111 results on '"M, Heffner"'
Search Results
2. PHENIX Collaboration
- Author
-
A. Adare, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, R. Akimoto, H. Al-Bataineh, J. Alexander, M. Alfred, A. Al-Jamel, H. Al-Ta'ani, K.R. Andrews, V. Andrieux, A. Angerami, K. Aoki, N. Apadula, L. Aphecetche, E. Appelt, Y. Aramaki, R. Armendariz, S.H. Aronson, J. Asai, H. Asano, E.C. Aschenauer, E.T. Atomssa, R. Averbeck, T.C. Awes, C. Ayuso, B. Azmoun, V. Babintsev, A. Bagoly, M. Bai, X. Bai, G. Baksay, L. Baksay, A. Baldisseri, N.S. Bandara, B. Bannier, K.N. Barish, P.D. Barnes, B. Bassalleck, A.T. Basye, S. Bathe, S. Batsouli, V. Baublis, F. Bauer, C. Baumann, S. Baumgart, A. Bazilevsky, M. Beaumier, S. Beckman, S. Belikov, R. Belmont, J. Ben-Benjamin, R. Bennett, A. Berdnikov, Y. Berdnikov, J.H. Bhom, A.A. Bickley, M.T. Bjorndal, D. Black, D.S. Blau, M. Boer, J.G. Boissevain, J.S. Bok, H. Borel, K. Boyle, M.L. Brooks, D.S. Brown, D. Broxmeyer, J. Bryslawskyj, D. Bucher, H. Buesching, V. Bumazhnov, G. Bunce, J.M. Burward-Hoy, C. Butler, S. Butsyk, C.M. Camacho, S. Campbell, V. Canoa Roman, A. Caringi, P. Castera, R. Cervantes, J.-S. Chai, B.S. Chang, W.C. Chang, J.-L. Charvet, C.-H. Chen, S. Chernichenko, C.Y. Chi, J. Chiba, M. Chiu, I.J. Choi, J.B. Choi, S. Choi, R.K. Choudhury, P. Christiansen, T. Chujo, P. Chung, A. Churyn, O. Chvala, V. Cianciolo, Z. Citron, C.R. Cleven, Y. Cobigo, B.A. Cole, M.P. Comets, Z. Conesa del Valle, M. Connors, P. Constantin, N. Cronin, N. Crossette, M. Csanád, T. Csörgő, T. Dahms, S. Dairaku, I. Danchev, T.W. Danley, K. Das, A. Datta, M.S. Daugherity, G. David, M.K. Dayananda, M.B. Deaton, K. DeBlasio, K. Dehmelt, H. Delagrange, A. Denisov, D. d'Enterria, A. Deshpande, E.J. Desmond, K.V. Dharmawardane, O. Dietzsch, L. Ding, A. Dion, P.B. Diss, D. Dixit, J.H. Do, M. Donadelli, L. D'Orazio, J.L. Drachenberg, O. Drapier, A. Drees, K.A. Drees, A.K. Dubey, M. Dumancic, J.M. Durham, A. Durum, D. Dutta, V. Dzhordzhadze, S. Edwards, Y.V. Efremenko, J. Egdemir, T. Elder, F. Ellinghaus, W.S. Emam, T. Engelmore, A. Enokizono, H. En'yo, B. Espagnon, S. Esumi, K.O. Eyser, B. Fadem, W. Fan, N. Feege, D.E. Fields, M. Finger, F. Fleuret, S.L. Fokin, B. Forestier, Z. Fraenkel, J.E. Frantz, A. Franz, A.D. Frawley, K. Fujiwara, Y. Fukao, Y. Fukuda, S.-Y. Fung, T. Fusayasu, S. Gadrat, K. Gainey, C. Gal, P. Gallus, P. Garg, A. Garishvili, I. Garishvili, F. Gastineau, H. Ge, M. Germain, F. Giordano, A. Glenn, H. Gong, X. Gong, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S.V. Greene, G. Grim, M. Grosse Perdekamp, Y. Gu, T. Gunji, L. Guo, H. Guragain, H.-Å. Gustafsson, T. Hachiya, A. Hadj Henni, C. Haegemann, J.S. Haggerty, M.N. Hagiwara, K.I. Hahn, H. Hamagaki, J. Hamblen, H.F. Hamilton, R. Han, S.Y. Han, J. Hanks, H. Harada, C. Harper, E.P. Hartouni, K. Haruna, M. Harvey, S. Hasegawa, T.O.S. Haseler, K. Hashimoto, E. Haslum, K. Hasuko, R. Hayano, S. Hayashi, X. He, M. Heffner, T.K. Hemmick, T. Hester, J.M. Heuser, H. Hiejima, J.C. Hill, K. Hill, R. Hobbs, M. Hohlmann, R.S. Hollis, M. Holmes, W. Holzmann, K. Homma, B. Hong, T. Horaguchi, Y. Hori, D. Hornback, T. Hoshino, N. Hotvedt, J. Huang, S. Huang, M.G. Hur, T. Ichihara, R. Ichimiya, J. Ide, H. Iinuma, Y. Ikeda, K. Imai, Y. Imazu, J. Imrek, M. Inaba, Y. Inoue, A. Iordanova, D. Isenhower, L. Isenhower, M. Ishihara, A. Isinhue, T. Isobe, M. Issah, A. Isupov, Y. Ito, D. Ivanishchev, Y. Iwanaga, B.V. Jacak, M. Javani, S.J. Jeon, M. Jezghani, Z. Ji, J. Jia, X. Jiang, J. Jin, O. Jinnouchi, D. John, B.M. Johnson, T. Jones, E. Joo, K.S. Joo, V. Jorjadze, D. Jouan, D.S. Jumper, F. Kajihara, S. Kametani, N. Kamihara, J. Kamin, S. Kanda, M. Kaneta, S. Kaneti, B.H. Kang, J.H. Kang, J.S. Kang, H. Kanou, D. Kapukchyan, J. Kapustinsky, K. Karatsu, S. Karthas, M. Kasai, T. Kawagishi, D. Kawall, M. Kawashima, A.V. Kazantsev, S. Kelly, T. Kempel, J.A. Key, V. Khachatryan, P.K. Khandai, A. Khanzadeev, K. Kihara, K.M. Kijima, J. Kikuchi, A. Kim, B.I. Kim, C. Kim, D.H. Kim, D.J. Kim, E. Kim, E.-J. Kim, G.W. Kim, H.-J. Kim, H.J. Kim, K.-B. Kim, M. Kim, M.H. Kim, S.H. Kim, Y.-J. Kim, Y.K. Kim, Y.-S. Kim, B. Kimelman, D. Kincses, E. Kinney, K. Kiriluk, Á. Kiss, E. Kistenev, R. Kitamura, A. Kiyomichi, J. Klatsky, J. Klay, C. Klein-Boesing, D. Kleinjan, P. Kline, T. Koblesky, L. Kochenda, V. Kochetkov, M. Kofarago, Y. Komatsu, B. Komkov, M. Konno, J. Koster, D. Kotchetkov, D. Kotov, A. Kozlov, A. Král, A. Kravitz, F. Krizek, P.J. Kroon, J. Kubart, S. Kudo, G.J. Kunde, N. Kurihara, K. Kurita, M. Kurosawa, M.J. Kweon, Y. Kwon, G.S. Kyle, R. Lacey, Y.S. Lai, J.G. Lajoie, E.O. Lallow, D. Layton, A. Lebedev, Y. Le Bornec, S. Leckey, B. Lee, D.M. Lee, G.H. Lee, J. Lee, K. Lee, K.B. Lee, K.S. Lee, M.K. Lee, S. Lee, S.H. Lee, S.R. Lee, T. Lee, M.J. Leitch, M.A.L. Leite, M. Leitgab, E. Leitner, B. Lenzi, Y.H. Leung, B. Lewis, N.A. Lewis, X. Li, X.H. Li, P. Lichtenwalner, P. Liebing, H. Lim, S.H. Lim, L.A. Linden Levy, T. Liška, A. Litvinenko, H. Liu, L.D. Liu, M.X. Liu, V.-R. Loggins, S. Lokos, K. Lovasz, B. Love, R. Luechtenborg, D. Lynch, C.F. Maguire, T. Majoros, Y.I. Makdisi, M. Makek, M. Malaev, A. Malakhov, M.D. Malik, A. Manion, V.I. Manko, E. Mannel, Y. Mao, L. Mašek, H. Masuda, H. Masui, S. Masumoto, F. Matathias, M.C. McCain, M. McCumber, P.L. McGaughey, D. McGlinchey, C. McKinney, N. Means, A. Meles, M. Mendoza, B. Meredith, W.J. Metzger, Y. Miake, T. Mibe, J. Midori, A.C. Mignerey, D.E. Mihalik, P. Mikeš, K. Miki, A.J. Miller, T.E. Miller, A. Milov, S. Mioduszewski, D.K. Mishra, G.C. Mishra, M. Mishra, J.T. Mitchell, M. Mitrovski, G. Mitsuka, Y. Miyachi, S. Miyasaka, S. Mizuno, A.K. Mohanty, S. Mohapatra, P. Montuenga, H.J. Moon, T. Moon, Y. Morino, A. Morreale, D.P. Morrison, S.I.M. Morrow, M. Moskowitz, J.M. Moss, S. Motschwiller, T.V. Moukhanova, D. Mukhopadhyay, T. Murakami, J. Murata, A. Mwai, T. Nagae, K. Nagai, S. Nagamiya, K. Nagashima, T. Nagashima, Y. Nagata, J.L. Nagle, M. Naglis, M.I. Nagy, I. Nakagawa, H. Nakagomi, Y. Nakamiya, K.R. Nakamura, T. Nakamura, K. Nakano, S. Nam, C. Nattrass, A. Nederlof, P.K. Netrakanti, J. Newby, M. Nguyen, M. Nihashi, T. Niida, S. Nishimura, B.E. Norman, R. Nouicer, T. Novák, N. Novitzky, R. Novotny, A. Nukariya, A.S. Nyanin, J. Nystrand, C. Oakley, H. Obayashi, E. O'Brien, S.X. Oda, C.A. Ogilvie, H. Ohnishi, H. Oide, I.D. Ojha, M. Oka, K. Okada, O.O. Omiwade, Y. Onuki, J.D. Orjuela Koop, J.D. Osborn, A. Oskarsson, I. Otterlund, G.J. Ottino, M. Ouchida, K. Ozawa, R. Pak, D. Pal, A.P.T. Palounek, V. Pantuev, V. Papavassiliou, B.H. Park, I.H. Park, J. Park, J.S. Park, S. Park, S.K. Park, W.J. Park, S.F. Pate, L. Patel, M. Patel, H. Pei, J.-C. Peng, W. Peng, H. Pereira, D.V. Perepelitsa, G.D.N. Perera, V. Peresedov, D.Yu. Peressounko, C.E. PerezLara, J. Perry, R. Petti, M. Phipps, C. Pinkenburg, R. Pinson, R.P. Pisani, M. Proissl, A. Pun, M.L. Purschke, A.K. Purwar, H. Qu, P.V. Radzevich, J. Rak, A. Rakotozafindrabe, B.J. Ramson, I. Ravinovich, K.F. Read, S. Rembeczki, M. Reuter, K. Reygers, D. Reynolds, V. Riabov, Y. Riabov, E. Richardson, D. Richford, T. Rinn, N. Riveli, D. Roach, G. Roche, S.D. Rolnick, A. Romana, M. Rosati, C.A. Rosen, S.S.E. Rosendahl, P. Rosnet, Z. Rowan, J.G. Rubin, P. Rukoyatkin, J. Runchey, P. Ružička, V.L. Rykov, M.S. Ryu, S.S. Ryu, A.S. Safonov, B. Sahlmueller, N. Saito, T. Sakaguchi, S. Sakai, K. Sakashita, H. Sakata, H. Sako, V. Samsonov, M. Sano, S. Sano, M. Sarsour, H.D. Sato, K. Sato, S. Sato, T. Sato, M. Savastio, S. Sawada, B. Schaefer, B.K. Schmoll, K. Sedgwick, J. Seele, R. Seidl, Y. Sekiguchi, A.Yu. Semenov, V. Semenov, A. Sen, R. Seto, P. Sett, A. Sexton, D. Sharma, A. Shaver, T.K. Shea, I. Shein, A. Shevel, T.-A. Shibata, K. Shigaki, H.H. Shim, M. Shimomura, T. Shioya, T. Shohjoh, K. Shoji, P. Shukla, A. Sickles, C.L. Silva, D. Silvermyr, C. Silvestre, K.S. Sim, B.K. Singh, C.P. Singh, V. Singh, M.J. Skoby, M. Skolnik, S. Skutnik, M. Slunečka, K.L. Smith, W.C. Smith, M. Snowball, T. Sodre, S. Solano, A. Soldatov, R.A. Soltz, W.E. Sondheim, S.P. Sorensen, I.V. Sourikova, N.A. Sparks, F. Staley, P.W. Stankus, P. Steinberg, E. Stenlund, M. Stepanov, A. Ster, S.P. Stoll, M.R. Stone, T. Sugitate, C. Suire, A. Sukhanov, J.P. Sullivan, T. Sumita, J. Sun, S. Syed, J. Sziklai, T. Tabaru, S. Takagi, E.M. Takagui, A. Takahara, A. Takeda, A. Taketani, R. Tanabe, K.H. Tanaka, Y. Tanaka, S. Taneja, K. Tanida, M.J. Tannenbaum, S. Tarafdar, A. Taranenko, P. Tarján, G. Tarnai, E. Tennant, H. Themann, D. Thomas, T.L. Thomas, R. Tieulent, A. Timilsina, T. Todoroki, M. Togawa, A. Toia, J. Tojo, L. Tomášek, M. Tomášek, Y. Tomita, H. Torii, C.L. Towell, M. Towell, R. Towell, R.S. Towell, V.-N. Tram, I. Tserruya, Y. Tsuchimoto, T. Tsuji, S.K. Tuli, H. Tydesjö, N. Tyurin, Y. Ueda, B. Ujvari, K. Utsunomiya, C. Vale, H. Valle, H.W. van Hecke, M. Vargyas, S. Vazquez-Carson, E. Vazquez-Zambrano, A. Veicht, J. Velkovska, R. Vértesi, A.A. Vinogradov, M. Virius, B. Voas, A. Vossen, V. Vrba, N. Vukman, E. Vznuzdaev, M. Wagner, D. Walker, X.R. Wang, Z. Wang, D. Watanabe, K. Watanabe, Y. Watanabe, Y.S. Watanabe, F. Wei, R. Wei, J. Wessels, S. Whitaker, A.S. White, S.N. White, N. Willis, D. Winter, S. Wolin, C.P. Wong, J.P. Wood, C.L. Woody, R.M. Wright, M. Wysocki, B. Xia, W. Xie, C. Xu, Q. Xu, L. Xue, S. Yalcin, Y.L. Yamaguchi, H. Yamamoto, K. Yamaura, R. Yang, A. Yanovich, Z. Yasin, P. Yin, J. Ying, S. Yokkaichi, J.H. Yoo, J.S. Yoo, I. Yoon, Z. You, G.R. Young, I. Younus, H. Yu, I.E. Yushmanov, W.A. Zajc, O. Zaudtke, A. Zelenski, C. Zhang, S. Zharko, S. Zhou, J. Zimamyi, L. Zolin, and L. Zou
- Subjects
Nuclear and High Energy Physics - Published
- 2019
3. NEXO: Neutrinoless double beta decay search beyond $10^{28}$ year half-life sensitivity
- Author
-
G Adhikari, S Al Kharusi, E Angelico, G Anton, I J Arnquist, I Badhrees, J Bane, V Belov, E P Bernard, T Bhatta, A Bolotnikov, P A Breur, J P Brodsky, E Brown, T Brunner, E Caden, G F Cao, L Cao, C Chambers, B Chana, S A Charlebois, D Chernyak, M Chiu, B Cleveland, R Collister, S A Czyz, J Dalmasson, T Daniels, L Darroch, R DeVoe, M L Di Vacri, J Dilling, Y Y Ding, A Dolgolenko, M J Dolinski, A Dragone, J Echevers, M Elbeltagi, L Fabris, D Fairbank, W Fairbank, J Farine, S Ferrara, S Feyzbakhsh, Y S Fu, G Gallina, P Gautam, G Giacomini, W Gillis, C Gingras, D Goeldi, R Gornea, G Gratta, C A Hardy, K Harouaka, M Heffner, E W Hoppe, A House, A Iverson, A Jamil, M Jewell, X S Jiang, A Karelin, L J Kaufman, I Kotov, R Krücken, A Kuchenkov, K S Kumar, Y Lan, A Larson, K G Leach, B G Lenardo, D S Leonard, G Li, S Li, Z Li, C Licciardi, R Lindsay, R MacLellan, M Mahtab, P Martel-Dion, J Masbou, N Massacret, T McElroy, K McMichael, M Medina Peregrina, T Michel, B Mong, D C Moore, K Murray, J Nattress, C R Natzke, R J Newby, K Ni, F Nolet, O Nusair, J C Nzobadila Ondze, K Odgers, A Odian, J L Orrell, G S Ortega, C T Overman, S Parent, A Perna, A Piepke, A Pocar, J-F Pratte, N Priel, V Radeka, E Raguzin, G J Ramonnye, T Rao, H Rasiwala, S Rescia, F Retière, J Ringuette, V Riot, T Rossignol, P C Rowson, N Roy, R Saldanha, S Sangiorgio, X Shang, A K Soma, F Spadoni, V Stekhanov, X L Sun, M Tarka, S Thibado, A Tidball, J Todd, T Totev, S Triambak, R H M Tsang, T Tsang, F Vachon, V Veeraraghavan, S Viel, C Vivo-Vilches, P Vogel, J-L Vuilleumier, M Wagenpfeil, T Wager, M Walent, K Wamba, Q Wang, W Wei, L J Wen, U Wichoski, S Wilde, M Worcester, S X Wu, W H Wu, X Wu, Q Xia, W Yan, H Yang, L Yang, O Zeldovich, J Zhao, T Ziegler, Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), and nEXO
- Subjects
Nuclear and High Energy Physics ,background: effect ,Physics - Instrumentation and Detectors ,FOS: Physical sciences ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,time-projection chambers ,01 natural sciences ,neutrinoless double beta decay ,Monte Carlo simulations ,double-beta decay: (0neutrino) ,0103 physical sciences ,neutrino: mass ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Nuclear Experiment (nucl-ex) ,010306 general physics ,Nuclear Experiment ,detector: design ,xenon: liquid ,010308 nuclear & particles physics ,neutrinos ,Instrumentation and Detectors (physics.ins-det) ,sensitivity ,time projection chamber ,3. Good health ,photon: scintillation counter ,copper ,radioactivity ,Xe-136 ,experimental results - Abstract
The nEXO neutrinoless double beta decay experiment is designed to use a time projection chamber and 5000 kg of isotopically enriched liquid xenon to search for the decay in $^{136}$Xe. Progress in the detector design, paired with higher fidelity in its simulation and an advanced data analysis, based on the one used for the final results of EXO-200, produce a sensitivity prediction that exceeds the half-life of $10^{28}$ years. Specifically, improvements have been made in the understanding of production of scintillation photons and charge as well as of their transport and reconstruction in the detector. The more detailed knowledge of the detector construction has been paired with more assays for trace radioactivity in different materials. In particular, the use of custom electroformed copper is now incorporated in the design, leading to a substantial reduction in backgrounds from the intrinsic radioactivity of detector materials. Furthermore, a number of assumptions from previous sensitivity projections have gained further support from interim work validating the nEXO experiment concept. Together these improvements and updates suggest that the nEXO experiment will reach a half-life sensitivity of $1.35\times 10^{28}$ yr at 90% confidence level in 10 years of data taking, covering the parameter space associated with the inverted neutrino mass ordering, along with a significant portion of the parameter space for the normal ordering scenario, for almost all nuclear matrix elements. The effects of backgrounds deviating from the nominal values used for the projections are also illustrated, concluding that the nEXO design is robust against a number of imperfections of the model., Comment: 26 pages, 19 figures, version accepted by Journal of Phys. G
- Published
- 2021
- Full Text
- View/download PDF
4. Event Reconstruction in a Liquid Xenon Time Projection Chamber with an Optically-Open Field Cage
- Author
-
B. Chana, N. Roy, L. Cao, O. Nusair, G. St-Hilaire, Douglas H Beck, R. Krücken, F. Nolet, E. Raguzin, P. A. Breur, T. McElroy, T. Bhatta, L. J. Kaufman, Gerard Visser, D. Goeldi, M. Coon, Eric W. Hoppe, F. Vachon, Z. Li, C. Chambers, Veljko Radeka, Cory T. Overman, L. J. Wen, J. L. Vuilleumier, Samuele Sangiorgio, L. Darroch, P. Gautam, P. Nakarmi, Kaixuan Ni, K. S. Kumar, A. De St. Croix, R. Tsang, Haijun Yang, E. V. Hansen, P. Lv, E. Caden, S. X. Wu, J. Hößl, P. S. Barbeau, Lorenzo Fabris, I. J. Arnquist, R. Gornea, P. C. Rowson, V.N. Stekhanov, X. S. Jiang, C. Licciardi, A. Jamil, A. House, A. Piepke, J. Todd, G. Gallina, S. Thibado, Y. Y. Ding, A. Der Mesrobian-Kabakian, N. Massacret, M. Heffner, R. MacLellan, S. Viel, M. Worcester, Thilo Michel, V. Veeraraghavan, Qing Xia, M. Hughes, G. Li, Sergio Ferrara, S. Al Kharusi, R. DeVoe, A. Pocar, M. Walent, B. G. Lenardo, Arun Kumar Soma, S. Feyzbakhsh, Y. Lan, G. S. Ortega, B. T. Cleveland, K. Deslandes, T. Brunner, A. Kuchenkov, M. Medina-Peregrina, Serge A. Charlebois, F. Retiere, David Moore, M. Chiu, J. P. Brodsky, M. Tarka, F. Edaltafar, T. Wager, K. G. Leach, Wei Wu, R.J. Newby, Qun-Yao Wang, Zhijun Ning, M. Oriunno, Aleksey E. Bolotnikov, K. Murray, Gisela Anton, K. Odgers, B. Mong, M. J. Dolinski, David Leonard, Thomas Koffas, W. M. Fairbank, T. Tsang, T. Stiegler, Jean-Francois Pratte, Angelo Dragone, M. Elbeltagi, John L. Orrell, T. Daniels, Wei Wei, H. Rasiwala, I. Ostrovskiy, Yu-Guang Zhou, S. Rescia, D. Fairbank, Guofu Cao, Mike Richman, O. Njoya, T. I. Totev, A. Iverson, K. Skarpaas Viii, Shu Li, Giorgio Gratta, U. Wichoski, L. Yang, T. Rossignol, M. J. Jewell, A. Craycraft, T. Ziegler, Gabriele Giacomini, J. Echevers, Jens Dilling, C.R. Natzke, I. Badhrees, A. Tidball, M. L. di Vacri, C. Vivo-Vilches, S. Parent, A. Odian, O. Zeldovich, R. Saldanha, M. Wagenpfeil, J. Dalmasson, X.L. Sun, J. B. Zhao, X. F. Wu, A. Larson, Ethan Brown, A. Karelin, J. Farine, V. Belov, and A. Robinson
- Subjects
Physics ,Nuclear and High Energy Physics ,Scintillation ,Photon ,Time projection chamber ,Physics - Instrumentation and Detectors ,Field (physics) ,010308 nuclear & particles physics ,chemistry.chemical_element ,FOS: Physical sciences ,Instrumentation and Detectors (physics.ins-det) ,01 natural sciences ,Xenon ,chemistry ,Double beta decay ,Ionization ,0103 physical sciences ,Atomic physics ,010306 general physics ,Instrumentation ,Event reconstruction - Abstract
nEXO is a proposed tonne-scale neutrinoless double beta decay ($0\nu\beta\beta$) experiment using liquid ${}^{136}Xe$ (LXe) in a Time Projection Chamber (TPC) to read out ionization and scintillation signals. Between the field cage and the LXe vessel, a layer of LXe ("skin" LXe) is present, where no ionization signal is collected. Only scintillation photons are detected, owing to the lack of optical barrier around the field cage. In this work, we show that the light originating in the skin LXe region can be used to improve background discrimination by 5% over previous published estimates. This improvement comes from two elements. First, a fraction of the $\gamma$-ray background is removed by identifying light from interactions with an energy deposition in the skin LXe. Second, background from ${}^{222}Rn$ dissolved in the skin LXe can be efficiently rejected by tagging the $\alpha$ decay in the ${}^{214}Bi-{}^{214}Po$ chain in the skin LXe., Comment: 11 pages, 12 figures
- Published
- 2020
- Full Text
- View/download PDF
5. Measurement of material isotopics and atom number ratio with α-particle spectroscopy for a NIFFTE fission Time Projection Chamber actinide target
- Author
-
J. A. Magee, C. A. Hagmann, Fredrik Tovesson, C. Prokop, B. Seilhan, W. Loveland, Denise Neudecker, A. Kemnitz, Daniel James Higgins, Mateusz Monterial, Nikolaos Fotiades, D. Cebra, D. Hensle, M. Heffner, L. Yao, L. D. Isenhower, N. Walsh, T.S. Watson, Samuele Sangiorgio, Kyle Schmitt, J. Gearhart, M. P. Mendenhall, R. S. Towell, Brett Manning, Jonathan B. King, Nathaniel Bowden, T. Classen, Uwe Greife, Shea Mosby, E. Leal-Cidoncha, J. L. Klay, J. Bundgaard, L. Snyder, Walid Younes, Robert Casperson, V. Geppert-Kleinrath, D.H. Dongwi, Kareem Kazkaz, Joseph Latta, and M. Anastasiou
- Subjects
Physics ,Nuclear and High Energy Physics ,Time projection chamber ,Isotope ,Fission ,Analytical chemistry ,Atomic number ,Actinide ,Nuclear Experiment ,Mass spectrometry ,Spectroscopy ,Instrumentation ,Spectral line - Abstract
We present the results of a measurement of isotopic concentrations and atomic number ratio of a double-sided actinide target using α -spectroscopy and mass spectrometry. The double-sided actinide target, with predominantly 239Pu on one side and 235U on the other, was used in the fission Time Projection Chamber (fissionTPC) for a measurement of the neutron-induced fission cross-section ratio between the two isotopes. The measured atomic number ratio is needed to extract an absolute measurement fission cross-section ratio. The 239Pu/235U atom number ratio was measured with a combination of mass spectrometry and α -spectroscopy with a planar silicon detector achieving uncertainties of less than 1%. Different strategies for estimating isotopic concentration from the α -spectrum are presented to demonstrate the potential of these methods for non-destructive target assay. We found that a combination of fitting spectra with constraints from mass spectrometry, and summing counts in a region of the spectrum provided the most consistent results with the lowest uncertainty.
- Published
- 2022
6. Measurements of electron transport in liquid and gas Xenon using a laser-driven photocathode
- Author
-
R. Saldanha, I. Ostrovskiy, D. Kodroff, M. J. Dolinski, S. Rescia, John L. Orrell, T. Daniels, P. Gautam, D. Fairbank, Z. Li, E. Caden, E. V. Hansen, Gerard Visser, J. Watkins, Mike Richman, O. Njoya, R. MacLellan, He-Run Yang, A. Iverson, Triveni Rao, K. Skarpaas Viii, Liang Yang, R. Tsang, Gabriele Giacomini, A. Jamil, Pengpeng Lv, O. Nusair, R. Krücken, Shu Li, J. Echevers, Yu-Guang Zhou, Sergio Ferrara, B. Chana, Y. Lan, M. L. di Vacri, U. Wichoski, T. Wager, J. P. Brodsky, C. Vivo-Vilches, I. J. Arnquist, D. Beck, Thilo Michel, Y-R Yen, T. Tsang, T. Tolba, J. Runge, Yuehe Lin, T. Ziegler, Qun-Yao Wang, P. Nakarmi, Guofu Cao, M. Hughes, Jens Dilling, R. Fontaine, David Leonard, M. Heffner, Angelo Dragone, J. L. Vuilleumier, M. Walent, S. Al Kharusi, I. Badhrees, M. Tarka, Thomas Koffas, W. M. Fairbank, B. G. Lenardo, S. Viel, Arun Kumar Soma, T. Brunner, D. Goeldi, L. J. Kaufman, T. Stiegler, Samuele Sangiorgio, Xuan Wu, K. S. Kumar, S. Parent, M. Elbeltagi, M. Coon, K. G. Leach, David Moore, Wei Wei, Qing Xia, J. Farine, G. S. Ortega, Cory T. Overman, Wei Wu, R.J. Newby, P. C. Rowson, S. X. Wu, S. J. Daugherty, Serge A. Charlebois, A. House, G. St-Hilaire, S. Feyzbakhsh, P. S. Barbeau, A. Robinson, T. Bhatta, V. A. Belov, A.C. Odian, O. Zeldovich, Eric W. Hoppe, A. Piepke, J. Todd, L. Darroch, Y. Y. Ding, M. Oriunno, C. Chambers, A. Pocar, V.N. Stekhanov, B. T. Cleveland, T. Rossignol, A. Kuchenkov, M. J. Jewell, Veljko Radeka, X. S. Jiang, C. Licciardi, G. Gallina, A. Der Mesrobian-Kabakian, V. Veeraraghavan, A. Fucarino, Giorgio Gratta, M. Chiu, K. Murray, Gisela Anton, K. Odgers, E. Raguzin, J. Hossl, R. DeVoe, W. R. Cen, M. Medina-Peregrina, R. Gornea, F. Retiere, B. Mong, M. Wagenpfeil, J. Dalmasson, M. Ward, G. S. Li, X.L. Sun, J. B. Zhao, A. Larson, A. Craycraft, Ethan Brown, C.R. Natzke, A. Karelin, Jean-Francois Pratte, Z. Ning, T. I. Totev, A. De St. Croix, Lorenzo Fabris, N. Roy, L. Cao, F. Nolet, T. McElroy, F. Vachon, L. J. Wen, and Marc Weber
- Subjects
Nuclear and High Energy Physics ,Physics - Instrumentation and Detectors ,Physics::Instrumentation and Detectors ,FOS: Physical sciences ,chemistry.chemical_element ,Electron ,medicine.disease_cause ,7. Clean energy ,01 natural sciences ,Photocathode ,Xenon ,Electric field ,0103 physical sciences ,medicine ,Nuclear Experiment (nucl-ex) ,010306 general physics ,Instrumentation ,Nuclear Experiment ,Physics ,Argon ,010308 nuclear & particles physics ,Instrumentation and Detectors (physics.ins-det) ,Photoelectric effect ,chemistry ,Quantum efficiency ,High Energy Physics::Experiment ,Atomic physics ,Ultraviolet - Abstract
Measurements of electron drift properties in liquid and gaseous xenon are reported. The electrons are generated by the photoelectric effect in a semi-transparent gold photocathode driven in transmission mode with a pulsed ultraviolet laser. The charges drift and diffuse in a small chamber at various electric fields and a fixed drift distance of 2.0 cm. At an electric field of 0.5 kV/cm, the measured drift velocities and corresponding temperature coefficients respectively are 1 . 97 ± 0 . 04 m m ∕ μ s and ( − 0 . 69 ± 0 . 05 ) %/K for liquid xenon, and 1 . 42 ± 0 . 03 m m ∕ μ s and ( + 0 . 11 ± 0 . 01 ) %/K for gaseous xenon at 1.5 bar. In addition, we measure longitudinal diffusion coefficients of 25 . 7 ± 4 . 6 cm 2 /s and 149 ± 23 cm 2 /s, for liquid and gas, respectively. The quantum efficiency of the gold photocathode is studied at the photon energy of 4.73 eV in liquid and gaseous xenon, and vacuum. These charge transport properties and the behavior of photocathodes in a xenon environment are important in designing and calibrating future large scale noble liquid detectors.
- Published
- 2019
7. Characterization of the Hamamatsu VUV4 MPPCs for nEXO
- Author
-
P. Giampa, G. Li, D. Kodroff, M. Wagenpfeil, J. Dalmasson, Eric W. Hoppe, N. Roy, David Leonard, J. Blatchford, Thomas Koffas, E. V. Hansen, W. M. Fairbank, P. Gautam, B. T. Cleveland, K. Odgers, L. Cao, Liang Yang, A. Jamil, S. Rescia, T. Stiegler, E. Raguzin, M. Elbeltagi, R. MacLellan, A. Kuchenkov, Arun Kumar Soma, F. Nolet, X.L. Sun, T. Bhatta, D. Fairbank, J. B. Zhao, T. McElroy, A. Larson, Jean-Francois Pratte, B. Mong, F. Vachon, Marc Weber, G. St-Hilaire, P. Margetak, P. Nakarmi, M. Chiu, J. Farine, J. Echevers, C. Chambers, G. Zhang, M. Oriunno, P. C. Rowson, A. Robinson, I. J. Arnquist, S. X. Wu, Douglas H Beck, Qing Xia, U. Wichoski, Ethan Brown, A. House, K. Murray, Y-R Yen, L. Darroch, G. S. Ortega, R. DeVoe, Gisela Anton, T. Ziegler, O. Zeldovich, J. P. Brodsky, T. I. Totev, M. Heffner, Qun-Yao Wang, T. Tolba, W. R. Cen, S. J. Daugherty, A. De St. Croix, G. Gallina, R. Gornea, Serge A. Charlebois, T. Rossignol, Zhijun Ning, M. Tarka, M. J. Jewell, Lorenzo Fabris, J. L. Vuilleumier, M. Walent, John L. Orrell, T. Daniels, R. Tsang, B. G. Lenardo, T. Brunner, K. Skarpaas, P. Lv, V. Veeraraghavan, A. Karelin, J. Todd, Y. Y. Ding, O. Nusair, R. Krücken, Veljko Radeka, Wei Wu, R.J. Newby, M. Hughes, R. Saldanha, S. Al Kharusi, Giorgio Gratta, Martin Ward, He-Run Yang, David Moore, M. Alfaris, S. Feyzbakhsh, A. Craycraft, Y. Ito, L. J. Kaufman, Y. Lan, Yuehe Lin, Z. Li, Samuele Sangiorgio, Wei Wei, F. Retière, K. S. Kumar, J. Hößl, P. S. Barbeau, V. A. Belov, Thilo Michel, J. Kroeger, Xuan Wu, A. Pocar, A. Piepke, V.N. Stekhanov, D. Qiu, M. Coon, Cory T. Overman, T. Tsang, Angelo Dragone, Gabriele Giacomini, Jens Dilling, I. Badhrees, S. Parent, A. Odian, I. Ostrovskiy, Gerard Visser, Mike Richman, O. Njoya, A. Iverson, Shu Li, J. Watkins, M. Medina-Peregrina, X. S. Jiang, C. Licciardi, A. Der Mesrobian-Kabakian, Yu-Guang Zhou, Liangjian Wen, Luca Doria, Guofu Cao, Rejean Fontaine, and M. J. Dolinski
- Subjects
010302 applied physics ,Physics ,Nuclear and High Energy Physics ,Scintillation ,Physics - Instrumentation and Detectors ,010308 nuclear & particles physics ,Analytical chemistry ,FOS: Physical sciences ,chemistry.chemical_element ,Instrumentation and Detectors (physics.ins-det) ,01 natural sciences ,Xenon ,chemistry ,0103 physical sciences ,Saturation (graph theory) ,Astrophysics - Instrumentation and Methods for Astrophysics ,Instrumentation and Methods for Astrophysics (astro-ph.IM) ,Instrumentation ,Photon detection ,Dark current - Abstract
In this paper we report on the characterization of the Hamamatsu VUV4 (S/N: S13370-6152) Vacuum Ultra-Violet (VUV) sensitive Multi-Pixel Photon Counters (MPPC)s as part of the development of a solution for the detection of liquid xenon scintillation light for the nEXO experiment. Various MPPC features, such as: dark noise, gain, correlated avalanches, direct crosstalk and Photon Detection Efficiency (PDE) were measured in a dedicated setup at TRIUMF. MPPCs were characterized in the range 163 K ≤ T ≤ 233 K . At an over voltage of 3 . 1 ± 0 . 2 V and at T = 163 K we report a number of Correlated Avalanches (CAs) per pulse in the 1 μ s interval following the trigger pulse of 0 . 161 ± 0 . 005 . At the same settings the Dark-Noise (DN) rate is 0 . 137 ± 0 . 002 Hz/mm 2 . Both the number of CAs and the DN rate are within nEXO specifications. The PDE of the Hamamatsu VUV4 was measured for two different devices at T = 233 K for a mean wavelength of 189 ± 7 nm . At 3 . 6 ± 0 . 2 V and 3 . 5 ± 0 . 2 V of over voltage we report a PDE of 13 . 4 ± 2 . 6 % and 11 ± 2 % , corresponding to a saturation PDE of 14 . 8 ± 2 . 8 % and 12 . 2 ± 2 . 3 % , respectively. Both values are well below the 24 % saturation PDE advertised by Hamamatsu. More generally, the second device tested at 3 . 5 ± 0 . 2 V of over voltage is below the nEXO PDE requirement. The first one instead yields a PDE that is marginally close to meeting the nEXO specifications. This suggests that with modest improvements the Hamamatsu VUV4 MPPCs could be considered as an alternative to the FBK-LF Silicon Photo-Multipliers for the final design of the nEXO detector.
