugo S. Hayano, K. Boyle, Wei Xie, E. M. Takagui, Jan Rak, R. Granier de Cassagnac, A. Adare, V. E. Semenov, J. Zimányi, Y. Riabov, Kenta Shigaki, C. P. Singh, B. M. Johnson, M. Nguyen, Tatsuya Chujo, A. S. Nyanin, A. Isupov, K. Dehmelt, Jen-Chieh Peng, J. Sziklai, Brian Cole, Dong Jo Kim, Osamu Jinnouchi, Minghui Liu, Kenneth Francis Read, I. V. Sourikova, Tadaaki Isobe, J. S. Chai, P. L. McGaughey, Steven E. Skutnik, H. Qu, Hideki Hamagaki, K. Aoki, G. David, N. Grau, K. Shoji, P. W. Stankus, S. Belikov, K. S. Joo, C. R. Cleven, C. Haegemann, Y. Inoue, P. J. Kroon, Dong-Hun Kim, D. Sharma, B. Azmoun, A. Král, M. J. Kweon, Maya Hachiya Shimomura, Y. I. Makdisi, M. J. Tannenbaum, M. Oka, D. Mukhopadhyay, S. Rembeczki, D. Bucher, J. Chiba, G. C. Mishra, A. Dion, Takao Sakaguchi, C. Klein-Boesing, A. D. Frawley, T. Tabaru, Atsushi Taketani, A. Enokizono, S. H. Aronson, W. Holzmann, Tae-Yeon Lee, Martin Purschke, F. Gastineau, D. Kotchetkov, A. Morreale, Z. Fraenkel, J. Egdemir, Jason Kamin, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, A. Churyn, D. Jouan, C. A. Ogilvie, T. K. Hemmick, Yasuo Miake, L. Kochenda, T. Kawagishi, S. Afanasiev, A. Ster, R. Pak, N. Kamihara, R. Armendariz, Kazuyoshi Kurita, A. Drees, J. Kubart, D. Hornback, M. Heffner, A. Taranenko, Kazushi Miki, K. Hasuko, Hiroyuki Okada, Joakim Nystrand, Eva Haslum, B. Lenzi, M. L. Brooks, A. Shevel, and R. A. Soltz
Subjects: Physics, Quenching, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Hadron, Radiation, 01 natural sciences, Nuclear physics, Distribution (mathematics), Shoulder region, 0103 physical sciences, Transverse momentum, Spectral slope, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Jet quenching
Abstract: Azimuthal angle (Delta phi) correlations are presented for charged hadrons from dijets for 0.4 < p(T)< 10 GeV/c in Au+Au collisions at root s(NN)=200 GeV. With increasing p(T), the away-side distribution evolves from a broad and relatively flat shape to a concave shape, then to a convex shape. Comparisons to p+p data suggest that the away-side can be divided into a partially suppressed "head" region centered at Delta phi similar to pi and an enhanced "shoulder" region centered at Delta phi similar to pi +/- 1.1. The p(T) spectrum for the head region softens toward central collisions, consistent with the onset of jet quenching. The spectral slope for the shoulder region is independent of centrality and trigger p(T), which offers constraints on energy transport mechanisms and suggests that it contains the medium response to energetic jets.
Published: 2008

37. Elliptic Flow forϕMesons and (Anti)deuterons inAu+AuCollisions atsNN=200 GeV

Author: S. Takagi, K. Tanida, C. P. Singh, S. Bathe, K. N. Barish, H. Pei, Agneta Oskarsson, J. Chiba, V. I. Kochetkov, B. M. Johnson, Hiroaki Ohnishi, M. Rosati, Y. Berdnikov, Y. Akiba, G. C. Mishra, N. Kamihara, A. Isupov, C. Suire, Takao Sakaguchi, N. Grau, T. Ichihara, F. Matathias, M. Chiu, S. F. Pate, R. Armendariz, S. Nagamiya, Kazuhiro Tanaka, K. Shoji, C. Klein-Boesing, J. Murata, X. R. Wang, Kazuyoshi Kurita, T. A. Shibata, J. Sziklai, M. Wysocki, G. S. Kyle, Brian Cole, Klaus Johannes Reygers, Matthew G. Reuter, N. Willis, James Alexander, V. Papavassiliou, A. Drees, Sébastien Gadrat, Gerd Joachim Kunde, A. D. Frawley, T. Tabaru, V. Bumazhnov, M. P. Comets, J. M. Burward-Hoy, P. W. Stankus, P. Tarján, S. H. Aronson, Robert F. Hobbs, A. A. Vinogradov, Henrik Tydesjö, R. Averbeck, Byung-Sik Hong, I. D. Ojha, Alexander Malakhov, M. L. Brooks, I. Shein, D. E. Fields, D. Isenhower, B. V. Jacak, S. Esumi, Debashish Pal, S. Sawada, D. Silvermyr, A. Franz, A. Bazilevsky, W. Holzmann, Jiangyong Jia, Y. Goto, B. Espagnon, Philippe Rosnet, Steven E. Skutnik, M. T. Bjorndal, S. Kametani, Saskia Mioduszewski, L. S. Zolin, W. C. Smith, W. J. Park, Alexandre Lebedev, X. He, Maya Hachiya Shimomura, A. Kiss, D. M. Lee, Y. I. Makdisi, W. A. Zajc, O. O. Omiwade, Tadaaki Isobe, A. K. Purwar, J. S. Chai, J. Egdemir, J. H. Kang, J. S. Haggerty, A. Romana, P. D. Barnes, A. Yanovich, H. Qu, V. Baublis, I. Tserruya, V. Peresedov, Henner Buesching, Xingguo Li, Yu. Efremenko, S. Y. Fung, A. Denisov, V. Cianciolo, E. H. Kim, S. P. Stoll, J. T. Mitchell, P. L. McGaughey, S. S.E. Rosendahl, Hideki Hamagaki, K. Aoki, Taku Gunji, M. K. Lee, K. Ozawa, C. L. Woody, Y. Tanaka, Senta Greene, G. Bunce, J. Jin, Youngil Kwon, F. Kajihara, E. M. Takagui, G. David, M. J. Tannenbaum, Sergey Fokin, T. K. Shea, Shingo Sakai, Vladislav Manko, V-N. Tram, Roy A. Lacey, R. S. Towell, Akio Kiyomichi, B. E. Norman, John Hill, V. Singh, T. Horaguchi, H. Masui, A. K. Dubey, D. Jouan, M. N. Hagiwara, E. O'Brien, H. Delagrange, D. Mukhopadhyay, S. Kelly, Anne Marie Sickles, H. A. Torii, O. Dietzsch, N. Kurihara, Toru Sugitate, L. D. Isenhower, D. Bucher, R. A. Soltz, H. Borel, C. R. Cleven, H. Valle, P. J. Kroon, M. Grosse Perdekamp, N. N. Ajitanand, S. Butsyk, C. A. Ogilvie, Minghui Liu, Motoi Inaba, Charles Maguire, S. Leckey, Marie Germain, Mate Csanad, T. K. Hemmick, V. S. Pantuev, Yasuo Miake, M. G. Hur, C. Y. Chi, Kenneth Francis Read, H. A. Gustafsson, M. Harvey, A. Baldisseri, Vladimir Samsonov, J. G. Boissevain, I. Otterlund, C. Vale, Julia Velkovska, B. Komkov, Takahiro Nakamura, K. Das, Y. S. Kim, H. W. Vanhecke, Christine Angela Aidala, A. G. Litvinenko, M. Naglis, Josh Moss, Masashi Kaneta, A. V. Kazantsev, François Fleuret, B. Forestier, L. Kochenda, C. L. Silva, Junji Tojo, C. Zhang, I. V. Sourikova, Norio Saito, E. P. Hartouni, T. L. Thomas, Hirohiko Sato, M. A. L. Leite, T. Shohjoh, E. Kistenev, T. Kawagishi, S. N. White, A. Kozlov, S. K. Tuli, A. Durum, C. Pinkenburg, K. Okada, B. Sahlmueller, David D'Enterria, R. Seto, Tamas Ferenc Csorgo, Kensuke Homma, Ryugo S. Hayano, D. Winter, K. Haruna, D. Yu Peressounko, Viktor Riabov, J. L. Nagle, Yoichiro Fukao, Y. Riabov, D. S. Brown, G. R. Young, H. Harada, H. En'yo, T. C. Awes, P. Constantin, M. J. Leitch, Jen-Chieh Peng, Kenta Shigaki, T. E. Miller, S. Chernichenko, H. Lim, M. Nguyen, Masayasu Ishihara, V. Dzhordzhadze, M. Stepanov, G. Roche, S. Batsouli, B. Bassalleck, A. S. Nyanin, W. E. Sondheim, A. Enokizono, R. P. Pisani, Nikolay Tyurin, M. Konno, V. Babintsev, P. A. Rukoyatkin, Jan Rak, Dong Jo Kim, M. N. Wagner, Osamu Jinnouchi, M. C. McCain, R. Granier de Cassagnac, J. Gosset, J. P. Sullivan, A. P.T. Palounek, Susumu Sato, M. Holmes, Alexander Milov, O. Drapier, K. S. Sim, F. Staley, Y. Watanabe, E. R. Kinney, D. P. Morrison, S. Campbell, V. E. Semenov, H. Hiejima, J. Zimányi, Tatsuya Chujo, K. Imai, A. Deshpande, S. Yokkaichi, J. M. Heuser, I. Younus, A. Soldatov, B. Azmoun, M. J. Kweon, Y. Le Bornec, A. Dion, Atsushi Taketani, K. Hasuko, Martin Purschke, F. Gastineau, Hiroyuki Okada, Joakim Nystrand, Eva Haslum, D. Kotchetkov, S. Afanasiev, A. Ster, L. Aphecetche, Z. Fraenkel, M. Heffner, A. Taranenko, Johannes Peter Wessels, M. Issah, M. D. Malik, E. Vznuzdaev, S. Belikov, K. S. Joo, E. J. Desmond, A. Hadj Henni, M. Togawa, J. Park, Florian Bauer, K. Boyle, Wei Xie, Y. Tsuchimoto, D. Sharma, I. E. Yushmanov, Alexei Khanzadeev, E. Stenlund, T. V. Moukhanova, R. Vértesi, Jason Newby, M. Gonin, H. Pereira, J. L. Drachenberg, S. P. Sorensen, J. G. Lajoie, T. Hachiya, I. J. Choi, J. E. Frantz, A. Glenn, V. L. Rykov, T. Dahms, I. Ravinovich, Y. Nagata, S. S. Ryu, R. Bennett, Ahmed Al-Jamel, O. Zaudtke, and Y. Cobigo
Subjects: Physics, Quark, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, High Energy Physics::Phenomenology, Elliptic flow, Hadron, General Physics and Astronomy, Constituent quark, 01 natural sciences, Nuclear physics, Baryon, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Scaling, Bar (unit)
Abstract: Differential elliptic flow (v(2)) for phi mesons and (anti)deuterons ((d) over bar )d is measured for Au + Au collisions at root s(NN) = 200 GeV. The v(2) for phi mesons follows the trend of lighter pi(+/-) and K-+/- mesons, suggesting that ordinary hadrons interacting with standard hadronic cross sections are not the primary driver for elliptic flow development. The v(2) values for ((d) over bar )d suggest that elliptic flow is additive for composite particles. This further validation of the universal scaling of v(2) per constituent quark for baryons and mesons suggests that partonic collectivity dominates the transverse expansion dynamics.
Published: 2007

38. J/ψProduction versus Transverse Momentum and Rapidity inp+pCollisions ats=200 GeV

Author: J. Newby, G. Roche, D. Hornback, M. Heffner, A. Taranenko, Kazushi Miki, J. T. Mitchell, Alexei Khanzadeev, S. N. White, Hiroyuki Okada, Eva Haslum, B. Lenzi, X. He, D. Kawall, K. Tanida, R. Seidl, E. Stenlund, Vladislav Manko, M. Slunečka, V. S. Pantuev, O. Zaudtke, O. O. Omiwade, V. Peresedov, H. Sakata, V. I. Kochetkov, R. A. Soltz, C. Silvestre, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, Tae-Yeon Lee, Martin Purschke, Robert F. Hobbs, S. Belikov, A. Kiss, Hiroaki Ohnishi, N. N. Ajitanand, Frank Ellinghaus, M. Rosati, H. Kanou, Taku Gunji, H. Gong, J. Seele, Marisilvia Donadelli, T. Hester, V. Bumazhnov, Junji Tojo, Saskia Mioduszewski, E. R. Kinney, J. Chiba, D. P. Morrison, R. Pak, J. Murata, C. Vale, B. S. Chang, M. B. Deaton, Takahiro Nakamura, Debashish Pal, F. Kajihara, G. S. Kyle, M. Virius, N. Kamihara, Z. Yasin, Henner Buesching, S. Sawada, Susumu Oda, Christine Angela Aidala, T. Lika, J. Ying, S. Campbell, A. Franz, Anne Marie Sickles, J. Klay, A. Durum, K. Okada, S. Batsouli, D. Kotchetkov, V. E. Semenov, Marcus Hohlmann, P. Mike, R. Armendariz, H. Delagrange, Youngil Kwon, Kazuyoshi Kurita, J. Zimányi, Gerd Joachim Kunde, James Alexander, H. Masui, A. K. Dubey, B. Sahlmueller, J. Jin, A. Drees, Tatsuya Chujo, J. Kubart, Y. Nakamiya, H. En'yo, E. M. Takagui, Takao Sakaguchi, I. Shein, R. C. De Granier, Y. Tanaka, T. V. Moukhanova, A. A. Vinogradov, A. Morreale, M. J. Leitch, M. Mitrovski, H. A. Torii, I. Tserruya, C. Klein-Boesing, Toru Sugitate, Yu. Efremenko, A. A. Bickley, R. Vértesi, Z. Fraenkel, R. Averbeck, W. A. Zajc, D. E. Fields, C. P. Singh, S. Bathe, L. D. Isenhower, Agneta Oskarsson, C. A. Ogilvie, V. Singh, M. Wysocki, J. Jia, J. Kang, T. K. Hemmick, B. V. Jacak, S. Takagi, B. M. Johnson, A. P.T. Palounek, S. F. Pate, Yasuo Miake, Y. Berdnikov, A. D. Frawley, T. Tabaru, Byung-Sik Hong, Y. Goto, M. McCumber, A. Isupov, Y. Akiba, J. Sziklai, M. Mishra, S. Nagamiya, O. Drapier, Alberto Baldisseri, A. Deshpande, G. Baksay, H. Al-Bataineh, C. R. Cleven, S. Zhou, L. Kochenda, S. H. Aronson, A. Bazilevsky, K. S. Joo, K. Das, Vaclav Vrba, Klaus Johannes Reygers, Brian Cole, A. Glenn, R. S. Towell, S. Esumi, C. Haegemann, Y. Inoue, K. N. Barish, A. Rakotozafindrabe, Xingguo Li, I. Garishvili, Akio Kiyomichi, J. Egdemir, Y. J. Mao, E. P. Hartouni, S. Kametani, François Fleuret, P. Rosnet, I. Ravinovich, W. Holzmann, V. Papavassiliou, G. R. Young, Jason Kamin, S. P. Stoll, K. O. Eyser, A. K. Purwar, K. Fujiwara, N. Kurihara, Maya Hachiya Shimomura, J. E. Frantz, L. Baksay, Y. I. Makdisi, S. S.E. Rosendahl, G. Bunce, Roy A. Lacey, S. P. Sorensen, K. Dehmelt, V. Baublis, Y. Watanabe, A. Denisov, V. Cianciolo, Dong-Hun Kim, H. Pei, V-N. Tram, A. Churyn, Rushan Han, Y. Nagata, Dylan Walker, D. Jouan, J. S. Haggerty, D. Winter, M. P. Comets, D. Yu Peressounko, C. Y. Chi, Jen-Chieh Peng, A. Romana, I. Younus, Sergey Fokin, T. A. Shibata, M. K. Lee, H. W. Van Hecke, D. Sharma, S. Butsyk, Vladimir Samsonov, A. Soldatov, Steven E. Skutnik, P. Tarján, Alexandre Lebedev, E. J. Desmond, J. G. Lajoie, T. Hachiya, Motoi Inaba, T. Horaguchi, K. S. Sim, M. L. Brooks, M. J. Tannenbaum, B. Azmoun, A. Král, M. J. Kweon, M. Togawa, D. Isenhower, J. Park, V. Dzhordzhadze, I. J. Choi, A. Kravitz, M. Naglis, O. Dietzsch, C. L. Silva, S. Gadrat, A. Toia, H. Valle, Mate Csanad, F. Matathias, D. Mukhopadhyay, S. Rembeczki, Xiong Wang, B. Love, D. M. Lee, Y. Tsuchimoto, L. Maek, H. Qu, H. A. Gustafsson, Charles Maguire, M. Oka, Masayasu Ishihara, Kensuke Homma, K. Nakano, Tamas Ferenc Csorgo, I. E. Yushmanov, H. Pereira, H. Hiejima, A. Dion, Susumu Sato, A. G. Litvinenko, C. Zhang, J. L. Charvet, Dong Jo Kim, Osamu Jinnouchi, F. Staley, Julia Velkovska, Atsushi Taketani, Hideki Hamagaki, K. Aoki, G. David, Senta Greene, R. Bennett, J. L. Nagle, E. Kistenev, P. Constantin, T. E. Miller, A. Enokizono, W. E. Sondheim, Y. L. Yamaguchi, E. T. Atomssa, S. Chernichenko, A. Kozlov, Viktor Riabov, David D'Enterria, K. Imai, B. Komkov, B. E. Norman, R. Seto, E. O'Brien, M. Finger, K. Haruna, P. Chung, H. Harada, N. Grau, B. Bassalleck, K. Shoji, P. A. Rukoyatkin, P. W. Stankus, W. S. Emam, Norio Saito, Jan Rak, M. N. Wagner, M. A. L. Leite, A. Adare, M. Konno, T. Ichihara, Herve Borel, D. Lynch, Matthew G. Reuter, Takahiro Fusayasu, V. L. Rykov, T. Dahms, Y. S. Lai, Alexander Malakhov, D. Silvermyr, V. Babintsev, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, E. H. Kim, J. G. Boissevain, Masashi Kaneta, M. Gonin, C. Pinkenburg, M. Ouchida, J. Asai, Shingo Sakai, T. L. Thomas, M. Stepanov, Ryugo S. Hayano, J. Gosset, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, S. Yokkaichi, C. L. Woody, A. Shevel, Tadaaki Isobe, P. L. McGaughey, J. C. Hill, M. Chiu, L. Tomáek, I. V. Sourikova, A. V. Kazantsev, M. G. Perdekamp, Yoichiro Fukao, T. C. Awes, Kyoichiro Ozawa, Jun Kikuchi, Minghui Liu, Kenneth Francis Read, A. Hadj Henni, K. Boyle, Wei Xie, M. Issah, M. D. Malik, E. Vznuzdaev, L. Aphecetche, Johannes Peter Wessels, S. Afanasiev, and A. Ster
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, General Physics and Astronomy, 01 natural sciences, Nuclear physics, 0103 physical sciences, Transverse momentum, Production model, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: J/psi production in p+p collisions at root s=200 GeV has been measured by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider over a rapidity range of -2.2 < y < 2.2 and a transverse momentum range of 0 < p(T)< 9 GeV/c. The size of the present data set allows a detailed measurement of both the p(T) and the rapidity distributions and is sufficient to constrain production models. The total cross section times the branching ratio is B-ll sigma(J/psi)(pp)=178 +/- 3(stat)+/- 53(sys)+/- 18(norm) nb.
Published: 2007