- Published
- 2019
8. Reflectance of Silicon Photomultipliers at Vacuum Ultraviolet Wavelengths
- Author
-
E. Caden, S. Rescia, D. Fairbank, G. St-Hilaire, Thilo Michel, A. Craycraft, Jens Dilling, I. Badhrees, A. De St. Croix, X. S. Jiang, C. Licciardi, J. Farine, M. Walent, S. Feyzbakhsh, V. Belov, C.R. Natzke, B. G. Lenardo, A. Robinson, P. Nakarmi, A. Der Mesrobian-Kabakian, T. Brunner, L. Darroch, J. Echevers, Xuan Wu, S. Parent, A. Odian, A. Fucarino, Jean-Francois Pratte, Yu-Guang Zhou, E. Raguzin, T. Rossignol, Z. Li, O. Nusair, J. L. Vuilleumier, R. Krücken, M. Hughes, V. Veeraraghavan, M. J. Jewell, R. Saldanha, T. I. Totev, P. A. Breur, K. Skarpaas, Gerard Visser, S. Al Kharusi, I. Ostrovskiy, B. T. Cleveland, A. Kuchenkov, Liangjian Wen, Luca Doria, Guofu Cao, Samuele Sangiorgio, Wei Wei, K. S. Kumar, Mike Richman, David Moore, O. Njoya, A. Iverson, T. Bhatta, M. Chiu, G. S. Li, Thomas Tsang, Shu Li, Y. Lan, B. Chana, Douglas H Beck, L. Yang, M. Oriunno, J. P. Brodsky, P. S. Barbeau, He-Run Yang, R. DeVoe, K. Murray, J. Watkins, M. Tarka, Gisela Anton, R. Tsang, M. L. di Vacri, K. Odgers, M. J. Dolinski, M. Medina-Peregrina, C. Vivo-Vilches, F. Retiere, U. Wichoski, Sergio Ferrara, O. Zeldovich, K. G. Leach, T. Ziegler, R. Gornea, K. Deslandes, David Leonard, Giorgio Gratta, Thomas Koffas, W. M. Fairbank, Wei Wu, R.J. Newby, P. C. Rowson, T. Stiegler, M. Elbeltagi, Lorenzo Fabris, J. Hobl, A. House, N. Roy, L. Cao, F. Nolet, N. Massacret, T. McElroy, S. X. Wu, F. Vachon, C. Chambers, R. MacLellan, A. Pocar, V.N. Stekhanov, P. Gautam, F. Edaltafar, D. Goeldi, M. Coon, I. J. Arnquist, J. Runge, Cory T. Overman, M. Heffner, S. Viel, G. Gallina, Angelo Dragone, Gabriele Giacomini, P. Lv, A. Piepke, J. Todd, Y. Y. Ding, Veljko Radeka, T. Wager, Qun-Yao Wang, Zhijun Ning, E. V. Hansen, A. Jamil, Arun Kumar Soma, Qing Xia, S. Byrne Mamahit, Ethan Brown, A. Karelin, G. S. Ortega, M. Wagenpfeil, J. Dalmasson, X.L. Sun, J. B. Zhao, A. Larson, Serge A. Charlebois, John L. Orrell, T. Daniels, B. Mong, L. J. Kaufman, and Eric W. Hoppe
- Subjects
Nuclear and High Energy Physics ,Materials science ,Physics - Instrumentation and Detectors ,Silicon ,chemistry.chemical_element ,Photodetector ,FOS: Physical sciences ,01 natural sciences ,7. Clean energy ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,Xenon ,Silicon photomultiplier ,0103 physical sciences ,Wafer ,Electrical and Electronic Engineering ,010308 nuclear & particles physics ,business.industry ,Instrumentation and Detectors (physics.ins-det) ,Nuclear Energy and Engineering ,chemistry ,Optoelectronics ,Diffuse reflection ,Photonics ,business ,Refractive index - Abstract
Characterization of the vacuum ultraviolet (VUV) reflectance of silicon photomultipliers (SiPMs) is important for large-scale SiPM-based photodetector systems. We report the angular dependence of the specular reflectance in a vacuum of SiPMs manufactured by Fondazionc Bruno Kessler (FBK) and Hamamatsu Photonics K.K. (HPK) over wavelengths ranging from 120 nm to 280 nm. Refractive index and extinction coefficient of the thin silicon-dioxide film deposited on the surface of the FBK SiPMs are derived from reflectance data of a FBK silicon wafer with the same deposited oxide film as SiPMs. The diffuse reflectance of SiPMs is also measured at 193 nm. We use the VUV spectral dependence of the optical constants to predict the reflectance of the FBK silicon wafer and FBK SiPMs in liquid xenon.
- Published
- 2019
- Full Text
- View/download PDF
9. VUV-sensitive Silicon Photomultipliers for Xenon Scintillation Light Detection in nEXO
- Author
-
A. Jamil, T. Ziegler, P. Hufschmidt, G. Li, L. Lupin-Jimenez, T. Michel, I. Ostrovskiy, F. Retiere, J. Schneider, M. Wagenpfeil, A. Alamre, J. B. Albert, G. Anton, I. J. Arnquist, I. Badhrees, P. S. Barbeau, D. Beck, V. Belov, T. Bhatta, F. Bourque, J. P. Brodsky, E. Brown, T. Brunner, A. Burenkov, G. F. Cao, L. Cao, W. R. Cen, C. Chambers, S. A. Charlebois, M. Chiu, B. Cleveland, M. Coon, M. Cote, A. Craycraft, W. Cree, J. Dalmasson, T. Daniels, L. Darroch, S. J. Daugherty, J. Daughhetee, S. Delaquis, A. Der Mesrobian-Kabakian, R. DeVoe, J. Dilling, Y. Y. Ding, M. J. Dolinski, A. Dragone, J. Echevers, L. Fabris, D. Fairbank, W. Fairbank, J. Farine, S. Feyzbakhsh, R. Fontaine, D. Fudenberg, G. Gallina, G. Giacomini, R. Gornea, G. Gratta, E. V. Hansen, D. Harris, M. Hasan, M. Heffner, J. HoBl, E. W. Hoppe, A. House, M. Hughes, Y. Ito, A. Iverson, C. Jessiman, M. J. Jewell, X. S. Jiang, A. Karelin, L. J. Kaufman, T. Koffas, S. Kravitz, R. Krucken, A. Kuchenkov, K. S. Kumar, Y. Lan, A. Larson, D. S. Leonard, S. Li, Z. Li, C. Licciardi, Y. H. Lin, P. Lv, R. MacLellan, B. Mong, D. C. Moore, K. Murray, R. J. Newby, Z. Ning, O. Njoya, F. Nolet, O. Nusair, K. Odgers, A. Odian, M. Oriunno, J. L. Orrell, G. S. Ortega, C. T. Overman, S. Parent, A. Piepke, A. Pocar, J.-F. Pratte, D. Qiu, V. Radeka, E. Raguzin, T. Rao, S. Rescia, A. Robinson, T. Rossignol, P. C. Rowson, N. Roy, R. Saldanha, S. Sangiorgio, S. Schmidt, A. Schubert, D. Sinclair, K. Skarpaas, A. K. Soma, G. St-Hilaire, V. Stekhanov, T. Stiegler, X. L. Sun, M. Tarka, J. Todd, T. Tolba, T. I. Totev, R. Tsang, T. Tsang, F. Vachon, B. Veenstra, V. Veeraraghavan, G. Visser, J.-L. Vuilleumier, Q. Wang, J. Watkins, M. Weber, W. Wei, L. J. Wen, U. Wichoski, G. Wrede, S. X. Wu, W. H. Wu, Q. Xia, L. Yang, Y.-R. Yen, O. Zeldovich, X. Zhang, J. Zhao, and Y. Zhou
- Subjects
Physics ,Nuclear and High Energy Physics ,Photomultiplier ,Scintillation ,Time projection chamber ,Physics - Instrumentation and Detectors ,010308 nuclear & particles physics ,business.industry ,Noble gas ,chemistry.chemical_element ,FOS: Physical sciences ,Instrumentation and Detectors (physics.ins-det) ,Avalanche photodiode ,01 natural sciences ,Optics ,Silicon photomultiplier ,Xenon ,Nuclear Energy and Engineering ,chemistry ,Double beta decay ,0103 physical sciences ,Electrical and Electronic Engineering ,010306 general physics ,business - Abstract
Future tonne-scale liquefied noble gas detectors depend on efficient light detection in the VUV range. In the past years Silicon Photomultipliers (SiPMs) have emerged as a valid alternative to standard photomultiplier tubes or large area avalanche photodiodes. The next generation double beta decay experiment, nEXO, with a 5 tonne liquid xenon time projection chamber, will use SiPMs for detecting the $178\,\text{nm}$ xenon scintillation light, in order to achieve an energy resolution of $\sigma / Q_{\beta\beta} = 1\, \%$. This paper presents recent measurements of the VUV-HD generation SiPMs from Fondazione Bruno Kessler in two complementary setups. It includes measurements of the photon detection efficiency with gaseous xenon scintillation light in a vacuum setup and dark measurements in a dry nitrogen gas setup. We report improved photon detection efficiency at $175\,\text{nm}$ compared to previous generation devices, that would meet the criteria of nEXO. Furthermore, we present the projected nEXO detector light collection and energy resolution that could be achieved by using these SiPMs., Comment: 11 pages, 13 figures, 2 tables
- Published
- 2018
- Full Text
- View/download PDF
10. Commissioning the NIFFTE Time Projection Chamber: Towards the 238U / 235U (n, f) Cross-section Ratio
- Author
-
Dwayne Towell, S. M. Grimes, Tony S. Hill, T. N. Massey, R. S. Towell, G. Tatishvili, R. Meharchand, J. L. Klay, R. T. Thornton, D. Isenhower, B. Wendt, S. Watson, Sean C. Stave, L. Snyder, J. Bundgaard, Eric Burgett, H. Qu, M. Cunningham, B. Seilhan, D. M. Asner, D. L. Duke, Samuele Sangiorgio, J. Ruz, W. Loveland, N. Kornilov, Uwe Greife, R. G. Baker, Lynn Wood, J. Deaven, M. Heffner, Alexander B Laptev, V. Kleinrath, and Fredrik Tovesson
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Cross section (physics) ,Time projection chamber ,Fission ,Nuclear data ,Neutron ,Tracking (particle physics) ,Performance results - Abstract
The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) collaboration is developing a Time Projection Chamber (TPC) to measure neutron-induced fission cross sections with unprecedented accuracy. Modifying TPC technology for nuclear physics applications is a challenging endeavor, and frequent testing and evaluation is required to ensure that all components are behaving as expected. In-beam tests of the NIFFTE TPC at the Los Alamos Neutron Science Center (LAN-SCE) commenced in 2010. An overview of the NIFFTE TPC experiments performed at LANSCE will be presented, along with preliminary performance results.
- Published
- 2014
11. A Compact, Flexible, High Channel Count DAQ Built From Off-the-Shelf Components
- Author
-
M. Heffner, Vincent J. Riot, and Lorenzo Fabris
- Subjects
Nuclear and High Energy Physics ,Engineering ,business.industry ,Preamplifier ,Data acquisition ,Nuclear Energy and Engineering ,Application-specific integrated circuit ,visual_art ,Nuclear electronics ,Electronic component ,visual_art.visual_art_medium ,Electronic engineering ,Electronics ,Electrical and Electronic Engineering ,Field-programmable gate array ,business ,Computer hardware ,Communication channel - Abstract
Medium to large channel count detectors are usually faced with a few unattractive options for data acquisition (DAQ). Small to medium-sized TPC experiments, for example, are too small to justify the expense and development time of application specific integrated circuits (ASIC). Commercial rack mounted electronics are too bulky and expensive for large channel counts. The combination of commercial high-speed high-density FPGAs, ADCs, and small discrete components provides another option that scales to tens of thousands of channels and is only slightly larger than ASICs using off-the-shelf components. A working example of this alternative solution is presented.
- Published
- 2013
12. Measuring the α/SF Branching Ratio of 252Cf with the NIFFTE TPC
- Author
-
S. Watson, M. Cunningham, W. Loveland, N. Kornilov, Samuele Sangiorgio, S. M. Grimes, D. L. Duke, R. G. Baker, Eric Burgett, Alexander B Laptev, J. L. Klay, Lynn Wood, Fredrik Tovesson, M. Heffner, D. M. Asner, G. Tatishvili, D. Isenhower, J. Bundgaard, J. Ruz, V. Kleinrath, J. Deaven, T. N. Massey, Uwe Greife, L. Snyder, Dwayne Towell, Sean C. Stave, B. Seilhan, R. Meharchand, B. Wendt, R. S. Towell, R. T. Thornton, Tony S. Hill, and H. Qu
- Subjects
Physics ,Nuclear and High Energy Physics ,Physics::Instrumentation and Detectors ,Branching fraction ,Fission ,Nuclear Theory ,Nuclear data ,Actinide ,Tracking (particle physics) ,Charged particle ,Nuclear physics ,Neutron ,Nuclear Experiment ,Spontaneous fission - Abstract
A fission TPC is being developed to measure the energy-dependent neutron induced fission cross sections of the major and minor actinides to an accuracy of better than 1%. Achieving such an accuracy will depend in part, on the ability of the TPC to provide precise tracking and identification of charged particles. A measurement of the α -decay to spontaneous fission branching ratio of 252 Cf used to benchmark the performance of the TPC will be discussed.
- Published
- 2014
13. The Data Analysis Framework for the NIFFTE Fission Time Projection Chamber
- Author
-
L. Snyder, Sean C. Stave, Dwayne Towell, R. Meharchand, H. Qu, B. Seilhan, B. Wendt, T. N. Massey, W. Loveland, N. Kornilov, R. G. Baker, Tony S. Hill, V. Kleinrath, Lynn Wood, G. Tatishvili, Eric Burgett, S. M. Grimes, Samuele Sangiorgio, Fredrik Tovesson, J. Bundgaard, J. L. Klay, R. T. Thornton, R. S. Towell, M. Heffner, S. Watson, M. Cunningham, D. Isenhower, D. L. Duke, Alexander B Laptev, J. Deaven, J. Ruz, Uwe Greife, and D. M. Asner
- Subjects
Nuclear physics ,Nuclear and High Energy Physics ,Time projection chamber ,Traverse ,Computer science ,Fission ,Nuclear data ,Analysis software ,Tracking (particle physics) - Abstract
The NIFFTE collaboration has developed a time projection chamber to study neutron-induced fission events in actinide targets by tracking and identifying fission fragments in three dimensions as they traverse a gas volume. This paper will provide an overview of the analysis software that has been developed by the NIFFTE collaboration, as well as examples of its success in analyzing data.
- Published
- 2014
14. An Ethernet-based Data Acquisition System for the NIFFTE Time Projection Chamber
- Author
-
S. Watson, J. Deaven, D. M. Asner, G. Tatishvili, M. Cunningham, Eric Burgett, J. Ruz, Alexander B Laptev, T. N. Massey, W. Loveland, N. Kornilov, Uwe Greife, S. M. Grimes, R. G. Baker, M. Heffner, L. Snyder, Samuele Sangiorgio, J. L. Klay, H. Qu, Fredrik Tovesson, Sean C. Stave, B. Seilhan, Lynn Wood, V. Kleinrath, B. Wendt, R. T. Thornton, Dwayne Towell, Tony S. Hill, R. S. Towell, R. Meharchand, D. L. Duke, D. Isenhower, and J. Bundgaard
- Subjects
Ethernet ,Flexibility (engineering) ,Nuclear and High Energy Physics ,Time projection chamber ,business.industry ,Computer science ,Preamplifier ,Nuclear physics ,Data acquisition ,Application-specific integrated circuit ,Field-programmable gate array ,business ,Computer hardware ,Communication channel - Abstract
When fully instrumented, the NIFFTE Time Projection Chamber will consist of nearly 6000 channels, each of which requires a preamplifier, ADC, and digital readout. To minimize channel cost and size, the EtherDAQ data acquisition system utilizes off-the-shelf FPGA and Ethernet fiber technology. This application of commercially-available components made it possible to meet the requirements of the DAQ system with considerably less development cost and time than the a customized ASIC solution, and provides considerable flexibility in the final design. The detailed design and current status of the preamplifier and EtherDAQ boards will be discussed.
- Published
- 2014
15. Targets for Precision Measurements
- Author
-
Eric Burgett, Alexander B Laptev, J. Bundgaard, S. Watson, J. L. Klay, J. Deaven, Fredrik Tovesson, R. T. Thornton, M. Cunningham, B. Selhan, H. Qu, M. Heffner, Tony S. Hill, D. M. Asner, Uwe Greife, D. Isenhower, R. S. Towell, W. Loveland, N. Kornilov, Samuele Sangiorgio, G. Tatishvili, R. G. Baker, Lynn Wood, D. L. Duke, J. Ruz, Thomas N. Massey, L. Yao, V. Kleinrath, L. Snyder, B. Wendt, Dwayne Towell, Steven M. Grimes, Sean C. Stave, and R. Meharchand
- Subjects
Nuclear and High Energy Physics ,Physics - Instrumentation and Detectors ,Materials science ,Fission ,FOS: Physical sciences ,Nuclear data ,Instrumentation and Detectors (physics.ins-det) ,Actinide ,Term (time) ,Nuclear physics ,Irradiation ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,Energy (signal processing) - Abstract
The general properties needed in targets (sources) for high precision, high accuracy measurements are reviewed. The application of these principles to the problem of developing targets for the Fission TPC is described. Longer term issues, such as the availability of actinide materials, improved knowledge of energy losses and straggling and the stability of targets during irradiation are also discussed.
- Published
- 2014
16. Gamma-ray multiplicity measurement of the spontaneous fission of 252Cf in a segmented HPGe/BGO detector array
- Author
-
Eric B. Norman, M. Heffner, Jason Burke, M. A. Stoyer, D. L. Bleuel, Nicholas Scielzo, L. W. Phair, J. Gibelin, M. Wiedeking, Steven Sheets, N J Snyderman, L. A. Bernstein, and J. Mintz
- Subjects
Nuclear reaction ,Physics ,Nuclear and High Energy Physics ,Fission ,Astrophysics::High Energy Astrophysical Phenomena ,Gamma ray ,Semiconductor detector ,Nuclear physics ,Neutron ,Multiplicity (chemistry) ,Nuclear Experiment ,Instrumentation ,Radioactive decay ,Spontaneous fission - Abstract
Coincident γ rays from a 252Cf source were measured using an array of six segmented high-purity germanium (HPGe) Clover detectors each enclosed by 16 bismuth-germanate (BGO) detectors. The detectors were arranged in a cubic pattern around a 1 μ Ci 252Cf source to cover a large solid angle for γ ‐ray measurement with a reasonable reconstruction of the multiplicity. Neutron multiplicity was determined in certain cases by identifying the prompt γ rays from individual fission fragment pairs. Multiplicity distributions from previous experiments and theoretical models were convolved with the response function of the array and compared to the present results. These results suggest a γ ‐ray multiplicity spectrum broader than previous measurements and models, and provide no evidence of correlation with neutron multiplicity.
- Published
- 2010
17. Photoproduction of J/ψ and of high mass e+e− in ultra-peripheral Au + Au collisions at sNN=200 GeV
- Author
-
T. L. Thomas, R. Vértesi, Masamichi Ishihara, Kensuke Homma, J. M. Heuser, Ryugo S. Hayano, J. Gosset, M. Gonin, J. P. Sullivan, S. Chernichenko, Y. Riabov, Minghui Liu, Kenta Shigaki, H. Lim, K. Hasuko, B. Bassalleck, M. Nguyen, A. S. Nyanin, Hiroyuki Okada, K. Kurita, M. Heffner, Kenneth Francis Read, T. Ichihara, H. Pereira, J. Murata, J. Chiba, M. Konno, J. M. Burward-Hoy, Joakim Nystrand, Eva Haslum, P. Tarján, G. C. Mishra, E. J. Desmond, Takao Sakaguchi, M. Togawa, S. Kelly, V. Bumazhnov, M. P. Comets, J. Park, Y. J. Kwon, W. C. Smith, Florian Bauer, S. Bathe, S. Yokkaichi, N. N. Ajitanand, C. Klein-Boesing, Y. Tsuchimoto, A. D. Frawley, Robert F. Hobbs, M. Rosati, T. Tabaru, J. L. Drachenberg, Y. Berdnikov, I. E. Yushmanov, Eun-Hee Kim, S. Y. Fung, M. K. Lee, Takahiro Nakamura, Alexei Khanzadeev, I. Tserruya, T. V. Moukhanova, S. H. Aronson, Y. Akiba, S. Nagamiya, J. T. Mitchell, S. Kametani, Senta Greene, S. P. Sorensen, Yu. Efremenko, B. Komkov, Hans-Åke Gustafsson, A. A. Vinogradov, K. Das, Henrik Tydesjö, T. Shohjoh, A. Ster, W. Holzmann, Kazuhiro Tanaka, C. A. Ogilvie, Jiangyong Jia, Tadaaki Isobe, Vladislav Manko, Evert Anders Stenlund, Debashish Pal, V. Singh, J. S. Chai, Norio Saito, T. K. Hemmick, M. A. L. Leite, A. Durum, J. H. Kang, J. S. Haggerty, S. Sawada, E. P. Hartouni, A. Hadj Henni, J. Newby, G. Roche, Yasuo Miake, Maya Hachiya Shimomura, B. E. Norman, Y. Tanaka, A. Franz, Y. Goto, John Hill, H. A. Torii, L. Kochenda, Y. I. Makdisi, A. Romana, E. O'Brien, P. L. McGaughey, D. S. Brown, M. N. Hagiwara, Wei Xie, Shingo Sakai, C. L. Woody, S. Gadrat, Toru Sugitate, T. Kawagishi, B. Azmoun, J. G. Lajoie, T. Hachiya, David D'Enterria, R. A. Soltz, H. Borel, A. V. Kazantsev, C. Vale, Ingvar Otterlund, B. Espagnon, Klaus Johannes Reygers, Anders Nils Erik Oskarsson, I. J. Choi, Christine Angela Aidala, M. J. Tannenbaum, S. Batsouli, M. Grosse Perdekamp, V. Babintsev, L. D. Isenhower, Hiroaki Ohnishi, T. K. Shea, R. P. Pisani, A. Taranenko, D. Mukhopadhyay, M. J. Kweon, G. S. Kyle, François Fleuret, N. Kamihara, F. Matathias, R. Armendariz, O. Dietzsch, H. Valle, D. Bucher, N. Willis, D. E. Fields, I. V. Sourikova, Osamu Jinnouchi, Y. Le Bornec, B. V. Jacak, S. V. Afanasiev, L. Aphecetche, James Alexander, Matthew G. Reuter, A. Drees, T. C. Awes, Kyoichiro Ozawa, R. Averbeck, Byung-Sik Hong, Nikolay Tyurin, M. C. McCain, J. G. Boissevain, A. Bazilevsky, M. N. Wagner, Masashi Kaneta, B. Forestier, M. T. Bjorndal, I. D. Ojha, Alexander Malakhov, A. K. Purwar, Julia Velkovska, J. Egdemir, A. P.T. Palounek, H. Pei, M. Wysocki, D. Winter, D. Silvermyr, D. Yu Peressounko, P. Rosnet, Y. Fukao, Xingguo Li, Alexandre Lebedev, D. M. Lee, L. S. Zolin, C. Pinkenburg, Johannes Peter Wessels, M. Csanad, S. P. Stoll, W. J. Park, R. S. Towell, S. S.E. Rosendahl, G. Bunce, P. D. Barnes, A. Yanovich, M. Stepanov, Akio Kiyomichi, C. Zhang, Hirohiko Sato, A. Dion, M. Issah, S. F. Pate, D. Jouan, Margaret Harvey, V-N. Tram, S. N. White, N. Kurihara, M. D. Malik, E. Vznuzdaev, S. K. Tuli, Viktor Riabov, Motoi Inaba, M. G. Hur, C. Y. Chi, Charles Maguire, S. Leckey, C. R. Cleven, W. E. Sondheim, V. Papavassiliou, K. Boyle, P. A. Rukoyatkin, S. Belikov, K. S. Joo, W. A. Zajc, Josh Moss, J. E. Frantz, H. W. Van Hecke, V. Baublis, A. Denisov, V. Cianciolo, Jen-Chieh Peng, E. Kistenev, P. J. Kroon, Sergey Fokin, C. P. Singh, T. Horaguchi, B. M. Johnson, H. Harada, S. Esumi, A. Kiss, D. Sharma, A. Glenn, A. Taketani, Xiong Wang, Z. Conesa del Valle, K. S. Sim, Steven E. Skutnik, Henner Buesching, Dong Jo Kim, Martin Purschke, F. Gastineau, V. L. Rykov, T. Dahms, A. Isupov, C. Suire, H. Qu, D. Kotchetkov, Hideki Hamagaki, K. Aoki, G. David, Junji Tojo, Z. Fraenkel, Alexander Milov, N. Grau, J. Sziklai, K. Shoji, I. Ravinovich, O. Drapier, P. W. Stankus, E. R. Kinney, Brian Cole, D. P. Morrison, S. Campbell, V. E. Semenov, J. Zimányi, Tatsuya Chujo, Y. Nagata, H. Hiejima, S. S. Ryu, Saskia Mioduszewski, K. Imai, R. Bennett, Ahmed Al-Jamel, J. Jin, E. M. Takagui, O. Zaudtke, Jan Rak, R. Lacey, R. Granier de Cassagnac, Y. Cobigo, Anne Marie Sickles, G. R. Young, M. Naglis, C. L. Silva, V. S. Pantuev, Susumu Sato, S. Butsyk, Vladimir Samsonov, Tamas Ferenc Csorgo, K. Okada, J. L. Nagle, B. Sahlmueller, H. En'yo, P. Constantin, M. J. Leitch, F. Staley, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, K. Tanida, V. I. Kochetkov, Gerd Joachim Kunde, I. Shein, X. He, O. O. Omiwade, V. Peresedov, H. Masui, A. K. Dubey, S. Takagi, K. N. Barish, Taku Gunji, F. Kajihara, H. Delagrange, A. Baldisseri, Y. S. Kim, T. E. Miller, A. Enokizono, M. Holmes, M. Chiu, T. A. Shibata, M. L. Brooks, D. Isenhower, Marie Germain, A. G. Litvinenko, A. Kozlov, R. Seto, K. Haruna, and V. Dzhordzhadze
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,0103 physical sciences ,High mass ,High Energy Physics::Experiment ,Neutron ,Coulomb excitation ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider ,01 natural sciences - Abstract
We present the first measurement of photoproduction of J/psi and of two-photon production of high-mass e(+)e(-) pairs in electromagnetic (or ultra-peripheral) nucleus-nucleus interactions, using Au + Au data at root s(NN) = 200 GeV. The events are tagged with forward neutrons emitted following Coulomb excitation of one or both Au* nuclei. The event sample consists of 28 events with m(e+e-) > 2 GeV/c(2) with zero like-sign background. The measured cross sections at midrapidity of d sigma/dy (J/psi + Xn, y = 0) = 76 +/- 33 (stat) +/- 11 (syst) pb and d(2)sigma /dm dy (e(+) e(-) + Xn, y = 0) = 86 +/- 23(stat) +/- 16(syst) mu b/ (GeV/c(2)) for m(e+e-) epsilon vertical bar 2.0, 2.8 vertical bar GeV/c(2) have been compared and found to be consistent with models for photoproduction of J/psi and QED based calculations of two-photon production of e(+)e(-) pairs. (C) 2009 Elsevier B.V. All rights reserved.
- Published
- 2009
18. Directional Neutron Detection Using a Time Projection Chamber
- Author
-
A. Myers, Igor Jovanovic, L. Rosenberg, M. Hotz, M. Howe, N. S. Bowden, Michael Foxe, A. Bernstein, M. Heffner, Celeste Winant, and D. Carter
- Subjects
Physics ,Nuclear and High Energy Physics ,Time projection chamber ,Fissile material ,Physics::Instrumentation and Detectors ,business.industry ,Special nuclear material ,Detector ,Nuclear material ,Neutron temperature ,Nuclear physics ,Optics ,Nuclear Energy and Engineering ,Neutron detection ,Electrical and Electronic Engineering ,Nuclear Experiment ,business ,Projection (set theory) - Abstract
Time projection chambers offer unique capabilities for detection of fast neutrons from special nuclear material. We have demonstrated a directional detector for fast neutrons based on a hydrogen-filled time projection chamber. Experimental results for imaging of a fissile material surrogate 252Cf source are presented. Strategies for background rejection via particle identification are discussed.
- Published
- 2009
19. 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
20. Ionization imaging—A new method to search for 0-ν ββ decay
- Author
-
D. R. Nygren, W. Chinowski, Adam Bernstein, A. Goldschmidt, J.E. Millaud, and M. Heffner
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Time projection chamber ,Ionization ,Double beta decay ,Fiducial marker ,Tracking (particle physics) ,Neutral particle ,Instrumentation ,Charged particle ,Event reconstruction - Abstract
We present a new method to search for 0-ν ββ decay in 136Xe, the Ionization Imaging Chamber. This concept is based on 3-D track reconstruction by detection of ionization, without avalanche gain, in a novel time projection chamber (TPC) geometry. The rejection efficiency of external charged particle backgrounds is optimized by the realization of a maximal, fully active, closed, and ex post facto variable fiducial surface. Event localization within the fiducial volume and detailed event reconstruction mitigate external neutral particle backgrounds; larger detectors offer higher rejection efficiencies. Energy resolution at the Q-value of 2.5 MeV is expected to be better than 1% FWHM, reducing the potential impact of allowed 2-ν ββ decays. Scaling from ∼25 kg prototype to 1000+ kg target mass is graceful. A new possible methodology for the identification of the daughter barium nucleus is also described.
- Published
- 2007
21. 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
22. Systematic study of charged-pion and kaon femtoscopy in Au + Au collisions atsNN=200GeV
- Author
-
N. N. Ajitanand, G. D. N. Perera, Takahiro Nakamura, Susumu Oda, A. Durum, K. Yamaura, Taku Gunji, H. Gong, J. Seele, M. Patel, F. Kajihara, Y. Onuki, I. Tserruya, M. Jezghani, Yu. Efremenko, S. Butsyk, V. Singh, S. Zhou, Jan Rak, R. Lacey, S. D. Rolnick, D. Danley, Hongfang Liu, D. E. Fields, B. V. Jacak, T. Koblesky, M. McCumber, J. Hanks, Ajit Kumar Mohanty, T. A. Shibata, R. Granier de Cassagnac, A. Adare, T. Sato, A. Glenn, D. Isenhower, A. Toia, T. Moon, Eunja Kim, Jongmin Lee, Z. Rowan, M. Mendoza, S. N. White, S. Hasegawa, F. Matathias, H. Pei, M. Gonin, S. Kametani, D. Lynch, A. Sukhanov, K. Kurita, H. Pereira, Kensuke Homma, E. Richardson, N. S. Bandara, Y. Morino, Henner Buesching, M. Naglis, H. Nakagomi, Steve Edwards, T. Hoshino, C. O. Kim, R. Pak, A. Taketani, Zvi Hirsh Citron, M. S. Daugherity, C. P. Singh, Marcus Hohlmann, Vladimir Samsonov, P. Constantin, T. Dahms, L. A. Linden Levy, B. M. Johnson, Christine Nattrass, Johannes Peter Wessels, Masayasu Ishihara, A. K. Purwar, K. Fujiwara, H. A. Gustafsson, T. Todoroki, C. Zhang, R. J. Petti, H. Ge, K. B. Lee, B. Bassalleck, K. Nakano, I. Ravinovich, J. H. Do, C. L. Towell, P. Ružička, E. Leitner, D. Roach, K. M. Kijima, A. Isupov, B. Kimelman, K. Hashimoto, M. Konno, Xingguo Li, S. Mizuno, S. P. Sorensen, A. Yu. Semenov, Viktor Riabov, Kei Nagashima, O. Chvala, Seong H. Kim, G. W. Kim, P. Chung, M. Beaumier, K. S. Joo, J. G. Lajoie, M. Alfred, T. Hachiya, Jennifer E. Perry, H. W. Van Hecke, A. Kravitz, Raphael Noel Tieulent, S. Afanasiev, J. P. Wood, N. Feege, Susumu Sato, W. E. Sondheim, M. Bai, Alexander Milov, I. Nakagawa, R. Luechtenborg, J. Sziklai, A. Datta, H. Asano, T. Engelmore, Tamas Ferenc Csorgo, O. Drapier, Frank Ellinghaus, S. Bathe, Alice Mignerey, S. Miyasaka, S. Esumi, Agneta Oskarsson, E. R. Kinney, D. P. Morrison, Takao Sakaguchi, A. Sen, Y. Berdnikov, S. H. Lee, A. D. Frawley, J. L. Nagle, K. S. Sim, A. S. White, S. Huang, D. Hornback, Tatsuya Chujo, Y. Akiba, C. McKinney, M. Mishra, Jen-Chieh Peng, J. G. Rubin, W. Holzmann, Serpil Yalcin, S. Nagamiya, H. F. Hamilton, Maya Hachiya Shimomura, R. S. Hollis, Y. I. Makdisi, R. Yang, X. He, K. Boyle, Brian Cole, D. Reynolds, A. Taranenko, Vaclav Vrba, Klaus Johannes Reygers, Inkyu Park, M. J. Tannenbaum, H. Torii, B. K. Schmoll, Xiong Wang, Jaehyeok Yoo, W. A. Zajc, L. Xue, Rui Wei, K. Imai, V. Baublis, D. Sharma, A. Denisov, Yuki Watanabe, Kazushi Miki, V. Cianciolo, Dong Jo Kim, Brajesh K. Singh, Sergey Fokin, K. Karatsu, P. A. Rukoyatkin, J. D. Osborn, Inseok Yoon, Zhiying You, Anne Marie Sickles, B. Schaefer, L. Zou, J. S. Bok, D. Kotchetkov, Y. Aramaki, M. Wysocki, R. Bennett, M. Kawashima, V. Peresedov, G. R. Young, M. Finger, S. Dairaku, M. Stepanov, C. L. Woody, A. Berdnikov, S. Tarafdar, Minghui Liu, Eva Haslum, B. Lenzi, J. Koster, M. Heffner, C. Silvestre, Kenneth Francis Read, Marisilvia Donadelli, V. Bumazhnov, M. Virius, Min Soo Kim, R. Tanabe, H. Masui, A. A. Bickley, Rushan Han, J. D. Orjuela Koop, C. H. Chen, A. Veicht, A. Mwai, A. Manion, Petr Gallus, J. Bryslawskyj, C. L. Silva, Beomkyu Kim, Wei Xie, M. Snowball, Y. Tanaka, I. J. Choi, B. Xia, E. Mannel, I. V. Sourikova, R. A. Soltz, M. Grosse Perdekamp, F. Giordano, M. E. Connors, S. K. Park, M. I. Nagy, D. Watanabe, Nagahiro Saito, T. Novák, M. D. Malik, E. Vznuzdaev, Peter Christiansen, M. Kurosawa, L. Baksay, A. Deshpande, D. Winter, D. Yu Peressounko, J. T. Mitchell, Y. Watanabe, N. Hotvedt, I. Younus, R. Seidl, Vladislav Manko, Hai Yu, K. N. Barish, D. Kawall, H. Themann, M. Slunečka, Dennis Perepelitsa, S. Belikov, J. Murata, Gerd Joachim Kunde, I. Shein, C. Vale, K. Sedgwick, Tadaaki Isobe, S. Sano, Mihael Makek, A. Timilsina, Y. Nakamiya, G. Baksay, Charles Maguire, B. Sahlmueller, M. L. Brooks, P. L. McGaughey, Y. J. Kim, Kiyoshi Tanida, E. Kistenev, J. Sun, T. Murakami, J. Jin, S. Beckman, E. M. Takagui, Shunji Nishimura, K. A. Drees, J. Klatsky, B. Love, Y. L. Yamaguchi, K. Das, E. P. Hartouni, A. G. Litvinenko, A. V. Kazantsev, A. Sexton, A. Kozlov, R. Seto, I. Danchev, L. Tomášek, P. Mikeš, R. S. Towell, I. Garishvili, F. Wei, Kyeongpil Lee, J. Ide, T. Sumita, T. C. Awes, Kyoichiro Ozawa, T. Liška, M. Ouchida, N. Means, C. Y. Chi, S. Sawada, J. Ying, B. Meredith, T. L. Thomas, John Hill, A. Franz, Toru Sugitate, Ryugo S. Hayano, Y. Riabov, Kenta Shigaki, M. Rosati, François Fleuret, T. Ichihara, M. Tomášek, Takahiro Fusayasu, M. Nguyen, Alexander Malakhov, D. Silvermyr, L. S. Zolin, W. J. Park, Christopher Rosen, A. S. Nyanin, G. S. Kyle, A. Yanovich, A. A. Vinogradov, Rachid Nouicer, A. N. Zelenski, M. Proissl, P. Sett, James Alexander, Jiangyong Jia, Y. Goto, R. Averbeck, D. Kleinjan, S. Campbell, Byung-Sik Hong, A. Bazilevsky, Philippe Rosnet, Alexei Khanzadeev, O. Dietzsch, E. T. Atomssa, H. Valle, Alexandre Lebedev, E. Stenlund, C. Baumann, Takafumi Niida, J. Huang, Dipanwita Dutta, C. Gal, P. Tarján, D. M. Lee, Julia Velkovska, J. B. Choi, Prakhar Garg, Senta Greene, A. T. Basye, B. Fadem, E. O'Brien, B. Bannier, Dipak Kumar Mishra, K. Kiriluk, B. Komkov, K. Watanabe, Y. Fukao, K. Shoji, M. A. L. Leite, T. Hester, S. Kanda, T. Horaguchi, T. V. Moukhanova, P. W. Stankus, N. A. Sparks, S. Yokkaichi, S. H. Lim, R. Belmont, J. S. Kapustinsky, N. Grau, V. Babintsev, Y. Ikeda, T. Rinn, Motoi Inaba, C. Pinkenburg, K. Dehmelt, R. M. Wright, G. Roche, Y. J. Mao, J. H. Kang, J. S. Haggerty, Su Houng Lee, Y. S. Lai, K. Sakashita, D. Kotov, D. S. Jumper, Jason Kamin, V. S. Pantuev, S. P. Stoll, S. S.E. Rosendahl, J. Hamblen, G. Bunce, R. Kitamura, D. Jouan, X. Jiang, K. Okada, N. Kamihara, D. McGlinchey, N. Apadula, A. Meles, A. Drees, H. En'yo, M. J. Leitch, M. Chiu, C. A. Ogilvie, T. K. Hemmick, B. J. Ramson, J. M. Durham, Yasuo Miake, K. DeBlasio, L. Kochenda, M. Issah, R. Pinson, Hiroyuki Sako, M. Sarsour, Mate Csanad, A. Iordanova, R. Ichimiya, S. Y. Han, Y. J. Kwon, P. Montuenga, Martin Purschke, C. A. Aidala, Pawan Kumar Netrakanti, T. Kempel, Dong-Hun Kim, A. Morreale, Z. Fraenkel, V. Khachatryan, T. O. S. Haseler, H. Qu, P. B. Diss, R. K. Choudhury, Hideki Hamagaki, K. Aoki, G. David, K. I. Hahn, B. Azmoun, A. Král, N. Novitzky, R. P. Pisani, M. Oka, P. Kline, K. S. Lee, A. Dion, A. Enokizono, P. Liebing, C. M. Camacho, Prashant Shukla, S. F. Pate, H. Al-Bataineh, J. A. Key, Dmitry Blau, D. Ivanishchev, V. Papavassiliou, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, J. S. Park, J. Park, A. Rakotozafindrabe, Y. Tsuchimoto, I. E. Yushmanov, Eun-Hee Kim, R. Vértesi, Jason Newby, J. E. Frantz, and Sung Keun Park
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Nuclear Theory ,Charged particle ,Momentum ,Nuclear physics ,Pion ,Charge radius ,Transverse mass ,High Energy Physics::Experiment ,Astrophysics::Earth and Planetary Astrophysics ,Impact parameter ,Nuclear Experiment ,Relativistic Heavy Ion Collider ,Event (particle physics) - Abstract
We present a systematic study of charged-pion and kaon interferometry in Au + Au collisions at root s(NN) = 200 GeV. The kaon mean source radii are found to be larger than pion radii in the outward and longitudinal directions for the same transverse mass; this difference increases for more central collisions. The azimuthal-angle dependence of the radii was measured with respect to the second-order event plane and similar oscillations of the source radii were found for pions and kaons. Hydrodynamic models qualitatively describe the similar oscillations of the mean source radii for pions and kaons, but they do not fully describe the transverse-mass dependence of the oscillations.