39. System Size and Energy Dependence of Jet-Induced Hadron Pair Correlation Shapes inCu+CuandAu+AuCollisions atsNN=200and 62.4 GeV

Author: A. Shevel, H. Pei, Robert F. Hobbs, S. Belikov, K. S. Joo, I. V. Sourikova, H. Torii, Debashish Pal, P. Tarján, Sean A. Kelly, M. A. Volkov, S. Takagi, H. J. Kim, S. Sawada, J. Ying, A. Franz, M. Ouchida, L. Tomášek, J. Asai, K. O. Eyser, V. S. Pantuev, Viktor Veszpremi, I. Ravinovich, A. G. Hansen, Shingo Sakai, B. Espagnon, S. Y. Fung, M. Harvey, K. Fujiwara, K. N. Barish, R. S. Towell, I. Tserruya, T. L. Thomas, C. A. Ogilvie, Y. Nagata, Ryugo S. Hayano, Y. Riabov, T. K. Hemmick, D. Sharma, Kenta Shigaki, M. Nguyen, A. S. Nyanin, Yu. Efremenko, Maya Hachiya Shimomura, V. Singh, Yasuo Miake, I. Garishvili, Akio Kiyomichi, Junji Tojo, S. F. Pate, Tae-Yeon Lee, Martin Purschke, F. Gastineau, N. N. Ajitanand, Hiroaki Ohnishi, B. D. Fox, Mate Csanad, J. L. Charvet, S. S. Ryu, Y. I. Makdisi, Anne Marie Sickles, G. B. Kim, T. J. Uam, Senta Greene, K. Okada, H. Al-Bataineh, X. R. Wang, J. G. Boissevain, S. Esumi, M. B. Deaton, N. Kurihara, E. J. Desmond, L. Kochenda, Jean-Pierre Cussonneau, Masashi Kaneta, John Hill, K. Oyama, Steven E. Skutnik, D. Kotchetkov, M. L. Brooks, F. Matathias, M. Togawa, B. Sahlmueller, H. En'yo, J. M. Qualls, P. Constantin, M. J. Leitch, B. E. Norman, Takahiro Nakamura, E. H. Kim, K. Katou, Toru Sugitate, A. Morreale, M. J. Tannenbaum, B. Love, Kensuke Homma, T. Kawagishi, Marie Germain, E. O'Brien, Z. Fraenkel, M. Naglis, V. V. Ikonnikov, G. R. Young, V. Papavassiliou, C. L. Silva, T. E. Miller, D. Mukhopadhyay, Sébastien Gadrat, S. Rembeczki, David D'Enterria, R. K. Choudhury, A. G. Litvinenko, C. Silvestre, Hirohiko Sato, D. Bucher, J. Park, Florian Bauer, R. A. Soltz, Susumu Oda, O. Dietzsch, H. Valle, M. G. Hur, C. Y. Chi, Y. Tanaka, T. K. Shea, E. T. Atomssa, C. Pinkenburg, D. Y.-U. Peressounko, R. Pak, S. K. Tuli, T. Shohjoh, R. Santo, A. Durum, S. C. Johnson, S. Chernichenko, Masayasu Ishihara, B. Azmoun, A. Král, Dipanwita Dutta, M. J. Kweon, H. Lim, B. Bassalleck, Ferenc Deák, M. Grosse Perdekamp, N. Kamihara, Jan Rak, J. M. Burward-Hoy, M. Stepanov, G. Roche, R. Armendariz, A. Kozlov, R. Seto, K. Haruna, C. H. Kuberg, J. Chiba, G. C. Mishra, W. A. Zajc, Takao Sakaguchi, V. Baublis, A. Denisov, V. Cianciolo, Xiao-yan Li, R. Bennett, Xingguo Li, Ahmed Al-Jamel, M. Finger, Susumu Sato, C. Klein-Boesing, H. Qu, J. E. Frantz, M. Gonin, P. Chung, R. P. Pisani, Y. Tsuchimoto, L. Baksay, K. Das, M. Mitrovski, R. Granier de Cassagnac, A. Adare, V.N. Penev, M. Muniruzzaman, A. D. Frawley, F. Staley, T. Tabaru, Sergey Fokin, Y. L. Yamaguchi, B. Komkov, Herve Borel, D. Lynch, Y. Le Bornec, A. Deshpande, D. S. Brown, Julia Velkovska, M. Rosati, M. Konno, M. Oka, A. Pierson, Kazuyoshi Kurita, A. Drees, V. Dzhordzhadze, X. He, O. O. Omiwade, M. Velkovsky, E. P. Hartouni, J. Kubart, J. Gosset, J. P. Sullivan, W. C. Smith, L. Sanfratello, I. E. Yushmanov, Nikolay Tyurin, Alexander Milov, S. H. Aronson, I. Nakagawa, M. Wysocki, Norio Saito, M. A. L. Leite, H. Pereira, M. Inuzuka, Hideki Hamagaki, K. Aoki, A. Glenn, M. Holmes, W. S. Emam, G. David, C. P. Singh, T. Horaguchi, A. Hoover, M. K. Lee, K. Ozawa, J. T. Mitchell, B. M. Johnson, A. Dion, V. Peresedov, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, Andry Malala Rakotozafindrabe, David Olle Rickard Silvermyr, Charles Maguire, S. Leckey, R. Kohara, W. Holzmann, O. Drapier, Frank Ellinghaus, M. N. Wagner, Atsushi Taketani, R. Seidl, A. Enokizono, D. E. Fields, Vladislav Manko, A. Kiss, V. Babintsev, J. Egdemir, A. A. Vinogradov, Henrik Tydesjö, D. Winter, Josh Moss, R. Vértesi, Jason Kamin, K. S. Sim, S. S. Adler, E. R. Kinney, D. P. Morrison, B. V. Jacak, V. L. Rykov, T. Dahms, J. L. Drachenberg, S. Campbell, G. S. Kyle, M. Chiu, Ajit Kumar Mohanty, N. Willis, A. Isupov, C. Suire, M. Slunečka, Z. Yasin, Henner Buesching, James Alexander, Y. Watanabe, R. Averbeck, S. P. Sorensen, Jiangyong Jia, Y. Goto, S. P. Stoll, S. Batsouli, T. A. Shibata, Y. Kwon, Byung-Sik Hong, A. Bazilevsky, I. Younus, H. Masui, A. K. Dubey, C. L. Woody, W. C. Chang, T. Hester, J. Sziklai, V. E. Semenov, H. Hiejima, J. Zimányi, Dylan Walker, Philippe Rosnet, Alexandre Lebedev, M. McCumber, A. K. Purwar, E. Kistenev, Tatsuya Chujo, C. R. Cleven, C. Haegemann, Y. Inoue, D. M. Lee, Xiaopeng Zong, K. Dehmelt, A. A. Bickley, A. Soldatov, D. Kawall, S. S.E. Rosendahl, G. Bunce, K. Tanida, Roy A. Lacey, Brian Cole, S. Yokkaichi, Rushan Han, M. N. Hagiwara, Jen-Chieh Peng, J. G. Lajoie, J. M. Heuser, T. Hachiya, K. Imai, V. I. Kochetkov, O. Zaudtke, X. Camard, P. Chand, Marcus Hohlmann, S. Butsyk, A. Churyn, P. J. Kroon, Dong-Hun Kim, I. J. Choi, A. Kravitz, M. Virius, J. Murata, Vladimir Samsonov, C. Vale, D. Jouan, Y. J. Mao, I. Otterlund, S. Kametani, Gerd Joachim Kunde, B. S. Chang, L. Aphecetche, H. Harada, Takeo Kawabata, I. Shein, H. W. Vanhecke, Christine Angela Aidala, Ch. Finck, Jason Newby, J. Klay, Pàl Hidas, Saskia Mioduszewski, V-N. Tram, D. Isenhower, J. H. Kang, A. Toia, Dong Jo Kim, L. Mašek, Osamu Jinnouchi, H. Kobayashi, J. S. Haggerty, Y. Nakamiya, M. C. McCain, N. Grau, Alberto Baldisseri, A. Romana, K. Shoji, S. Bathe, Agneta Oskarsson, Tamas Ferenc Csorgo, P. W. Stankus, Motoi Inaba, German Martinez, Johannes Peter Wessels, Y. Berdnikov, J. L. Nagle, Y. Akiba, G. Baksay, A. P.T. Palounek, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, Vaclav Vrba, Klaus Johannes Reygers, Y. Cobigo, Alexei Khanzadeev, Yves Roland Schutz, M. T. Bjorndal, Y. S. Lai, M. Issah, H. Kanou, A. Devismes, Taku Gunji, H. Gong, J. Seele, M. D. Malik, N. Bruner, E. Stenlund, E. Vznuzdaev, F. Kajihara, J. Jin, E. M. Takagui, H. Sakata, H. A. Gustafsson, H. Delagrange, A. Hadj Henni, C. Zhang, K. Boyle, Wei Xie, S. Zhou, Y. S. Kim, Viktor Riabov, T. V. Moukhanova, S. Afanasiev, A. Ster, D. Hornback, M. Heffner, A. Taranenko, Kazushi Miki, B. Khachaturov, T. Matsumoto, K. Hasuko, Hiroyuki Okada, Joakim Nystrand, Eva Haslum, B. Lenzi, Minghui Liu, Kenneth Francis Read, A. V. Kazantsev, P. Mikeš, Yoichiro Fukao, T. C. Awes, T. Liška, Jun Kikuchi, Tadaaki Isobe, J. S. Chai, P. L. McGaughey, L. D. Isenhower, François Fleuret, B. Forestier, T. Ichihara, F. K. Wohn, Matthew G. Reuter, Takahiro Fusayasu, I. D. Ojha, Alexander Malakhov, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, S. N. White, K. Nakano, W. E. Sondheim, and P. A. Rukoyatkin
Subjects: Shock wave, Physics, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, Jet (particle physics), Radiation, 01 natural sciences, Gluon, Azimuth, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, 010306 general physics, Cherenkov radiation, Beam (structure)
Abstract: We present azimuthal angle correlations of intermediate transverse momentum (1-4 GeV/c) hadrons from dijets in Cu+Cu and Au+Au collisions at root s(NN)=62.4 and 200 GeV. The away-side dijet induced azimuthal correlation is broadened, non-Gaussian, and peaked away from Delta phi=pi in central and semicentral collisions in all the systems. The broadening and peak location are found to depend upon the number of participants in the collision, but not on the collision energy or beam nuclei. These results are consistent with sound or shock wave models, but pose challenges to Cherenkov gluon radiation models.
Published: 2007

40. Energy Loss and Flow of Heavy Quarks inAu+AuCollisions atsNN=200 GeV

Author: J. G. Boissevain, Masashi Kaneta, M. Mitrovski, S. Esumi, B. Azmoun, A. Král, M. J. Kweon, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, M. Rosati, R. A. Soltz, J. L. Drachenberg, S. P. Sorensen, Dylan Walker, R. Vértesi, Jason Newby, O. Drapier, Frank Ellinghaus, E. R. Kinney, M. Grosse Perdekamp, J. E. Frantz, B. Love, D. P. Morrison, S. Campbell, Bruno Espagnon, A. A. Vinogradov, Henrik Tydesjö, J. G. Lajoie, Herve Borel, D. Lynch, V. E. Semenov, J. Zimányi, C. Pinkenburg, Steven E. Skutnik, Tae-Yeon Lee, Martin Purschke, Marie Germain, F. Gastineau, D. Kotchetkov, A. Morreale, Z. Fraenkel, S. Belikov, K. S. Joo, Tatsuya Chujo, Y. Goto, D. Sharma, T. Hachiya, A. Glenn, Mate Csanad, K. Hasuko, L. Tomášek, V. S. Pantuev, A. Deshpande, A. G. Litvinenko, I. J. Choi, A. Kravitz, V. L. Rykov, T. Dahms, H. Qu, M. Stepanov, G. Roche, Hiroyuki Okada, A. Kozlov, Hideki Hamagaki, K. Aoki, G. David, R. Seto, M. Wysocki, E. H. Kim, Joakim Nystrand, W. A. Zajc, I. Ravinovich, V. Baublis, S. Kelly, K. Haruna, N. N. Ajitanand, M. Issah, M. Harvey, D. Winter, M. P. Comets, D. Yu Peressounko, Eva Haslum, B. Lenzi, Y. Nagata, S. Bathe, Agneta Oskarsson, H. Pei, V. Dzhordzhadze, S. Takagi, A. V. Kazantsev, Takahiro Nakamura, S. S. Ryu, Y. Berdnikov, Y. Akiba, J. Gosset, K. N. Barish, S. F. Pate, A. Denisov, V. Cianciolo, David D'Enterria, M. D. Malik, E. Vznuzdaev, Junji Tojo, P. Tarján, M. Chiu, T. A. Shibata, Susumu Oda, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, Xiao-yan Li, J. P. Sullivan, R. P. Pisani, T. Shohjoh, Sergey Fokin, Vaclav Vrba, Klaus Johannes Reygers, A. Durum, H. Al-Bataineh, X. R. Wang, Nikolay Tyurin, M. N. Wagner, J. T. Mitchell, P. Mikeš, K. Nakano, T. Horaguchi, I. Younus, D. Isenhower, A. Toia, L. Mašek, W. E. Sondheim, Charles Maguire, S. Leckey, D. S. Brown, R. Bennett, Ahmed Al-Jamel, M. Finger, Jan Rak, K. Okada, Yoichiro Fukao, A. Soldatov, R. Seidl, Vladislav Manko, M. Slunečka, R. Pak, N. Kamihara, S. Yokkaichi, M. L. Brooks, Josh Moss, J. Chiba, B. Sahlmueller, V. Papavassiliou, Sébastien Gadrat, R. Granier de Cassagnac, T. Hester, T. C. Awes, A. Adare, J. M. Heuser, P. A. Rukoyatkin, H. En'yo, R. Armendariz, D. E. Fields, E. Kistenev, P. Constantin, M. J. Leitch, T. Liška, Jun Kikuchi, C. P. Singh, C. R. Cleven, Kazuyoshi Kurita, Y. L. Yamaguchi, B. Komkov, Senta Greene, B. V. Jacak, G. C. Mishra, C. Haegemann, Y. Inoue, A. Drees, I. Tserruya, M. McCumber, A. K. Purwar, Norio Saito, B. E. Norman, E. O'Brien, Takao Sakaguchi, C. Klein-Boesing, M. A. L. Leite, B. M. Johnson, Yu. Efremenko, A. Hadj Henni, P. J. Kroon, Dong-Hun Kim, M. Gonin, A. D. Frawley, K. Boyle, V-N. Tram, T. Tabaru, C. Vale, B. S. Chang, V. Singh, Christine Angela Aidala, J. Klay, H. Harada, J. L. Charvet, V. Babintsev, G. S. Kyle, M. B. Deaton, A. Isupov, J. Kubart, J. M. Burward-Hoy, Wei Xie, J. Sziklai, H. Pereira, W. C. Smith, T. E. Miller, James Alexander, O. Zaudtke, Y. Tanaka, E. T. Atomssa, T. K. Shea, J. Jia, S. H. Aronson, R. Averbeck, Byung-Sik Hong, M. K. Lee, K. Ozawa, Motoi Inaba, Brian Cole, A. Bazilevsky, Hirohiko Sato, S. K. Tuli, Youngil Kwon, W. Holzmann, P. Chung, Philippe Rosnet, Y. J. Mao, S. Kametani, Maya Hachiya Shimomura, M. Virius, M. Holmes, K. Dehmelt, Alexandre Lebedev, L. Baksay, Jen-Chieh Peng, Y. I. Makdisi, D. M. Lee, J. S. Haggerty, A. Romana, S. Y. Fung, W. S. Emam, M. Ouchida, J. Asai, S. Afanasiev, A. Ster, H. Kanou, K. Das, Taku Gunji, H. Gong, J. Seele, Y. Cobigo, E. P. Hartouni, Shingo Sakai, Hiroaki Ohnishi, F. Kajihara, M. Naglis, Anne Marie Sickles, Y. S. Lai, C. L. Silva, Dong Jo Kim, H. Delagrange, K. O. Eyser, K. Fujiwara, D. Hornback, H. A. Torii, Osamu Jinnouchi, M. Heffner, R. S. Towell, Toru Sugitate, Masayasu Ishihara, L. D. Isenhower, I. Garishvili, Akio Kiyomichi, M. J. Tannenbaum, Susumu Sato, N. Grau, S. Zhou, A. Taranenko, F. Staley, N. Kurihara, K. Shoji, Kazushi Miki, Minghui Liu, Y. S. Kim, François Fleuret, M. G. Hur, C. Y. Chi, B. Forestier, Kenneth Francis Read, G. R. Young, P. W. Stankus, T. Ichihara, N. Willis, D. Mukhopadhyay, H. A. Gustafsson, L. Aphecetche, S. Rembeczki, J. Egdemir, F. Matathias, H. W. Van Hecke, D. Bucher, Matthew G. Reuter, Saskia Mioduszewski, D. Kawall, Kensuke Homma, Takahiro Fusayasu, K. Tanida, C. Zhang, V. I. Kochetkov, C. Silvestre, I. D. Ojha, Alexander Malakhov, Jason Kamin, J. Murata, J. Jin, E. M. Takagui, S. Chernichenko, S. P. Stoll, Marisilvia Donadelli, V. Bumazhnov, Johannes Peter Wessels, Gerd Joachim Kunde, D. Silvermyr, H. Lim, I. Shein, Andry Malala Rakotozafindrabe, A. Kiss, Viktor Riabov, B. Bassalleck, L. S. Zolin, W. J. Park, S. S.E. Rosendahl, Alberto Baldisseri, Z. Yasin, Henner Buesching, G. Bunce, M. Konno, C. L. Woody, S. Batsouli, P. D. Barnes, A. Yanovich, Xingguo Li, H. Kano, Tadaaki Isobe, J. S. Chai, A. Churyn, O. Dietzsch, H. Valle, Y. Nakamiya, Marcus Hohlmann, D. Jouan, A. Shevel, Roy A. Lacey, K. S. Sim, Julia Velkovska, Rushan Han, M. N. Hagiwara, P. L. McGaughey, Y. Watanabe, S. N. White, M. C. McCain, S. Butsyk, Vladimir Samsonov, C. A. Ogilvie, J. C. Hill, I. Otterlund, X. He, J. Kang, T. K. Hemmick, Yasuo Miake, G. Baksay, L. Kochenda, O. O. Omiwade, H. Hiejima, A. P.T. Palounek, Tamas Ferenc Csorgo, I. V. Sourikova, J. L. Nagle, M. T. Bjorndal, K. Imai, V. Peresedov, Y. Le Bornec, T. L. Thomas, Ryugo S. Hayano, Robert F. Hobbs, Debashish Pal, Y. Riabov, S. Sawada, J. Ying, A. Franz, Kenta Shigaki, M. Nguyen, A. S. Nyanin, E. J. Desmond, H. Masui, A. K. Dubey, M. Togawa, J. Park, Florian Bauer, Y. Tsuchimoto, I. E. Yushmanov, Alexei Khanzadeev, A. A. Bickley, E. Stenlund, H. Sakata, T. V. Moukhanova, and T. Kawagishi
Subjects: Quark, Physics, 010308 nuclear & particles physics, Elliptic flow, General Physics and Astronomy, Electron, 01 natural sciences, 7. Clean energy, Nuclear physics, Particle decay, Pion, 0103 physical sciences, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Anisotropy
Abstract: The PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC) has measured electrons with 0.3 < p(T) < 9 GeV/c at midrapidity (y < 0.35) from heavy-flavor (charm and bottom) decays in Au + Au collisions at root s(NN) = 200 GeV. The nuclear modification factor R-AA relative to p + p collisions shows a strong suppression in central Au + Au collisions, indicating substantial energy loss of heavy quarks in the medium produced at RHIC energies. A large azimuthal anisotropy v(2) with respect to the reaction plane is observed for 0.5 < p(T) < 5 GeV/c indicating substantial heavy-flavor elliptic flow. Both R-AA and v(2) show a p(T) dependence different from those of neutral pions. A comparison to transport models which simultaneously describe R-AA(p(T)) and v(2)(p(T)) suggests that the viscosity to entropy density ratio is close to the conjectured quantum lower bound, i.e., near a perfect fluid.
Published: 2007