- Published
- 2015
23. Systematic study of azimuthal anisotropy in Cu + Cu and Au + Au collisions atsNN=62.4and 200 GeV
- Author
-
F. Matathias, Kensuke Homma, S. Chernichenko, H. Lim, B. Bassalleck, M. Konno, Tadaaki Isobe, J. S. Chai, P. L. McGaughey, Y. Nakamiya, D. Lynch, G. Baksay, B. Forestier, M. T. Bjorndal, B. Sahlmueller, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, C. Vale, B. S. Chang, J. Klay, P. Rosnet, O. Dietzsch, S. Afanasiev, A. Ster, K. O. Eyser, K. Fujiwara, H. Valle, J. Newby, G. Roche, Julia Velkovska, J. Chiba, T. Ichihara, D. Hornback, V. S. Pantuev, A. Taranenko, H. W. Van Hecke, G. C. Mishra, Takao Sakaguchi, Kazushi Miki, M. Harvey, J. L. Drachenberg, C. Klein-Boesing, Osamu Jinnouchi, Takahiro Fusayasu, I. D. Ojha, J. G. Boissevain, Masashi Kaneta, Alexander Malakhov, H. Pei, A. D. Frawley, D. Silvermyr, Y. Fukao, A. Shevel, K. Hasuko, D. Kawall, L. S. Zolin, W. J. Park, K. Okada, S. P. Sorensen, M. Gonin, C. Pinkenburg, S. Huang, S. H. Aronson, V. I. Kochetkov, M. Rosati, Tamás Csörgő, Dylan Walker, T. Hester, H. En'yo, P. D. Barnes, A. Yanovich, B. Love, Joakim Nystrand, P. Constantin, M. J. Leitch, Eva Haslum, B. Lenzi, M. Stepanov, W. Holzmann, Marie Germain, J. Murata, Bruno Espagnon, A. A. Vinogradov, Henrik Tydesjö, Maya Hachiya Shimomura, A. G. Litvinenko, J. Gosset, S. N. White, Jiangyong Jia, Y. Goto, J. P. Sullivan, Y. I. Makdisi, Gerd Joachim Kunde, I. Shein, G. S. Kyle, J. M. Burward-Hoy, Alexei Khanzadeev, A. Kozlov, R. Seto, V-N. Tram, K. Nakano, E. Stenlund, K. Haruna, James Alexander, H. Sakata, Charles Maguire, W. C. Smith, S. Leckey, W. E. Sondheim, C. L. Woody, M. J. Tannenbaum, Motoi Inaba, R. Averbeck, Byung-Sik Hong, S. Yokkaichi, J. M. Heuser, V. Dzhordzhadze, Robert F. Hobbs, X. He, Alberto Baldisseri, A. Deshpande, C. P. Singh, A. Bazilevsky, K. Das, K. Boyle, P. A. Rukoyatkin, Mate Csanad, M. K. Lee, I. Tserruya, Y. J. Mao, O. O. Omiwade, S. Y. Fung, Josh Moss, D. Mukhopadhyay, Yu. Efremenko, S. Kametani, V. Peresedov, Robert Vertesi, Y. Le Bornec, B. M. Johnson, E. P. Hartouni, S. Rembeczki, J. G. Lajoie, V. Singh, Alexandre Lebedev, Kiyoshi Tanida, J. H. Kang, D. Bucher, D. M. Lee, Steven E. Skutnik, J. S. Haggerty, A. Romana, T. Hachiya, A. Kiss, A. Isupov, Y. Watanabe, E. Kistenev, John Hill, Anne Marie Sickles, David D'Enterria, I. V. Sourikova, S. Butsyk, H. A. Torii, Toru Sugitate, T. L. Thomas, L. D. Isenhower, Y. L. Yamaguchi, S. Gadrat, H. Masui, A. K. Dubey, J. Sziklai, A. A. Bickley, Minghui Liu, T. V. Moukhanova, Vladimir Samsonov, B. Komkov, I. Younus, Ryugo S. Hayano, S. Takagi, I. Otterlund, S. Bathe, Norio Saito, T. Todoroki, H. Harada, Z. Yasin, Hirohiko Sato, S. K. Tuli, Henner Buesching, M. A. L. Leite, Y. Riabov, Brian Cole, M. Heffner, K. N. Barish, R. P. Pisani, Kenneth Francis Read, Kenta Shigaki, A. Soldatov, Debashish Pal, M. Nguyen, G. R. Young, H. Qu, François Fleuret, R. S. Towell, M. B. Deaton, A. S. Nyanin, Christophe Pierre Suire, Alexander Milov, I. Garishvili, Akio Kiyomichi, S. Sawada, Y. S. Lai, S. Batsouli, Rachid Nouicer, Nikolay Tyurin, I. J. Choi, A. Kravitz, I. Nakagawa, A. V. Kazantsev, M. Naglis, Hideki Hamagaki, K. Aoki, G. David, N. Kurihara, Frank Ellinghaus, Y. Tanaka, V. Babintsev, C. L. Silva, B. Azmoun, J. Ying, E. R. Kinney, K. S. Sim, D. P. Morrison, T. K. Shea, S. Campbell, A. Král, M. J. Kweon, L. Tomášek, A. Franz, M. N. Wagner, Marcus Hohlmann, J. L. Nagle, M. L. Brooks, V. E. Semenov, Junji Tojo, Y. Kwon, P. Mikeš, M. Reuter, H. Iinuma, M. C. McCain, J. Zimányi, Masayasu Ishihara, Tatsuya Chujo, Torsten Dahms, K. Dehmelt, M. G. Hur, C. Y. Chi, H. Hiejima, Jen-Chieh Peng, Susumu Sato, F. Staley, L. Baksay, E. J. Desmond, N. Grau, A. P.T. Palounek, M. Oka, Xiao-yan Li, K. Shoji, K. Imai, Marisilvia Donadelli, V. Bumazhnov, T. C. Awes, Kyoichiro Ozawa, T. Liška, A. Dion, M. Togawa, Jun Kikuchi, Saskia Mioduszewski, Jan Rak, P. W. Stankus, J. Park, R. Lacey, K. Kurita, A. Enokizono, H. Pereira, Florian Bauer, W. A. Zajc, S. Kelly, R. Granier de Cassagnac, A. Adare, V. Baublis, S. Belikov, K. S. Joo, N. Kamihara, A. Rakotozafindrabe, N. N. Ajitanand, A. Denisov, V. Cianciolo, J. Jin, E. M. Takagui, Sergey Fokin, Y. Tsuchimoto, J. E. Frantz, Laurent Bernard Aphecetche, Herve Borel, A. Glenn, A. Taketani, V. L. Rykov, O. Zaudtke, M. Virius, Takahiro Nakamura, R. Armendariz, T. Horaguchi, C. R. Cleven, C. Haegemann, Y. Inoue, Rushan Han, M. N. Hagiwara, S. Esumi, D. Sharma, Y. Cobigo, I. Ravinovich, Susumu Oda, I. E. Yushmanov, Tae-Yeon Lee, Martin Purschke, C. A. Aidala, F. Gastineau, Y. Nagata, P. J. Kroon, T. Shohjoh, A. Durum, A. Drees, Dong-Hun Kim, H. A. Gustafsson, S. S. Ryu, Eun-Hee Kim, Catherine Micaela Silvestre, Agneta Oskarsson, D. Kotchetkov, D. S. Brown, C. Zhang, R. Bennett, A. Morreale, Ahmed Al-Jamel, J. Kubart, M. Finger, Z. Fraenkel, Y. Berdnikov, Viktor Riabov, M. Ouchida, Y. Akiba, R. Pak, S. F. Pate, M. Mishra, S. Nagamiya, J. Asai, Kazuhiro Tanaka, O. Drapier, J. Egdemir, H. Al-Bataineh, D. E. Fields, B. V. Jacak, M. McCumber, A. K. Purwar, Jason Kamin, Vaclav Vrba, Klaus Johannes Reygers, S. P. Stoll, V. Papavassiliou, Shingo Sakai, M. Mitrovski, M. Wysocki, S. S.E. Rosendahl, G. Bunce, A. Churyn, D. Jouan, Johannes Peter Wessels, C. A. Ogilvie, T. K. Hemmick, Yasuo Miake, L. Kochenda, M. Issah, T. Kawagishi, Hiroaki Ohnishi, M. D. Malik, E. Vznuzdaev, N. Willis, A. Hadj Henni, Wei Xie, Xingguo Li, R. A. Soltz, M. Grosse Perdekamp, D. Winter, M. P. Comets, D. Yu Peressounko, P. Tarján, T. Tabaru, Senta Greene, B. E. Norman, E. O'Brien, Xiong Wang, Dong Jo Kim, M. Chiu, T. A. Shibata, D. Isenhower, A. Toia, L. Mašek, J. L. Charvet, T. E. Miller, E. T. Atomssa, P. Chung, M. Holmes, W. S. Emam, H. Kanou, Taku Gunji, H. Gong, J. Seele, F. Kajihara, H. Delagrange, S. Zhou, and Y. S. Kim
- Subjects
Quark ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Angular momentum ,Quantitative Biology::Neurons and Cognition ,Hadron ,Kinetic energy ,Particle identification ,Nuclear physics ,High Energy Physics::Experiment ,Impact parameter ,Nuclear Experiment ,Anisotropy ,Energy (signal processing) - Abstract
We have studied the dependence of azimuthal anisotropy $v_2$ for inclusive and identified charged hadrons in Au$+$Au and Cu$+$Cu collisions on collision energy, species, and centrality. The values of $v_2$ as a function of transverse momentum $p_T$ and centrality in Au$+$Au collisions at $\sqrt{s_{_{NN}}}$=200~GeV and 62.4~GeV are the same within uncertainties. However, in Cu$+$Cu collisions we observe a decrease in $v_2$ values as the collision energy is reduced from 200 to 62.4~GeV. The decrease is larger in the more peripheral collisions. By examining both Au$+$Au and Cu$+$Cu collisions we find that $v_2$ depends both on eccentricity and the number of participants, $N_{\rm part}$. We observe that $v_2$ divided by eccentricity ($\varepsilon$) monotonically increases with $N_{\rm part}$ and scales as ${N_{\rm part}^{1/3}}$. The Cu$+$Cu data at 62.4 GeV falls below the other scaled $v_{2}$ data. For identified hadrons, $v_2$ divided by the number of constituent quarks $n_q$ is independent of hadron species as a function of transverse kinetic energy $KE_T=m_T-m$ between $0.1
- Published
- 2015
24. Centrality dependence of low-momentum direct-photon production inAu+Aucollisions atsNN=200 GeV
- Author
-
A. G. Litvinenko, D. Kawall, K. N. Barish, S. Sano, A. Kozlov, R. Seto, M. L. Brooks, A. Deshpande, I. Danchev, X. He, Y. Aramaki, V. Peresedov, Robert Vertesi, J. Koster, Y. Fukao, H. Masui, A. A. Bickley, A. Veicht, M. Tomášek, T. Murakami, Maya Hachiya Shimomura, S. Dairaku, J. T. Mitchell, G. S. Kyle, M. Kurosawa, L. Guo, Alexei Khanzadeev, R. S. Hollis, Shinichi Masumoto, Jen-Chieh Peng, A. Sen, V. S. Pantuev, M. Sano, Y. I. Makdisi, R. A. Soltz, H. A. Gustafsson, T. Hester, M. Gonin, M. Grosse Perdekamp, S. Afanasiev, N. A. Sparks, K. S. Sim, Vladimir Samsonov, M. E. Connors, James Alexander, S. Baumgart, T. Todoroki, B. Lewis, C. Zhang, Tomoya Tsuji, M. Mendoza, S. N. White, A. Sukhanov, Y. Ikeda, S. Sawada, Masamichi Ishihara, R. Seidl, Vladislav Manko, M. Slunečka, A. Enokizono, D. Reynolds, K. Kurita, H. Pereira, Beomkyu Kim, O. Dietzsch, E. Stenlund, R. Averbeck, Byung-Sik Hong, Y. Tanaka, Hongfang Liu, P. Chung, Wei Xie, Minghui Liu, Y. Morino, R. Yang, P. Ružička, J. B. Choi, S. Belikov, E. Mannel, M. Virius, E. T. Atomssa, H. Valle, Dipak Kumar Mishra, A. Bazilevsky, D. E. Fields, K. Watanabe, J. Imrek, R. Akimoto, Dipanwita Dutta, Zvi Hirsh Citron, Inkyu Park, S. Taneja, M. J. Tannenbaum, M. Javani, B. V. Jacak, Peter Christiansen, A. Datta, C. O. Kim, K. Shoji, M. Heffner, C. Gal, H. Torii, K. Nakano, Xiong Wang, Tomofumi Nagae, Kenneth Francis Read, Julia Velkovska, K. B. Kim, R. Pak, H. Asano, J. L. Nagle, I. J. Choi, D. Winter, T. Ichihara, W. E. Sondheim, D. Ivanischev, J. Jin, K. Imai, P. Castera, P. W. Stankus, M. McCumber, C. H. Chen, M. Stepanov, E. Tennant, M. Rosati, Alexandre Lebedev, C. Pinkenburg, Viktor Riabov, C. Vale, D. Yu Peressounko, N. Grau, E. M. Takagui, Dong Jo Kim, Tamás Csörgő, N. Riveli, T. V. Moukhanova, P. Tarján, M. Leitgab, R. S. Towell, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, A. Manion, K. Boyle, P. A. Rukoyatkin, K. Okada, K. Karatsu, A. Garishvili, T. Sato, H. J. Moon, L. Baksay, Alice Mignerey, L. D'Orazio, S. Miyasaka, G. Roche, C. Silvestre, I. Ravinovich, I. Garishvili, F. Wei, Y. Hori, Anne Marie Sickles, Tadaaki Isobe, J. Hanks, A. Yu. Semenov, Y. Nakamiya, D. Lynch, Y. Tsuchimoto, K. Gainey, D. M. Lee, A. A. Vinogradov, Kyeongpil Lee, Marisilvia Donadelli, V. Bumazhnov, B. Meredith, Charles Maguire, Sung Keun Park, Takao Sakaguchi, G. Baksay, Motoi Inaba, X. Bing, O. Chvala, J. S. Bok, P. L. McGaughey, D. Kotchetkov, N. N. Ajitanand, H. En'yo, M. Bai, A. Dion, M. I. Nagy, A. D. Frawley, Jiangyong Jia, Y. Goto, S. Choi, J. Ide, R. M. Wright, Seong H. Kim, John Hill, M. J. Leitch, S. Huang, E. C. Aschenauer, J. P. Wood, M. Sarsour, Mate Csanad, A. Iordanova, R. Tanabe, Johannes Peter Wessels, B. Sahlmueller, J. G. Lajoie, Takahiro Nakamura, G. R. Young, W. Holzmann, Alexander Milov, Hiromi Iinuma, C. Y. Chi, Y. J. Kim, Toru Sugitate, T. Hachiya, J. E. Frantz, D. McGlinchey, D. Kleinjan, K. V. Dharmawardane, S. Whitaker, K. Kiriluk, I. Nakagawa, H. Qu, Senta Greene, R. Luechtenborg, Young-Ki Kim, T. Engelmore, N. Novitzky, S. Yokkaichi, Kiyoshi Tanida, M. Nihashi, F. Matathias, A. Kravitz, Y. Onuki, Susumu Oda, O. Drapier, C. Baumann, S. Kametani, A. T. Basye, Kensuke Homma, E. Richardson, K. B. Lee, Y. J. Mao, A. Durum, M. S. Daugherity, B. Komkov, Rushan Han, C. P. Singh, D. Watanabe, Frank Ellinghaus, Dmitry Blau, Y. Miyachi, Jan Rak, Zhiying You, Hideki Hamagaki, K. Aoki, C. Nattrass, M. Vargyas, Martin Purschke, C. A. Aidala, P. Constantin, B. M. Johnson, M. D. Malik, R. Lacey, B. Fadem, E. Vznuzdaev, E. R. Kinney, Y. Watanabe, François Fleuret, R. P. Pisani, D. P. Morrison, E. Kistenev, Filip Krizek, R. Bennett, M. Kawashima, J. H. Kang, Atsushi Takahara, J. S. Haggerty, S. R. Lee, R. Granier de Cassagnac, A. Adare, E. O'Brien, D. Hornback, G. David, K. I. Hahn, L. Ding, K. A. Drees, A. Ster, R. J. Petti, A. Isupov, B. Bassalleck, M. Konno, S. Campbell, B. H. Kang, Y. J. Kwon, D. Isenhower, E. J. Desmond, D. Roach, K. M. Kijima, Norio Saito, Tsutomu Mibe, S. Bathe, H. Al-Ta'Ani, M. Finger, Tatsuya Chujo, I. Tserruya, J. Klatsky, S. Wolin, J. Sziklai, A. Toia, Agneta Oskarsson, Yu. Efremenko, J. Ying, A. Franz, M. Togawa, Takahiro Fusayasu, I. Younus, Jongmin Lee, J. Newby, Brian Cole, V. Singh, N. Kamihara, M. A. L. Leite, E. Vazquez-Zambrano, A. Nederlof, Y. Berdnikov, S. H. Lee, Y. Akiba, Y. S. Lai, M. Ouchida, Alexander Malakhov, N. Means, C. McKinney, M. Mishra, J. Park, S. Nagamiya, K. Das, E. P. Hartouni, Byoungchoo Park, J. S. Kang, S. H. Lim, Vaclav Vrba, Klaus Johannes Reygers, J. Sun, Rui Wei, D. Silvermyr, M. Naglis, M. Kasai, H. Pei, A. Drees, A. Taketani, A. Glenn, L. S. Zolin, T. L. Thomas, R. Belmont, C. M. Camacho, W. J. Park, J. S. Kapustinsky, A. Kiss, Eunja Kim, Christopher Rosen, Prashant Shukla, T. Kempel, Dong-Hun Kim, V. Babintsev, Aaron Angerami, S. Kaneti, I. E. Yushmanov, Eun-Hee Kim, Ryugo S. Hayano, Henner Buesching, Steve Edwards, A. Yanovich, Y. Riabov, Kenta Shigaki, M. Chiu, S. F. Pate, X. Jiang, M. Nguyen, Taku Gunji, H. Gong, J. Seele, C. A. Ogilvie, M. Soumya, X. Gong, Ke. Nakamura, A. S. Nyanin, T. K. Hemmick, Marcus Hohlmann, J. M. Durham, Yasuo Miake, Rachid Nouicer, A. N. Zelenski, M. Proissl, F. Kajihara, W. A. Zajc, Torsten Dahms, H. Themann, L. Kochenda, M. Issah, L. A. Linden Levy, H. J. Kim, C. L. Woody, A. Berdnikov, J. Murata, H. Al-Bataineh, P. Rosnet, V. Baublis, A. Taranenko, K. O. Eyser, A. K. Purwar, K. Fujiwara, Gerd Joachim Kunde, I. Shein, A. Denisov, Yuki Watanabe, K. Sakashita, D. Kotov, Y. L. Yamaguchi, A. V. Kazantsev, K. Sedgwick, V. Cianciolo, Y. Komatsu, Kazushi Miki, Mihael Makek, D. S. Jumper, E. Leitner, S. Butsyk, J. Hamblen, T. Horaguchi, Jason Kamin, I. V. Sourikova, Brajesh K. Singh, Sergey Fokin, S. P. Stoll, L. Tomášek, P. Mikeš, Soren Pontoppidan Sorensen, S. Motschwiller, H. W. Van Hecke, A. Morreale, S. S.E. Rosendahl, Z. Fraenkel, R. K. Choudhury, K. S. Joo, A. Rakotozafindrabe, N. Apadula, A. Vossen, S. Esumi, D. Sharma, R. Ichimiya, G. Bunce, S. Zhou, S. Tarafdar, D. Ivanishchev, B. Azmoun, L. Patel, A. Král, D. Jouan, V. Papavassiliou, T. C. Awes, Kyoichiro Ozawa, T. Liška, Eva Haslum, B. Lenzi, M. Oka, P. Kline, K. S. Lee, P. Liebing, S. D. Rolnick, Bum-Hoon Lee, M. Wysocki, B. Bannier, K. Yamaura, K. Hashimoto, Xingguo Li, and B. Love
- Subjects
Physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,Exponential distribution ,Photon ,010308 nuclear & particles physics ,Inverse ,01 natural sciences ,Momentum ,Nuclear physics ,Yield (chemistry) ,0103 physical sciences ,High Energy Physics::Experiment ,Atomic physics ,Nuclear Experiment ,010306 general physics ,Centrality ,Scaling - Abstract
The PHENIX experiment at RHIC has measured the centrality dependence of the direct photon yield from Au+Au collisions at sNN−−−√=200 GeV down to pT=0.4 GeV/c. Photons are detected via photon conversions to e+e− pairs and an improved technique is applied that minimizes the systematic uncertainties that usually limit direct photon measurements, in particular at low pT. We find an excess of direct photons above the Ncoll-scaled yield measured in p+p collisions. This excess yield is well described by an exponential distribution with an inverse slope of about 240MeV/c in the pT range 0.6–2.0 GeV/c. While the shape of the pT distribution is independent of centrality within the experimental uncertainties, the yield increases rapidly with increasing centrality, scaling approximately with Nαpart, where α=1.38±0.03(stat)±0.07(syst).
- Published
- 2015
25. Search for dark photons from neutral meson decays inp+pandd+Aucollisions atsNN=200 GeV
- Author
-
S. Dairaku, P. Rosnet, K. O. Eyser, A. K. Purwar, K. Fujiwara, O. Zaudtke, K. Watanabe, Takafumi Niida, J. Huang, K. Shoji, Marisilvia Donadelli, V. Bumazhnov, D. Black, M. Virius, E. T. Atomssa, J. S. Yoo, Ajit Kumar Mohanty, M. K. Dayananda, T. A. Shibata, C. L. Silva, Min Soo Kim, V. S. Pantuev, P. W. Stankus, Prakhar Garg, T. Sato, B. Bannier, S. Mizuno, Tadaaki Isobe, A. Sen, R. Tanabe, D. Layton, J. D. Orjuela Koop, C. H. Chen, H. Pei, S. Campbell, P. L. McGaughey, A. Manion, N. S. Bandara, S. Afanasiev, Charles Maguire, I. Tserruya, M. Jezghani, Yu. Efremenko, Kiyoshi Tanida, C. Nattrass, E. Kistenev, Y. Imazu, M. Chiu, P. Lichtenwalner, S. Beckman, J. Sun, M. Ouchida, H. W. Van Hecke, Y. Miyachi, A. Ster, N. Feege, G. Roche, D. Watanabe, M. D. Malik, E. Vznuzdaev, Y. J. Mao, W. C. Chang, D. Isenhower, A. Toia, T. Moon, L. Mašek, H. J. Kim, V. Singh, T. Murakami, Yi Gu, S. Hasegawa, K. S. Sim, K. Okada, Maya Hachiya Shimomura, R. S. Hollis, Y. I. Makdisi, N. Means, K. Kurita, J. Asai, M. Naglis, L. Ding, M. Kofarago, J. S. Haggerty, S. R. Lee, Rushan Han, Y. Tanaka, E. Mannel, Nagahiro Saito, B. Meredith, I. Ravinovich, H. J. Moon, L. Baksay, T. Koblesky, K. R. Andrews, R. A. Soltz, H. Borel, Y. Miake, H. Qu, A. Kiss, V. Dzhordzhadze, A. Hadj Henni, J. Bryslawskyj, C. Baumann, S. Kametani, S. Sawada, J. Ying, A. Franz, Henner Buesching, Steve Edwards, R. Yang, Masamichi Ishihara, Beomkyu Kim, Minghui Liu, M. Heffner, Wei Xie, Kenneth Francis Read, T. Ichihara, C. Harper, Shingo Sakai, D. J. Kim, H. Nakagomi, T. Hoshino, D. Roach, K. M. Kijima, Y. Fukao, B. Komkov, K. Utsunomiya, Hideki Hamagaki, K. Aoki, M. Bai, E. C. Aschenauer, M. Grosse Perdekamp, F. Giordano, M. E. Connors, M. S. Daugherity, C. P. Singh, H. En'yo, M. J. Leitch, A. Glenn, S. Taneja, X. Gong, Marcus Hohlmann, A. V. Kazantsev, G. David, Sung Keun Park, K. I. Hahn, K. Hashimoto, Tae-Yeon Lee, M. J. Tannenbaum, Vladimir Samsonov, I. J. Choi, B. Xia, S. K. Park, K. N. Barish, C. M. Camacho, R. S. Towell, B. M. Johnson, Prashant Shukla, Xingguo Li, J. L. Charvet, Dennis Perepelitsa, S. F. Pate, K. Imai, Tsutomu Mibe, L. Tomášek, T. Todoroki, Eunja Kim, L. A. Linden Levy, P. Mikeš, M. Towell, Atsushi Takahara, Soren Pontoppidan Sorensen, M. A. L. Leite, C. L. Woody, J. H. Do, Anders Nils Erik Oskarsson, A. Kim, A. Taranenko, Ke. Nakamura, A. Berdnikov, R. J. Petti, O. Drapier, A. Isupov, Inseok Yoon, Kazushi Miki, Zhiying You, R. Bennett, M. Kawashima, D. Sharma, B. K. Schmoll, H. Al-Bataineh, R. Armendariz, J. A. Key, K. Karatsu, L. Patel, K. A. Drees, Youngil Kwon, H. H. Shim, S. Bathe, Terry C Awes, L. Aphecetche, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, D. Mukhopadhyay, E. Tennant, S. Rembeczki, P. Montuenga, Martin Purschke, N. N. Ajitanand, M. Vargyas, A. Caringi, H. Ozaki, Y. S. Lai, Young-Ki Kim, T. Hester, David Olle Rickard Silvermyr, J. Sziklai, S. H. Lim, S. J. Jeon, T. Horaguchi, Brajesh K. Singh, J. Ben-Benjamin, M. Finger, S. Motschwiller, Kyoichiro Ozawa, T. Liška, Yorito Yamaguchi, T. Engelmore, N. Novitzky, F. Staley, A. Dion, M. I. Nagy, Y. Berdnikov, Frank Ellinghaus, S. H. Lee, Y. Akiba, O. Chvala, H. Themann, Ju Hwan Kang, T. Jones, Petr Gallus, Jun Kikuchi, A. Yu. Semenov, J. L. Nagle, D. John, P. Castera, J. Gosset, Peter Christiansen, S. Sano, G. D. N. Perera, R. Belmont, Brian Cole, J. S. Kapustinsky, Y. Hori, Anne Marie Sickles, E. Joo, D. Ivanishchev, T. Sodre, Jongmin Lee, Seong H. Kim, V. Papavassiliou, Takahiro Nakamura, Johannes Peter Wessels, B. Schaefer, J. Klatsky, P. Chung, J. Imrek, T. Kempel, E. R. Kinney, Alice Mignerey, L. D'Orazio, D. P. Morrison, C. A. Ogilvie, V. Babintsev, D. Winter, S. Kaneti, T. K. Hemmick, S. Miyasaka, C. McKinney, J. M. Durham, M. Mishra, S. Nagamiya, J. Murata, I. V. Sourikova, D. McGlinchey, D. Yu Peressounko, P. Tarján, Vaclav Vrba, Klaus Johannes Reygers, I. Garishvili, F. Wei, X. Jiang, Hari Guragain, J. G. Lajoie, Pawan Kumar Netrakanti, J. S. Bok, D. Broxmeyer, A. Enokizono, Susumu Sato, B. H. Kang, V. E. Semenov, M. Alfred, T. Hachiya, S. Whitaker, Susumu Oda, Gerd Joachim Kunde, T. L. Thomas, Takao Sakaguchi, S. Tarafdar, H. Asano, Jennifer E. Perry, K. Das, I. Shein, E. P. Hartouni, C. Klein-Boesing, H. Al-Ta'Ani, Tatsuya Chujo, A. Kravitz, Jen-Chieh Peng, Rui Wei, A. Durum, Ryugo S. Hayano, A. Morreale, K. DeBlasio, L. Kochenda, M. Issah, Y. Riabov, T. Sumita, C. Y. Chi, Taku Gunji, H. Gong, J. Seele, Z. Fraenkel, G. R. Young, K. Sedgwick, M. Patel, F. Kajihara, A. D. Frawley, V. L. Rykov, T. Dahms, J. G. Rubin, Catherine Micaela Silvestre, Mihael Makek, D. Reynolds, A. Deshpande, Kenta Shigaki, S. Yokkaichi, V-N. Tram, N. Grau, K. Yamaura, M. Nguyen, A. Meles, R. Pinson, M. Leitgab, V. Khachatryan, M. Kurosawa, Hiroyuki Sako, Eva Haslum, B. Lenzi, A. J. Miller, S. Butsyk, S. Huang, A. Sukhanov, Inkyu Park, R. K. Choudhury, E. Stenlund, B. Azmoun, Senta Greene, Rachid Nouicer, A. N. Zelenski, M. Proissl, Motoi Inaba, Y. Onuki, S. W. Nam, M. Tomášek, G. S. Kyle, S. Zhou, W. Holzmann, H. Pereira, Xiong Wang, Z. Conesa del Valle, A. Král, M. J. Kweon, Y. Morino, Hongfang Liu, Y. Ikeda, Y. Watanabe, A. T. Basye, J. G. Boissevain, D. E. Fields, R. M. Wright, S. Wolin, M. Sarsour, Mate Csanad, A. Iordanova, James Alexander, J. S. Kang, Jan Rak, M. Savastio, A. Baldisseri, R. Averbeck, R. Lacey, S. D. Rolnick, B. V. Jacak, C. O. Kim, I. Younus, R. Akimoto, B. Fadem, E. O'Brien, S. Y. Han, R. Granier de Cassagnac, Byung-Sik Hong, A. Bazilevsky, M. Oka, N. Kamihara, J. Jin, A. Adare, M. Gonin, C. Pinkenburg, M. McCumber, R. Pak, A. Soldatov, M. Wysocki, P. Kline, K. S. Lee, E. M. Takagui, M. Nihashi, K. Dehmelt, Alexandre Lebedev, D. M. Lee, N. Riveli, X. He, M. Stepanov, K. B. Lee, Atsushi Taketani, P. Liebing, M. Beaumier, Byoungchoo Park, K. S. Joo, A. Rakotozafindrabe, N. Apadula, C. Oakley, A. Drees, David D'Enterria, A. Datta, J. Hanks, K. Kiriluk, R. P. Pisani, A. Vossen, R. Ichimiya, K. Sakashita, D. Kotov, D. S. Jumper, Y. Aramaki, J. Hamblen, Jason Kamin, V. Peresedov, S. P. Stoll, Robert Vertesi, S. S.E. Rosendahl, G. Bunce, A. Churyn, D. Jouan, J. Koster, S. Batsouli, H. Masui, A. K. Dubey, A. A. Bickley, A. Veicht, A. Mwai, B. Love, A. G. Litvinenko, A. Sexton, D. Kawall, A. Kozlov, R. Seto, K. Haruna, I. Danchev, O. Dietzsch, H. Valle, Dipanwita Dutta, C. Gal, Julia Velkovska, M. Rosati, Tamás Csörgő, A. A. Vinogradov, Jiangyong Jia, Y. Goto, D. Kleinjan, Eric Appelt, Takahiro Fusayasu, Alexander Malakhov, K. Kihara, ShinIchi Esumi, L. S. Zolin, W. J. Park, Christopher Rosen, P. D. Barnes, A. Yanovich, D. Hornback, John Hill, H. A. Torii, Toru Sugitate, François Fleuret, Z. Rowan, M. Mendoza, M. L. Brooks, S. N. White, Deepa Thomas, Zvi Hirsh Citron, H. Ge, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, L. Guo, Alexei Khanzadeev, S. Belikov, J. B. Choi, C. Vale, Dipak Kumar Mishra, D. H. Kim, B. S. Chang, A. Timilsina, Christine Angela Aidala, J. Klay, Alexander Nyanin, Y. Nakamiya, D. Lynch, G. Baksay, J. H. Bhom, T. V. Moukhanova, B. Sahlmueller, Y. J. Kim, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, S. Chernichenko, B. Bassalleck, M. Konno, Jason Newby, J. E. Frantz, Dmitry Blau, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, J. Park, M. Kasai, Y. Tsuchimoto, Y. Iwanaga, I. E. Yushmanov, Eun-Hee Kim, H. A. Gustafsson, C. Zhang, P. Ružička, Viktor Riabov, Gary Grim, K. V. Dharmawardane, H. Iinuma, A. P.T. Palounek, Serpil Yalcin, Aaron Angerami, W. A. Zajc, L. Xue, V. Baublis, A. Denisov, Yuki Watanabe, V. Cianciolo, Y. Tomita, Sergey Fokin, and P. Sett
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Gauge boson ,Muon ,Anomalous magnetic dipole moment ,Meson ,010308 nuclear & particles physics ,Dalitz plot ,01 natural sciences ,7. Clean energy ,Dark photon ,Standard Model ,Nuclear physics ,0103 physical sciences ,010306 general physics ,Relativistic Heavy Ion Collider - Abstract
The standard model (SM) of particle physics is spectacularly successful, yet the measured value of the muon anomalous magnetic moment (g−2)μ deviates from SM calculations by 3.6σ. Several theoretical models attribute this to the existence of a “dark photon,” an additional U(1) gauge boson, which is weakly coupled to ordinary photons. The PHENIX experiment at the Relativistic Heavy Ion Collider has searched for a dark photon, U, in π0,η→γe+e− decays and obtained upper limits of O(2×10−6) on U−γ mixing at 90% C.L. for the mass range 30
- Published
- 2015
26. Measurement ofΥ(1S+2S+3S)production inp+pand Au + Au collisions atsNN=200GeV
- Author
-