41. Spectroscopic Study of Neutron Shell Closures via Nucleon Transfer in the Near-Dripline NucleusO23

Author: Takashi Nakamura, N. Imai, Zs. Fülöp, Yasuhiro Togano, G. Kalinka, Hiroyoshi Sakurai, Z. Elekes, Shawn Bishop, Satoshi Takeuchi, Julien Gibelin, A. A. Korsheninnikov, Tsuyoshi Ohnishi, Taro Nakao, A. Saito, H. Iwasaki, Yosuke Kondo, Shinsuke Ota, M. K. Suzuki, Meiko Kurokawa, Hiroyuki Takeda, Dóra Sohler, D. Suzuki, E. Yu. Nikolskii, Yoshiyuki Yanagisawa, Kazuyoshi Kurita, Y. Hashimoto, Toshiyuki Sumikama, T. Okumura, Y. Satou, Nori Aoi, A. Perera, Zs. Dombrádi, Naohito Iwasa, Tomoko Gomi, Tohru Motobayashi, and N. Matsui
Subjects: Physics, 010308 nuclear & particles physics, Nuclear Theory, Monte Carlo method, Shell (structure), General Physics and Astronomy, 01 natural sciences, Resonance (particle physics), Isotopes of oxygen, Nuclear physics, Excited state, 0103 physical sciences, Particle, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: Neutron single particle energies have been measured in 23O using the 22O(d,p)23O*-->22O+n process. The energies of the resonant states have been deduced to be 4.00(2) MeV and 5.30(4) MeV. The first excited state can be assigned to the nu d3/2 single particle state from a comparison with shell model calculations. The measured 4.0 MeV energy difference between the nu s1/2 and nu d3/2 states gives the size of the N=16 shell gap which is in agreement with the recent USD05 ("universal" sd from 2005) shell model calculation, and is large enough to explain the unbound nature of the oxygen isotopes heavier than A=24. The resonance detected at 5.3 MeV can be assigned to a state out of the sd shell model space. Its energy corresponds to a approximately 1.3 MeV sized N=20 shell gap, therefore, the N=20 shell closure disappears at Z=8 in agreement with Monte Carlo shell model calculations using SDPF-M interaction.
Published: 2007

42. Measurement of High-pTSingle Electrons from Heavy-Flavor Decays inp+pCollisions ats=200 GeV

Author: Mate Csanad, Steven E. Skutnik, M. Grosse Perdekamp, S. Afanasiev, S. Butsyk, Vladimir Samsonov, A. Ster, David D'Enterria, Anne Marie Sickles, L. Aphecetche, A. V. Kazantsev, H. Qu, P. Mikeš, Yoichiro Fukao, Johannes Peter Wessels, S. Bathe, D. Winter, Hideki Hamagaki, G. David, T. C. Awes, Tamas Ferenc Csorgo, H. A. Gustafsson, T. L. Thomas, G. R. Young, Jun Kikuchi, J. L. Nagle, D. E. Fields, C. Zhang, F. Matathias, B. V. Jacak, Minghui Liu, Takhee Lee, Kensuke Homma, Kenneth Francis Read, M. McCumber, M. N. Wagner, Jason Newby, Ryugo S. Hayano, O. Dietzsch, T. Liška, Y. Riabov, Agneta Oskarsson, Y. Berdnikov, D. Hornback, M. Heffner, A. Taranenko, K. Dehmelt, Jen-Chieh Peng, R. Vertesi, K. S. Joo, Maya Hachiya Shimomura, J. E. Frantz, M. Issah, M. D. Malik, P. Constantin, E. Vznuzdaev, Tadaaki Isobe, P. L. McGaughey, S. Chernichenko, Kenta Shigaki, M. Nguyen, Y. Akiba, S. Nagamiya, Y. I. Makdisi, Viktor Riabov, J. C. Hill, M. Chiu, B. Bassalleck, Kazushi Miki, Michael Finger Jr, E. J. Desmond, E. H. Kim, S. Takagi, J. G. Boissevain, Masashi Kaneta, H. Valle, A. S. Nyanin, C. A. Ogilvie, Xiong Wang, Vaclav Vrba, Klaus Johannes Reygers, M. Konno, R. S. Towell, I. Garishvili, Akio Kiyomichi, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, A. Deshpande, M. Togawa, J. Kang, T. K. Hemmick, S. Esumi, J. Park, Dong Jo Kim, M. Gonin, T. Hester, D. Y.-U. Peressounko, Yasuo Miake, Osamu Jinnouchi, H. Kano, Andry Malala Rakotozafindrabe, A. Shevel, W. A. Zajc, V. Baublis, K. Aoki, N. Grau, A. Denisov, Jan Rak, Y. Nakamiya, V. Cianciolo, Y. Tsuchimoto, K. N. Barish, K. Shoji, L. Kochenda, K. O. Eyser, A. K. Purwar, I. E. Yushmanov, K. Fujiwara, Julia Velkovska, N. Kurihara, M. J. Tannenbaum, P. Tarján, R. Granier de Cassagnac, A. Adare, Hiroyuki Okada, Sergey Fokin, L. Baksay, V-N. Tram, Senta Greene, N. N. Ajitanand, Alexei Khanzadeev, C. Y. Chi, P. W. Stankus, C. Pinkenburg, E. Stenlund, I. Tserruya, Yu. Efremenko, Eva Haslum, B. Lenzi, Roy A. Lacey, H. Sakata, M. Mishra, T. Horaguchi, D. Lynch, I. V. Sourikova, V. Singh, B. E. Norman, Rushan Han, Hiroaki Ohnishi, R. Pak, D. Mukhopadhyay, S. Rembeczki, Youngil Kwon, Motoi Inaba, Y. L. Yamaguchi, E. O'Brien, Y. Watanabe, Takahiro Nakamura, G. Baksay, M. Stepanov, G. Roche, M. Rosati, N. Kamihara, H. W. Van Hecke, D. Sharma, M. Slunecka, Saskia Mioduszewski, K. S. Sim, V. Dzhordzhadze, B. Komkov, T. V. Moukhanova, J. T. Mitchell, V. L. Rykov, T. Dahms, Norio Saito, M. L. Brooks, J. Chiba, I. Younus, R. Armendariz, C. R. Cleven, A. Kiss, M. Ouchida, M. A. L. Leite, S. N. White, H. Hiejima, R. Seidl, Vladislav Manko, I. Ravinovich, C. Haegemann, Y. Inoue, J. Asai, Susumu Oda, X. He, Y. Nagata, Z. Yasin, Henner Buesching, C. L. Woody, Kazuyoshi Kurita, O. O. Omiwade, A. Soldatov, Alexander Milov, I. Nakagawa, K. Imai, S. Belikov, H. Pereira, K. Das, Shingo Sakai, Dong-Hun Kim, V. Babintsev, A. P.T. Palounek, B. Azmoun, A. Král, M. J. Kweon, A. Drees, A. A. Vinogradov, O. Drapier, V. Peresedov, A. Isupov, Marcus Hohlmann, G. S. Kyle, Y. Goto, Frank Ellinghaus, J. Jin, E. M. Takagui, E. R. Kinney, D. P. Morrison, A. Durum, James Alexander, C. Vale, E. P. Hartouni, S. Campbell, J. Gosset, V. E. Semenov, B. S. Chang, J. Seele, R. Averbeck, Byung-Sik Hong, Takao Sakaguchi, J. Kubart, C. Klein-Boesing, J. Zimányi, M. Naglis, A. Bazilevsky, C. P. Singh, Christine Angela Aidala, J. Klay, Philippe Rosnet, Tatsuya Chujo, R. Bennett, S. Batsouli, C. L. Silva, B. M. Johnson, Alexandre Lebedev, Catherine Micaela Silvestre, H. Masui, A. K. Dubey, D. M. Lee, A. D. Frawley, T. Tabaru, A. A. Bickley, C. Suire, O. Zaudtke, Masayasu Ishihara, J. Sziklai, S. H. Aronson, B. Love, W. Holzmann, J. Egdemir, Susumu Sato, Brian Cole, M. Oka, Jason Kamin, A. G. Litvinenko, F. Staley, D. Kawall, S. P. Stoll, K. Tanida, A. Dion, S. Yokkaichi, Y. J. Mao, S. Kametani, V. I. Kochetkov, A. Kozlov, R. Seto, A. Glenn, K. Haruna, S. S.E. Rosendahl, J. Murata, G. Bunce, J. S. Haggerty, Gerd Joachim Kunde, A. Romana, I. Shein, A. Churyn, D. Jouan, Atsushi Taketani, A. Enokizono, Y. S. Lai, Martin Purschke, J. L. Charvet, D. Kotchetkov, A. Morreale, Z. Fraenkel, T. E. Miller, E. T. Atomssa, P. Chung, W. S. Emam, H. Kanou, Taku Gunji, H. Gong, F. Kajihara, H. Delagrange, S. Zhou, A. Baldisseri, M. Virius, Robert F. Hobbs, T. A. Shibata, D. Isenhower, A. Toia, L. Mašek, Debashish Pal, S. Sawada, J. Ying, M. K. Lee, K. Ozawa, A. Franz, L. Tomášek, V. S. Pantuev, Junji Tojo, K. Okada, B. Sahlmueller, M. Mitrovski, H. En'yo, M. J. Leitch, M. Wysocki, S. F. Pate, H. Al-Bataineh, V. Papavassiliou, Sébastien Gadrat, K. Nakano, W. E. Sondheim, P. A. Rukoyatkin, T. Ichihara, M. B. Deaton, Matthew G. Reuter, Takahiro Fusayasu, Y. Tanaka, Alexander Malakhov, J. Jia, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, Charles Maguire, E. Kistenev, H. Harada, H. A. Torii, Toru Sugitate, L. D. Isenhower, A. Hadj Henni, H. Pei, K. Boyle, Wei Xie, François Fleuret, Xingguo Li, S. P. Sorensen, Dylan Walker, J. G. Lajoie, T. Hachiya, I. J. Choi, A. Kravitz, R. A. Soltz, and H. Borel
Subjects: Quantum chromodynamics, Physics, Range (particle radiation), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, General Physics and Astronomy, Perturbative QCD, Electron, 7. Clean energy, 01 natural sciences, Nuclear physics, Momentum, Particle decay, 0103 physical sciences, High Energy Physics::Experiment, Charm (quantum number), Atomic physics, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider
Abstract: The momentum distribution of electrons from decays of heavy flavor (charm and bottom) for midrapidity |y|< 0.35 in p+p collisions at s=200 GeV has been measured by the PHENIX experiment at the BNL Relativistic Heavy Ion Collider over the transverse momentum range 0.3 < p(T)< 9 GeV/c. Two independent methods have been used to determine the heavy-flavor yields, and the results are in good agreement with each other. A fixed-order-plus-next-to-leading-log perturbative QCD calculation agrees with the data within the theoretical and experimental uncertainties, with the data/theory ratio of 1.71 +/- 0.02(stat)+/- 0.18(sys) for 0.3 < p(T)< 9 GeV/c. The total charm production cross section at this energy has also been deduced to be sigma(cc)=567 +/- 57(stat)+/- 193(sys) mu b.
Published: 2006

43. Improved measurement of double helicity asymmetry in inclulsive midrapidityπ0production for polarizedp+pcollisions ats=200 GeV