V. S. Pantuev, M. Sano, H. Pei, Sung Keun Park, K. Okada, N. N. Ajitanand, H. J. Kim, H. En'yo, M. J. Leitch, L. Aphecetche, Takahiro Nakamura, A. Dion, S. Baumgart, Masamichi Ishihara, Johannes Peter Wessels, M. Sarsour, Mate Csanad, A. Iordanova, D. McGlinchey, M. I. Nagy, Takafumi Niida, D. Watanabe, Bum-Hoon Lee, Minghui Liu, A. Durum, Marisilvia Donadelli, V. Bumazhnov, J. L. Charvet, M. D. Malik, E. Vznuzdaev, M. Heffner, A. Yu. Semenov, Catherine Micaela Silvestre, A. Sukhanov, K. Kurita, H. Pereira, R. A. Soltz, H. Borel, K. V. Dharmawardane, B. Azmoun, A. Král, M. J. Kweon, K. Yamaura, Kenneth Francis Read, T. Ichihara, A. Hadj Henni, J. Gosset, K. Watanabe, M. Grosse Perdekamp, H. Liu, R. Tanabe, D. Layton, Y. Hori, Beomkyu Kim, C. O. Kim, M. Wysocki, K. Shoji, B. Bannier, Wei Xie, X. Jiang, M. E. Connors, K. A. Drees, A. Enokizono, R. Pak, K. B. Lee, P. Chung, Y. Miyachi, M. Oka, W. C. Chang, I. J. Choi, D. E. Fields, B. V. Jacak, J. Imrek, P. Kline, K. S. Lee, Maya Hachiya Shimomura, R. S. Hollis, H. Iinuma, P. W. Stankus, K. Sakashita, M. Nihashi, L. Ding, Rushan Han, Peter Christiansen, J. S. Kang, J. Klatsky, A. Datta, H. Asano, D. Roach, M. McCumber, Dmitry Blau, K. M. Kijima, T. Murakami, A. P.T. Palounek, H. Gong, J. Seele, D. Winter, D. Yu Peressounko, P. Liebing, Vladimir Samsonov, Christine Nattrass, N. Riveli, T. Todoroki, K. S. Joo, K. Hashimoto, P. L. McGaughey, J. Hanks, Charles Maguire, P. Tarján, Xingguo Li, S. Choi, Aaron Angerami, K. Das, E. P. Hartouni, David D'Enterria, S. Butsyk, K. O. Eyser, S. P. Sorensen, N. Apadula, M. Chiu, W. A. Zajc, O. Dietzsch, D. Kotov, A. K. Purwar, Kiyoshi Tanida, K. Fujiwara, X. Bing, O. Chvala, Tamas Ferenc Csorgo, H. Qu, H. Valle, Seong H. Kim, V. Baublis, S. Sawada, A. Denisov, V. Cianciolo, E. Kistenev, Y. Tomita, Tomofumi Nagae, J. L. Nagle, Dipanwita Dutta, P. Castera, S. Yokkaichi, J. Ying, A. Franz, S. Zhou, A. Baldisseri, S. D. Rolnick, Y. I. Makdisi, A. Vossen, R. P. Pisani, S. Esumi, A. V. Kazantsev, K. Aoki, M. Vargyas, Y. L. Yamaguchi, C. Gal, E. J. Desmond, G. David, Sergey Fokin, Julia Velkovska, K. I. Hahn, F. Kajihara, D. Sharma, Senta Greene, A. T. Basye, R. Ichimiya, D. S. Jumper, Tae-Yeon Lee, B. Komkov, Martin Purschke, Ajit Kumar Mohanty, C. A. Aidala, F. Fleuret, Norio Saito, Tsutomu Mibe, B. Fadem, E. O'Brien, C. M. Camacho, Prashant Shukla, M. Rosati, K. Ozawa, T. A. Shibata, C. L. Silva, T. Sato, S. F. Pate, A. Morreale, Z. Fraenkel, M. A. L. Leite, L. Tomášek, Ke. Nakamura, H. Al-Bataineh, Jason Kamin, M. Togawa, E. Vazquez-Zambrano, A. A. Vinogradov, R. K. Choudhury, Y. J. Mao, J. Sun, D. Isenhower, A. Toia, S. H. Lim, J. H. Kang, T. Kempel, S. Motschwiller, Dong-Hun Kim, D. Ivanishchev, H. A. Gustafsson, S. Kaneti, L. Mašek, R. Belmont, V. Papavassiliou, J. S. Kapustinsky, Jiangyong Jia, S. P. Stoll, Y. Fukao, V. Babintsev, S. Edwards, A. Nederlof, J. Park, Y. Goto, M. Tomášek, C. Zhang, G. S. Kyle, T. Hester, J. S. Haggerty, S. R. Lee, P. Ružička, James Alexander, R. Averbeck, Byung-Sik Hong, D. Kleinjan, Y. Komatsu, A. Bazilevsky, Philippe Rosnet, Viktor Riabov, L. Patel, Alexandre Lebedev, T. C. Awes, T. Liška, D. M. Lee, A. Rakotozafindrabe, K. Kiriluk, V-N. Tram, N. Grau, Y. S. Lai, H. W. Van Hecke, M. Kasai, S. S.E. Rosendahl, Jun Kikuchi, G. Bunce, Y. Ikeda, M. Leitgab, J. G. Boissevain, M. J. Tannenbaum, M. Gonin, Motoi Inaba, Y. Tanaka, E. Mannel, C. Pinkenburg, H. Torii, G. Roche, A. Churyn, D. Jouan, S. Bathe, M. Javani, Y. Aramaki, Agneta Oskarsson, I. E. Yushmanov, Eun-Hee Kim, Y. Berdnikov, L. Guo, Alexei Khanzadeev, S. H. Lee, Y. Akiba, E. Stenlund, S. Wolin, C. McKinney, M. Mishra, S. Nagamiya, S. X. Oda, N. Kamihara, Vaclav Vrba, Klaus Johannes Reygers, D. Mukhopadhyay, E. Tennant, S. Rembeczki, Rui Wei, J. B. Choi, Dipak Kumar Mishra, H. J. Moon, A. Kiss, L. Baksay, A. Deshpande, Byoungchoo Park, Henner Buesching, M. Kurosawa, A. Drees, Alice Mignerey, T. V. Moukhanova, Y. S. Watanabe, L. D'Orazio, S. Miyasaka, F. Matathias, R. Vértesi, X. Gong, Kensuke Homma, E. Richardson, B. Lewis, Marcus Hohlmann, P. Constantin, S. Chernichenko, B. Bassalleck, Jongmin Lee, M. Konno, Takao Sakaguchi, L. A. Linden Levy, R. Akimoto, P. Mikeš, C. A. Ogilvie, S. Masumoto, J. T. Mitchell, J. E. Frantz, R. Seidl, T. K. Hemmick, Vladislav Manko, J. M. Durham, C. Klein-Boesing, Yasuo Miake, J. Jin, A. Taketani, M. Slunečka, Y. Watanabe, E. M. Takagui, A. D. Frawley, T. Gunji, L. Kochenda, M. Issah, C. Baumann, S. Kametani, A. Takahara, V. L. Rykov, T. Dahms, M. S. Daugherity, C. P. Singh, S. Belikov, S. Huang, T. Isobe, B. M. Johnson, S. Dairaku, Filip Krizek, W. Holzmann, C. L. Woody, A. Berdnikov, O. Zaudtke, R. J. Petti, X. He, V. Peresedov, A. Isupov, C. Suire, I. Younus, J. Koster, C. Vale, S. Batsouli, J. Sziklai, H. Masui, M. Virius, E. T. Atomssa, A. K. Dubey, B. S. Chang, A. A. Bickley, A. Veicht, K. N. Barish, Brian Cole, R. S. Towell, J. Klay, C. H. Chen, A. Manion, I. Ravinovich, Y. Nakamiya, D. Lynch, I. Garishvili, M. Bai, G. Baksay, E. C. Aschenauer, F. Wei, Zhiying You, R. Bennett, A. Soldatov, R. Hayano, M. Finger, A. Garishvili, M. L. Brooks, B. Sahlmueller, B. Love, I. V. Sourikova, Y. J. Kim, T. L. Thomas, I. Tserruya, Yu. Efremenko, V. Singh, H. Hamagaki, C. Y. Chi, A. Glenn, A. G. Litvinenko, Eunja Kim, Takahiro Fusayasu, Alexander Milov, I. Nakagawa, Young-Ki Kim, T. Engelmore, N. Novitzky, Alexander Malakhov, M. Naglis, Frank Ellinghaus, D. Silvermyr, K. Karatsu, E. R. Kinney, D. P. Morrison, L. S. Zolin, S. Campbell, B. H. Kang, W. J. Park, A. Kozlov, Y. Riabov, V. E. Semenov, Anne Marie Sickles, P. D. Barnes, A. Yanovich, R. Seto, K. Haruna, H. Al-Ta'Ani, Tatsuya Chujo, Kenta Shigaki, Jen-Chieh Peng, M. Nguyen, M. Soumya, K. Gainey, D. Reynolds, Inkyu Park, Xiong Wang, B. Meredith, Dong Jo Kim, John Hill, J. S. Bok, D. Kotchetkov, A. S. Nyanin, Toru Sugitate, Y. Morino, Rachid Nouicer, A. N. Zelenski, M. Proissl, F. Staley, G. R. Young, D. Kawall, H. Themann, M. Mendoza, S. N. White, T. Tsuji, Zvi Hirsh Citron, Y. Onuki, K. Nakano, J. Murata, K. B. Kim, W. E. Sondheim, D. Ivanischev, Jan Rak, Gerd Joachim Kunde, K. Boyle, P. A. Rukoyatkin, I. Shein, R. Lacey, J. G. Lajoie, T. Hachiya, S. Whitaker, S. Afanasiev, A. Ster, A. Kravitz, R. Granier de Cassagnac, K. Sedgwick, J. Newby, M. Ouchida, Mihael Makek, A. Adare, N. Means, J. Asai, D. Hornback, Shingo Sakai, A. Taranenko, Kazushi Miki, T. Horaguchi, Brajesh K. Singh, K. S. Sim, V. Dzhordzhadze, M. Stepanov, Y. Kwon, R. Yang, S. Tarafdar, S. Taneja, Y. Tsuchimoto, K. Imai, Eva Haslum, B. Lenzi, O. Drapier, and A. Sen
- Subjects
Scattering cross-section ,Physics ,Nuclear and High Energy Physics ,Large Hadron Collider ,010308 nuclear & particles physics ,Modification factor ,01 natural sciences ,Luminosity ,Nuclear physics ,Yield (chemistry) ,0103 physical sciences ,High Energy Physics::Experiment ,Atomic physics ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider - Abstract
Measurements of bottomonium production in heavy-ion and p + p collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The inclusive yield of the three states, (1S + 2S + 3S), was measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au + Au and p + p collisions at root sNN = 200 GeV. The (1S + 2S + 3S) -> e(+)e(-) differential cross section at midrapidity was found to be B(ee)d sigma/dy = 108 +/- 38 (stat) +/- 15 (syst) +/- 11 (luminosity) pb in p + p collisions. The nuclear modification factor in the 30% most central Au + Au collisions indicates a suppression of the total. state yield relative to the extrapolation from p + p collision data. The suppression is consistent with measurements made by STAR at RHIC and at higher energies by the CMS experiment at the Large Hadron Collider.
- Published
- 2015
27. Cross section forbb¯production via dielectrons ind+ Au collisions atsNN=200GeV
- Author
-
S. Bathe, Agneta Oskarsson, S. Sawada, J. Ying, Y. Akiba, Jen-Chieh Peng, A. Franz, S. Nagamiya, Inkyu Park, Vaclav Vrba, Xiong Wang, Klaus Johannes Reygers, Z. Conesa del Valle, Dong Jo Kim, Y. Tanaka, Rui Wei, E. Mannel, A. Veicht, K. Sakashita, F. Matathias, Kensuke Homma, Vladimir Samsonov, I. Ravinovich, H. J. Moon, L. Baksay, E. Richardson, Y. Fukao, B. Love, V. S. Pantuev, T. Hester, M. K. Dayananda, M. Bai, R. S. Towell, Zhiying You, R. Bennett, M. Kawashima, B. Bassalleck, M. Konno, Y. Onuki, M. Wysocki, I. Garishvili, F. Wei, M. Finger, S. Dairaku, I. Tserruya, Alice Mignerey, M. Virius, Manabu Togawa, A. Datta, Yu. Efremenko, G. S. Kyle, L. D'Orazio, Jongmin Lee, C. H. Chen, N. Grau, Prashant Shukla, S. F. Pate, J. Hamblen, Jason Kamin, V. Singh, K. Okada, A. Kiss, Charles Maguire, H. En'yo, A. Taketani, Jan Rak, J. T. Mitchell, Alexei Khanzadeev, D. S. Jumper, James Alexander, T. Dahms, Ke. Nakamura, O. Drapier, H. Al-Bataineh, Ajit Kumar Mohanty, M. J. Leitch, Henner Buesching, J. L. Nagle, R. Lacey, R. Seidl, Vladislav Manko, E. Stenlund, Motoi Inaba, S. P. Stoll, T. A. Shibata, C. L. Silva, T. Sato, R. Averbeck, Byung-Sik Hong, R. M. Wright, Steve Edwards, C. Y. Chi, Takao Sakaguchi, M. Slunečka, R. Granier de Cassagnac, A. Bazilevsky, A. Adare, A. Glenn, E. Kistenev, V. Papavassiliou, Eunja Kim, Martin Purschke, C. A. Aidala, S. S.E. Rosendahl, S. Belikov, J. B. Choi, A. Deshpande, Mate Csanad, A. D. Frawley, P. Lichtenwalner, D. Kawall, Alexander Milov, I. Nakagawa, T. Engelmore, G. Bunce, J. Newby, G. Roche, Marcus Hohlmann, K. A. Drees, D. Isenhower, Frank Ellinghaus, Alexandre Lebedev, M. Kurosawa, D. M. Lee, M. Nihashi, E. R. Kinney, D. P. Morrison, C. Silvestre, S. Campbell, C. Vale, R. Seto, S. Huang, Y. J. Kwon, L. A. Linden Levy, A. Toia, O. Dietzsch, T. Kempel, D. Jouan, H. Pei, J. H. Bhom, H. Valle, Tatsuya Chujo, Marisilvia Donadelli, V. Bumazhnov, Y. Watanabe, A. Taranenko, W. Holzmann, Y. Nakamiya, D. Lynch, K. Fujiwara, Dipanwita Dutta, R. P. Pisani, T. V. Moukhanova, I. Younus, Kazushi Miki, Brajesh K. Singh, K. S. Sim, M. Chiu, I. Danchev, Dmitry Blau, G. Baksay, Maya Hachiya Shimomura, X. Jiang, Y. L. Yamaguchi, A. Morreale, C. A. Ogilvie, R. Tanabe, Julia Velkovska, A. Sukhanov, E. J. Desmond, K. Das, Y. I. Makdisi, K. Kurita, T. K. Hemmick, J. M. Durham, H. Qu, S. Tarafdar, R. Yang, Yasuo Miake, M. Rosati, H. Pereira, B. Sahlmueller, M. Naglis, E. Vazquez-Zambrano, Z. Fraenkel, Tamás Csörgő, K. N. Barish, E. T. Atomssa, Y. J. Kim, S. Taneja, Hideki Hamagaki, K. Aoki, T. Ichihara, Eva Haslum, G. David, K. I. Hahn, A. Enokizono, L. Kochenda, M. Issah, P. Chung, M. J. Tannenbaum, H. W. Van Hecke, Masayasu Ishihara, R. K. Choudhury, Y. Morino, H. Torii, M. Kasai, J. Jin, Rushan Han, K. Imai, E. M. Takagui, S. W. Nam, C. Baumann, K. Watanabe, S. Sano, A. Kim, H. Themann, Jiangyong Jia, Y. Goto, B. Komkov, K. Shoji, K. Karatsu, Y. Tsuchimoto, S. Rembeczki, Y. Iwanaga, K. S. Joo, Takahiro Fusayasu, J. Murata, Anne Marie Sickles, T. Horaguchi, P. W. Stankus, Taku Gunji, H. Gong, J. Seele, Gerd Joachim Kunde, C. P. Singh, Norio Saito, Tsutomu Mibe, I. Shein, M. A. L. Leite, D. Kleinjan, F. Kajihara, M. L. Brooks, N. Apadula, C. Oakley, A. Drees, B. M. Johnson, X. He, K. Sedgwick, I. E. Yushmanov, R. Pak, S. Butsyk, Y. Aramaki, G. R. Young, Robert Vertesi, S. Zhou, R. Belmont, J. S. Kapustinsky, S. Esumi, V. Babintsev, D. Sharma, J. Koster, R. Ichimiya, S. D. Rolnick, D. Silvermyr, R. J. Petti, B. Azmoun, A. Král, H. Masui, M. Oka, K. S. Lee, D. Watanabe, P. Liebing, W. J. Park, Christopher Rosen, J. Sziklai, Brian Cole, A. Yanovich, O. Chvala, Minghui Liu, M. D. Malik, J. G. Lajoie, E. Vznuzdaev, S. N. White, I. J. Choi, A. Kravitz, Deepa Thomas, D. Hornback, K. B. Lee, Zvi Hirsh Citron, K. Nakano, D. Roach, K. M. Kijima, W. E. Sondheim, D. Ivanischev, K. Boyle, J. E. Frantz, Xingguo Li, B. Meredith, John Hill, M. Heffner, Toru Sugitate, Kenneth Francis Read, François Fleuret, C. L. Woody, A. Caringi, A. Dion, M. I. Nagy, P. L. McGaughey, Johannes Peter Wessels, I. V. Sourikova, Beomkyu Kim, A. V. Kazantsev, M. Ouchida, L. Tomášek, R. A. Soltz, N. Means, M. Grosse Perdekamp, Soren Pontoppidan Sorensen, M. E. Connors, Y. Ikeda, K. Tanida, T. Jones, Peter Christiansen, T. C. Awes, Kyoichiro Ozawa, T. Liška, T. L. Thomas, D. Winter, M. Gonin, C. Pinkenburg, J. S. Bok, Jun Kikuchi, D. Yu Peressounko, Ryugo S. Hayano, Y. Riabov, Kenta Shigaki, M. Nguyen, A. S. Nyanin, Rachid Nouicer, M. Proissl, Gary Grim, K. V. Dharmawardane, Senta Greene, A. T. Basye, B. Fadem, S. Yokkaichi, E. O'Brien, Aaron Angerami, Y. J. Mao, W. A. Zajc, J. H. Kang, J. S. Haggerty, V. Baublis, A. Denisov, V. Cianciolo, Sergey Fokin, Y. S. Lai, H. A. Gustafsson, P. Ružička, Viktor Riabov, Hongfang Liu, D. E. Fields, B. V. Jacak, M. McCumber, J. Hanks, Sung Keun Park, N. N. Ajitanand, Takahiro Nakamura, D. McGlinchey, Susumu Oda, A. Durum, K. Yamaura, and T. Murakami
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Particle physics ,Cross section (physics) ,Deuterium ,Section (archaeology) ,Yield (chemistry) ,High Energy Physics::Phenomenology ,High Energy Physics::Experiment ,Charm (quantum number) ,Nuclear Experiment ,Relativistic Heavy Ion Collider - Abstract
We report a measurement of e+e− pairs from semileptonic heavy-flavor decays in d+Au collisions at sNN−−−√=200 GeV. By exploring the mass and transverse-momentum dependence of the yield, the bottom decay contribution can be isolated from charm, and quantified by comparison to pythia and mc@nlo simulations. The resulting bb¯-production cross section is σdAubb¯=1.37±0.28(stat)±0.46(syst) mb, which is equivalent to a nucleon-nucleon cross section of σNNbb=3.4±0.8(stat)±1.1(syst)μb.
- Published
- 2015
28. Three-Dimensional Imaging Analysis of Two-Particle Correlations in Heavy-Ion Reactions
- Author
-
M. Heffner, Pawel Danielewicz, Duncan A. Brown, and R. A. Soltz
- Subjects
Source function ,Physics ,Nuclear and High Energy Physics ,Classical mechanics ,Three dimensional imaging ,Hadron ,General Physics and Astronomy ,Spherical harmonics ,Particle ,Source imaging ,Integral equation ,Computational physics ,Image (mathematics) - Abstract
We report an extension of the source imaging method for imag- ing full three-dimensional sources from three-dimensional like-pair correlations. Our technique consists of expanding the correlation data and the underlying source function in spherical harmonics and inverting the resulting system of one-dimensional integral equations. With this method of attack, we can image the source function quickly, even with the extremely large data sets common in three-dimensional analyses. We apply our method to the recently measured E859 un-Coulomb corrected data.
- Published
- 2005
29. The effects of a hydrogen environment on the lifetime of small-diameter drift chamber anode wires
- Author
-
L. Rosenberg, J. King, J. Castelaz, Adam Bernstein, T. Smith, S. Thomson, Z. Burstein, J. Kunkle, and M. Heffner
- Subjects
Physics ,Nuclear and High Energy Physics ,Hydrogen ,Detector ,chemistry.chemical_element ,Sense (electronics) ,Tungsten ,Anode ,Nuclear physics ,chemistry ,Neutron detection ,Composite material ,Platinum ,Instrumentation ,Embrittlement - Abstract
Possible deterioration of anode sense wires used in a hydrogen-filled neutron detector is investigated. Wires were loaded with free weights and put into a wire detector environment. Stainless Steel, Tungsten, and Platinum wires did not break after exposure to charge equivalent to many wire lifetimes. Furthermore, exposure to hydrogen gas caused no noticeable surface degradation or change in wire yield strength.
- Published
- 2005
30. The forward time projection chamber in STAR
- Author
-
K.H. Ackermann, F. Bieser, F.P. Brady, D. Cebra, J.E. Draper, V. Eckardt, T. Eggert, H. Fessler, K.J. Foley, V. Ghazikhanian, T.J. Hallman, M. Heffner, H. Hümmler, J. Klay, S.R. Klein, A. Lebedev, M.J. LeVine, T. Ljubicic, G. Lo Curto, R.S. Longacre, M. Oldenburg, HG. Ritter, J.L. Romero, N. Schmitz, A. Schüttauf, J. Seyboth, P. Seyboth, M. Vidal, C. Whitten, and E. Yamamoto
- Subjects
Physics ,Nuclear and High Energy Physics ,Time projection chamber ,Phase space ,Detector ,Resolution (electron density) ,Star (graph theory) ,Diffusion (business) ,Nuclear Experiment ,Space (mathematics) ,Instrumentation ,Track density ,Computational physics - Abstract
Two cylindrical forward TPC detectors are described which were constructed to extend the phase space coverage of the STAR experiment to the region 2.5 < |�| < 4.0. For optimal use of the available space and in order to cope with the high track density of central Au+Au collisions at RHIC, a novel design was developed using radial drift in a low diffusion gas. From prototype measurements a 2-track resolution of 1 - 2 mm is expected.
- Published
- 2003
31. Strangeness in Au$plus$Au collisions at $\surd$sNN $equal$ 130 GeV observed with the STAR detector
- Author
-
Y. Fisyak, A. Ogawa, Ian Johnson, Christophe Pierre Suire, A. H. Tang, P. Seyboth, Guy Paic, A. Chikanian, S. S. Shimanskii, A. Ridiger, K. Schweda, G. Eppley, A. Stolpovsky, H. Hümmler, Marie Germain, T. S. McShane, M. Šumbera, J. Pluta, V. Ghazikhanian, R. S. Longacre, Michael A. Thompson, L. Kotchenda, C. Struck, A. A.P. Suaide, S. Heppelmann, D. Flierl, A. I. Pavlinov, B. E. Bonner, J. L. Romero, O. D. Tsai, L. Lakehal-Ayat, G. Van Buren, J. Takahashi, J. W. Watson, L. Martin, F. Liu, M. B. Tonjes, A. N. Zubarev, G. Igo, A. Boucham, R. E. Tribble, Gerald W Hoffmann, S. Lee Barnby, M. Castro, Torre Wenaus, R. K. Kutuev, V. Morozov, M. Messer, V. Grigoriev, Q. Li, J. Grabski, K. Krueger, V. S. Shvetcov, Q. J. Liu, C. A. Whitten, Thomas A. Trainor, J. Berger, J. E. Draper, V. Faine, R. L. Ray, J. Castillo, E. Potrebenikova, J. M. Nelson, D. Hardtke, P. Fachini, A. M. van der Molen, S. Bekele, W. Peryt, R. D. Majka, R. V. Cadman, S. W. Wissink, E. Finch, Frank Jm Geurts, B. Choi, B. D. Anderson, J. N. Marx, A. P. Meschanin, C. E. Allgower, V. V. Belaga, J. Fu, B. K. Srivastava, I. M. Vasilevski, Alexander Kovalenko, J. Sowinski, J. Schambach, T. Ljubicic, H. Caines, W. S. Deng, J. P. Coffin, O. V. Rogachevski, V. Perevoztchikov, K. Filimonov, L. V. Nogach, V. L. Rykov, M. Cherney, A. Ishihara, V. B. Dunin, W. Christie, J. Gans, P. Sorensen, S. Lange, E. Sugarbaker, Thomas Michael Cormier, V. Trofimov, Peter Graham Jones, A. I. Kulikov, S. J. Lindenbaum, Yu Chen, H. Z. Huang, Boris Hippolyte, Masashi Kaneta, R. Wells, Morton Kaplan, W. M. Zhang, Andrey Vasiliev, J. Balewski, J. G. Cramer, P. Nevski, Sergey Panitkin, J. C. Dunlop, Claude Andre Pruneau, Sergey Voloshin, L. Didenko, F. Meissner, D. Seliverstov, A. Schüttauf, Jinghui Yang, T. Ullrich, G. lo Curto, Janet Elizabeth Seger, R. Zoulkarneev, K. J. Foley, L. C. Bland, Peter Martin Jacobs, Subhasis Chattopadhyay, Zubayer Ahammed, M. Kramer, K. Turner, M. Guedon, M. J. LeVine, S. Radomski, S. R. Klein, Y. Panebratsev, T. J. Humanic, C. Roy, S. U. Pandey, A. E. Yakutin, O. Barannikova, D. L. Olson, I.A. Savin, N. T. Porile, J. W. Harris, R. P. Scharenberg, G. Rai, M. A. C. Lamont, S. B. Nurushev, Z. Milosevich, Mingshui Chen, F. Retiere, A. Klyachko, A. A. Derevschikov, A. Lebedev, S. Margetis, N. Schmitz, H. S. Matis, A. C. Saulys, F. Laue, Yu A. Matulenko, M. Horsley, E. Gushin, G. J. Kunde, Vladimir Tikhomirov, N. G. Minaev, Vladimir Petrov, E. Shahaliev, P. Yepes, V. Eckardt, O. A. Grachov, A. Szanto de Toledo, B. Stringfellow, Z. J. Xu, S. P. Chernenko, L. S. Schroeder, E. G. Judd, Adam Ryszard Kisiel, N. Xu, W. J. Llope, S. Trentalange, J. Baudot, S. V. Razin, E. Hjort, L. Gaudichet, H. J. Crawford, A. Cardenas, J. Kiryluk, N.D. Gagunashvili, Y. V. Zanevski, T. Pawlak, G. D. Westfall, J. Carroll, W. W. Jacobs, Jay Roberts, Malgorzata Anna Janik, J. Porter, B. Lasiuk, C. L. Kunz, M. Lopez-Noriega, H. Long, C. F. Moore, C. P. Lansdell, R.J.M. Snellings, R. Witt, R. Willson, A. Tai, D. G. Underwood, J. Amonett, G. Skoro, M. Heffner, J. Klay, M. Oldenburg, V. Emelianov, D. Keane, D. Reichhold, R. Lednický, Nikolai Smirnov, R. Stock, J. Mitchell, L. G. Efimov, T. J. Hallman, T. J. M. Symons, Yu. Ivanshin, V. A. Nikitin, H. Ward, A. S. Hirsch, M. de la Calderón Barca Sánchez, A. A. Kuznetsov, L. Liu, P. Kravtsov, V. M. Leontiev, Olivier Ravel, C. Adler, K. E. Shestermanov, H. G. Ritter, R. Bellwied, Jeffrey G. Reid, A. S. Konstantinov, B. Erazmus, D. Cebra, Yu Melnick, V. A. Moiseenko, Marcelo Gameiro Munhoz, D. J. Prindle, A. V. Brandin, H. Zhang, E. J. Stephenson, M. A. Lisa, H. M. Spinka, J. H. Thomas, H. Bichsel, S. E. Vigdor, G. Odyniec, G. S. Averichev, Christian Claude Kuhn, Matthew J. Anderson, David Lynn, Lee Stuart Barnby, C. O. Blyth, A. M. Poskanzer, W. A. Love, B. Norman, I. Sakrejda, Vitaly Okorokov, M. Tokarev, H. H. Wieman, J. Engelage, John N. Wood, J. M. Landgraf, M. M. de Moura, M. Strikhanov, M. L. Miller, Christina Markert, J. Sandweiss, Z. Liu, P. Szarwas, E. Yamamoto, C. A. Gagliardi, T. Herston, Fuqiang Wang, V. I. Yurevich, and I. Zborovský
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,High Energy Physics::Phenomenology ,Nuclear Theory ,Hadron ,Strangeness production ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Strangeness ,Spectral line ,Nuclear physics ,Baryon ,Transverse plane ,Pion ,High Energy Physics::Experiment ,Nuclear Experiment ,STAR detector - Abstract
The STAR detector has made a variety of measurements of strange and other hadronic species in Au+Au collisions at s N N = 130 GeV. A comparison of kaon and pion production enables an examination of the systematics of strangeness production with energy by comparing them to lower energy collisions. Anti-baryon to baryon ratios indicate a much reduced net-baryon density and transverse momentum spectra show that a picture of transverse expansion seems appropriate.
- Published
- 2002
32. Neutral strange particle dynamics in Au $plus$ Au collisions at AGS energies
- Author
-
P Chung for the E895 Collaboration, J M Alexander, N N Ajitanand, M Anderson, D Best, F P Brady, T Case, W Caskey, D Cebra, J L Chance, P Chung, B Cole, K Crowe, A C Das, J E Draper, M L Gilkes, S Gushue, M Heffner, A S Hirsch, E L Hjort, L Huo, M Justice, M Kaplan, D Keane, J C Kintner, J Klay, D Krofcheck, Roy A Lacey, J Lauret, M A Lisa, H Liu, Y M Liu, R McGrath, Z Milosevich, G Odyniec, D L Olson, S Panitkin, C Pinkenburg, N T Porile, G Rai, H G Ritter, J L Romero, R Scharenberg, L Schroeder, B Srivastava, N T B Stone, T J M Symons, J Whitfield, T Wienold, R Witt, L Wood, and W N Zhang
- Subjects
Physics ,Nuclear and High Energy Physics ,Strange quark ,Space time ,Gaussian ,Dynamics (mechanics) ,Magnitude (mathematics) ,Scattering length ,Radius ,Nuclear physics ,symbols.namesake ,Pion ,symbols ,High Energy Physics::Experiment ,Atomic physics ,Nuclear Experiment - Abstract
The E895 Collaboration has investigated a number of mixed-particle correlations involving neutral strange particles (K0s and Λ) in 2, 4, 6 and 8 A GeV Au + Au collisions at the AGS. The first measurements for pΛ correlations indicate a correlation magnitude of about 50% with a 26 MeV width. Detailed comparisons between data and theory suggest an emitting source with an effective Gaussian radius close to 4.5 fm. This radius is much larger than the value of 2.8 fm predicted by the relativistic transport code ART. Pairs of pK0, π−Λ and π−K0 are found to display essentially zero correlation at 6 A GeV. The latter observations are not unexpected considering that the proton–K0 interaction has a very small scattering length and there are no very well known interactions between pions and Λs or K0s.
- Published
- 2002
33. Measurement ofKS0andK*0inp+p,d+Au, and Cu + Cu collisions atsNN=200 GeV
- Author
-
P. Sett, Jen-Chieh Peng, J. G. Rubin, Martin Purschke, C. A. Aidala, C. Baumann, Y. Ikeda, D. Reynolds, S. Dairaku, M. Mitrovski, Takafumi Niida, Inkyu Park, J. G. Boissevain, M. S. Daugherity, C. P. Singh, Xiong Wang, C. Silvestre, Serpil Yalcin, D. Kotchetkov, Pawan Kumar Netrakanti, Z. Conesa del Valle, M. K. Dayananda, Masashi Kaneta, B. M. Johnson, O. Zaudtke, Dong Jo Kim, A. Morreale, Prakhar Garg, Z. Fraenkel, B. Bannier, V. Khachatryan, R. Akimoto, M. Virius, E. T. Atomssa, R. J. Petti, A. Isupov, C. Suire, Aaron Angerami, R. A. Soltz, R. K. Choudhury, C. Pinkenburg, Marisilvia Donadelli, S. Campbell, J. D. Orjuela Koop, G. S. Kyle, A. Veicht, K. Dehmelt, C. H. Chen, J. Sziklai, G. Roche, James Alexander, C. L. Woody, A. Berdnikov, V. Bumazhnov, M. P. Comets, D. Black, Y. J. Mao, S. Kametani, W. A. Zajc, L. Xue, V. Baublis, A. Denisov, Yuki Watanabe, M. Wysocki, M. Vargyas, A. Manion, Brian Cole, J. H. Kang, T. L. Thomas, Sung Keun Park, M. Grosse Perdekamp, F. Giordano, M. E. Connors, V. Cianciolo, B. Meredith, B. Azmoun, Ryugo S. Hayano, Y. Riabov, J. S. Haggerty, A. Caringi, A. Romana, A. Král, Kenta Shigaki, M. J. Kweon, I. Ravinovich, R. Averbeck, Byung-Sik Hong, M. Nguyen, A. S. Nyanin, Rachid Nouicer, Min Soo Kim, A. N. Zelenski, R. Tanabe, M. Proissl, V. S. Pantuev, Sergey Fokin, Petr Gallus, Y. Nagata, M. Gonin, N. N. Ajitanand, A. Bazilevsky, Atsushi Takahara, A. J. Miller, T. Horaguchi, Philippe Rosnet, Y. S. Lai, M. Rosati, R. S. Towell, Prashant Shukla, S. F. Pate, T. Ichihara, Osamu Jinnouchi, Matthew G. Reuter, Takahiro Fusayasu, M. Oka, P. Kline, K. S. Lee, Alexander Milov, I. Nakagawa, Young-Ki Kim, T. Engelmore, N. Novitzky, G. D. N. Perera, Takahiro Nakamura, A. Sukhanov, K. Kurita, H. Pereira, Y. Morino, Gary Grim, K. V. Dharmawardane, K. A. Drees, J. L. Charvet, Alexandre Lebedev, D. M. Lee, Maya Hachiya Shimomura, R. S. Hollis, Y. I. Makdisi, P. Liebing, I. V. Sourikova, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. McGlinchey, Susumu Oda, C. O. Kim, M. Bai, I. Garishvili, Akio Kiyomichi, F. Wei, J. Gosset, H. Iinuma, A. P.T. Palounek, A. A. Vinogradov, Ke. Nakamura, M. Beaumier, K. S. Joo, D. P. Morrison, H. Al-Bataineh, J. A. Key, S. P. Sorensen, S. K. Park, Dylan Walker, A. Durum, J. Klatsky, O. Chvala, X. He, O. O. Omiwade, J. Hamblen, T. E. Miller, Alexander Malakhov, K. Kihara, V. E. Semenov, J. Zimányi, Tatsuya Chujo, Y. Onuki, K. Yamaura, S. Yokkaichi, J. G. Lajoie, H. A. Gustafsson, A. Hadj Henni, M. Alfred, T. Hachiya, M. Ouchida, N. Means, J. Asai, S. Whitaker, Shingo Sakai, Inseok Yoon, Zhiying You, R. Bennett, M. Kawashima, N. Kurihara, J. Bryslawskyj, Jennifer E. Perry, Jiangyong Jia, Y. Goto, D. Kleinjan, D. Ivanishchev, T. Jones, I. Tserruya, Peter Christiansen, D. Winter, S. Afanasiev, A. Ster, N. Feege, Y. Aramaki, V. Peresedov, Jan Rak, R. Lacey, C. Zhang, M. Jezghani, Yu. Efremenko, S. Esumi, P. Ružička, R. Granier de Cassagnac, D. Silvermyr, J. Koster, R. Ichimiya, A. Kravitz, A. Adare, A. Enokizono, M. Finger, Hiroaki Ohnishi, Jongmin Lee, D. Yu Peressounko, Viktor Riabov, V. Papavassiliou, Sébastien Gadrat, J. Newby, Beomkyu Kim, Wei Xie, T. Sumita, A. V. Kazantsev, C. Y. Chi, T. Murakami, K. Okada, K. Das, Hongfang Liu, D. E. Fields, S. Batsouli, H. Masui, A. K. Dubey, V. Singh, Y. Fukao, A. Shevel, Rushan Han, B. Komkov, E. P. Hartouni, Herve Borel, D. Lynch, M. J. Tannenbaum, O. Dietzsch, L. S. Zolin, Robert F. Hobbs, W. J. Park, P. Tarján, H. En'yo, M. J. Leitch, B. V. Jacak, P. Chung, A. A. Bickley, A. Mwai, B. Love, L. Ding, Y. Nakamiya, A. Taketani, H. Valle, M. Kofarago, I. J. Choi, B. Xia, Dipanwita Dutta, Christopher Rosen, M. Kurosawa, T. Koblesky, D. Hornback, N. S. Bandara, S. Butsyk, K. S. Sim, V. Dzhordzhadze, Saskia Mioduszewski, P. D. Barnes, A. Yanovich, M. Naglis, Dennis Perepelitsa, D. Roach, K. M. Kijima, M. McCumber, T. Tabaru, C. Gal, V. L. Rykov, T. Dahms, A. G. Litvinenko, Junji Tojo, Y. Kwon, Vladimir Samsonov, Julia Velkovska, T. Hester, H. Torii, B. K. Schmoll, Debashish Pal, S. Sawada, M. Towell, J. Ying, A. Franz, Tsutomu Mibe, H. Nakagomi, T. Hoshino, Y. Gu, M. A. L. Leite, R. Yang, H. Hiejima, A. Taranenko, Senta Greene, Christine Nattrass, T. Todoroki, N. Riveli, A. Sexton, Xingguo Li, S. Taneja, L. Tomášek, A. T. Basye, B. E. Norman, Susumu Sato, W. S. Emam, A. Datta, Kazushi Miki, S. J. Jeon, B. Fadem, E. O'Brien, P. Mikeš, H. Asano, K. B. Lee, J. Hanks, Tamas Ferenc Csorgo, A. Kozlov, R. Seto, K. Haruna, K. Imai, D. Sharma, M. I. Nagy, D. Watanabe, A. Kim, D. Mukhopadhyay, Brajesh K. Singh, S. Rembeczki, J. Jin, K. Karatsu, E. M. Takagui, S. H. Lim, J. L. Nagle, I. Danchev, S. Takagi, K. N. Barish, A. Glenn, Anne Marie Sickles, B. Schaefer, E. Joo, M. D. Malik, E. Vznuzdaev, Eunja Kim, Masayasu Ishihara, M. Stepanov, L. Patel, John Hill, M. K. Lee, J. S. Bok, T. C. Awes, Ajit Kumar Mohanty, Hari Guragain, G. Baksay, S. Sano, R. Belmont, J. S. Kapustinsky, L. Aphecetche, H. Ozaki, T. A. Shibata, C. L. Silva, J. S. Kang, Toru Sugitate, G. R. Young, S. Tarafdar, J. H. Do, M. L. Brooks, T. Sato, Kyoichiro Ozawa, T. Liška, A. Dion, Jun Kikuchi, L. D. Isenhower, V. Babintsev, Tadaaki Isobe, Johannes Peter Wessels, Eva Haslum, B. Lenzi, J. Chiba, Alice Mignerey, L. D'Orazio, S. Miyasaka, François Fleuret, X. Jiang, P. L. McGaughey, Z. Rowan, M. Mendoza, S. N. White, M. Chiu, Deepa Thomas, A. Meles, V-N. Tram, S. Beckman, Hiroyuki Sako, N. Grau, S. W. Nam, D. Kawall, Takao Sakaguchi, A. Sen, M. Leitgab, D. Isenhower, Minghui Liu, C. Klein-Boesing, A. D. Frawley, M. Heffner, Kenneth Francis Read, H. Themann, Motoi Inaba, V. I. Kochetkov, R. M. Wright, A. Toia, T. Moon, M. Sarsour, Mate Csanad, A. Iordanova, S. Y. Han, L. Mašek, S. Huang, J. Murata, S. H. Aronson, Gerd Joachim Kunde, M. Nihashi, I. Shein, W. Holzmann, David D'Enterria, H. Kanou, Taku Gunji, H. Gong, J. Seele, K. Sedgwick, R. P. Pisani, M. Patel, F. Kajihara, Alberto Baldisseri, Mihael Makek, A. Deshpande, B. Sahlmueller, H. Delagrange, M. N. Wagner, S. Zhou, Y. J. Kim, Y. Watanabe, J. T. Mitchell, S. D. Rolnick, I. Younus, R. Seidl, Vladislav Manko, A. Soldatov, M. Slunečka, S. Hasegawa, A. Kiss, S. Belikov, Z. Yasin, Henner Buesching, Steve Edwards, Marcus Hohlmann, C. Vale, L. A. Linden Levy, B. S. Chang, A. Timilsina, J. Klay, K. O. Eyser, A. K. Purwar, K. Fujiwara, Y. L. Yamaguchi, F. Matathias, Kensuke Homma, E. Richardson, S. Mizuno, P. Constantin, S. Chernichenko, B. Bassalleck, M. Konno, H. W. Van Hecke, S. Bathe, Agneta Oskarsson, Y. Berdnikov, S. Wolin, R. Pak, S. H. Lee, Y. Akiba, C. McKinney, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, N. Kamihara, Rui Wei, R. Armendariz, N. Apadula, C. Oakley, A. Drees, Y. Imazu, J. Kubart, Steven E. Skutnik, H. Qu, Hideki Hamagaki, K. Aoki, G. David, K. I. Hahn, K. Watanabe, C. A. Ogilvie, K. Shoji, M. Tomášek, T. K. Hemmick, P. W. Stankus, J. M. Durham, Yasuo Miake, P. Montuenga, C. R. Cleven, K. DeBlasio, L. Kochenda, M. Issah, C. Haegemann, Y. Inoue, T. Kempel, R. Pinson, K. Sakashita, D. Kotov, J. Egdemir, D. S. Jumper, Charles Maguire, Jason Kamin, S. P. Stoll, Kiyoshi Tanida, E. Kistenev, P. Lichtenwalner, H. Harada, J. Sun, H. Pei, S. S.E. Rosendahl, G. Bunce, H. J. Kim, A. Churyn, M. B. Deaton, D. Jouan, Y. Tanaka, E. Mannel, Nagahiro Saito, H. J. Moon, F. Staley, L. Baksay, R. Vértesi, J. E. Frantz, Dmitry Blau, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, J. Park, A. Rakotozafindrabe, M. Kasai, Y. Tsuchimoto, Y. Iwanaga, I. E. Yushmanov, Eun-Hee Kim, Alexei Khanzadeev, E. Stenlund, J. B. Choi, H. Sakata, Dipak Kumar Mishra, D. H. Kim, J. H. Bhom, T. V. Moukhanova, Zvi Hirsh Citron, H. Ge, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, and Tae-Yeon Lee
- Subjects
Physics ,Quark ,Nuclear and High Energy Physics ,Meson ,Nuclear Theory ,Strangeness ,Phi meson ,Baryon ,Nuclear physics ,Deuterium ,High Energy Physics::Experiment ,Impact parameter ,Nuclear Experiment ,Relativistic Heavy Ion Collider - Abstract
The PHENIX experiment at the Relativistic Heavy Ion Collider has performed a systematic study of K-S(0) and K*(0) meson production at midrapidity in p + p, d + Au, and Cu + Cu collisions at root s(NN) = 200 GeV. The K-S(0) and K*(0) mesons are reconstructed via their K-S(0) -> pi(0)(-> gamma gamma) pi(0)(-> gamma gamma) and K*(0) -> K-+/-pi(-/+) decay modes, respectively. The measured transverse-momentum spectra are used to determine the nuclear modification factor of K-S(0) and K*(0) mesons in d + Au and Cu + Cu collisions at different centralities. In the d + Au collisions, the nuclear modification factor of K-S(0) and K*(0) mesons is almost constant as a function of transverse momentum and is consistent with unity, showing that cold-nuclear-matter effects do not play a significant role in the measured kinematic range. In Cu + Cu collisions, within the uncertainties no nuclear modification is registered in peripheral collisions. In central collisions, both mesons show suppression relative to the expectations from the p + p yield scaled by the number of binary nucleon-nucleon collisions in the Cu + Cu system. In the p(T) range 2-5 GeV/c, the strange mesons (K-S(0), K*(0)) similarly to the phi meson with hidden strangeness, showan intermediate suppression between the more suppressed light quark mesons (pi(0)) and the nonsuppressed baryons (p, (p) over bar). At higher transverse momentum, p(T) > 5 GeV/c, production of all particles is similarly suppressed by a factor of approximate to 2.
- Published
- 2014
34. Cross section and transverse single-spin asymmetry ofηmesons inp↑+pcollisions ats=200 GeVat forward rapidity
- Author
-
M. Patel, E. Joo, M. Stepanov, F. Kajihara, C. L. Woody, A. Berdnikov, Hari Guragain, H. Pei, M. Vargyas, Alexei Khanzadeev, S. Tarafdar, E. Stenlund, S. Butsyk, J. B. Choi, A. Caringi, R. S. Towell, M. I. Nagy, H. J. Kim, I. Garishvili, F. Wei, D. Watanabe, V. S. Pantuev, M. Kofarago, Dipak Kumar Mishra, D. H. Kim, Petr Gallus, Prashant Shukla, M. Rosati, S. Zhou, Eva Haslum, M. D. Malik, E. Vznuzdaev, S. F. Pate, J. Hamblen, J. H. Bhom, I. V. Sourikova, S. D. Rolnick, Ke. Nakamura, K. O. Eyser, J. G. Rubin, T. V. Moukhanova, K. Okada, Y. Tanaka, Gary Grim, T. L. Thomas, E. Mannel, K. V. Dharmawardane, H. Al-Bataineh, J. A. Key, Charles Maguire, N. Feege, Y. Onuki, M. Sarsour, Mate Csanad, A. Iordanova, D. Reynolds, T. Sumita, C. Y. Chi, Kiyoshi Tanida, H. Ozaki, E. Kistenev, H. J. Moon, L. Baksay, H. En'yo, P. Lichtenwalner, M. J. Leitch, Dmitry Blau, J. Sun, S. Y. Han, L. Ding, Ryugo S. Hayano, J. Newby, Inkyu Park, Xiong Wang, E. J. Desmond, Ajit Kumar Mohanty, D. Roach, K. M. Kijima, Jiangyong Jia, Y. Goto, T. A. Shibata, C. L. Silva, T. Sato, Y. Riabov, Kenta Shigaki, M. Kurosawa, M. Nguyen, A. Dion, Z. Conesa del Valle, Dong Jo Kim, R. A. Soltz, E. Vazquez-Zambrano, Jan Rak, M. Nihashi, D. Ivanishchev, D. Hornback, V. Papavassiliou, Atsushi Takahara, A. S. Nyanin, Johannes Peter Wessels, K. A. Drees, Maya Hachiya Shimomura, R. S. Hollis, Hongfang Liu, D. E. Fields, R. Lacey, N. S. Bandara, Rachid Nouicer, A. N. Zelenski, M. Proissl, A. Taranenko, P. Sett, B. V. Jacak, Xingguo Li, Vladimir Samsonov, A. V. Kazantsev, D. Isenhower, Y. J. Kwon, M. Kasai, A. Toia, T. Moon, Y. Tsuchimoto, A. Veicht, D. Kleinjan, M. Grosse Perdekamp, M. Wysocki, I. Tserruya, R. Granier de Cassagnac, A. Adare, Christine Nattrass, Kazushi Miki, S. J. Jeon, Y. Iwanaga, R. P. Pisani, T. Todoroki, J. Klatsky, M. Jezghani, Yu. Efremenko, Brajesh K. Singh, V. Singh, M. McCumber, S. P. Sorensen, Beomkyu Kim, F. Giordano, M. E. Connors, Y. I. Makdisi, Aaron Angerami, I. E. Yushmanov, J. Jin, K. Das, E. M. Takagui, J. S. Kang, T. Koblesky, Tamas Ferenc Csorgo, N. Riveli, O. Chvala, W. A. Zajc, Takafumi Niida, L. Xue, S. K. Park, J. L. Nagle, K. B. Lee, P. Montuenga, L. Tomášek, C. Baumann, I. J. Choi, B. Xia, J. Hanks, M. Ouchida, V. Baublis, A. Denisov, Yuki Watanabe, M. K. Dayananda, N. Means, M. S. Daugherity, V. Cianciolo, J. G. Lajoie, Sung Keun Park, Dennis Perepelitsa, C. P. Singh, M. Towell, A. Glenn, B. M. Johnson, M. Alfred, T. Hachiya, S. Whitaker, D. Sharma, N. N. Ajitanand, Y. Fukao, Sergey Fokin, A. Enokizono, Prakhar Garg, B. Bannier, R. J. Petti, Jennifer E. Perry, Marisilvia Donadelli, V. Bumazhnov, D. Black, Eunja Kim, L. Patel, T. Hester, O. Dietzsch, H. Valle, P. Chung, K. Karatsu, S. Campbell, Min Soo Kim, A. Kravitz, G. D. N. Perera, Takahiro Nakamura, R. Tanabe, J. Sziklai, T. Jones, Peter Christiansen, Alexander Milov, I. Nakagawa, T. C. Awes, D. Winter, D. McGlinchey, Dipanwita Dutta, Kyoichiro Ozawa, T. Liška, Brian Cole, Anne Marie Sickles, H. A. Gustafsson, T. Murakami, Young-Ki Kim, T. Engelmore, N. Novitzky, B. Schaefer, D. Yu Peressounko, O. Drapier, Jun Kikuchi, Susumu Oda, C. Gal, Susumu Sato, A. Sen, Julia Velkovska, A. Datta, H. Asano, M. J. Tannenbaum, J. S. Bok, Frank Ellinghaus, M. Gonin, A. Durum, E. R. Kinney, P. Ružička, Rushan Han, N. Grau, A. J. Miller, D. P. Morrison, J. E. Frantz, Catherine Micaela Silvestre, A. Sukhanov, K. Kurita, Minghui Liu, K. Yamaura, Viktor Riabov, M. Leitgab, H. Torii, B. K. Schmoll, H. Pereira, Y. Morino, G. R. Young, Tatsuya Chujo, S. Sawada, M. Heffner, Motoi Inaba, J. Ying, A. Franz, C. O. Kim, A. Kim, S. Rembeczki, Kenneth Francis Read, J. Bryslawskyj, Senta Greene, R. M. Wright, A. T. Basye, B. Fadem, E. O'Brien, T. Kempel, Alice Mignerey, K. S. Sim, L. D'Orazio, S. Miyasaka, P. L. McGaughey, R. Yang, S. Taneja, Takao Sakaguchi, S. Beckman, K. Imai, A. D. Frawley, S. Huang, W. Holzmann, K. Watanabe, K. Shoji, M. Tomášek, T. Horaguchi, M. Beaumier, P. W. Stankus, K. S. Joo, Y. Imazu, H. Qu, Hideki Hamagaki, K. Aoki, G. David, K. I. Hahn, S. Esumi, R. Ichimiya, Martin Purschke, C. A. Aidala, Pawan Kumar Netrakanti, A. Morreale, Z. Fraenkel, V. Khachatryan, R. K. Choudhury, B. Meredith, B. Azmoun, A. Král, M. Oka, P. Kline, K. S. Lee, Y. Ikeda, P. Liebing, R. Akimoto, C. Pinkenburg, K. Dehmelt, G. Roche, S. Yokkaichi, Y. J. Mao, J. H. Kang, J. S. Haggerty, Y. S. Lai, G. S. Kyle, James Alexander, K. Sakashita, R. Averbeck, D. Kotov, S. Hasegawa, Byung-Sik Hong, A. Bazilevsky, A. Kiss, D. S. Jumper, Jason Kamin, Henner Buesching, Steve Edwards, Alexandre Lebedev, S. P. Stoll, S. S.E. Rosendahl, D. M. Lee, G. Bunce, D. Jouan, M. Chiu, C. A. Ogilvie, T. K. Hemmick, J. M. Durham, Yasuo Miake, K. DeBlasio, L. Kochenda, M. Issah, R. Pinson, S. Wolin, R. Pak, N. Apadula, C. Oakley, A. Drees, Marcus Hohlmann, B. Komkov, L. A. Linden Levy, Norio Saito, Tsutomu Mibe, M. A. L. Leite, K. Fujiwara, Jongmin Lee, Y. L. Yamaguchi, S. H. Lim, D. Lynch, R. Belmont, J. S. Kapustinsky, A. Taketani, V. Babintsev, T. Dahms, S. Mizuno, S. Dairaku, X. Jiang, H. W. Van Hecke, A. Meles, S. Bathe, Agneta Oskarsson, Y. Berdnikov, S. H. Lee, Y. Akiba, C. McKinney, S. Nagamiya, M. Virius, E. T. Atomssa, Manabu Togawa, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, J. C. Peng, J. D. Orjuela Koop, S. W. Nam, C. H. Chen, K. N. Barish, A. Manion, I. Ravinovich, M. Bai, Inseok Yoon, Zhiying You, R. Bennett, M. Kawashima, M. Finger, Y. Nakamiya, S. Sano, John Hill, M. L. Brooks, G. Baksay, B. Love, Toru Sugitate, François Fleuret, A. Sexton, Z. Rowan, M. Mendoza, S. N. White, Deepa Thomas, B. Sahlmueller, S. Yalcin, R. Seto, Zvi Hirsh Citron, H. Ge, K. Nakano, Y. J. Kim, J. T. Mitchell, I. Danchev, X. He, W. E. Sondheim, D. Ivanischev, Y. Aramaki, Robert Vertesi, R. Seidl, K. Boyle, T. Ichihara, J. Koster, H. Masui, Takahiro Fusayasu, A. Mwai, K. Kihara, Vladislav Manko, M. Slunečka, D. Silvermyr, W. J. Park, Christopher Rosen, A. Yanovich, S. Belikov, C. Vale, A. Timilsina, F. Matathias, Kensuke Homma, E. Richardson, B. Bassalleck, M. Konno, A. Deshpande, Y. Watanabe, I. Younus, H. Sako, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, Mihael Makek, M. Naglis, H. Nakagomi, T. Hoshino, Y. Gu, Masayasu Ishihara, J. H. Do, Taku Gunji, H. Gong, and J. Seele
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Meson ,media_common.quotation_subject ,Eta meson ,Asymmetry ,Nuclear physics ,Transverse plane ,Cross section (physics) ,Pseudorapidity ,High Energy Physics::Experiment ,Rapidity ,Nuclear Experiment ,Relativistic Heavy Ion Collider ,media_common - Abstract
We present a measurement of the cross section and transverse single-spin asymmetry (AN) for. mesons at large pseudorapidity from root s = 200 GeV p up arrow + p collisions. The measured cross section for 0.5 = 0.061 +/- 0.014. The results are consistent with prior transverse single-spin measurements of forward eta and pi(0) mesons at various energies in overlapping x(F) ranges. Comparison of different particle species can help to determine the origin of the large observed asymmetries in p up arrow + p collisions.
- Published
- 2014
35. System-size dependence of open-heavy-flavor production in nucleus-nucleus collisions atsNN=200GeV
- Author
-
L. Aphecetche, V. S. Pantuev, Mate Csanad, Alexei Khanzadeev, Johannes Peter Wessels, P. Tarján, Y. L. Yamaguchi, E. Stenlund, Eva Haslum, B. Lenzi, B. Komkov, R. Pak, John Hill, H. A. Torii, Toru Sugitate, L. D. Isenhower, N. Kamihara, Saskia Mioduszewski, R. Armendariz, N. Apadula, H. Sakata, A. Drees, J. Kubart, Marisilvia Donadelli, V. Bumazhnov, M. P. Comets, K. Okada, S. F. Pate, Y. J. Mao, S. Kametani, David D'Enterria, M. A. L. Leite, D. McGlinchey, T. Tabaru, S. Afanasiev, A. Ster, H. Al-Bataineh, Maya Hachiya Shimomura, A. V. Kazantsev, N. N. Ajitanand, M. Issah, H. En'yo, M. J. Leitch, François Fleuret, T. Ichihara, T. V. Moukhanova, M. Rosati, M. D. Malik, E. Vznuzdaev, D. Kawall, R. Vértesi, Osamu Jinnouchi, Matthew G. Reuter, Takahiro Fusayasu, Y. I. Makdisi, Alexander Milov, I. Nakagawa, Senta Greene, K. S. Joo, M. N. Wagner, J. Jin, Takahiro Nakamura, K. S. Sim, J. H. Kang, Alexander Malakhov, J. S. Haggerty, V. Papavassiliou, Jason Newby, V. Dzhordzhadze, Sébastien Gadrat, F. Matathias, J. E. Frantz, Robert F. Hobbs, E. M. Takagui, O. Drapier, Frank Ellinghaus, B. E. Norman, E. O'Brien, S. P. Sorensen, A. A. Vinogradov, D. Hornback, D. Silvermyr, Y. Fukao, A. Shevel, V. Babintsev, L. S. Zolin, E. R. Kinney, W. J. Park, L. Tomášek, V. I. Kochetkov, Rushan Han, A. Romana, S. Butsyk, B. Love, Kensuke Homma, P. Mikeš, Dylan Walker, A. Hadj Henni, P. D. Barnes, D. P. Morrison, Junji Tojo, A. Yanovich, S. Campbell, Y. Kwon, Susumu Oda, Vladimir Samsonov, T. Hester, J. Murata, Jiangyong Jia, Y. Goto, Debashish Pal, R. A. Soltz, H. Borel, S. Sawada, C. P. Singh, A. Taranenko, H. Iinuma, B. M. Johnson, E. J. Desmond, A. Durum, Wei Xie, J. Ying, V. E. Semenov, A. Franz, M. B. Deaton, Gerd Joachim Kunde, J. Zimányi, M. Togawa, P. Constantin, Kazushi Miki, S. Chernichenko, J. Park, A. P.T. Palounek, A. Rakotozafindrabe, S. N. White, I. Shein, H. Hiejima, S. Esumi, A. Isupov, C. Suire, Tatsuya Chujo, K. Dehmelt, M. J. Tannenbaum, D. Sharma, Y. Tsuchimoto, Catherine Micaela Silvestre, B. Bassalleck, Jen-Chieh Peng, J. Sziklai, M. Grosse Perdekamp, K. Nakano, Tamas Ferenc Csorgo, A. G. Litvinenko, I. E. Yushmanov, Eun-Hee Kim, Tae-Yeon Lee, J. G. Lajoie, Martin Purschke, T. C. Awes, Kyoichiro Ozawa, T. Liška, M. Konno, W. E. Sondheim, Brian Cole, J. L. Nagle, K. Das, C. A. Aidala, T. Hachiya, M. K. Lee, H. A. Gustafsson, K. Imai, D. Mukhopadhyay, M. Mitrovski, R. S. Towell, V-N. Tram, K. Boyle, P. A. Rukoyatkin, Y. Tanaka, Y. S. Lai, Jun Kikuchi, I. Garishvili, Akio Kiyomichi, Xiong Wang, Z. Yasin, E. P. Hartouni, Henner Buesching, Y. Nakamiya, D. Kotchetkov, Dong Jo Kim, I. J. Choi, A. Kravitz, N. Kurihara, S. Baumgart, C. Zhang, J. Gosset, M. Naglis, M. Wysocki, S. Rembeczki, G. Baksay, Jan Rak, C. L. Silva, O. Dietzsch, Minghui Liu, Motoi Inaba, R. Lacey, A. Kozlov, A. Morreale, D. E. Fields, B. V. Jacak, C. Y. Chi, G. S. Kyle, I. Tserruya, R. Granier de Cassagnac, A. Adare, E. T. Atomssa, M. Heffner, Kenneth Francis Read, Yu. Efremenko, H. Valle, M. Gonin, Viktor Riabov, Nagahiro Saito, Z. Fraenkel, V. Singh, Masayasu Ishihara, J. Chiba, M. McCumber, R. Seto, K. Haruna, Tadaaki Isobe, James Alexander, F. Staley, B. Sahlmueller, A. Deshpande, L. Baksay, B. Azmoun, A. Král, M. J. Kweon, Marcus Hohlmann, S. Yokkaichi, W. A. Zajc, H. Pei, V. Baublis, P. L. McGaughey, J. T. Mitchell, Takao Sakaguchi, D. Winter, R. Averbeck, A. Denisov, V. Cianciolo, Byung-Sik Hong, Julia Velkovska, D. Yu Peressounko, Anne Marie Sickles, K. Kurita, A. Bazilevsky, H. Pereira, M. Chiu, Sergey Fokin, X. He, O. O. Omiwade, J. G. Boissevain, M. Oka, R. Seidl, Philippe Rosnet, Vladislav Manko, A. Dion, Masashi Kaneta, C. Klein-Boesing, Alexandre Lebedev, A. D. Frawley, Y. Watanabe, V. Peresedov, T. Horaguchi, M. Slunečka, D. M. Lee, S. Bathe, C. Pinkenburg, A. Enokizono, I. Younus, S. H. Aronson, G. R. Young, C. A. Ogilvie, T. K. Hemmick, Yasuo Miake, M. Stepanov, G. Roche, L. Kochenda, Hiroaki Ohnishi, Agneta Oskarsson, John Matthew Durham, A. Soldatov, J. Egdemir, S. Batsouli, H. Masui, A. K. Dubey, S. Belikov, W. Holzmann, Jason Kamin, Charles Maguire, S. P. Stoll, Y. Berdnikov, Y. Akiba, A. A. Bickley, S. S.E. Rosendahl, G. Bunce, M. Mishra, A. Churyn, D. Jouan, S. Nagamiya, T. L. Thomas, C. Vale, B. S. Chang, S. Takagi, K. N. Barish, Vaclav Vrba, Klaus Johannes Reygers, J. Klay, Kiyoshi Tanida, E. Kistenev, Xingguo Li, K. O. Eyser, A. K. Purwar, K. Fujiwara, Ryugo S. Hayano, H. Harada, Y. Riabov, Kenta Shigaki, M. Nguyen, M. L. Brooks, H. W. Van Hecke, A. S. Nyanin, Rachid Nouicer, M. Ouchida, J. Asai, D. Lynch, Shingo Sakai, C. R. Cleven, C. Haegemann, Y. Inoue, A. Taketani, C. L. Woody, Dong-Hun Kim, V. L. Rykov, T. Dahms, N. Grau, K. Shoji, O. Zaudtke, P. W. Stankus, M. Virius, I. V. Sourikova, Steven E. Skutnik, A. Glenn, I. Ravinovich, Y. Nagata, H. Qu, R. Bennett, M. Finger, Hideki Hamagaki, K. Aoki, G. David, T. A. Shibata, D. Isenhower, A. Toia, L. Mašek, H. Kanou, Taku Gunji, H. Gong, J. Seele, F. Kajihara, H. Delagrange, S. Zhou, A. Baldisseri, J. L. Charvet, T. E. Miller, P. Chung, Susumu Sato, and W. S. Emam
- Subjects
Physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,Quantitative Biology::Neurons and Cognition ,010308 nuclear & particles physics ,Hadron ,chemistry.chemical_element ,Electron ,01 natural sciences ,7. Clean energy ,Copper ,Nuclear physics ,medicine.anatomical_structure ,chemistry ,0103 physical sciences ,medicine ,High Energy Physics::Experiment ,Charm (quantum number) ,Atomic physics ,Nuclear Experiment ,010306 general physics ,Nucleon ,Relativistic Heavy Ion Collider ,Nucleus - Abstract
The PHENIX Collaboration at the Relativistic Heavy Ion Collider has measured open-heavy-flavor production in Cu + Cu collisions at v root s(NN) = 200 GeV through the measurement of electrons at midrapidity that originate from semileptonic decays of charm and bottom hadrons. In peripheral Cu + Cu collisions an enhanced production of electrons is observed relative to p + p collisions scaled by the number of binary collisions. In the transverse momentum range from 1 to 5 GeV/c the nuclear modification factor is R-AA similar to 1.4. As the system size increases to more central Cu + Cu collisions, the enhancement gradually disappears and turns into a suppression. For p(T) > 3 GeV/c, the suppression reaches R-AA similar to 0.8 in the most central collisions. The p(T) and centrality dependence of R-AA in Cu + Cu collisions agree quantitatively with R-AA in d + Au and Au + Au collisions, if compared at a similar number of participating nucleons .
- Published
- 2014
36. Centrality categorization forRp(d)+Ain high-energy collisions
- Author
-
Hongfang Liu, D. E. Fields, Charles Maguire, B. V. Jacak, L. Tomášek, Soren Pontoppidan Sorensen, Marisilvia Donadelli, M. McCumber, M. Naglis, J. T. Mitchell, X. Jiang, V. Bumazhnov, K. B. Lee, R. Seidl, Vladislav Manko, M. Slunečka, D. Hornback, E. Kistenev, Alexander Milov, I. Nakagawa, R. S. Towell, Kyoichiro Ozawa, T. Liška, I. Garishvili, F. Wei, Henner Buesching, J. Hanks, Steve Edwards, H. A. Gustafsson, S. Belikov, P. Ružička, J. S. Bok, Jun Kikuchi, Viktor Riabov, Masayasu Ishihara, Gary Grim, K. A. Drees, Alexei Khanzadeev, K. V. Dharmawardane, R. Tanabe, T. Engelmore, Youngil Kwon, P. Lichtenwalner, Marcus Hohlmann, Frank Ellinghaus, C. Vale, B. Meredith, A. Taranenko, J. B. Choi, D. Roach, K. M. Kijima, B. Azmoun, F. Fleuret, L. A. Linden Levy, A. Král, Yorito Yamaguchi, E. R. Kinney, Aaron Angerami, Kazushi Miki, Sung Keun Park, W. A. Zajc, F. Matathias, Minghui Liu, Kensuke Homma, E. Richardson, R. Pak, V. Baublis, K. Fujiwara, A. Deshpande, A. Denisov, V. Cianciolo, John Hill, D. P. Morrison, S. Campbell, Sergey Fokin, Xingguo Li, C. Y. Chi, Brajesh K. Singh, N. N. Ajitanand, M. Heffner, Alexander Nyanin, Kenneth Francis Read, B. Bassalleck, H. Pei, Rushan Han, Prashant Shukla, K. Karatsu, Toru Sugitate, M. Konno, M. Oka, S. F. Pate, A. Sukhanov, K. Kurita, Y. Nakamiya, J. H. Bhom, Takahiro Nakamura, Y. Watanabe, C. Baumann, K. S. Lee, Tatsuya Chujo, H. W. Van Hecke, H. Pereira, Y. Morino, C. P. Singh, I. Younus, G. Baksay, D. McGlinchey, Senta Greene, V. S. Pantuev, Vladimir Samsonov, N. Apadula, C. Oakley, B. Komkov, Susumu Oda, B. M. Johnson, T. V. Moukhanova, A. Dion, M. I. Nagy, A. Drees, K. Das, I. Tserruya, Yu. Efremenko, Ke. Nakamura, D. Kawall, O. Dietzsch, Anne Marie Sickles, S. Bathe, Terry C Awes, Dmitry Blau, B. Sahlmueller, A. T. Basye, E. T. Atomssa, P. Liebing, S. Tarafdar, A. Durum, P. L. McGaughey, H. Themann, H. Al-Bataineh, R. J. Petti, Martin Purschke, Johannes Peter Wessels, V. Singh, H. Valle, Y. J. Kim, Y. Akiba, Tsutomu Mibe, E. J. Desmond, B. Fadem, C. A. Aidala, S. Nagamiya, M. A. L. Leite, Catherine Micaela Silvestre, J. Murata, J. Sziklai, M. Ouchida, Tamas Ferenc Csorgo, E. O'Brien, K. Sakashita, Brian Cole, Dipanwita Dutta, Vaclav Vrba, Klaus Johannes Reygers, O. Chvala, K. Yamaura, Rui Wei, S. N. White, E. Vazquez-Zambrano, Gerd Joachim Kunde, Eva Haslum, I. Shein, M. Kurosawa, J. L. Nagle, A. Morreale, Beomkyu Kim, R. A. Soltz, N. Means, Julia Velkovska, Ju Hwan Kang, R. Belmont, J. S. Kapustinsky, Deepa Thomas, J. G. Lajoie, V. Babintsev, O. Drapier, V. Papavassiliou, K. Sedgwick, J. Hamblen, Z. Fraenkel, Zvi Hirsh Citron, M. Rosati, Jason Kamin, I. J. Choi, A. Kravitz, M. Grosse Perdekamp, A. Glenn, K. Nakano, M. Kasai, Y. Tsuchimoto, S. P. Stoll, Y. Iwanaga, G. S. Kyle, James Alexander, R. K. Choudhury, K. S. Joo, Dennis Perepelitsa, M. E. Connors, Eunja Kim, W. E. Sondheim, D. Ivanischev, I. E. Yushmanov, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, S. S.E. Rosendahl, G. Bunce, K. Boyle, G. R. Young, Alexandre Lebedev, M. K. Dayananda, J. Jin, D. M. Lee, T. Ichihara, D. Sharma, R. Ichimiya, D. Jouan, D. Watanabe, M. D. Malik, Jiangyong Jia, Y. Goto, E. M. Takagui, Y. Tanaka, M. Wysocki, Jason Newby, J. E. Frantz, E. Vznuzdaev, T. L. Thomas, David Olle Rickard Silvermyr, K. Tanida, T. Jones, Inkyu Park, M. Chiu, Takahiro Fusayasu, E. Mannel, Nagahiro Saito, K. Okada, Xiong Wang, Z. Conesa del Valle, C. A. Ogilvie, D. Kleinjan, T. Murakami, T. K. Hemmick, H. En'yo, Ryugo S. Hayano, J. M. Durham, Peter Christiansen, D. Winter, D. Yu Peressounko, ShinIchi Esumi, M. J. Leitch, K. S. Sim, L. Kochenda, M. Issah, Y. Riabov, W. J. Park, Jongmin Lee, H. J. Moon, L. Baksay, Christopher Rosen, Kenta Shigaki, M. Nguyen, S. Sawada, A. Yanovich, E. Stenlund, R. Yang, J. Ying, Rachid Nouicer, M. Proissl, A. Franz, S. Taneja, A. Veicht, D. Lynch, K. Imai, C. L. Woody, Y. Onuki, A. Caringi, Jan Rak, R. Lacey, R. Granier de Cassagnac, A. Adare, I. V. Sourikova, A. Taketani, D. S. Jumper, K. N. Barish, S. Nam, T. Dahms, S. Sano, M. L. Brooks, X. He, I. Ravinovich, Y. Aramaki, Robert Vertesi, J. Koster, H. Masui, B. Love, R. Seto, I. Danchev, M. Bai, Zhiying You, R. Bennett, M. Kawashima, Mate Csanad, M. Finger, S. Dairaku, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, Y. J. Mao, Y. Miake, M. Virius, Manabu Togawa, H. Qu, J. S. Haggerty, Anders Nils Erik Oskarsson, M. Nihashi, D. J. Kim, Y. S. Lai, Hideki Hamagaki, K. Aoki, J. C. Peng, J. D. Orjuela Koop, G. David, K. I. Hahn, C. H. Chen, S. Yokkaichi, Y. Ikeda, M. Gonin, R. P. Pisani, C. Pinkenburg, D. Isenhower, K. Watanabe, A. Toia, G. Roche, K. Shoji, T. Horaguchi, Y. Fukao, P. W. Stankus, T. Hester, N. Grau, T. Kempel, Motoi Inaba, R. M. Wright, Maya Hachiya Shimomura, Y. I. Makdisi, Taku Gunji, H. Gong, J. Seele, F. Kajihara, M. J. Tannenbaum, H. Torii, A. Kim, S. Rembeczki, S. Butsyk, Alice Mignerey, L. D'Orazio, Takao Sakaguchi, S. Zhou, A. D. Frawley, S. Huang, W. Holzmann, S. D. Rolnick, A. Enokizono, P. Chung, A. Datta, and A. V. Kazantsev
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Nuclear Theory ,Monte Carlo method ,Parton ,Gluon ,Hadronization ,Nuclear physics ,Neutron ,Rapidity ,Impact parameter ,Nuclear Experiment ,Relativistic Heavy Ion Collider - Abstract
High-energy proton- and deuteron-nucleus collisions provide an excellent tool for studying a wide array of physics effects, including modifications of parton distribution functions in nuclei, gluon saturation, and color neutralization and hadronization in a nuclear environment, among others. All of these effects are expected to have a significant dependence on the size of the nuclear target and the impact parameter of the collision, also known as the collision centrality. In this article, we detail a method for determining centrality classes in p(d) + A collisions via cuts on the multiplicity at backward rapidity (i.e., the nucleus-going direction) and for determining systematic uncertainties in this procedure. For d + Au collisions at root s(NN) = 200 GeV we find that the connection to geometry is confirmed by measuring the fraction of events in which a neutron from the deuteron does not interact with the nucleus. As an application, we consider the nuclear modification factors Rp(d)+A, for which there is a bias in the measured centrality-dependent yields owing to auto correlations between the process of interest and the backward-rapidity multiplicity. We determine the bias-correction factors within this framework. This method is further tested using the HIJING Monte Carlo generator. We find that for d + Au collisions at root s(NN) = 200 GeV, these bias corrections are small and vary by less than 5% (10%) up to p(T) = 10 (20) GeV/c. In contrast, for p + Pb collisions at v root s(NN) = 5.02 TeV we find that these bias factors are an order of magnitude larger and strongly pT dependent, likely attributable to the larger effect of multiparton interactions.