Author: M. Issah, M. D. Malik, E. Vznuzdaev, N. N. Ajitanand, O. Dietzsch, J. G. Boissevain, Masashi Kaneta, Takahiro Nakamura, A. Hadj Henni, T. V. Moukhanova, Ferenc Deák, N. Kamihara, K. Katou, K. Boyle, Wei Xie, H. Valle, Maya Hachiya Shimomura, O. Zaudtke, T. Shohjoh, F. Matathias, R. Armendariz, Kazuyoshi Kurita, A. Durum, Y. Cobigo, A. Drees, J. L. Drachenberg, Y. I. Makdisi, I. Ravinovich, D. S. Brown, C. Pinkenburg, Y. Nagata, A. Isupov, S. S. Ryu, Dipanwita Dutta, Julia Velkovska, M. Stepanov, G. Roche, S. F. Pate, Y. Tanaka, L. Aphecetche, Takeo Kawabata, R. Kohara, C. Zhang, C. R. Cleven, J. Egdemir, D. E. Fields, S. Afanasiev, A. Ster, M. J. Tannenbaum, B. V. Jacak, V. V. Ikonnikov, T. K. Shea, R. Bennett, Ahmed Al-Jamel, A. K. Purwar, S. P. Stoll, Johannes Peter Wessels, D. Mukhopadhyay, D. Bucher, C. H. Kuberg, S. C. Johnson, B. Azmoun, M. J. Kweon, S. S.E. Rosendahl, G. Bunce, J. E. Frantz, A. Glenn, J. Chiba, V. L. Rykov, T. Dahms, J. M. Burward-Hoy, Minghui Liu, G. C. Mishra, D. Jouan, X. R. Wang, P. J. Kroon, I. Tserruya, J. Gosset, J. P. Sullivan, Kenneth Francis Read, Y. Le Bornec, T. Ichihara, Takao Sakaguchi, M. Rosati, M. Velkovsky, C. Klein-Boesing, M. A. Volkov, J. G. Lajoie, A. D. Frawley, T. Tabaru, B. D. Fox, V-N. Tram, T. Hachiya, S. H. Aronson, C. A. Ogilvie, Y. J. Kwon, Tadaaki Isobe, W. Holzmann, I. J. Choi, A. A. Vinogradov, Henrik Tydesjö, Hiroaki Ohnishi, V. Singh, J. S. Chai, S. Yokkaichi, J. M. Heuser, T. K. Hemmick, Yasuo Miake, P. L. McGaughey, W. C. Smith, Sean A. Kelly, F. K. Wohn, Matthew G. Reuter, Motoi Inaba, S. Batsouli, G. B. Kim, Jiangyong Jia, Y. Goto, A. Dion, L. Sanfratello, J. M. Qualls, E. J. Desmond, Y. J. Mao, S. Kametani, A. Kiss, Yuri Efremenko, L. Kochenda, Mate Csanad, M. K. Lee, Pàl Hidas, J. H. Kang, K. Ozawa, Charles Maguire, S. Leckey, Atsushi Taketani, Jean-Pierre Cussonneau, J. S. Haggerty, V. Papavassiliou, Sébastien Gadrat, E. H. Kim, A. Romana, M. Heffner, T. Kawagishi, Steven E. Skutnik, A. V. Kazantsev, V. Bumazhnov, M. P. Comets, M. Togawa, Viktor Veszpremi, Henner Buesching, S. Belikov, K. S. Joo, J. Park, I. D. Ojha, Alexander Malakhov, Josh Moss, A. Taranenko, C. L. Woody, Soren Pontoppidan Sorensen, Xingguo Li, Robert F. Hobbs, H. Qu, Florian Bauer, Yoichiro Fukao, Hirohiko Sato, E. Kistenev, M. Gonin, V.N. Penev, S. K. Tuli, David D'Enterria, M. C. McCain, V. S. Pantuev, M. Inuzuka, Hideki Hamagaki, M. Harvey, L. S. Zolin, D. Sharma, Jun Kikuchi, G. David, W. J. Park, H. Pereira, K. Das, B. Khachaturov, Jen-Chieh Peng, R. P. Pisani, Debashish Pal, H. Harada, P. Chand, S. Sawada, Paul Stankus, Junji Tojo, H. Pei, A. Franz, E. P. Hartouni, Y. Tsuchimoto, Senta Greene, Martin Purschke, F. Gastineau, M. T. Bjorndal, T. Matsumoto, A. P.T. Palounek, K. Hasuko, P. D. Barnes, A. Yanovich, Nikolay Tyurin, B. E. Norman, S. Y. Fung, B. Espagnon, P. Tarján, K. Okada, D. Kotchetkov, E. O'Brien, R. A. Soltz, H. Borel, H. J. Kim, I. V. Sourikova, M. Grosse Perdekamp, H. Torii, N. Grau, W. C. Chang, I. E. Yushmanov, Hiroyuki Okada, M. N. Wagner, Joakim Nystrand, K. Shoji, B. Sahlmueller, H. En'yo, P. Constantin, S. Esumi, John Hill, K. Oyama, Z. Fraenkel, A. Pierson, Dong Jo Kim, Roy A. Lacey, Osamu Jinnouchi, M. N. Hagiwara, Eva Haslum, S. S. Adler, M. J. Leitch, David Olle Rickard Silvermyr, G. S. Kyle, T. L. Thomas, Toru Sugitate, L. D. Isenhower, Alexei Khanzadeev, W. A. Zajc, S. Butsyk, R. K. Choudhury, D. Winter, D. Yu Peressounko, Ryugo S. Hayano, Vladimir Samsonov, I. Otterlund, N. Willis, James Alexander, V. Baublis, K. Aoki, François Fleuret, B. Forestier, N. Bruner, E. Stenlund, A. Denisov, R. Averbeck, Byung-Sik Hong, V. Cianciolo, S. N. White, A. Bazilevsky, Alexander Milov, M. Wysocki, Sergey Fokin, Philippe Rosnet, Y. Riabov, Kenta Shigaki, O. Drapier, M. Nguyen, E. R. Kinney, T. Horaguchi, A. Hoover, D. P. Morrison, W. E. Sondheim, Tamas Ferenc Csorgo, S. Campbell, P. A. Rukoyatkin, H. A. Gustafsson, J. L. Nagle, V. E. Semenov, J. Zimányi, Alexandre Lebedev, Tatsuya Chujo, D. M. Lee, Kensuke Homma, Viktor Riabov, A. S. Nyanin, Xiaopeng Zong, S. Chernichenko, H. Lim, B. Komkov, B. Bassalleck, Norio Saito, M. A. L. Leite, M. Konno, H. W. Van Hecke, R. Vértesi, J. T. Mitchell, V. Babintsev, A. G. Hansen, Shingo Sakai, Vladislav Manko, H. Kobayashi, S. Bathe, Terry C Awes, Ch. Finck, Jason Newby, Agneta Oskarsson, X. Camard, Y. Berdnikov, Christine Angela Aidala, Y. Akiba, S. Nagamiya, Kazuhiro Tanaka, Klaus Johannes Reygers, K. S. Sim, H. Hiejima, K. Imai, T. E. Miller, R. Santo, A. Enokizono, M. Holmes, Anne Marie Sickles, M. Chiu, Ajit Kumar Mohanty, T. A. Shibata, D. Isenhower, German Martinez, A. Devismes, Taku Gunji, Jan Rak, F. Kajihara, R. Granier de Cassagnac, H. Delagrange, S. Zhou, A. Baldisseri, Y. S. Kim, C. P. Singh, B. M. Johnson, C. Suire, J. Sziklai, Brian Cole, Saskia Mioduszewski, S. Takagi, K. N. Barish, Yves Roland Schutz, J. Jin, E. M. Takagui, T. J. Uam, M. L. Brooks, R. S. Towell, Akio Kiyomichi, Marie Germain, A. G. Litvinenko, A. Kozlov, G. R. Young, R. Seto, K. Haruna, V. Dzhordzhadze, N. Kurihara, X. He, O. O. Omiwade, V. Peresedov, H. Masui, A. K. Dubey, M. G. Hur, C. Y. Chi, K. Tanida, V. I. Kochetkov, J. Murata, Gerd Joachim Kunde, I. Shein, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, M. Naglis, C. L. Silva, Masayasu Ishihara, Susumu Sato, M. Muniruzzaman, and F. Staley
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Scattering, media_common.quotation_subject, 01 natural sciences, 7. Clean energy, Helicity, Asymmetry, Gluon, Nuclear physics, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, Perturbation theory (quantum mechanics), PHENIX detector, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, media_common
Abstract: We present an improved measurement of the double helicity asymmetry for pi(0) production in polarized proton-proton scattering at root s=200 GeV employing the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). The improvements to our previous measurement come from two main factors: Inclusion of a new data set from the 2004 RHIC run with higher beam polarizations than the earlier run and a recalibration of the beam polarization measurements for the earlier run, which resulted in reduced uncertainties and increased beam polarizations. The results are compared to a Next to Leading Order (NLO) perturbative Quantum Chromodynamics (pQCD) calculation with a range of polarized gluon distributions.
Published: 2006

44. VanishingN=20Shell Gap: Study of Excited States inNe27,28

Author: Takashi Kubo, Z. Elekes, N. Imai, H. Hasegawa, Kenichiro Yoneda, Zs. Fülöp, Hidetada Baba, Yasuhiro Togano, K. Demichi, Masakazu Ishihara, Shin'ichiro Michimasa, T. Kishida, Masahiro Notani, Zs. Dombrádi, Shinsuke Ota, Tsuyoshi Ohnishi, Y. U. Matsuyama, Hiroyoshi Sakurai, Susumu Shimoura, Toshiyuki Minemura, T. Motobayashi, Hironori Iwasaki, E. Takeshita, Akito Saito, Julien Gibelin, M. Tamaki, Satoshi Takeuchi, Nori Aoi, S. Kawai, Hooi Jin Ong, Kazuyoshi Kurita, S. Kanno, Yoshiyuki Yanagisawa, A. Ozawa, Tomoko Gomi, K. Yamada, and H. K. Sakai
Subjects: Physics, 010308 nuclear & particles physics, SHELL model, Shell (structure), General Physics and Astronomy, 01 natural sciences, Intermediate energy, Excited state, 0103 physical sciences, Quadrupole, Neutron, Atomic physics, 010306 general physics, Excitation
Abstract: This Letter reports on the (1)H((28)Ne, (28)Ne) and (1)H((28)Ne, (27)Ne) reactions studied at intermediate energy using a liquid hydrogen target. From the cross section populating the first 2(+) excited state of (28)Ne, and using the previously determined BE(2) value, the neutron quadrupole transition matrix element has been calculated to be M(n)=13.8 +/- 3.7 fm(2). In the neutron knockout reaction, two low-lying excited states were populated in (27)Ne. Only one of them can be interpreted by the sd shell model while the additional state may intrude from the fp shell. These experimental observations are consistent with the presence of fp shell configurations at low excitation energy in (27,28)Ne nuclei caused by a vanishing N=20 shell gap at Z=10.
Published: 2006