- Published
- 2014
37. Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarizedp+pcollisions ats=200and 62.4 GeV
- Author
-
R. S. Towell, I. Garishvili, X. Jiang, S. Bathe, Agneta Oskarsson, Tadaaki Isobe, Y. Fukao, M. Naglis, Y. Berdnikov, T. Hester, Y. Akiba, M. Mishra, Sung Keun Park, T. Ichihara, P. Tarján, I. Tserruya, Takahiro Fusayasu, Aaron Angerami, S. Nagamiya, C. M. Camacho, Alexander Malakhov, Masayasu Ishihara, D. Silvermyr, P. L. McGaughey, Vaclav Vrba, Klaus Johannes Reygers, L. S. Zolin, W. J. Park, N. N. Ajitanand, Christopher Rosen, A. Hadj Henni, Prashant Shukla, Yu. Efremenko, Charles Maguire, P. D. Barnes, A. Yanovich, V. Singh, Rui Wei, S. F. Pate, B. Meredith, Ke. Nakamura, John Hill, M. Chiu, Toru Sugitate, François Fleuret, M. Ouchida, W. A. Zajc, Y. J. Mao, V. Baublis, S. N. White, Deepa Thomas, S. W. Nam, Beomkyu Kim, Wei Xie, D. Kawall, Zvi Hirsh Citron, N. Means, Takahiro Nakamura, A. Denisov, V. Cianciolo, K. Nakano, M. Rosati, Kiyoshi Tanida, J. Asai, H. Al-Bataineh, H. Themann, W. E. Sondheim, Maya Hachiya Shimomura, C. A. Ogilvie, F. Matathias, Kensuke Homma, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, J. Murata, E. Richardson, J. H. Kang, E. Kistenev, D. McGlinchey, Susumu Oda, Y. Tomita, Sergey Fokin, T. K. Hemmick, V-N. Tram, N. Grau, J. S. Haggerty, J. M. Durham, A. Glenn, Yasuo Miake, Y. I. Makdisi, B. Komkov, Senta Greene, K. S. Sim, Gerd Joachim Kunde, I. Shein, Shingo Sakai, P. Constantin, S. Chernichenko, P. Lichtenwalner, V. Dzhordzhadze, A. Durum, V. Papavassiliou, Motoi Inaba, Eunja Kim, A. Kiss, R. M. Wright, Tae-Yeon Lee, Ajit Kumar Mohanty, Henner Buesching, Y. Kwon, Steve Edwards, T. A. Shibata, C. L. Silva, F. Wei, K. A. Drees, Gary Grim, Norio Saito, Tsutomu Mibe, M. A. L. Leite, B. Bassalleck, K. Yamaura, I. Ravinovich, Dmitry Blau, A. A. Vinogradov, A. T. Basye, M. J. Tannenbaum, C. L. Woody, A. Berdnikov, K. Sedgwick, L. Kochenda, M. Issah, R. Yang, K. V. Dharmawardane, S. Afanasiev, M. Konno, Alberto Baldisseri, A. Ster, Mate Csanad, T. Sato, H. Pei, S. Taneja, Martin Purschke, C. A. Aidala, H. Torii, Jiangyong Jia, Y. Goto, Alexander Milov, I. Nakagawa, Minghui Liu, T. Kempel, Dong-Hun Kim, Marcus Hohlmann, Takafumi Niida, M. Nihashi, T. Engelmore, B. Fadem, E. O'Brien, K. Imai, L. A. Linden Levy, A. Deshpande, E. J. Desmond, N. Feege, David D'Enterria, O. Drapier, Frank Ellinghaus, H. Iinuma, M. K. Dayananda, A. Kim, D. Mukhopadhyay, S. Rembeczki, R. Belmont, J. S. Kapustinsky, M. Heffner, E. R. Kinney, D. P. Morrison, Kenneth Francis Read, A. V. Kazantsev, V. S. Pantuev, L. Aphecetche, D. Kleinjan, P. Mikeš, Y. S. Lai, A. Yu. Semenov, A. Dion, J. Gosset, Hongfang Liu, D. E. Fields, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, V. Babintsev, G. S. Kyle, K. Karatsu, M. Wysocki, S. Campbell, V. E. Semenov, Anne Marie Sickles, A. Caringi, Y. Watanabe, Alice Mignerey, S. Belikov, L. D'Orazio, K. Watanabe, I. Younus, I. V. Sourikova, T. L. Thomas, L. Tomášek, B. V. Jacak, K. O. Eyser, A. K. Purwar, K. Fujiwara, Y. L. Yamaguchi, R. P. Pisani, Tatsuya Chujo, Jen-Chieh Peng, T. Murakami, James Alexander, J. Hamblen, Johannes Peter Wessels, A. Soldatov, M. Togawa, E. Vazquez-Zambrano, J. Park, A. Rakotozafindrabe, K. Shoji, D. Isenhower, K. Okada, K. Sakashita, Takao Sakaguchi, Ryugo S. Hayano, K. Das, E. P. Hartouni, R. Averbeck, M. McCumber, M. Kasai, Y. Tsuchimoto, Byung-Sik Hong, M. Bai, Inkyu Park, P. W. Stankus, A. Bazilevsky, Xiong Wang, C. Klein-Boesing, Y. Tanaka, H. En'yo, A. Toia, Y. Riabov, L. Mašek, Kenta Shigaki, E. Mannel, Y. Iwanaga, Z. Conesa del Valle, C. Vale, B. S. Chang, Philippe Rosnet, M. J. Leitch, M. Nguyen, A. P.T. Palounek, S. Sawada, O. Dietzsch, A. D. Frawley, S. Yokkaichi, Dong Jo Kim, H. W. Van Hecke, C. Y. Chi, G. R. Young, A. S. Nyanin, E. T. Atomssa, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, Jun Kikuchi, J. Klay, Alexandre Lebedev, Rachid Nouicer, M. Proissl, H. Valle, J. Ying, S. Huang, A. Franz, I. E. Yushmanov, Eun-Hee Kim, M. I. Nagy, H. J. Moon, F. Staley, L. Baksay, A. Veicht, D. M. Lee, Y. Onuki, Jason Kamin, Y. Ikeda, Dipanwita Dutta, Y. Nakamiya, S. P. Stoll, W. Holzmann, J. G. Boissevain, R. Vértesi, D. Hornback, D. Watanabe, Jan Rak, J. Hanks, A. Morreale, M. D. Malik, R. Lacey, Julia Velkovska, C. Baumann, S. Kametani, R. Granier de Cassagnac, K. Kiriluk, A. Adare, G. Baksay, S. S.E. Rosendahl, E. Vznuzdaev, H. A. Gustafsson, J. L. Charvet, C. Pinkenburg, Zhiying You, R. Bennett, M. Kawashima, G. Bunce, A. Taranenko, Jason Newby, M. Stepanov, G. Roche, Kazushi Miki, J. E. Frantz, A. Churyn, C. P. Singh, B. M. Johnson, T. Horaguchi, B. Sahlmueller, C. Zhang, Z. Fraenkel, D. Jouan, M. Finger, R. Pak, Brajesh K. Singh, Y. J. Kim, N. Kamihara, Alexei Khanzadeev, Jongmin Lee, E. Stenlund, J. B. Choi, P. Ružička, C. Oakley, A. Drees, R. J. Petti, A. Isupov, C. Suire, Herve Borel, D. Lynch, Viktor Riabov, J. H. Bhom, S. Tarafdar, H. Qu, T. V. Moukhanova, J. Sziklai, A. Taketani, A. Enokizono, Brian Cole, Eva Haslum, B. Lenzi, D. S. Jumper, V. L. Rykov, T. Dahms, P. Chung, R. K. Choudhury, S. Dairaku, M. Kurosawa, O. Zaudtke, J. Imrek, K. S. Joo, M. Virius, C. H. Chen, Hideki Hamagaki, K. Aoki, G. David, K. I. Hahn, A. Datta, J. Jin, E. M. Takagui, Taku Gunji, H. Gong, J. Seele, N. Apadula, F. Kajihara, A. Vossen, S. Butsyk, S. Esumi, D. Sharma, S. Zhou, R. Ichimiya, B. Azmoun, A. Král, M. J. Kweon, S. D. Rolnick, M. Oka, K. S. Lee, P. Liebing, R. A. Soltz, M. Grosse Perdekamp, M. E. Connors, T. Jones, Peter Christiansen, D. Winter, D. Yu Peressounko, K. B. Lee, B. Love, A. G. Litvinenko, A. Kozlov, R. Seto, K. Haruna, D. Roach, K. M. Kijima, I. Danchev, X. He, Y. Aramaki, V. Peresedov, J. Koster, Xingguo Li, M. Gonin, S. Batsouli, H. Masui, A. K. Dubey, A. A. Bickley, Vladimir Samsonov, A. Sukhanov, K. Kurita, K. N. Barish, H. Pereira, Y. Morino, S. Sano, Tamas Ferenc Csorgo, J. L. Nagle, M. L. Brooks, S. P. Sorensen, C. Silvestre, O. Chvala, Seong H. Kim, Marisilvia Donadelli, V. Bumazhnov, J. G. Lajoie, R. Tanabe, D. Layton, W. C. Chang, I. J. Choi, A. Kravitz, and Rushan Han
- Subjects
Quark ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Meson ,010308 nuclear & particles physics ,Nuclear Theory ,Hadron ,01 natural sciences ,Gluon ,Nuclear physics ,Pion ,0103 physical sciences ,High Energy Physics::Experiment ,Rapidity ,PHENIX detector ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider - Abstract
Measurements of transverse-single-spin asymmetries (A(N)) in p + p collisions at root s = 62.4 and 200 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider are presented. At midrapidity, A(N) is measured for neutral pion and eta mesons reconstructed from diphoton decay, and, at forward rapidities, neutral pions are measured using both diphotons and electromagnetic clusters. The neutral-pion measurement of A(N) at midrapidity is consistent with zero with uncertainties a factor of 20 smaller than previous publications, which will lead to improved constraints on the gluon Sivers function. At higher rapidities, where the valence quark distributions are probed, the data exhibit sizable asymmetries. In comparison with previous measurements in this kinematic region, the new data extend the kinematic coverage in root s and p(T), and it is found that the asymmetries depend only weakly on root s. The origin of the forward A(N) is presently not understood quantitatively. The extended reach to higher p(T) probes the transition between transverse momentum dependent effects at low p(T) and multiparton dynamics at high p(T).
- Published
- 2014
38. Transverse-energy distributions at midrapidity inp+p,d+Au, andAu+Aucollisions atsNN=62.4–200 GeV and implications for particle-production models
- Author
-
J. M. Burward-Hoy, R. A. Soltz, V. Bumazhnov, M. P. Comets, P. Rosnet, Vladislav Manko, Y. J. Kwon, Saskia Mioduszewski, W. C. Smith, Robert F. Hobbs, L. Sanfratello, W. C. Chang, Ferenc Deák, N. Kamihara, M. K. Lee, Yves Roland Schutz, F. Matathias, R. Armendariz, X. Camard, M. N. Hagiwara, Debashish Pal, S. Sawada, S. Butsyk, C. Vale, Vladimir Samsonov, A. Drees, I. Otterlund, J. Jin, A. Franz, A. Devismes, E. M. Takagui, T. L. Thomas, Taku Gunji, B. D. Fox, F. Kajihara, B. Espagnon, K. Das, E. P. Hartouni, R. S. Towell, H. Delagrange, C. H. Kuberg, Tamas Ferenc Csorgo, Akio Kiyomichi, O. Zaudtke, J. Chiba, H. W. Van Hecke, J. L. Nagle, V. S. Pantuev, N. Kurihara, S. Zhou, M. A. Volkov, M. Harvey, Y. S. Kim, M. Wysocki, B. Khachaturov, T. Matsumoto, M. G. Hur, C. Y. Chi, Y. Cobigo, M. Grosse Perdekamp, Ryugo S. Hayano, K. Hasuko, C. A. Ogilvie, M. Chiu, Ajit Kumar Mohanty, Kensuke Homma, T. A. Shibata, A. Deshpande, J. L. Drachenberg, K. Okada, T. K. Hemmick, N. N. Ajitanand, H. Kobayashi, A. Pierson, S. Bathe, Agneta Oskarsson, I. Ravinovich, G. C. Mishra, Y. Nagata, S. Chernichenko, H. En'yo, P. Constantin, Yasuo Miake, M. J. Leitch, H. Lim, Marie Germain, T. Ichihara, S. C. Johnson, B. Bassalleck, Y. Berdnikov, D. Isenhower, Joakim Nystrand, Takao Sakaguchi, S. S. Ryu, N. Grau, S. F. Pate, Eva Haslum, C. P. Singh, Y. Akiba, C. Klein-Boesing, Osamu Jinnouchi, H. Pei, M. Konno, German Martinez, Y. Riabov, Kenta Shigaki, David Olle Rickard Silvermyr, K. Shoji, S. Nagamiya, Kazuhiro Tanaka, B. M. Johnson, Takahiro Nakamura, A. D. Frawley, L. Kochenda, F. K. Wohn, Matthew G. Reuter, Klaus Johannes Reygers, B. Azmoun, M. J. Kweon, R. Bennett, A. Isupov, C. Suire, X. R. Wang, S. Afanasiev, M. Nguyen, D. Winter, D. Yu Peressounko, A. Ster, P. W. Stankus, Ahmed Al-Jamel, S. H. Aronson, T. Kawagishi, T. E. Miller, A. G. Litvinenko, J. E. Frantz, J. Sziklai, R. Santo, A. Enokizono, A. S. Nyanin, A. Kiss, G. Roche, Y. Le Bornec, S. P. Sorensen, W. Holzmann, Herve Borel, Brian Cole, M. Holmes, P. Tarján, Sean A. Kelly, Henner Buesching, A. Glenn, A. Taketani, R. Kohara, I. D. Ojha, Alexander Malakhov, V. L. Rykov, T. Dahms, Viktor Veszpremi, V. Papavassiliou, Maya Hachiya Shimomura, P. Chand, Y. I. Makdisi, J. Egdemir, T. Shohjoh, Y. Watanabe, A. Durum, C. R. Cleven, A. Dion, B. Forestier, M. T. Bjorndal, J. G. Boissevain, I. Younus, Masashi Kaneta, E. Kim, S. P. Stoll, A. Kozlov, L. S. Zolin, K. S. Sim, T. Tabaru, P. J. Kroon, R. Seto, K. Haruna, A. Taranenko, M. J. Tannenbaum, D. S. Brown, Senta Greene, W. J. Park, S. Belikov, K. S. Joo, V. V. Ikonnikov, Junji Tojo, S. S.E. Rosendahl, B. Sahlmueller, G. Bunce, A. Soldatov, B. E. Norman, E. O'Brien, K. Katou, P. D. Barnes, Steven E. Skutnik, D. Mukhopadhyay, V. Dzhordzhadze, D. Bucher, H. J. Kim, H. Qu, A. Yanovich, C. L. Woody, M. Inuzuka, Hideki Hamagaki, K. Aoki, D. E. Fields, G. David, X. He, O. O. Omiwade, B. V. Jacak, C. Pinkenburg, M. Naglis, S. Y. Fung, H. Hiejima, D. Jouan, A. K. Purwar, V. Peresedov, C. L. Silva, John Hill, K. Oyama, M. Stepanov, S. Esumi, Toru Sugitate, L. D. Isenhower, D. Sharma, Masayasu Ishihara, Susumu Sato, H. Masui, A. K. Dubey, J. Gosset, J. P. Sullivan, S. Takagi, M. Muniruzzaman, Martin Purschke, C. A. Aidala, F. Gastineau, K. N. Barish, I. V. Sourikova, H. Torii, François Fleuret, K. Imai, S. N. White, J. G. Lajoie, V. I. Kochetkov, J. Murata, T. J. Uam, D. Kotchetkov, M. L. Brooks, Gerd Joachim Kunde, W. E. Sondheim, I. Shein, S. Yokkaichi, J. M. Heuser, T. Hachiya, K. Boyle, P. A. Rukoyatkin, Alberto Baldisseri, Z. Fraenkel, Y. J. Mao, S. Kametani, Pàl Hidas, Anne Marie Sickles, Y. Tanaka, J. H. Kang, J. S. Haggerty, T. K. Shea, A. Romana, R. K. Choudhury, A. G. Hansen, Shingo Sakai, S. Gadrat, Nagahiro Saito, F. Staley, Charles Maguire, S. Leckey, G. R. Young, I. J. Choi, Josh Moss, Kiyoshi Tanida, E. Kistenev, Hiroaki Ohnishi, H. Harada, Y. Fukao, Jan Rak, R. Lacey, R. Granier de Cassagnac, V-N. Tram, J. M. Qualls, Motoi Inaba, M. Sarsour, Mate Csanad, David D'Enterria, R. P. Pisani, Xingguo Li, M. Gonin, Nikolay Tyurin, V.N. Penev, M. N. Wagner, K. Kurita, H. Pereira, Minghui Liu, M. Heffner, Kenneth Francis Read, Tadaaki Isobe, J. S. Chai, P. L. McGaughey, A. V. Kazantsev, Alexei Khanzadeev, N. Bruner, E. Stenlund, Jen-Chieh Peng, T. V. Moukhanova, E. J. Desmond, Dong Jo Kim, Jean-Pierre Cussonneau, M. Togawa, T. C. Awes, Kyoichiro Ozawa, J. Park, Florian Bauer, Jun Kikuchi, Y. Tsuchimoto, I. E. Yushmanov, Eun-Hee Kim, R. Vértesi, Ch. Finck, Jason Newby, Alexander Milov, O. Drapier, M. Rosati, M. Velkovsky, E. R. Kinney, D. P. Morrison, A. A. Vinogradov, Henrik Tydesjö, H. A. Gustafsson, S. Campbell, Jiangyong Jia, Y. Goto, V. E. Semenov, J. Zimányi, C. Zhang, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, V. Singh, G. B. Kim, Viktor Riabov, B. Komkov, O. Dietzsch, H. Valle, S. Batsouli, Dipanwita Dutta, Julia Velkovska, M. A. L. Leite, Hirohiko Sato, S. K. Tuli, H. Iinuma, M. C. McCain, A. P.T. Palounek, V. Babintsev, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, Sergey Fokin, T. Horaguchi, A. Hoover, S. S. Adler, G. S. Kyle, N. Willis, James Alexander, M. Issah, M. D. Malik, E. Vznuzdaev, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Alexandre Lebedev, D. M. Lee, Xiaopeng Zong, L. Aphecetche, Takeo Kawabata, Johannes Peter Wessels, A. Hadj Henni, Wei Xie, and J. T. Mitchell
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Transverse plane ,Deuterium ,Production model ,High Energy Physics::Experiment ,Nuclear Experiment ,16. Peace & justice ,Nucleon ,Glauber ,Ansatz - Abstract
Measurements of the midrapidity transverse-energy distribution, dE(T)/d eta, are presented for p + p, d+Au, and Au+Au collisions atv root s(NN) = 200 GeV and additionally for Au+Au collisions atv root s(NN) = 62.4 and 130 GeV. The dE(T)/d eta distributions are first compared with the number of nucleon participants N-part, number of binary collisions N-coll, and number of constituent-quark participants N-qp calculated from a Glauber model based on the nuclear geometry. For Au+Au, /N-part increases with N-part, while /N-qp is approximately constant for all three energies. This indicates that the two-component ansatz, dE(T)/d eta alpha (1 - x)N-part/2 + xN(coll), which was used to represent E-T distributions, is simply a proxy for N-qp, and that the N-coll term does not represent a hard-scattering component in E-T distributions. The dE(T)/d eta distributions of Au+Au and d+Au are then calculated from the measured p + p E-T distribution using two models that both reproduce the Au+Au data. However, while the number-of-constituent-quark-participant model agrees well with the d+Au data, the additive-quark model does not.
- Published
- 2014
39. Heavy-flavor electron-muon correlations inp+pandd+Aucollisions atsNN=200GeV
- Author
-
Yuhei Morino, Mate Csanad, C. L. Woody, B. Azmoun, Y. J. Mao, A. Král, J. E. Frantz, Jongmin Lee, Herve Borel, A. Berdnikov, A. Taketani, Hiromi Iinuma, D. S. Jumper, Makoto Oka, Tadaaki Isobe, V. L. Rykov, K. O. Eyser, A. Caringi, Senta Greene, P. Rosnet, M. Nihashi, Vladimir Samsonov, M. Gonin, Y. Onuki, David D'Enterria, Bruno Lenzi, K. Fujiwara, M. K. Dayananda, K. S. Lee, I. Ravinovich, A. Dion, M. Slunečka, E. Kistenev, M. Bai, S. Dairaku, Zhiying You, R. Bennett, T. L.T. Thomas, M. Finger, O. Zaudtke, P. L. McGaughey, M. Virius, Manabu Togawa, Y. L. Yamaguchi, Y. Nakamiya, D. Lynch, E. O'Brien, X. Jiang, C. H. Chen, D. Kawall, A. Yu. Semenov, J. Gosset, R. Lacey, D. Mukhopadhyay, M. Wysocki, M. I. Nagy, T. Niida, Gary Grim, P. Lichtenwalner, A. Sukhanov, K. Kurita, P. Liebing, D. Watanabe, S. Batsouli, Marcus Hohlmann, M. D. Malik, I. V. Sourikova, E. Vznuzdaev, H. Pereira, K. V. Dharmawardane, R. Granier de Cassagnac, R. P. Pisani, A. Adare, K. Tanida, S. Belikov, K. S. Joo, A. Lebedev, G. Baksay, Ralf Peter Averbeck, Dmitry Blau, Taku Gunji, H. Gong, Charles Maguire, K. N. Barish, Paul Constantin, R. Pak, C. M. Camacho, N. N. Ajitanand, R. S. Towell, E. J. Desmond, A. Ster, Prashant Shukla, M. Kawashima, H. Pei, I. Tserruya, S. Taneja, K. A. Drees, Zvi Hirsh Citron, K. Karatsu, T. Ichihara, Torsten Dahms, S. Bathe, Y. Fukao, Anne Marie Sickles, H. Themann, I. Garishvili, F. Wei, J. L. Nagle, F. Kajihara, A. Basye, M. Grosse Perdekamp, J. Newby, M. E. Connors, Gerd Joachim Kunde, I. Shein, J. Rak, J. Seele, R. Belmont, S. Yokkaichi, S. F. Pate, N. Apadula, J. Hanks, E. Vazquez-Zambrano, R. Petti, S. Esumi, D. Sharma, A. Rakotozafindrabe, Eun Joo Kim, O. Dietzsch, E. T. Atomssa, H. Valle, M. Ouchida, A. P.T. Palounek, Kensuke Homma, E. Richardson, Takahiro Nakamura, Susumu Oda, R. Ichimiya, Ke. Nakamura, A. Durum, J. Alexander, Takahiro Fusayasu, S. Butsyk, S. V. Afanasiev, L. Aphecetche, M. Kasai, Dipanwita Dutta, Minghui Liu, M. Heffner, S. Zhou, H. Al-Bataineh, Kenneth Francis Read, N. Means, J. Asai, Alexander Malakhov, Y. Tsuchimoto, V. Singh, J. B. Choi, Y. Iwanaga, H. Van Hecke, J. S. Bok, S. W. Nam, H. A. Gustafsson, G. S. Kyle, S. Chernichenko, Julia Velkovska, S. P. Sorensen, O. Chvala, Seong H. Kim, J. G. Lajoie, C. Silvestre, S. K. Park, Johannes Peter Wessels, S. D. Rolnick, S. Sano, Y. Ikeda, Tae-Yeon Lee, M. Rosati, A. V. Kazantsev, K. Yamaura, I. E. Yushmanov, Shingo Sakai, Alexei Khanzadeev, G. R. Young, C. Zhang, T. Hester, A. Kravitz, K. B. Lee, A. Hadj Henni, M. L. Brooks, I. Danchev, Marisilvia Donadelli, V. Bumazhnov, J. G. Boissevain, P. Ružička, Tamás Csörgő, Martin Purschke, E. P. Hartouni, C. A. Aidala, B. Bassalleck, M. Konno, E. Stenlund, S. Huang, K. Sedgwick, Alberto Baldisseri, L. Tomášek, V-N. Tram, Animesh Datta, N. Grau, Byung-Sik Hong, Hongfang Liu, D. E. Fields, V. Papavassiliou, A. Bazilevsky, D. Silvermyr, L. S. Zolin, W. J. Park, M. Chiu, Ajit Kumar Mohanty, A. Taranenko, Beomkyu Kim, Viktor Riabov, Christopher Rosen, T. A. Shibata, T. Sato, T. Murakami, E. M. Takagui, Kazushi Miki, T. Horaguchi, P. Mikeš, Ryugo S. Hayano, C. Y. Chi, M. Proissl, D. Winter, Wei Xie, A. Deshpande, I. J. Choi, B. Love, J. T. Mitchell, Agneta Oskarsson, Motoi Inaba, J. C. Hill, R. M. Wright, K. S. Sim, Aaron Angerami, D. Yu Peressounko, C. Baumann, A. G. Litvinenko, A. Glenn, D. Roach, Y. Riabov, T. C. Awes, Kyoichiro Ozawa, T. Liška, Kenta Shigaki, M. Nguyen, K. M. Kijima, M. McCumber, A. K. Purwar, S. Kametani, R. Tanabe, P. D. Barnes, A. Yanovich, D. M. Lee, D. Layton, R. A. Soltz, C. Pinkenburg, M. Stepanov, Y. Berdnikov, Y. Akiba, Z. Fraenkel, M. Mishra, S. Nagamiya, Jun Kikuchi, R. Seidl, Vladislav Manko, G. Roche, D. Isenhower, R. Yang, Xingguo Li, L. Mašek, W. A. Zajc, S. Sawada, Eunja Kim, A. A. Vinogradov, A. S. Nyanin, J. Ying, A. Franz, Yu. Efremenko, C. P. Singh, Vaclav Vrba, Klaus Johannes Reygers, Astrid Morreale, T. V. Moukhanova, Rachid Nouicer, S. N. White, V. Baublis, A. Denisov, Rui Wei, K. Kiriluk, A. Kozlov, R. Seto, K. Haruna, M. Naglis, Y. Tanaka, R. K. Choudhury, Jiangyong Jia, B. M. Johnson, S. Tarafdar, Deepa Thomas, J. H. Kang, C. L. Silva, D. H. Kim, J. S. Haggerty, K. Imai, V. Cianciolo, E. Mannel, Y. Goto, Jen-Chieh Peng, Y. Tomita, J. L. Charvet, A. Kiss, C. Vale, B. S. Chang, W. C. Chang, B. Komkov, Sergey Fokin, A. Isupov, Eva Haslum, B. Fadem, V. Dzhordzhadze, Henner Buesching, Steve Edwards, X. He, J. Sziklai, H. J. Moon, Norio Saito, Tsutomu Mibe, J. L. Klay, K. Das, F. Staley, L. Baksay, M. A. L. Leite, Inkyu Park, A. Enokizono, K. Nakano, Barbara Jacak, Y. Aramaki, V. Peresedov, Masayasu Ishihara, J. M. Durham, Robert Vertesi, P. Chung, Xiong Wang, Z. Conesa del Valle, Brian Cole, Dong Jo Kim, D. Kleinjan, Rushan Han, J. Imrek, W. E. Sondheim, Y. S. Lai, D. Ivanischev, L. A. Linden Levy, J. Koster, M. Kurosawa, J. S. Kapustinsky, V. Babintsev, K. Boyle, P. A. Rukoyatkin, D. Hornback, A. Veicht, H. Masui, B. Meredith, A. A. Bickley, Christophe Pierre Suire, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, H. A. Torii, Toru Sugitate, E. R. Kinney, D. P. Morrison, S. Campbell, V. E. Semenov, Tatsuya Chujo, François Fleuret, J. Jin, Y. Watanabe, I. Younus, J. Murata, A. Soldatov, V. S. Pantuev, J. Hamblen, K. Okada, B. Sahlmueller, H. En'yo, M. J. Leitch, M. J. Kweon, Alberica Toia, Jihyun Bhom, Y. J. Kwon, K. Sakashita, Jason Kamin, K. Watanabe, Christian Klein-Boesing, K. Shoji, Anand Kumar Dubey, S. P. Stoll, Yongsun Kim, P. W. Stankus, S. S.E. Rosendahl, G. Bunce, J.-G. Park, Maya Hachiya Shimomura, Y. I. Makdisi, A. Churyn, H. Qu, D. Jouan, Hideki Hamagaki, K. Aoki, G. David, K. I. Hahn, M. J. Tannenbaum, Tim Jones, N. Kamihara, Peter Christiansen, T. Kempel, S. Rembeczki, Aram Kim, F. Matathias, Alice Mignerey, L. D'Orazio, Takao Sakaguchi, C. Oakley, A. Drees, A. D. Frawley, W. Holzmann, C. A. Ogilvie, T. K. Hemmick, Bhawani Singh, Yasuo Miake, L. Kochenda, M. Issah, Don McGlinchey, and P. Tarján
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Muon ,Electron ,Flavor - Published
- 2014
40. Λ flow and Λ-P correlation in Au + Au collisions at AGS energies
- Author
-
C. Law, A. S. Hirsch, J. Whitfield, F. P. Brady, G. Odyniec, N. N. Ajitanand, J. E. Draper, K.M. Crowe, Lei Huo, W. N. Zhang, J. Lauret, N T B Stone, James Alexander, M. L. Gilkes, L. Wood, H. G. Ritter, Brian Cole, Matthew J. Anderson, J L Chance, M. Heffner, R. P. Scharenberg, A. C. Das, Y. M. Liu, H. Liu, Morton Kaplan, S. Y. Panitkin, Roy A. Lacey, C. Pinkenburg, S Gushue, T. J. M. Symons, E. L. Hjort, M. A. Lisa, M. Justice, D. Cebra, D. L. Olson, W. Caskey, Z. Milosevich, J. C. Kintner, R. Witt, L. S. Schroeder, B. K. Srivastava, D. Keane, P. Chung, G. Rai, T. Case, J. Klay, D. Best, J. L. Romero, David Krofcheck, N. T. Porile, and R. L. McGrath
- Subjects
Quark ,Physics ,Nuclear and High Energy Physics ,Scattering ,Nuclear Theory ,Hyperon ,Magnitude (mathematics) ,Nuclear physics ,Flow ratio ,Transverse plane ,Flow (mathematics) ,Atomic physics ,Nuclear Experiment ,Beam (structure) - Abstract
Transverse and radial flow measurements are presented for Λ hyperons along with Λ-P correlations from Au + Au collisions at AGS energies. The flow measurements are compared with those of co-produced protons. The measurements indicate that Λ hyperons flow consistently in the same direction as protons but with a smaller magnitude for all beam energies. Comparisons with RQMD calculations show that the experimentally determined Λ sideward flow is consistently larger compared with the calculated value obtained from scattering processes only. The experimental transverse flow ratio Λ/P is consistent with predictions ( 2/3) of the quark counting rule at 2 A GeV but is found to decrease with increasing beam energy. These observations may be related to the detailed features of the Λ-nucleon potential for the nuclear densities produced. At 6 A GeV, Λp correlation functions are observed to be essentially flat (within statistical uncertainty), indicating little or no correlation between Λs and co-produced protons. This suggests that Λs may have a spacetime emission pattern which is different from that for protons. Further evidence from radial flow measurements also indicates that 6 A GeV Λ hyperons (at mid-rapidity) do not share the same emitting source characteristics as co-produced protons.
- Published
- 2001
41. Azimuthal anisotropy ofπ0andηmesons in Au + Au collisions atsNN=200GeV
- Author
-
B. Komkov, Norio Saito, M. A. L. Leite, R. Belmont, J. S. Kapustinsky, V. Babintsev, I. Tserruya, Yu. Efremenko, G. S. Kyle, James Alexander, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, C. M. Camacho, Philippe Rosnet, Alexandre Lebedev, D. M. Lee, S. Dairaku, K. Kiriluk, A. Yu. Semenov, E. H. Kim, Maya Hachiya Shimomura, R. A. Soltz, C. Silvestre, V. Singh, Prashant Shukla, K. B. Lee, S. F. Pate, B. Azmoun, A. Král, Y. I. Makdisi, S. Afanasiev, R. S. Towell, K. A. Drees, S. N. White, D. Kawall, M. Grosse Perdekamp, M. E. Connors, M. Virius, Marisilvia Donadelli, V. Bumazhnov, H. Al-Bataineh, J. Newby, M. J. Tannenbaum, H. Themann, I. Garishvili, F. Wei, M. Chiu, Sung Keun Park, M. Oka, N. N. Ajitanand, H. Torii, R. Tanabe, A. K. Purwar, K. Fujiwara, K. N. Barish, Eunja Kim, C. A. Ogilvie, Kisung Lee, T. K. Hemmick, Zvi Hirsh Citron, A. Dion, J. M. Durham, Yasuo Miake, V. S. Pantuev, Kyeongpil Lee, J. Ide, Alexei Khanzadeev, C. H. Chen, Takahiro Nakamura, K. Nakano, M. Ouchida, L. Kochenda, M. Issah, K. Tanida, J. P. Wood, K. Das, D. Roach, K. M. Kijima, S. Yokkaichi, W. E. Sondheim, D. Ivanischev, A. Enokizono, P. Liebing, N. Means, Alice Mignerey, D. Hornback, Susumu Oda, Alexander Milov, I. Nakagawa, R. Luechtenborg, Y. L. Yamaguchi, E. P. Hartouni, E. Stenlund, C. Y. Chi, A. Glenn, T. Engelmore, V. Papavassiliou, K. Boyle, I. Ravinovich, P. A. Rukoyatkin, Martin Purschke, C. A. Aidala, J. Hamblen, A. Durum, J. Murata, O. Drapier, Frank Ellinghaus, Peter Christiansen, K. Watanabe, T. Ichihara, D. Winter, D. Yu Peressounko, E. R. Kinney, Takao Sakaguchi, S. Sano, D. P. Morrison, K. Shoji, C. Baumann, S. Kametani, S. Campbell, A. Taranenko, P. Tarján, A. D. Frawley, K. Yamaura, R. Pak, Y. J. Mao, C. P. Singh, E. Leitner, Kazushi Miki, Takahiro Fusayasu, B. M. Johnson, M. Bai, S. Huang, Rushan Han, Tatsuya Chujo, N. Kamihara, A. Morreale, Xingguo Li, Brajesh K. Singh, Alexander Malakhov, T. Horaguchi, Jen-Chieh Peng, A. Isupov, J. H. Kang, J. S. Haggerty, C. L. Woody, A. Berdnikov, D. Silvermyr, P. W. Stankus, K. Okada, Hongfang Liu, D. E. Fields, W. Holzmann, Z. Fraenkel, B. V. Jacak, Vladimir Samsonov, J. Sziklai, Gerd Joachim Kunde, L. S. Zolin, T. V. Moukhanova, H. W. Van Hecke, A. Drees, Brian Cole, Inkyu Park, Xiong Wang, R. K. Choudhury, M. L. Brooks, W. J. Park, Christopher Rosen, H. En'yo, Senta Greene, P. Chung, K. S. Joo, M. Kurosawa, Dong Jo Kim, S. P. Sorensen, I. Shein, S. Tarafdar, M. J. Leitch, A. T. Basye, S. Sawada, M. McCumber, K. Sakashita, E. J. Desmond, A. Yanovich, J. Ying, A. Veicht, B. Love, M. Togawa, E. Vazquez-Zambrano, Tamas Ferenc Csorgo, A. Franz, Zhiying You, B. Fadem, E. O'Brien, O. Chvala, A. Kiss, J. Park, Eva Haslum, B. Lenzi, R. Bennett, M. Kawashima, A. Rakotozafindrabe, I. V. Sourikova, B. Meredith, Henner Buesching, J. L. Nagle, Steve Edwards, K. Sedgwick, Jason Kamin, Seong H. Kim, S. Esumi, D. Sharma, A. V. Kazantsev, M. Finger, Y. Tsuchimoto, S. P. Stoll, T. L. Thomas, Y. S. Lai, John Hill, Y. Ikeda, J. Jin, R. Ichimiya, A. Deshpande, A. Datta, Jongmin Lee, E. M. Takagui, J. G. Lajoie, J. Hanks, Y. J. Kwon, Ryugo S. Hayano, H. Qu, A. G. Litvinenko, I. E. Yushmanov, S. S.E. Rosendahl, G. Bunce, Toru Sugitate, L. Tomášek, R. Vértesi, P. Mikeš, Marcus Hohlmann, Y. Riabov, D. Lynch, Ajit Kumar Mohanty, Kenta Shigaki, Hideki Hamagaki, K. Aoki, D. Jouan, T. A. Shibata, T. Sato, C. Pinkenburg, M. Nguyen, François Fleuret, I. J. Choi, A. Kravitz, G. David, K. I. Hahn, A. Taketani, A. S. Nyanin, D. S. Jumper, A. Kozlov, J. E. Frantz, Y. Watanabe, M. Gonin, D. Kotchetkov, Rachid Nouicer, M. Proissl, T. Dahms, L. A. Linden Levy, R. Seto, T. C. Awes, Kyoichiro Ozawa, T. Liška, G. Roche, I. Younus, J. S. Bok, D. Isenhower, A. Toia, T. Kempel, I. Danchev, Taku Gunji, H. Gong, J. Seele, X. He, Dong-Hun Kim, M. Naglis, F. Kajihara, C. L. Silva, Y. Aramaki, V. Peresedov, A. Sukhanov, K. Kurita, H. Pereira, Masayasu Ishihara, S. Butsyk, S. Bathe, Agneta Oskarsson, S. Zhou, J. Koster, M. Wysocki, S. D. Rolnick, Y. Morino, H. Masui, A. A. Bickley, Minghui Liu, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, M. Heffner, Kenneth Francis Read, Tadaaki Isobe, P. L. McGaughey, Y. Fukao, Y. Nakamiya, T. Hester, G. Baksay, B. Sahlmueller, Y. J. Kim, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, N. A. Sparks, B. Bassalleck, M. Konno, J. T. Mitchell, R. Seidl, Vladislav Manko, M. Slunečka, S. Belikov, N. Grau, C. Vale, M. I. Nagy, Motoi Inaba, R. M. Wright, Mate Csanad, D. Watanabe, R. P. Pisani, M. D. Malik, E. Vznuzdaev, Charles Maguire, Y. Onuki, E. Kistenev, H. Pei, Jan Rak, R. Lacey, Johannes Peter Wessels, R. Granier de Cassagnac, W. A. Zajc, A. Adare, V. Baublis, A. Denisov, V. Cianciolo, Sergey Fokin, Beomkyu Kim, H. A. Gustafsson, Wei Xie, Y. Tanaka, E. Mannel, K. Karatsu, C. Zhang, L. Baksay, P. Ružička, Anne Marie Sickles, Viktor Riabov, G. R. Young, K. S. Sim, R. Yang, K. Imai, M. Rosati, A. A. Vinogradov, Jiangyong Jia, Y. Goto, O. Dietzsch, E. T. Atomssa, H. Valle, Dipanwita Dutta, and Julia Velkovska
- Subjects
Physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,Meson ,010308 nuclear & particles physics ,Elliptic flow ,01 natural sciences ,Nuclear physics ,Azimuth ,Viscosity ,0103 physical sciences ,Transverse momentum ,High Energy Physics::Experiment ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider ,Anisotropy - Abstract
The azimuthal anisotropy coefficients v2 and v4 of p 0 and. mesons are measured in Au + Au collisions at root s(NN) = 200 GeV as a function of transverse momentum p(T) (1-14 GeV/c) and centrality. The extracted v(2) coefficients are found to be consistent between the two meson species over the measured p(T) range. The ratio of v(4)/v(2)(2) for pi(0) mesons is found to be independent of p(T) for 1- 9 GeV/c, implying a lack of sensitivity of the ratio to the change of underlying physics with p(T). Furthermore, the ratio of v(4)/v(2)(2) is systematically larger in central collisions, which may reflect the combined effects of fluctuations in the initial collision geometry and finite viscosity in the evolving medium.