45. Proton inelastic scattering studies at the borders of the 'island of inversion': TheNa30,31andMg33,34case

Author: Hiroyoshi Sakurai, E. Takeshita, T. Motobayashi, Hironori Iwasaki, T. Kubo, Satoshi Takeuchi, Hidetada Baba, Julien Gibelin, N. Imai, Shin'ichiro Michimasa, K. Demichi, Zs. Fülöp, Yasuhiro Togano, Masakazu Ishihara, Z. Elekes, Toshiyuki Minemura, T. Kishida, Shinsuke Ota, H. Hasegawa, M. Tamaki, Akito Saito, Kenichiro Yoneda, Y. U. Matsuyama, Tetsuya Ohnishi, Nori Aoi, S. Kawai, Susumu Shimoura, S. Kanno, Yoshiyuki Yanagisawa, A. Ozawa, Kazuyoshi Kurita, H. K. Sakai, Tomoko Gomi, K. Yamada, Masahiro Notani, Zs. Dombrádi, and Hooi Jin Ong
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, Island of inversion, 0103 physical sciences, SHELL model, Inelastic scattering, Atomic physics, 010306 general physics, 01 natural sciences
Published: 2006

46. Inelastic proton scattering on 16C

Author: T. Gomi, S. Kawai, A. Saito, Masahiro Notani, Kazuyoshi Kurita, Hiroyoshi Sakurai, Hidetada Baba, Y. Togano, Zs. Dombradi, T. Minemura, Satoshi Takeuchi, M. Tamaki, S. Michimasa, T. Kubo, Masakazu Ishihara, Nobuaki Imai, H. Hasegawa, S. Kanno, Y. Matsuyama, Zs. Fülöp, Kenichiro Yoneda, K. Yamada, Shinsuke Ota, Hooi Jin Ong, Yoshiyuki Yanagisawa, K. Demichi, Z. Elekes, Tohru Motobayashi, J. Gibelin, H. K. Sakai, E. Takeshita, S. Shimoura, H. Iwasaki, and Nori Aoi
Subjects: Physics, History, Proton, 010308 nuclear & particles physics, Nuclear Theory, Deformation (meteorology), Inelastic scattering, 01 natural sciences, Inelastic neutron scattering, Computer Science Applications, Education, 0103 physical sciences, Quadrupole, Physics::Accelerator Physics, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Beam (structure)
Abstract: We have studied the 2 1 + state in neutron-rich {sr16}C via inelastic proton scattering in inverse kinematics, using a 33 MeV/nucleon beam. From the angle-integrated cross-section, the deformation parameter β pp′ = 0.50(8) is obtained. This value is greater than the deformation parameter deduced from the lifetime measurement. With these two result combined, the ratio of the neutron and proton quadrupole matrix elements is deduced to be approximately 7, indicating a neutron-dominant quadrupole collectivity in 16C
Published: 2006

47. Inelastic proton scattering on 16C

Author: Nobuaki Imai, M. Tamaki, J. Gibelin, S. Michimasa, T. Minemura, Shinsuke Ota, Satoshi Takeuchi, Kenichiro Yoneda, A. Saito, H. Hasegawa, Y. Togano, Z. Elekes, Hooi Jin Ong, S. Kawai, E. Takeshita, Hiroyoshi Sakurai, Masakazu Ishihara, Y. Matsuyama, Nori Aoi, Zs. Fülöp, Masahiro Notani, Zs. Dombradi, Hidetada Baba, S. Kanno, H. K. Sakai, K. Yamada, S. Shimoura, Tohru Motobayashi, Kazuyoshi Kurita, H. Iwasaki, T. Kubo, Yoshiyuki Yanagisawa, K. Demichi, T. Gomi, Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), C. Gross, W. Nazarewicz, and K. Rykaczewski
Subjects: Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, γ transitions and level energies, Nuclear Theory, Hadron, 25.40.Ep, 23.20.Lv, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Inelastic scattering, 01 natural sciences, Inelastic neutron scattering, Nuclear physics, 0103 physical sciences, Quadrupole, Physics::Accelerator Physics, Nuclear fusion, Neutron, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon, Inelastic proton scattering
Abstract: NESTER; We have studied the 2+1 state in neutron-rich 16Cvia inelastic proton scattering in inverse kinematics, using a 33 MeV/nucleon beam. From the angle-integrated cross-section, the deformation parameter βpp' = 0.50(8) is obtained. This value is greater than the deformation parameter deduced from the lifetime measurement. With these two result combined, the ratio of the neutron and proton quadrupole matrix elements is deduced to be approximately 7, indicating a neutron-dominant quadrupole collectivity in 16C.
Published: 2005

48. The study of shell closures in light neutron-rich nuclei

Author: Kazuyoshi Kurita, K. Yamada, N. Imai, A. Saito, E. Takeshita, M. Tamaki, Zs. Fülöp, Yasuhiro Togano, H. Hasegawa, Masahiro Notani, Zs. Dombrádi, Y. Hashimoto, N. Matsui, S. Kanno, Shinsuke Ota, Gábor Kalinka, Hiroyoshi Sakurai, Shawn Bishop, N. Aoi, J. Gibelin, Dóra Sohler, M. Ishihara, Yoshiyuki Yanagisawa, K. Demichi, D. Suzuki, Susumu Shimoura, A. Ozawa, A. A. Korsheninnikov, Z. Elekes, Tsuyoshi Ohnishi, E. Yu. Nikolskii, M. Suzuki, T. Gomi, Tohru Motobayashi, Taro Nakao, Y. Matsuyama, T. Kubo, T. Kishida, K. Yoneda, H. Iwasaki, Hooi Jin Ong, H. K. Sakai, Hidetada Baba, T. Okumura, Y. Satou, Toshiyuki Sumikama, Meiko Kurokawa, S. Kawai, Shin'ichiro Michimasa, A. Perera, Naohito Iwasa, Satoshi Takeuchi, H. Takeda, T. Minemura, Takashi Nakamura, Yosuke Kondo, Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Direct evidence, Shell (structure), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Valley of stability, 0103 physical sciences, Neutron, Atomic physics, 010306 general physics, Spectroscopy, Magic number (physics)
Abstract: The behavior of the nuclear shell structure far away from the valley of stability is discussed in this paper with an emphasis on the N = 20 magic number. Two experimental examples, namely γ-spectroscopy of 27Ne by 1H(28Ne, 27Ne) reaction and single-particle spectroscopy of 23O by 22O(d, p)23O* → 22O+n process in inverse kinematics, are shown providing indirect indication and a direct evidence for the extreme decrease of the N = 20 shell gap and, consequently, the vanishing N = 20 magicity.
Published: 2007

49. Bound excited states in 27F

Author: Tetsuya Ohnishi, Masahiro Notani, Zs. Dombrádi, J. Gibelin, T. Kubo, A. Saito, Y. Matsuyama, Kazuyoshi Kurita, Hooi Jin Ong, S. Kawai, N. Imai, K. Yoneda, Zs. Fülöp, Yasuhiro Togano, H. K. Sakai, T. Kishida, K. Yamada, T. Gomi, H. Hasegawa, S. Kanno, E. Takeshita, Susumu Shimoura, Shin'ichiro Michimasa, T. Minemura, Satoshi Takeuchi, Hidetada Baba, M. Ishihara, Hiroyoshi Sakurai, Yoshiyuki Yanagisawa, K. Demichi, Tohru Motobayashi, A. Ozawa, Shinsuke Ota, H. Iwasaki, M. Tamaki, Z. Elekes, N. Aoi, Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear and High Energy Physics, Nuclear Theory, chemistry.chemical_element, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 21.60.Cs, 23.20.Lv, 25.40.Ep, 27.30.+t, 29.30.Kv, 0103 physical sciences, Bound state, 0202 electrical engineering, electronic engineering, information engineering, Neutron, 010306 general physics, Nuclear Experiment, Physics, Isotope, 010308 nuclear & particles physics, Chemistry, Gamma ray, Nuclear shell model, Nuclear structure, 020206 networking & telecommunications, Excited state, Fluorine, 020201 artificial intelligence & image processing, Atomic physics, Nucleon, Radioactive decay, Sign (mathematics)
Abstract: The 1H(27F, 25,26,27F) reactions have been studied at 40 MeV / nucleon average energy using a liquid hydrogen target. For 25F, 26F and 27F nuclei, we have observed two γ-ray peaks each originating from the decay of two bound excited states. This is the first sign of the existence of bound excited states in 26,27F. The presence of a single bound excited state in 27F is a clear indication of a substantial change in the structure of the fluorine isotopes approaching the neutron dripline. The proposed second excited states in 25,26,27F nuclei have no counterparts in either the p s d or the s d p f shell model calculations suggesting the appearance of nuclear structure effects lying out of these model spaces.
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