- Published
- 2013
42. The STAR Time Projection Chamber
- Author
-
K.H. Ackermann, N. Adams, C. Adler, M. Aluyshin, M.A. Ananeva, M. Anderson, G. Averichev, A. Bacher, J. Balewski, O. Balrannikova, J. Baudot, S. Bekele, R. Bellwied, S. Bennett, J. Berger, W. Betts, H. Bichsel, F. Bieser, L. Bland, C. Blyth, A. Bogdanov, B.E. Bonner, R. Bossingham, A. Boucham, S. Bouvier, F.P. Brady, E. Braithwaite, W. Braithwaite, R.L. Brown, V. Budilov, C. Byrd, H. Caines, N. Carlin, J. Carroll, D. Cebra, M.-L. Chen, W. Chen, Y. Chen, S. Chernenko, M. Cherney, A. Chikanian, J.T.M. Chrin, W. Christie, J.-P. Coffin, L. Conin, T.M. Cormier, J. Cramer, H.J. Crawford, A. Das, W. Deng, A.A. Derevschikov, L. Didenko, W. Dominik, J.E. Draper, V. Dunin, J. Dunlop, H. Dyke, W.R. Edwards, V. Eckardt, A.V. Efremov, V. Emelianov, J. Engelage, G. Eppley, B. Erazmus, A. Etkin, P. Fachini, V. Faine, M.I. Ferguson, H. Fessler, E. Finch, Y. Fisyak, D. Flierl, K.J. Foley, D. Fritz, N. Gagunashvili, M. Germain, V. Ghazikhanian, M. Gilkes, S. Giliberto, J. Grabski, O. Grachov, D. Greiner, L.C. Greiner, V. Grigoriev, E. Gushin, H. Gutbrod, T.J. Hallman, D. Hardtke, J.W. Harris, M. Heffner, S. Heppelmann, A. Hirsch, E. Hjort, G.W. Hoffmann, M. Horsley, H. Huang, T. Humanic, H. Huemmler, T. Huyck, G.J. Igo, Yu.I. Ivanshin, P. Jacobs, W. Jacobs, S. Jacobson, R. Jared, P. Jones, E.G. Judd, F. Jundt, M. Kaplan, V. Kaplin, D. Keane, V. Khodyrev, J. Klay, S. Klein, L. Kolobashkina, A. Konstantinov, L. Kotchenda, I. Kotov, M. Kramer, P. Kravtsov, C. Kuhn, G.J. Kunde, R. Kutuev, M. Lamont, J.S. Lange, B. Lasiuk, F. Laue, A. Lebedev, Z. Lee, T. LeCompte, B. Leonhardt, V. Leontiev, null Leszczynski, M.J. LeVine, Q. Li, Z. Li, C.J. Liaw, J. Lin, S.J. Lindenbaum, H. Liu, M. Lisa, A. Ljubicic, W. Llope, G. LoCurto, H. Long, R.S. Longacre, W.A. Love, J.R. Lutz, D. Lynn, L. Madansky, R. Majka, T.M. Makarenko, A. Maliszewski, S. Margetis, K. Marks, L. Martin, J. Marx, H.S. Matis, Yu. Matulenko, T.S. McShane, A. Meshanin, Yu. Melnik, A. Michalon, B. Miller, Z. Milosevich, N. Minaev, R.M. Minor, J. Mitchell, V.A. Moiseenko, D. Moltz, C.F. Moore, M.G. Munhoz, G.S. Mutchler, J.M. Nelson, P. Nevski, V. Nikitin, B. Nilsen, L. Nogach, S. Nurushev, J. Nystrand, G. Odyniec, A. Ogawa, C.A. Ogilvie, V. Okorokov, D. Olson, A. Oltchak, G. Ott, G. Paic, S. Pandey, Y. Panebratsev, S.Y. Panitkin, A. Pavlinov, T. Pawlak, W. Peryt, V. Perevoztchikov, V.A. Petrov, Yu. Petukhov, W. Pinganaud, E. Platner, J. Pluta, N. Porile, J. Porter, A.M. Poskanzer, M. Przewlocki, D. Prindle, E. Potrebenikova, C. Pruneau, G. Rai, O. Ravel, R.L. Ray, D. Razin, S. Razin, J. Reid, F. Retiere, A. Ridiger, J. Riso, H.-G. Ritter, J.B. Roberts, D. Roehrich, O. Rogachevskiy, A. Rollefson, J.L. Romero, C. Roy, M. Runco, D.E. Russ, V. Rykov, I. Sakrejda, P. Saltz, J. Sandweiss, A.C. Saulys, I. Savin, J.J. Schambach, R.P. Scharenberg, N. Schmitz, L.S. Schroeder, A. Schuettauf, M. Schulz, J. Seger, D. Seliverstov, J. Seyboth, P. Seyboth, A. Shalnov, K. Shestermanov, Y. Shi, V.S. Shvetsov, I.N. Silin, N. Smirnoff, R. Snellings, L. Soloviev, J. Sowinski, H.M. Spinka, B. Srivastava, E. Stephenson, R. Stock, M. Strikhanov, B. Stringfellow, H. Stroebele, C. Struck, E. Sugarbaker, C. Suire, A. Sustich, T.J. Symons, E.M. Szanto, A. Szanto de Toledo, J. Takahashi, A. Tang, D. Thein, J.H. Thomas, V. Tikhomirov, V. Tikhonov, M.B. Tonjes, T. Trainor, S. Trentalange, M. Tokarev, V. Trofimov, O. Tsai, C. Tull, K. Turner, T. Ullrich, D.G. Underwood, G. VanBuren, A.M. VanderMolen, A. Vanyashin, A. Vasiliev, I.M. Vasilevski, S. Vigdor, S. Voloshin, C.Q. Vu, F. Wang, H.J. Ward, D. Weerasundra, R. Wells, T. Wenaus, G.D. Westfall, J.P. Whitfield, C. Whitten, H. Wieman, R. Willson, S. Wissink, R. Witt, L. Wood, N. Xu, Z. Xu, A. Yakutin, E. Yamamoto, J. Yang, P. Yepes, A. Yokosawa, V. Yurevich, J. Zhang, W.M. Zhang, N. Zhidkov, D. Zimmerman, R. Zoulkarneev, A. Zubarev, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), 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), and STAR
- Subjects
Physics ,Nuclear and High Energy Physics ,Time projection chamber ,Physics::Instrumentation and Detectors ,business.industry ,010308 nuclear & particles physics ,Track (disk drive) ,Resolution (electron density) ,Observable ,Star (graph theory) ,Engineering physics ,01 natural sciences ,Particle identification ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,Stars ,0302 clinical medicine ,Optics ,[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,0103 physical sciences ,Data analysis ,Nuclear Experiment ,business ,010306 general physics - Abstract
The STAR Time Projection Chamber was successfully operated during the first RHIC run in 2000. Most of the STAR contributions reported in these proceedings are based on the analysis of data from the TPC. In this article, we show that the performance achieved by the TPC, in terms of track reconstruction, position resolution, and particle identification are well suited for measuring precise and reliable physics observables.
- Published
- 1999
43. Results from the experiment E895 at the BNL AGS
- Author
-
N. T. Porile, M. A. Lisa, P. Chung, J. L. Romero, S. Y. Panitkin, D. Keane, N T B Stone, Y. M. Liu, G. Rai, Yufeng Zhang, S. Gushue, K. Crowe, R. P. Scharenberg, N.N. Ajitanand, T. Case, J. Klay, Brian Cole, G. Odyniec, D. Best, D. L. Olson, R. L. McGrath, T. Wienold, Morton Kaplan, J. L. Chance, R. Lacey, David Krofcheck, M. Heffner, D. Cebra, J. C. Kintner, C. Pinkenburg, J. Whitfield, L. Wood, W. Caskey, Z. Milosevich, James Alexander, T. J. M. Symons, E. L. Hjort, X. Yang, L. S. Schroeder, Andrew S. Hirsch, M. Anderson, R. Witt, M. Justice, W. N. Zhang, M.L. Gilkes, Hans Georg Ritter, S. Wang, F. P. Brady, B. K. Srivastava, L. Huo, R. Wells, A. C. Das, H. Liu, and J. E. Draper
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Time projection chamber ,Physics::Instrumentation and Detectors ,Detector ,Observable ,Context (language use) ,Particle identification ,Nuclear physics ,Nuclear Experiment ,Event (particle physics) ,Beam (structure) ,Excitation - Abstract
We present some of the latest results from the E895 experiment conducted at the BNL AGS accelerator. Au+Au collisions were recorded by the EOS Time Projection Chamber (TPC) at beam energies of 2, 4, 6, and 8 A GeV. The TPC detector permitted the reconstruction of individual collision events with almost 4π acceptance and good particle identification. This capability allowed E895 to study global observables and two particle correlations with respect to symmetries of the event. Flow excitation functions are examined and discussed in the context of the Nuclear Equation of State.
- Published
- 1999
44. Collective flow in Au+Au collisions between 2–8 A GeV at AGS
- Author
-
G. Odyniec, R. Scharenberg, J. Chance, D. Krofcheck, T. Case, P. Chung, B. Srivastava, J. Draper, L. Wood, D.A. Cebra, T. Wienold, H. Liu, A. Das, L. Huo, D. Best, J. Kintner, N.T.B. Stone, N.N. Ajitanand, M. Kaplan, D. Keane, L. Schroeder, J. Romero, H.G. Ritter, C. Pinkenburg, M. Gilkes, T.J.M. Symons, M. Heffner, Z. Milosevich, A.S. Hirsch, J. Alexander, R. Lacey, S. Wang, W.N. Zhang, D. Olson, N. Porile, Y. Zhang, K. Crowe, M. Justice, Y. M. Liu, R. McGrath, E. Hjort, W. Caskey, X. Yang, S. Y. Panitkin, J. Whitfield, M. Lisa, S. Gushue, B. Cole, F.P. Brady, and G. Rai
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Mean field theory ,Flow (mathematics) ,Transverse momentum ,Observable ,Function (mathematics) ,Statistical physics ,Nuclear Experiment ,Beam energy - Abstract
The E895 collaboration has undertaken a systematic and exclusive study of Au+Au collisions between 2–8 A GeV. We present preliminary results on collective flow observables as a function of beam energy. Data are compared with theoretical predictions.
- Published
- 1998
45. Spectra and ratios of identified particles in Au+Au andd+Au collisions atsNN=200GeV
- Author
-
N. Apadula, B. Azmoun, A. Král, M. Oka, P. Liebing, S. Esumi, D. Sharma, R. Ichimiya, P. Tarján, Y. J. Mao, Martin Purschke, C. A. Aidala, Y. Fukao, I. Tserruya, A. K. Purwar, K. Fujiwara, Charles Maguire, Maya Hachiya Shimomura, A. Morreale, D. Kawall, C. Silvestre, K. Karatsu, Z. Fraenkel, Gary Grim, Yu. Efremenko, R. K. Choudhury, Jongmin Lee, Y. L. Yamaguchi, K. V. Dharmawardane, Anne Marie Sickles, J. H. Kang, Y. I. Makdisi, V. Singh, H. Themann, J. S. Haggerty, T. Hester, V. S. Pantuev, D. Lynch, E. Leitner, A. Taketani, G. S. Kyle, James Alexander, Marisilvia Donadelli, V. Bumazhnov, O. Dietzsch, M. I. Nagy, D. Watanabe, M. D. Malik, E. Vznuzdaev, N. A. Sparks, R. S. Towell, I. Garishvili, F. Wei, K. N. Barish, S. Nam, D. S. Jumper, R. Tanabe, E. T. Atomssa, H. Valle, M. K. Dayananda, M. Wysocki, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, M. J. Tannenbaum, S. Sano, T. Sato, Dipanwita Dutta, A. Glenn, G. R. Young, H. W. Van Hecke, H. Torii, T. Dahms, E. Kistenev, P. Lichtenwalner, H. Qu, A. Kim, Hideki Hamagaki, K. Aoki, Y. S. Lai, R. Pak, N. Kamihara, N. Grau, J. Murata, Eunja Kim, Julia Velkovska, A. Yu. Semenov, S. Dairaku, S. Rembeczki, K. A. Drees, S. N. White, Deepa Thomas, Zvi Hirsh Citron, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, G. David, A. Kiss, Kyeongpil Lee, S. P. Sorensen, M. Rosati, R. Vértesi, Hongfang Liu, D. E. Fields, B. V. Jacak, Senta Greene, A. T. Basye, K. Nakano, J. Hamblen, Aaron Angerami, Tadaaki Isobe, J. P. Wood, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, Beomkyu Kim, K. Boyle, J. Ide, Henner Buesching, Gerd Joachim Kunde, Wei Xie, M. Ouchida, N. Means, Steve Edwards, M. Virius, K. Okada, Rushan Han, Motoi Inaba, M. McCumber, W. A. Zajc, O. Drapier, Frank Ellinghaus, B. Fadem, E. O'Brien, I. Shein, R. M. Wright, Y. Tanaka, W. E. Sondheim, D. Ivanischev, Mate Csanad, C. M. Camacho, Prashant Shukla, S. F. Pate, Philippe Rosnet, Alice Mignerey, K. S. Sim, E. R. Kinney, D. P. Morrison, M. L. Brooks, K. Watanabe, V. Baublis, A. Denisov, L. D'Orazio, H. En'yo, E. Mannel, S. Yokkaichi, A. A. Vinogradov, Ke. Nakamura, S. Campbell, Vladimir Samsonov, V. Cianciolo, M. J. Leitch, P. A. Rukoyatkin, T. Ichihara, R. A. Soltz, C. H. Chen, C. Oakley, A. Drees, K. Shoji, H. Al-Bataineh, O. Chvala, J. Hanks, Alexandre Lebedev, Sergey Fokin, M. Nihashi, Marcus Hohlmann, B. Love, Takahiro Fusayasu, Tatsuya Chujo, Jiangyong Jia, Y. Goto, H. J. Moon, L. Baksay, T. Horaguchi, P. L. McGaughey, P. W. Stankus, T. L. Thomas, Y. Ikeda, D. Isenhower, Jen-Chieh Peng, Sung Keun Park, D. M. Lee, I. Ravinovich, K. Das, M. Grosse Perdekamp, Seong H. Kim, Alexander Malakhov, C. Y. Chi, A. Toia, N. N. Ajitanand, L. A. Linden Levy, K. Sakashita, Takao Sakaguchi, E. P. Hartouni, H. Pei, J. E. Frantz, Tamas Ferenc Csorgo, M. E. Connors, Y. J. Kwon, Ryugo S. Hayano, K. Sedgwick, M. Bai, R. P. Pisani, J. G. Lajoie, Inkyu Park, D. Kleinjan, J. L. Nagle, Xiong Wang, V. Papavassiliou, K. Kiriluk, Z. Conesa del Valle, H. A. Gustafsson, Takahiro Nakamura, A. D. Frawley, Y. Riabov, D. Silvermyr, Kenta Shigaki, Alexei Khanzadeev, Dong Jo Kim, C. Pinkenburg, S. Bathe, T. Murakami, D. McGlinchey, C. Baumann, A. G. Litvinenko, M. Nguyen, R. Yang, I. J. Choi, A. Kravitz, E. H. Kim, Agneta Oskarsson, C. Zhang, Susumu Oda, A. Deshpande, Jason Kamin, E. Stenlund, A. Dion, K. B. Lee, S. Kametani, L. S. Zolin, Taku Gunji, H. Gong, J. Seele, X. Jiang, A. Veicht, G. Roche, S. Huang, J. B. Choi, S. P. Stoll, A. S. Nyanin, W. J. Park, T. Kempel, F. Kajihara, P. Ružička, Y. Berdnikov, Y. Akiba, A. Durum, C. P. Singh, Zhiying You, K. Tanida, Rachid Nouicer, D. Kotchetkov, M. Proissl, Johannes Peter Wessels, R. Bennett, Christopher Rosen, A. V. Kazantsev, Dong-Hun Kim, S. Taneja, M. Mishra, W. Holzmann, M. Kawashima, S. Nagamiya, S. S.E. Rosendahl, T. Jones, Peter Christiansen, B. M. Johnson, G. Bunce, Viktor Riabov, K. Yamaura, M. Finger, A. Kozlov, D. Winter, R. Seto, A. Yanovich, C. L. Woody, A. Berdnikov, Vaclav Vrba, Klaus Johannes Reygers, D. Yu Peressounko, J. H. Bhom, R. J. Petti, K. Imai, S. Butsyk, Rui Wei, L. Tomášek, D. Jouan, A. Isupov, T. V. Moukhanova, D. Roach, P. Mikeš, S. Zhou, I. Danchev, S. Sawada, Dmitry Blau, Y. Onuki, X. He, K. M. Kijima, J. Sziklai, S. D. Rolnick, J. Ying, Jan Rak, A. Franz, M. Chiu, E. J. Desmond, B. Meredith, Y. Aramaki, V. Peresedov, R. Lacey, C. A. Ogilvie, M. Togawa, Kisung Lee, T. K. Hemmick, E. Vazquez-Zambrano, J. Park, T. C. Awes, R. Granier de Cassagnac, Kyoichiro Ozawa, T. Liška, J. M. Durham, Yasuo Miake, J. S. Bok, A. Rakotozafindrabe, Brian Cole, J. Koster, A. Adare, A. Caringi, Jun Kikuchi, M. Kurosawa, Y. Watanabe, M. Kasai, Y. Tsuchimoto, Y. Iwanaga, B. Komkov, John Hill, Xingguo Li, L. Kochenda, M. Issah, I. E. Yushmanov, H. Masui, Toru Sugitate, A. Enokizono, P. Chung, Norio Saito, I. Younus, Tsutomu Mibe, M. Gonin, Minghui Liu, A. A. Bickley, M. Heffner, Kenneth Francis Read, M. A. L. Leite, A. Datta, I. V. Sourikova, François Fleuret, A. Sukhanov, K. Kurita, H. Pereira, R. Belmont, J. S. Kapustinsky, V. Babintsev, Y. Morino, J. Jin, E. M. Takagui, M. Naglis, Masayasu Ishihara, F. Matathias, Kensuke Homma, E. Richardson, P. Constantin, K. I. Hahn, B. Bassalleck, M. Konno, Y. Nakamiya, G. Baksay, B. Sahlmueller, Y. J. Kim, J. T. Mitchell, R. Seidl, S. Tarafdar, Vladislav Manko, M. Slunečka, S. Belikov, Eva Haslum, B. Lenzi, C. Vale, S. Afanasiev, J. Newby, D. Hornback, A. Taranenko, Kazushi Miki, Brajesh K. Singh, and K. S. Joo
- Subjects
Physics ,Nuclear and High Energy Physics ,Nuclear Theory ,Hadron ,Spectral line ,Nuclear physics ,Pion ,Deuterium ,Transverse momentum ,High Energy Physics::Experiment ,Atomic physics ,Nuclear Experiment ,Relativistic Heavy Ion Collider ,Nucleon ,Bar (unit) - Abstract
The transverse momentum (p(T)) spectra and ratios of identified charged hadrons (pi(+/-), K-+/-, p, (p) over bar) produced in root s(NN) = 200 GeV Au + Au and d + Au collisions are reported in five different centrality classes for each collision species. The measurements of pions and protons are reported up to p(T) = 6 GeV/c (5 GeV/c), and the measurements of kaons are reported up to p(T) = 4 GeV/c (3.5 GeV/c) in Au + Au (d + Au) collisions. In the intermediate p(T) region, between 2 and 5 GeV/c, a significant enhancement of baryon-to-meson ratios compared to those measured in p + p collisions is observed. This enhancement is present in both Au + Au and d + Au collisions and increases as the collisions become more central. We compare a class of peripheral Au + Au collisions with a class of central d + Au collisions which have a comparable number of participating nucleons and binary nucleon-nucleon collisions. The p(T)-dependent particle ratios for these classes display a remarkable similarity, which is then discussed.
- Published
- 2013
46. Inclusive cross section and single transverse spin asymmetry for very forward neutron production in polarizedp+pcollisions ats=200 GeV
- Author
-
P. Tarján, Ryugo S. Hayano, M. Rosati, Maya Hachiya Shimomura, Vladimir Samsonov, Y. I. Makdisi, Y. Riabov, Kenta Shigaki, M. Nguyen, A. Yu. Semenov, J. Gosset, A. A. Vinogradov, A. S. Nyanin, Rachid Nouicer, Jiangyong Jia, Y. Goto, M. J. Tannenbaum, K. S. Sim, H. Torii, V. Dzhordzhadze, C. L. Woody, A. Berdnikov, S. Afanasiev, Y. Kwon, D. Mukhopadhyay, S. Rembeczki, A. Ster, Senta Greene, R. Yang, Tamas Ferenc Csorgo, S. Yokkaichi, A. T. Basye, M. I. Nagy, M. Issah, I. V. Sourikova, B. Meredith, Takafumi Niida, John Hill, B. Fadem, E. O'Brien, J. L. Nagle, M. Ouchida, N. Means, K. Imai, J. Asai, J. Newby, Shingo Sakai, M. Wysocki, A. A. Bickley, M. D. Malik, E. Vznuzdaev, Toru Sugitate, Y. Fukao, Minghui Liu, H. Pei, O. Dietzsch, H. Iinuma, Y. J. Mao, T. Horaguchi, Takao Sakaguchi, R. A. Soltz, H. Borel, E. T. Atomssa, H. Valle, J. H. Kang, K. B. Lee, C. Klein-Boesing, M. Heffner, Kenneth Francis Read, A. D. Frawley, Dipanwita Dutta, T. Hester, François Fleuret, J. S. Haggerty, D. Hornback, A. P.T. Palounek, R. Pak, S. Bathe, Julia Velkovska, T. Ichihara, S. Huang, M. Grosse Perdekamp, Anne Marie Sickles, N. Kamihara, W. Holzmann, Marisilvia Donadelli, V. Bumazhnov, Takahiro Fusayasu, A. Adare, A. Taranenko, Kazushi Miki, Alexander Malakhov, Y. Nakamiya, A. Hadj Henni, G. R. Young, S. Sawada, D. Silvermyr, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, K. A. Drees, Brajesh K. Singh, V-N. Tram, N. Grau, Taku Gunji, H. Gong, J. Seele, A. Drees, Vaclav Vrba, H. A. Gustafsson, Klaus Johannes Reygers, L. S. Zolin, R. Tanabe, D. Layton, W. J. Park, D. Winter, D. Yu Peressounko, Y. Onuki, F. Kajihara, J. Ying, A. Franz, Jan Rak, R. Lacey, C. Zhang, P. D. Barnes, A. Yanovich, G. Baksay, Y. Tanaka, W. C. Chang, K. Sakashita, Motoi Inaba, Beomkyu Kim, E. Mannel, Y. S. Lai, K. O. Eyser, A. K. Purwar, K. Fujiwara, R. Granier de Cassagnac, R. Vértesi, N. N. Ajitanand, Wei Xie, D. Roach, Mate Csanad, C. M. Camacho, Prashant Shukla, S. Butsyk, P. Ružička, S. F. Pate, Y. Ikeda, H. Al-Bataineh, Jason Kamin, S. N. White, K. M. Kijima, J. G. Boissevain, Tadaaki Isobe, S. P. Stoll, Rushan Han, X. He, S. Zhou, A. Baldisseri, S. D. Rolnick, L. Baksay, Viktor Riabov, Zvi Hirsh Citron, V. Peresedov, K. Nakano, Eva Haslum, B. Lenzi, K. N. Barish, W. E. Sondheim, S. S.E. Rosendahl, B. Sahlmueller, P. L. McGaughey, G. Bunce, D. Ivanischev, V. Papavassiliou, J. L. Charvet, Charles Maguire, C. Pinkenburg, K. Das, David D'Enterria, K. Boyle, P. A. Rukoyatkin, H. W. Van Hecke, J. T. Mitchell, M. Chiu, A. Churyn, E. P. Hartouni, D. Jouan, Kiyoshi Tanida, M. Stepanov, G. Roche, P. Chung, J. Koster, R. Seidl, A. V. Kazantsev, Vladislav Manko, H. Qu, E. Kistenev, Xingguo Li, Takahiro Nakamura, J. Imrek, W. A. Zajc, M. Slunečka, M. Gonin, L. Tomášek, A. Kiss, V. Baublis, A. Denisov, J. E. Frantz, Ajit Kumar Mohanty, V. Cianciolo, T. A. Shibata, C. A. Ogilvie, T. Sato, T. K. Hemmick, Y. Tomita, Sergey Fokin, Henner Buesching, Alexei Khanzadeev, Yasuo Miake, S. Batsouli, H. Masui, A. K. Dubey, Johannes Peter Wessels, D. Isenhower, A. Toia, L. Kochenda, S. Belikov, L. Mašek, E. Stenlund, T. C. Awes, Kyoichiro Ozawa, T. Liška, Jun Kikuchi, Susumu Oda, B. Love, V. S. Pantuev, A. Sukhanov, K. Kurita, H. Pereira, Marcus Hohlmann, C. Vale, A. Durum, A. G. Litvinenko, T. V. Moukhanova, Hideki Hamagaki, K. Aoki, B. S. Chang, A. Kozlov, R. Seto, K. Haruna, Y. Morino, E. J. Desmond, Catherine Micaela Silvestre, P. Mikeš, K. Yamaura, K. Okada, G. David, M. Togawa, J. Park, A. Rakotozafindrabe, E. H. Kim, H. En'yo, J. Klay, Y. Tsuchimoto, F. Matathias, M. J. Leitch, I. E. Yushmanov, D. E. Fields, Kensuke Homma, B. V. Jacak, M. L. Brooks, S. P. Sorensen, P. Constantin, S. Chernichenko, I. Ravinovich, M. McCumber, A. Deshpande, B. Bassalleck, H. Liu, K. Shoji, M. Konno, Seong H. Kim, M. Bai, Y. Watanabe, I. Younus, P. W. Stankus, J. G. Lajoie, A. Soldatov, Tae-Yeon Lee, M. Naglis, Martin Purschke, C. L. Silva, Y. L. Yamaguchi, B. Komkov, I. J. Choi, A. Kravitz, Masayasu Ishihara, C. A. Aidala, R. Bennett, F. Staley, D. Kawall, H. Themann, Norio Saito, M. A. L. Leite, J. Murata, Gerd Joachim Kunde, M. Finger, S. Dairaku, A. Morreale, I. Shein, K. Sedgwick, J. S. Kapustinsky, Z. Fraenkel, O. Zaudtke, V. Babintsev, T. Kempel, Dong-Hun Kim, G. S. Kyle, M. Virius, James Alexander, R. Averbeck, R. K. Choudhury, Byung-Sik Hong, A. Bazilevsky, B. Azmoun, A. Král, Philippe Rosnet, C. Baumann, S. Kametani, M. J. Kweon, C. P. Singh, Alexandre Lebedev, B. M. Johnson, D. M. Lee, A. Isupov, C. Suire, J. Sziklai, K. Kiriluk, Brian Cole, M. Kurosawa, M. Oka, A. Dion, A. Glenn, A. Enokizono, P. Liebing, J. Jin, E. M. Takagui, K. S. Joo, R. S. Towell, I. Garishvili, F. Wei, Laurent Bernard Aphecetche, S. Esumi, D. Sharma, R. Ichimiya, D. Lynch, A. Taketani, C. Y. Chi, V. L. Rykov, T. Dahms, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, V. E. Semenov, Tatsuya Chujo, I. Tserruya, Yu. Efremenko, V. Singh, Jen-Chieh Peng, Xiong Wang, Dong Jo Kim, A. Veicht, and T. L. Thomas
- Subjects
Elastic scattering ,Physics ,Nuclear and High Energy Physics ,Particle physics ,010308 nuclear & particles physics ,media_common.quotation_subject ,Nuclear Theory ,HERA ,01 natural sciences ,7. Clean energy ,Asymmetry ,Nuclear physics ,Momentum ,Pion ,0103 physical sciences ,High Energy Physics::Experiment ,Neutron ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider ,Spin-½ ,media_common - Abstract
The energy dependence of the single-transverse-spin asymmetry, A(N), and the cross section for neutron production at very forward angles were measured in the PHENIX experiment at the Relativistic Heavy Ion Collider for polarized p + p collisions at root s = 200 GeV. The neutrons were observed in forward detectors covering an angular range of up to 2.2 mrad. We report results for neutrons with a momentum fraction of x(F) = 0.45 to 1.0. The energy dependence of the measured cross sections were consistent with x(F) scaling, compared to measurements by an experiment at the Intersecting Storage Ring, which measured neutron production in unpolarized p + p collisions at root s = 30.6-62.7 GeV. The cross sections for large x(F) neutron production for p + p collisions, as well as those in e + p collisions measured at the Hadron-Electron Ring Accelerator, are described by a pion exchange mechanism. The observed forward neutron asymmetries were large, reaching A(N) = -0.08 +/- 0.02 for x(F) = 0.8; the measured backward asymmetries, for negative x(F), were consistent with zero. The observed asymmetry for forward neutron production is discussed within the pion exchange framework, with interference between the spin-flip amplitude due to the pion exchange and nonflip amplitudes from all Reggeon exchanges. Within the pion exchange description, the measured neutron asymmetry is sensitive to the contribution of other Reggeon exchanges even for small amplitudes.
- Published
- 2013
47. Direct photon production ind+Au collisions atsNN=200GeV
- Author
-
A. Devismes, Y. Onuki, Taku Gunji, H. Gong, J. Seele, Alexander Milov, I. Nakagawa, Jan Rak, T. Engelmore, F. Kajihara, S. V. Afanasiev, L. Aphecetche, Takeo Kawabata, H. Pei, M. C. McCain, R. Lacey, Aaron Angerami, Tadaaki Isobe, O. Drapier, S. S. Adler, G. S. Kyle, H. Delagrange, Frank Ellinghaus, N. Willis, R. Granier de Cassagnac, A. Adare, E. R. Kinney, D. P. Morrison, James Alexander, S. Campbell, W. A. Zajc, Hongfang Liu, D. E. Fields, A. Dion, M. Slunečka, R. Averbeck, P. L. McGaughey, Byung-Sik Hong, V. Baublis, S. Zhou, A. Denisov, V. E. Semenov, J. Zimányi, B. V. Jacak, A. Bazilevsky, V. Cianciolo, Johannes Peter Wessels, Hiroaki Ohnishi, K. B. Lee, H. J. Kim, Y. Fukao, S. D. Rolnick, T. Murakami, Y. Tomita, Philippe Rosnet, Sergey Fokin, C. Silvestre, M. McCumber, A. K. Purwar, Robert F. Hobbs, J. M. Qualls, T. Hester, Alexandre Lebedev, R. Vértesi, A. Hoover, A. Hadj Henni, Dmitry Blau, Ch. Finck, Jason Newby, J. Murata, I. Tserruya, Yu. Efremenko, D. M. Lee, Xiaopeng Zong, E. J. Desmond, Masamichi Ishihara, B. Khachaturov, Beomkyu Kim, Jean-Pierre Cussonneau, M. Togawa, J. Hanks, E. Vazquez-Zambrano, D. Roach, S. Belikov, K. S. Joo, Florian Bauer, K. Watanabe, V. Singh, K. Shoji, A. Rakotozafindrabe, P. Tarján, Marisilvia Donadelli, K. M. Kijima, V. Bumazhnov, M. P. Comets, G. B. Kim, Sean A. Kelly, Minghui Liu, Wei Xie, V. S. Pantuev, M. Kasai, T. Matsumoto, K. Kiriluk, M. Chiu, Ajit Kumar Mohanty, Y. Tsuchimoto, Y. Iwanaga, Maya Hachiya Shimomura, I. E. Yushmanov, Eun-Hee Kim, M. Ouchida, Alexei Khanzadeev, Viktor Veszpremi, T. A. Shibata, C. L. Silva, T. Sato, N. Bruner, N. Means, E. Stenlund, Sung Keun Park, J. B. Choi, M. Heffner, P. W. Stankus, Kenneth Francis Read, S. Sawada, J. Ying, A. Franz, K. Hasuko, B. D. Fox, S. Tarafdar, K. S. Sim, J. Hamblen, A. Yu. Semenov, J. Asai, J. H. Bhom, H. A. Gustafsson, T. Ichihara, N. Apadula, R. Tanabe, D. Layton, N. N. Ajitanand, T. V. Moukhanova, Margaret Harvey, V-N. Tram, N. Grau, O. Dietzsch, B. Komkov, E. T. Atomssa, Y. I. Makdisi, Xingguo Li, Junji Tojo, Y. Kwon, J. Gosset, H. Valle, D. Isenhower, A. Toia, L. Mašek, A. G. Hansen, Shingo Sakai, Hirohiko Sato, Takahiro Nakamura, A. V. Kazantsev, Y. Tanaka, E. Mannel, T. K. Shea, J. P. Sullivan, R. Yang, H. Hiejima, Dipanwita Dutta, B. Espagnon, Joakim Nystrand, Eunja Kim, Eva Haslum, B. Lenzi, K. A. Drees, C. Zhang, German Martinez, Motoi Inaba, P. Ružička, Senta Greene, S. Taneja, K. Okada, Jen-Chieh Peng, W. C. Chang, D. McGlinchey, M. I. Nagy, Julia Velkovska, R. M. Wright, L. Tomášek, M. Rosati, M. Velkovsky, S. P. Sorensen, H. En'yo, D. Watanabe, Susumu Oda, A. T. Basye, M. D. Malik, C. L. Woody, A. Berdnikov, J. L. Charvet, Viktor Riabov, K. Imai, P. Constantin, M. J. Leitch, E. Vznuzdaev, H. Qu, H. J. Moon, F. Staley, L. Baksay, O. Chvala, M. Nihashi, A. Durum, B. Fadem, E. O'Brien, Gary Grim, M. J. Tannenbaum, Rushan Han, S. Esumi, S. Batsouli, K. V. Dharmawardane, A. Caringi, T. E. Miller, K. Karatsu, Inkyu Park, M. Inuzuka, R. A. Soltz, D. S. Brown, K. Yamaura, Z. Conesa del Valle, Hideki Hamagaki, K. Aoki, Seong H. Kim, Charles Maguire, S. Leckey, Takafumi Niida, Anne Marie Sickles, A. A. Vinogradov, Henrik Tydesjö, T. C. Awes, Kyoichiro Ozawa, T. Liška, R. Santo, Jiangyong Jia, Y. Goto, A. Ster, A. Enokizono, J. S. Bok, Jun Kikuchi, J. G. Lajoie, T. Hachiya, David D'Enterria, G. David, M. Grosse Perdekamp, V. V. Ikonnikov, K. I. Hahn, P. Chung, Dong Jo Kim, M. E. Connors, A. Pierson, J. M. Burward-Hoy, Josh Moss, Kiyoshi Tanida, M. K. Dayananda, M. Wysocki, D. Sharma, J. Imrek, D. Kleinjan, R. P. Pisani, D. Mukhopadhyay, R. Ichimiya, S. Rembeczki, S. Butsyk, Vladimir Samsonov, H. Iinuma, I. Otterlund, A. Veicht, A. Datta, E. Kistenev, I. J. Choi, A. Kravitz, J. M. Heuser, M. Gonin, Nikolay Tyurin, D. Bucher, I. V. Sourikova, H. Torii, T. L. Thomas, S. Yokkaichi, A. P.T. Palounek, C. H. Kuberg, G. R. Young, L. Sanfratello, David Olle Rickard Silvermyr, T. Jones, Peter Christiansen, K. Das, P. Lichtenwalner, D. Hornback, Tae-Yeon Lee, V.N. Penev, Martin Purschke, M. A. Volkov, J. Chiba, Alice Mignerey, Ryugo S. Hayano, L. D'Orazio, C. A. Aidala, D. Winter, D. Yu Peressounko, C. M. Camacho, E. P. Hartouni, A. Sukhanov, K. Kurita, H. Pereira, Prashant Shukla, G. C. Mishra, Y. Riabov, Kenta Shigaki, P. J. Kroon, Y. Ikeda, A. Taranenko, M. Nguyen, Kazushi Miki, Takao Sakaguchi, Tamas Ferenc Csorgo, T. Kempel, Dong-Hun Kim, J. G. Boissevain, S. F. Pate, Y. Morino, Masashi Kaneta, A. S. Nyanin, C. Klein-Boesing, Ke. Nakamura, Brajesh K. Singh, Rachid Nouicer, Norio Saito, M. Proissl, Tsutomu Mibe, J. L. Nagle, H. Al-Bataineh, X. R. Wang, K. Katou, A. D. Frawley, R. Pak, S. Huang, S. H. Aronson, C. Pinkenburg, V. Papavassiliou, W. Holzmann, Sébastien Gadrat, D. Kotchetkov, M. Stepanov, G. Roche, S. Kametani, T. Horaguchi, Pàl Hidas, J. H. Kang, J. S. Haggerty, A. Romana, A. Morreale, M. A. L. Leite, Z. Fraenkel, J. L. Drachenberg, Y. S. Lai, R. K. Choudhury, S. C. Johnson, B. Azmoun, Y. J. Mao, A. Král, M. J. Kweon, Y. Le Bornec, M. Oka, K. S. Lee, P. Liebing, C. A. Ogilvie, T. K. Hemmick, R. Belmont, J. S. Kapustinsky, J. M. Durham, V. Babintsev, A. Kiss, Henner Buesching, Steve Edwards, Yasuo Miake, P. Chand, Marcus Hohlmann, L. A. Linden Levy, P. Mikeš, X. Jiang, L. Kochenda, M. Issah, H. Kobayashi, Agneta Oskarsson, Y. Berdnikov, Y. Akiba, M. Mishra, S. Nagamiya, Kazuhiro Tanaka, K. Sakashita, Vaclav Vrba, Klaus Johannes Reygers, R. Kohara, Jason Kamin, M. Csanad, Rui Wei, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, J.-G. Park, A. Churyn, D. Jouan, Ferenc Deák, N. Kamihara, Aram Kim, R. Armendariz, C. Oakley, A. Drees, Xiao-yan Li, K. O. Eyser, K. Fujiwara, S. W. Nam, Y. L. Yamaguchi, I. Ravinovich, M. Bai, S. S. Ryu, Zhiying You, R. Bennett, H. W. Van Hecke, M. Kawashima, Ahmed Al-Jamel, M. Finger, S. Dairaku, O. Zaudtke, M. Virius, C. H. Chen, Y. Cobigo, J. E. Frantz, Jongmin Lee, Herve Borel, A. Glenn, A. Taketani, D. S. Jumper, V. L. Rykov, T. Dahms, X. He, Y. Aramaki, V. Peresedov, J. Koster, H. Masui, A. K. Dubey, A. A. Bickley, S. Takagi, S. Y. Fung, B. Meredith, K. N. Barish, S. Bathe, F. Matathias, Kensuke Homma, E. Richardson, John Hill, K. Oyama, S. Chernichenko, S. Sano, H. Lim, B. Bassalleck, Toru Sugitate, L. D. Isenhower, T. J. Uam, M. Konno, M. L. Brooks, B. Love, François Fleuret, Marie Germain, A. G. Litvinenko, J. T. Mitchell, Osamu Jinnouchi, F. K. Wohn, A. Kozlov, R. Seto, K. Haruna, Matthew G. Reuter, Takahiro Fusayasu, R. Seidl, Vladislav Manko, I. D. Ojha, Alexander Malakhov, V. Dzhordzhadze, I. Danchev, L. S. Zolin, W. J. Park, Christopher Rosen, P. D. Barnes, A. Yanovich, S. N. White, Deepa Thomas, T. Chujo, Zvi Hirsh Citron, K. Nakano, W. E. Sondheim, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, X. Camard, C. Vale, B. S. Chang, J. Klay, Y. Nakamiya, D. Lynch, G. Baksay, M. T. Bjorndal, B. Sahlmueller, Y. J. Kim, A. Deshpande, Y. Watanabe, I. Younus, A. Soldatov, D. Kawall, H. Themann, V. I. Kochetkov, Gerd Joachim Kunde, I. Shein, M. Kurosawa, Saskia Mioduszewski, K. Sedgwick, Alberto Baldisseri, Yves Roland Schutz, D. Pal, J. Jin, M. Naglis, E. M. Takagui, C. Baumann, C. P. Singh, B. M. Johnson, R. J. Petti, A. Isupov, C. Suire, J. Sziklai, Brian Cole, R. S. Towell, Susumu Sato, M. Muniruzzaman, I. Garishvili, Akio Kiyomichi, F. Wei, and C. Y. Chi
- Subjects
Physics ,Nuclear and High Energy Physics ,Photon ,010308 nuclear & particles physics ,Virtual particle ,01 natural sciences ,7. Clean energy ,Photon yield ,Nuclear physics ,0103 physical sciences ,Atomic physics ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider - Abstract
Direct photons have been measured in root s(NN) = 200 GeV d + Au collisions at midrapidity. A wide p(T) range is covered by measurements of nearly real virtual photons (1 < p(T) < 6 GeV/c) and real photons (5 < p(T) < 16 GeV/c). The invariant yield of the direct photons in d + Au collisions over the scaled p + p cross section is consistent with unity. Theoretical calculations assuming standard cold-nuclear-matter effects describe the data well for the entire p(T) range. This indicates that the large enhancement of direct photons observed in Au + Au collisions for 1.0 < p(T) < 2.5 GeV/c is attributable to a source other than the initial-state nuclear effects.
- Published
- 2013
48. Υ(1S+2S+3S)production ind+Au andp+pcollisions atsNN=200GeV and cold-nuclear-matter effects
- Author
-
Y. Tanaka, E. Mannel, H. J. Moon, L. Baksay, Charles Maguire, Kiyoshi Tanida, E. Kistenev, P. Lichtenwalner, Alice Mignerey, J. Sun, L. D'Orazio, Y. Fukao, Atsushi Takahara, K. A. Drees, Takao Sakaguchi, Y. Ikeda, Jen-Chieh Peng, C. Klein-Boesing, J. G. Boissevain, T. Hester, A. D. Frawley, R. Akimoto, Inkyu Park, S. Huang, Xiong Wang, Z. Conesa del Valle, Dong Jo Kim, K. R. Andrews, R. A. Soltz, H. Borel, W. Holzmann, Maya Hachiya Shimomura, R. S. Hollis, X. He, Y. Aramaki, V. Peresedov, M. Grosse Perdekamp, Hongfang Liu, D. E. Fields, B. V. Jacak, Y. I. Makdisi, M. E. Connors, C. Pinkenburg, M. J. Tannenbaum, V-N. Tram, N. Grau, K. Das, E. P. Hartouni, M. McCumber, J. Koster, M. Mendoza, S. N. White, Deepa Thomas, I. Tserruya, Yu. Efremenko, V. Singh, C. A. Ogilvie, H. Torii, A. Kim, D. Mukhopadhyay, E. Tennant, S. Rembeczki, L. Aphecetche, S. Batsouli, Motoi Inaba, H. Masui, A. K. Dubey, Zvi Hirsh Citron, M. Stepanov, G. Roche, A. Yu. Semenov, J. Gosset, Kisung Lee, T. K. Hemmick, M. Naglis, R. M. Wright, M. Sarsour, Mate Csanad, A. Iordanova, J. M. Durham, K. Nakano, T. Jones, Peter Christiansen, Yasuo Miake, A. A. Bickley, A. Veicht, K. N. Barish, J. Hanks, J. L. Charvet, M. Nihashi, W. E. Sondheim, A. Dion, Sung Keun Park, Masayasu Ishihara, D. Winter, D. Yu Peressounko, P. Tarján, D. Ivanischev, K. Boyle, P. A. Rukoyatkin, J. S. Kang, L. Kochenda, M. Issah, David D'Enterria, F. Staley, S. Nam, S. Sano, A. Glenn, A. Enokizono, P. Chung, J. Imrek, M. L. Brooks, K. S. Sim, V. S. Pantuev, V. Dzhordzhadze, A. Datta, B. Meredith, A. Deshpande, S. Yokkaichi, N. N. Ajitanand, Y. Nakamiya, Johannes Peter Wessels, K. Sakashita, D. Kotov, B. Love, Y. Watanabe, J. Hamblen, Eunja Kim, Takahiro Nakamura, I. Younus, Y. Kwon, R. Yang, Alexander Milov, Taku Gunji, H. Gong, J. Seele, F. Kajihara, D. McGlinchey, A. G. Litvinenko, S. Tarafdar, Y. J. Mao, A. Soldatov, D. Kawall, Susumu Oda, Jason Kamin, H. Themann, G. Baksay, S. Taneja, S. Butsyk, John Hill, M. I. Nagy, K. Okada, J. Murata, J. H. Kang, A. Kozlov, H. En'yo, A. Durum, A. Kiss, Senta Greene, Gerd Joachim Kunde, I. Nakagawa, Young-Ki Kim, T. Engelmore, R. Seto, K. Imai, M. Gonin, J. S. Haggerty, S. R. Lee, S. P. Stoll, D. Watanabe, I. Shein, M. J. Leitch, T. Sodre, S. Zhou, K. Karatsu, Eva Haslum, B. Lenzi, A. Baldisseri, A. T. Basye, Jongmin Lee, K. Haruna, S. D. Rolnick, J. Ben-Benjamin, Y. Hori, Anne Marie Sickles, I. Danchev, B. Fadem, E. O'Brien, O. Dietzsch, S. Afanasiev, Henner Buesching, Toru Sugitate, Steve Edwards, B. Lewis, K. Sedgwick, Minghui Liu, Catherine Micaela Silvestre, K. Yamaura, S. S.E. Rosendahl, G. Bunce, E. T. Atomssa, B. Sahlmueller, H. Valle, O. Drapier, A. Ster, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, K. Utsunomiya, M. D. Malik, E. Vznuzdaev, X. Gong, Marcus Hohlmann, J. Newby, D. Lynch, Y. J. Kim, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, Dipanwita Dutta, A. Churyn, M. Heffner, D. Jouan, S. Campbell, H. A. Gustafsson, B. H. Kang, V. E. Semenov, A. Sukhanov, K. Kurita, A. Taketani, Kenneth Francis Read, L. A. Linden Levy, P. Mikeš, B. Azmoun, A. Král, F. Matathias, D. S. Jumper, M. J. Kweon, D. Hornback, Kensuke Homma, R. S. Towell, C. Zhang, H. Pereira, Y. Morino, C. Gal, G. R. Young, D. Isenhower, A. Toia, E. Richardson, Julia Velkovska, R. Pak, N. Kamihara, S. Bathe, L. Mašek, H. Al-Ta'Ani, Tatsuya Chujo, P. Ružička, V. L. Rykov, T. Dahms, P. Constantin, I. Garishvili, S. Chernichenko, F. Wei, A. Taranenko, Agneta Oskarsson, François Fleuret, A. V. Kazantsev, Kazushi Miki, T. Horaguchi, M. Rosati, M. Ouchida, Viktor Riabov, Y. Berdnikov, S. H. Lee, Y. Akiba, T. Ichihara, B. Bassalleck, Y. S. Lai, I. Ravinovich, N. Means, Y. Onuki, C. McKinney, M. Mishra, S. Nagamiya, J. Asai, Brajesh K. Singh, Byoungchoo Park, A. Hadj Henni, Vaclav Vrba, C. Harper, M. Konno, Takahiro Fusayasu, Aaron Angerami, K. B. Lee, Klaus Johannes Reygers, M. Oka, Rui Wei, Shingo Sakai, C. Oakley, M. Bai, A. Drees, P. Kline, Alexander Malakhov, C. L. Woody, A. Berdnikov, K. O. Eyser, A. K. Purwar, K. Fujiwara, Beomkyu Kim, E. C. Aschenauer, L. Tomášek, Wei Xie, T. Kempel, Dong-Hun Kim, Jan Rak, D. Silvermyr, Y. L. Yamaguchi, Y. Miyachi, A. A. Vinogradov, J. T. Mitchell, W. A. Zajc, A. Caringi, S. Kaneti, P. Liebing, C. Y. Chi, R. Lacey, L. S. Zolin, Tae-Yeon Lee, V. Baublis, A. Denisov, Yuki Watanabe, V. Cianciolo, W. J. Park, Christopher Rosen, Jiangyong Jia, Martin Purschke, Y. Goto, P. D. Barnes, R. Seidl, Zhiying You, C. A. Aidala, R. Granier de Cassagnac, Y. Tomita, R. Bennett, M. Kawashima, Vladislav Manko, A. Yanovich, L. Patel, A. Adare, C. Baumann, S. Kametani, M. Slunečka, I. V. Sourikova, H. W. Van Hecke, M. Finger, S. Dairaku, T. L. Thomas, C. P. Singh, Sergey Fokin, D. Broxmeyer, I. J. Choi, D. Roach, K. M. Kijima, T. C. Awes, B. M. Johnson, S. Belikov, R. J. Petti, Kyoichiro Ozawa, T. Liška, Ryugo S. Hayano, H. Qu, O. Zaudtke, A. Morreale, J. S. Bok, Jun Kikuchi, A. Isupov, C. Suire, Y. Riabov, Kenta Shigaki, Z. Fraenkel, M. Nguyen, Tadaaki Isobe, M. Virius, J. Sziklai, Gary Grim, Hideki Hamagaki, K. Aoki, G. David, A. S. Nyanin, K. I. Hahn, K. Hashimoto, K. V. Dharmawardane, R. K. Choudhury, Brian Cole, C. Vale, M. Kurosawa, K. S. Joo, Rachid Nouicer, A. N. Zelenski, M. Proissl, Marisilvia Donadelli, B. S. Chang, V. Bumazhnov, Xingguo Li, P. L. McGaughey, J. Klay, K. Watanabe, C. H. Chen, M. Chiu, N. Apadula, A. Manion, M. Savastio, R. Tanabe, H. Iinuma, D. Layton, K. Shoji, A. Vossen, S. P. Sorensen, A. P.T. Palounek, J. Jin, S. Esumi, W. C. Chang, O. Chvala, E. M. Takagui, D. Sharma, R. Ichimiya, Rushan Han, Seong H. Kim, Vladimir Samsonov, J. G. Lajoie, A. Kravitz, Tamas Ferenc Csorgo, J. L. Nagle, D. John, P. Castera, D. Kleinjan, Eric Appelt, B. Komkov, Norio Saito, Tsutomu Mibe, M. A. L. Leite, H. H. Shim, S. H. Lim, R. Belmont, J. S. Kapustinsky, V. Babintsev, M. Tomášek, G. S. Kyle, James Alexander, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Philippe Rosnet, Alexandre Lebedev, R. P. Pisani, D. M. Lee, K. Kiriluk, T. Murakami, E. H. Kim, X. Jiang, L. Guo, P. W. Stankus, Alexei Khanzadeev, E. Stenlund, J. B. Choi, S. Sawada, J. Ying, A. Franz, J. H. Bhom, T. V. Moukhanova, R. Vértesi, Takafumi Niida, J. E. Frantz, J. S. Yoo, M. K. Dayananda, Dmitry Blau, M. Wysocki, B. Bannier, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, C. M. Camacho, Prashant Shukla, J. Park, A. Rakotozafindrabe, S. F. Pate, M. Kasai, Y. Tsuchimoto, Ke. Nakamura, H. Al-Bataineh, R. Armendariz, Y. Iwanaga, S. Motschwiller, I. E. Yushmanov, V. Papavassiliou, and H. Pei
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,High energy ,Deuterium ,High Energy Physics::Experiment ,Rapidity ,Atomic physics ,Nuclear Experiment ,Relativistic Heavy Ion Collider ,Nuclear matter ,Lower energy - Abstract
The three gamma states, gamma (1S + 2S + 3S), are measured in d + Au and p + p collisions at root s(NN) = 200 GeV and rapidities 1.2 < vertical bar y vertical bar < 2.2 by the PHENIX experiment at the Relativistic Heavy Ion Collider. Cross sections for the inclusive gamma (1S + 2S + 3S) production are obtained. The inclusive yields per binary collision for d + Au collisions relative to those in p + p collisions (R-dAu) are found to be 0.62 +/- 0.26 (stat) +/- 0.13 (syst) in the gold-going direction and 0.91 +/- 0.33 (stat) +/- 0.16 (syst) in the deuteron-going direction. The measured results are compared to a nuclear-shadowing model, EPS09 [Eskola et al., J. High Energy Phys. 04 (2009) 065], combined with a final-state breakup cross section, sigma(br), and compared to lower energy p + A results. We also compare the results to the PHENIX J/psi results [Adare et al., Phys. Rev. Lett. 107, 142301 (2011)]. The rapidity dependence of the observed gamma suppression is consistent with lower energy p + A measurements. DOI: 10.1103/PhysRevC.87.044909
- Published
- 2013
49. Transverse-momentum dependence of theJ/ψnuclear modification ind+Au collisions atsNN=200GeV
- Author
-
K. Fujiwara, Y. Nakamiya, Y. L. Yamaguchi, Marisilvia Donadelli, V. Bumazhnov, G. Baksay, T. Murakami, R. Tanabe, B. Sahlmueller, Y. J. Kim, H. W. Van Hecke, J. T. Mitchell, S. Sawada, O. Dietzsch, Rushan Han, Alice Mignerey, L. D'Orazio, H. A. Gustafsson, J. Ying, A. Franz, E. T. Atomssa, H. Valle, R. Seidl, Dipanwita Dutta, K. Karatsu, Takao Sakaguchi, Vladislav Manko, A. Enokizono, M. Chiu, P. L. McGaughey, P. Chung, Julia Velkovska, Y. Tanaka, S. Bathe, C. A. Ogilvie, E. Mannel, Agneta Oskarsson, P. Ružička, Y. Berdnikov, Y. Akiba, S. Nagamiya, M. Slunečka, A. D. Frawley, Vaclav Vrba, Klaus Johannes Reygers, Rui Wei, Anne Marie Sickles, A. Kiss, T. K. Hemmick, M. Rosati, K. A. Drees, A. V. Kazantsev, J. M. Durham, Yasuo Miake, Y. J. Mao, Henner Buesching, Steve Edwards, Marcus Hohlmann, Prashant Shukla, S. Huang, Viktor Riabov, L. A. Linden Levy, Beomkyu Kim, A. Datta, T. L. Thomas, T. Ichihara, X. He, I. Ravinovich, S. F. Pate, Ke. Nakamura, H. J. Moon, Vladimir Samsonov, L. Tomášek, Gary Grim, K. V. Dharmawardane, J. H. Kang, J. S. Haggerty, S. P. Sorensen, Alexei Khanzadeev, H. Al-Bataineh, S. Tarafdar, L. Baksay, Takahiro Fusayasu, V. S. Pantuev, Senta Greene, Y. Aramaki, Jiangyong Jia, Y. Goto, E. Stenlund, V. Peresedov, S. Belikov, Alexander Malakhov, W. Holzmann, Robert Vertesi, L. Kochenda, M. Issah, A. T. Basye, J. B. Choi, J. Hamblen, J. Koster, G. R. Young, O. Chvala, Eva Haslum, T. C. Awes, Kyoichiro Ozawa, T. Liška, X. Jiang, D. Kleinjan, Ajit Kumar Mohanty, T. A. Shibata, C. L. Silva, T. Sato, Hongfang Liu, D. E. Fields, Maya Hachiya Shimomura, Y. I. Makdisi, V. Papavassiliou, B. Fadem, E. O'Brien, D. Silvermyr, B. V. Jacak, J. S. Bok, Jun Kikuchi, H. Masui, Ryugo S. Hayano, Y. Riabov, J. G. Lajoie, Kenta Shigaki, Tamas Ferenc Csorgo, K. Okada, L. S. Zolin, W. J. Park, D. Isenhower, S. Afanasiev, A. Toia, R. A. Soltz, M. Bai, M. McCumber, K. N. Barish, J. L. Nagle, I. J. Choi, A. Kravitz, S. Nam, H. En'yo, Christopher Rosen, M. Nguyen, Y. S. Lai, M. J. Leitch, M. J. Tannenbaum, C. Vale, M. Gonin, K. Das, S. Sano, A. Yanovich, J. Newby, Aaron Angerami, Y. Ikeda, B. Azmoun, A. Král, H. Torii, M. K. Dayananda, A. Deshpande, A. S. Nyanin, A. Sukhanov, K. Kurita, A. Kim, S. Rembeczki, W. A. Zajc, M. Wysocki, M. L. Brooks, H. Pereira, J. Hanks, Taku Gunji, H. Gong, J. Seele, Minghui Liu, M. Grosse Perdekamp, Y. Morino, B. Love, Rachid Nouicer, M. Proissl, J. H. Bhom, Y. J. Kwon, F. Kajihara, M. E. Connors, B. Meredith, V. Baublis, A. Denisov, V. Cianciolo, F. Matathias, Kensuke Homma, C. Pinkenburg, A. G. Litvinenko, Sung Keun Park, M. Heffner, D. Hornback, Kenneth Francis Read, E. Richardson, Y. Watanabe, K. S. Sim, K. B. Lee, N. N. Ajitanand, S. Butsyk, John Hill, Sergey Fokin, M. Oka, T. V. Moukhanova, R. Seto, G. Roche, S. Zhou, B. Bassalleck, Dmitry Blau, K. S. Lee, A. Taranenko, I. Danchev, M. Konno, R. Yang, S. D. Rolnick, Toru Sugitate, Takahiro Nakamura, Kazushi Miki, K. Tanida, D. Roach, K. M. Kijima, M. Ouchida, S. Taneja, I. Younus, Brajesh K. Singh, D. McGlinchey, T. Jones, Peter Christiansen, E. J. Desmond, P. Liebing, Susumu Oda, N. Means, K. Imai, K. S. Joo, Xingguo Li, D. Winter, D. Yu Peressounko, A. Durum, Y. Onuki, Zhiying You, E. Vazquez-Zambrano, Catherine Micaela Silvestre, K. Yamaura, Jan Rak, S. Yokkaichi, R. Lacey, R. Bennett, R. Granier de Cassagnac, A. Adare, N. Apadula, M. Kawashima, D. Kawall, François Fleuret, S. Esumi, D. Sharma, R. Ichimiya, M. Finger, S. N. White, M. Kasai, C. Baumann, Y. Tsuchimoto, C. P. Singh, C. L. Woody, A. Berdnikov, Martin Purschke, C. A. Aidala, H. Themann, Deepa Thomas, B. Komkov, H. Qu, Y. Iwanaga, Norio Saito, Tsutomu Mibe, M. A. L. Leite, Zvi Hirsh Citron, Jongmin Lee, K. Nakano, B. M. Johnson, I. E. Yushmanov, A. Caringi, R. Belmont, J. S. Kapustinsky, V. Babintsev, W. E. Sondheim, R. J. Petti, A. Isupov, G. S. Kyle, James Alexander, D. Ivanischev, A. Morreale, J. Sziklai, K. Boyle, P. A. Rukoyatkin, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, Brian Cole, Z. Fraenkel, R. S. Towell, Alexandre Lebedev, I. Garishvili, F. Wei, J. Murata, D. M. Lee, R. K. Choudhury, I. V. Sourikova, C. Y. Chi, D. Lynch, Gerd Joachim Kunde, Hideki Hamagaki, K. Aoki, M. Kurosawa, J. E. Frantz, I. Shein, G. David, K. I. Hahn, A. Taketani, Mate Csanad, M. Nihashi, R. P. Pisani, D. S. Jumper, K. Sedgwick, Y. Fukao, T. Hester, N. Grau, J. Jin, E. M. Takagui, Motoi Inaba, R. M. Wright, T. Dahms, S. Dairaku, K. Watanabe, M. Naglis, H. Pei, Masayasu Ishihara, M. Virius, Manabu Togawa, K. Shoji, K. Sakashita, C. H. Chen, T. Horaguchi, Jason Kamin, P. W. Stankus, S. P. Stoll, S. S.E. Rosendahl, G. Bunce, Charles Maguire, D. Jouan, R. Pak, D. Watanabe, M. D. Malik, E. Vznuzdaev, E. Kistenev, P. Lichtenwalner, C. Oakley, A. Drees, A. Dion, M. I. Nagy, Johannes Peter Wessels, T. Kempel, I. Tserruya, Yu. Efremenko, V. Singh, A. Glenn, Eunja Kim, Alexander Milov, I. Nakagawa, T. Engelmore, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, Tatsuya Chujo, Jen-Chieh Peng, Inkyu Park, Xiong Wang, Z. Conesa del Valle, Dong Jo Kim, and A. Veicht
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,010308 nuclear & particles physics ,7. Clean energy ,01 natural sciences ,Interpretation (model theory) ,Nuclear physics ,Deuterium ,0103 physical sciences ,Transverse momentum ,High Energy Physics::Experiment ,Rapidity ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider - Abstract
We present measured J/psi production rates in d + Au collisions at root s(NN) = 200 GeV over broad ranges of transverse momentum (p(T) = 0-14 GeV/c) and rapidity (-2.2 1) for p(T) > 2 GeV/c. The observed enhancement at negative rapidity has implications for the interpretation of the observed modification in heavy-ion collisions at high p(T). DOI: 10.1103/PhysRevC.87.034904
- Published
- 2013
50. Erratum: Measurement of transverse single-spin asymmetries forJ/ψproduction in polarizedp+pcollisions ats=200 GeV[Phys. Rev. D82, 112008 (2010)]
- Author
-
A. Adare, S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander, H. Al-Ta’ani, A. Angerami, K. Aoki, N. Apadula, L. Aphecetche, Y. Aramaki, J. Asai, E. T. Atomssa, R. Averbeck, T. C. Awes, B. Azmoun, V. Babintsev, M. Bai, G. Baksay, L. Baksay, A. Baldisseri, K. N. Barish, P. D. Barnes, B. Bassalleck, A. T. Basye, S. Bathe, S. Batsouli, V. Baublis, C. Baumann, A. Bazilevsky, S. Belikov, R. Belmont, R. Bennett, A. Berdnikov, Y. Berdnikov, J. H. Bhom, A. A. Bickley, D. S. Blau, J. G. Boissevain, J. S. Bok, H. Borel, N. Borggren, K. Boyle, M. L. Brooks, H. Buesching, V. Bumazhnov, G. Bunce, S. Butsyk, C. M. Camacho, S. Campbell, A. Caringi, B. S. Chang, W. C. Chang, J.-L. Charvet, C.-H. Chen, S. Chernichenko, C. Y. Chi, M. Chiu, I. J. Choi, J. B. Choi, R. K. Choudhury, P. Christiansen, T. Chujo, P. Chung, A. Churyn, O. Chvala, V. Cianciolo, Z. Citron, B. A. Cole, Z. Conesa del Valle, M. Connors, P. Constantin, M. Csanád, T. Csörgő, T. Dahms, S. Dairaku, I. Danchev, K. Das, A. Datta, G. David, M. K. Dayananda, A. Denisov, D. d’Enterria, A. Deshpande, E. J. Desmond, K. V. Dharmawardane, O. Dietzsch, A. Dion, M. Donadelli, L. D’Orazio, O. Drapier, A. Drees, K. A. Drees, A. K. Dubey, J. M. Durham, A. Durum, D. Dutta, V. Dzhordzhadze, S. Edwards, Y. V. Efremenko, F. Ellinghaus, T. Engelmore, A. Enokizono, H. En’yo, S. Esumi, K. O. Eyser, B. Fadem, D. E. Fields, M. Finger, F. Fleuret, S. L. Fokin, Z. Fraenkel, J. E. Frantz, A. Franz, A. D. Frawley, K. Fujiwara, Y. Fukao, T. Fusayasu, I. Garishvili, A. Glenn, H. Gong, M. Gonin, J. Gosset, Y. Goto, R. Granier de Cassagnac, N. Grau, S. V. Greene, G. Grim, M. Grosse Perdekamp, T. Gunji, H.-Å. Gustafsson, A. Hadj Henni, J. S. Haggerty, K. I. Hahn, H. Hamagaki, J. Hamblen, J. Hanks, R. Han, E. P. Hartouni, K. Haruna, E. Haslum, R. Hayano, M. Heffner, T. K. Hemmick, T. Hester, X. He, J. C. Hill, M. Hohlmann, W. Holzmann, K. Homma, B. Hong, T. Horaguchi, D. Hornback, S. Huang, T. Ichihara, R. Ichimiya, H. Iinuma, Y. Ikeda, K. Imai, J. Imrek, M. Inaba, D. Isenhower, M. Ishihara, T. Isobe, M. Issah, A. Isupov, D. Ivanischev, Y. Iwanaga, B. V. Jacak, J. Jia, X. Jiang, J. Jin, B. M. Johnson, T. Jones, K. S. Joo, D. Jouan, D. S. Jumper, F. Kajihara, S. Kametani, N. Kamihara, J. Kamin, J. H. Kang, J. Kapustinsky, K. Karatsu, M. Kasai, D. Kawall, M. Kawashima, A. V. Kazantsev, T. Kempel, A. Khanzadeev, K. M. Kijima, J. Kikuchi, A. Kim, B. I. Kim, D. H. Kim, D. J. Kim, E. J. Kim, E. Kim, S. H. Kim, Y.-J. Kim, E. Kinney, K. Kiriluk, Á. Kiss, E. Kistenev, J. Klay, C. Klein-Boesing, L. Kochenda, B. Komkov, M. Konno, J. Koster, A. Kozlov, A. Král, A. Kravitz, G. J. Kunde, K. Kurita, M. Kurosawa, M. J. Kweon, Y. Kwon, G. S. Kyle, R. Lacey, Y. S. Lai, J. G. Lajoie, D. Layton, A. Lebedev, D. M. Lee, J. Lee, K. B. Lee, K. S. Lee, T. Lee, M. J. Leitch, M. A. L. Leite, B. Lenzi, P. Lichtenwalner, P. Liebing, L. A. Linden Levy, T. Liška, A. Litvinenko, H. Liu, M. X. Liu, X. Li, B. Love, D. Lynch, C. F. Maguire, Y. I. Makdisi, A. Malakhov, M. D. Malik, V. I. Manko, E. Mannel, Y. Mao, L. Mašek, H. Masui, F. Matathias, M. McCumber, P. L. McGaughey, N. Means, B. Meredith, Y. Miake, T. Mibe, A. C. Mignerey, P. Mikeš, K. Miki, A. Milov, M. Mishra, J. T. Mitchell, A. K. Mohanty, H. J. Moon, Y. Morino, A. Morreale, D. P. Morrison, T. V. Moukhanova, D. Mukhopadhyay, T. Murakami, J. Murata, S. Nagamiya, J. L. Nagle, M. Naglis, M. I. Nagy, I. Nakagawa, Y. Nakamiya, K. R. Nakamura, T. Nakamura, K. Nakano, S. Nam, J. Newby, M. Nguyen, M. Nihashi, T. Niita, R. Nouicer, A. S. Nyanin, C. Oakley, E. O’Brien, S. X. Oda, C. A. Ogilvie, K. Okada, M. Oka, Y. Onuki, A. Oskarsson, M. Ouchida, K. Ozawa, R. Pak, A. P. T. Palounek, V. Pantuev, V. Papavassiliou, I. H. Park, J. Park, S. K. Park, W. J. Park, S. F. Pate, H. Pei, J.-C. Peng, H. Pereira, V. Peresedov, D. Yu. Peressounko, R. Petti, C. Pinkenburg, R. P. Pisani, M. Proissl, M. L. Purschke, A. K. Purwar, H. Qu, J. Rak, A. Rakotozafindrabe, I. Ravinovich, K. F. Read, S. Rembeczki, K. Reygers, V. Riabov, Y. Riabov, E. Richardson, D. Roach, G. Roche, S. D. Rolnick, M. Rosati, C. A. Rosen, S. S. E. Rosendahl, P. Rosnet, P. Rukoyatkin, P. Ružička, V. L. Rykov, B. Sahlmueller, N. Saito, T. Sakaguchi, S. Sakai, K. Sakashita, V. Samsonov, S. Sano, T. Sato, S. Sawada, K. Sedgwick, J. Seele, R. Seidl, A. Yu. Semenov, V. Semenov, R. Seto, D. Sharma, I. Shein, T.-A. Shibata, K. Shigaki, M. Shimomura, K. Shoji, P. Shukla, A. Sickles, C. L. Silva, D. Silvermyr, C. Silvestre, K. S. Sim, B. K. Singh, C. P. Singh, V. Singh, M. Slunečka, A. Soldatov, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, F. Staley, P. W. Stankus, E. Stenlund, M. Stepanov, A. Ster, S. P. Stoll, T. Sugitate, C. Suire, A. Sukhanov, J. Sziklai, E. M. Takagui, A. Taketani, R. Tanabe, Y. Tanaka, S. Taneja, K. Tanida, M. J. Tannenbaum, S. Tarafdar, A. Taranenko, P. Tarján, H. Themann, D. Thomas, T. L. Thomas, M. Togawa, A. Toia, L. Tomášek, Y. Tomita, H. Torii, R. S. Towell, V-N. Tram, I. Tserruya, Y. Tsuchimoto, C. Vale, H. Valle, H. W. van Hecke, E. Vazquez-Zambrano, A. Veicht, J. Velkovska, R. Vértesi, A. A. Vinogradov, M. Virius, V. Vrba, E. Vznuzdaev, X. R. Wang, D. Watanabe, K. Watanabe, Y. Watanabe, F. Wei, J. Wessels, S. N. White, D. Winter, C. L. Woody, R. M. Wright, M. Wysocki, W. Xie, Y. L. Yamaguchi, K. Yamaura, R. Yang, A. Yanovich, J. Ying, S. Yokkaichi, G. R. Young, I. Younus, Z. You, I. E. Yushmanov, W. A. Zajc, O. Zaudtke, C. Zhang, S. Zhou, and L. Zolin
- Subjects
Physics ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,media_common.quotation_subject ,Zero (complex analysis) ,Value (computer science) ,01 natural sciences ,Asymmetry ,Nuclear physics ,Transverse plane ,Correlation function (statistical mechanics) ,0103 physical sciences ,High Energy Physics::Experiment ,Production (computer science) ,Nuclear Experiment ,010306 general physics ,Relativistic Heavy Ion Collider ,media_common ,Spin-½ - Abstract
We previously reported [Phys. Rev. D 82, 112008 (2010)] measurements of transverse single-spin asymmetries, A_N, in J/psi production from transversely polarized p+p collisions at sqrt(s)=200 GeV with data taken by the PHENIX experiment at the Relativistic Heavy Ion Collider in 2006 and 2008. Subsequently, we have found errors in the analysis procedures for the 2008 data, which resulted in an erroneous value for the extracted A_N. The errors affected the sorting of events into the correct left/right and forward/backward bins. This produced an incorrect value for the 2008 result, but the 2006 result is unaffected. We have conducted two independent reanalyses with these errors corrected, and we present here the corrected values for the 2008 data and the combined results for 2006 and 2008. The new combined spin asymmetry in the forward region is A_N = -0.026+/-0.026(stat)+/-0.003(sys). Since this asymmetry is consistent with zero, we no longer claim that our results suggest a possible non-zero trigluon correlation function in transversely polarized protons.
- Published
- 2012
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.