Energy dependence of pi(+/-), p and (p)over-bar transverse momentum spectra for Au+Au collisions at root SNN=62.4 and 200 GeV uri icon

abstract

  • We study the energy dependence of the transverse momentum (pT) spectra for charged pions, protons and anti-protons for Au + Au collisions at sqrt(sNN) = 62.4 and 200 GeV. Data are presented at mid-rapidity (| y | < 0.5) for 0.2 < pT < 12 GeV / c. In the intermediate pT region (2 < pT < 6 GeV / c), the nuclear modification factor is higher at 62.4 GeV than at 200 GeV, while at higher pT (pT > 7 GeV / c) the modification is similar for both energies. The p / + and over(p, ) / - ratios for central collisions at sqrt(sNN) = 62.4 GeV peak at pT 2 GeV / c. In the pT range where recombination is expected to dominate, the p / + ratios at 62.4 GeV are larger than at 200 GeV, while the over(p, ) / - ratios are smaller. For pT > 2 GeV / c, the over(p, ) / - ratios at the two beam energies are independent of pT and centrality indicating that the dependence of the over(p, ) / - ratio on pT does not change between 62.4 and 200 GeV. These findings challenge various models incorporating jet quenching and/or constituent quark coalescence. 2007 Elsevier B.V. All rights reserved.

published proceedings

  • PHYSICS LETTERS B

altmetric score

  • 3

author list (cited authors)

  • Abelev, B. I., Aggarwal, M. M., Ahammed, Z., Anderson, B. D., Arkhipkin, D., Averichev, G. S., ... Zuo, J. X.

citation count

  • 148

complete list of authors

  • Abelev, BI||Aggarwal, MM||Ahammed, Z||Anderson, BD||Arkhipkin, D||Averichev, GS||Bai, Y||Balewski, J||Barannikova, O||Barnby, LS||Baumgart, S||Belaga, VV||Bellingeri-Laurikainen, A||Bellwied, R||Benedosso, F||Betts, RR||Bharadwaj, S||Bhasin, A||Bhati, AK||Bichsel, H||Bielcik, J||Bielcikova, J||Billmeier, A||Bland, LC||Blyth, S-L||Bombara, M||Bonner, BE||Botje, M||Bouchet, J||Brandin, AV||Bravar, A||Burton, TP||Bystersky, M||Cadman, RV||Cai, XZ||Caines, H||de la Barca Sanchez, M Calderon||Callner, J||Catu, O||Cebra, D||Chajecki, Z||Chaloupka, P||Chattopadhyay, S||Chen, HF||Chen, JH||Chen, JY||Cheng, J||Cherney, M||Chikanian, A||Choi, HA||Christie, W||Chung, SU||Coffin, JP||Cormier, TM||Cosentino, MR||Cramer, JG||Crawford, HJ||Das, D||Dash, S||Daugherity, M||de Moura, MM||Dedovich, TG||DePhillips, M||Derevschikov, AA||Didenko, L||Dietel, T||Djawotho, P||Dogra, SM||Dong, X||Drachenberg, JL||Draper, JE||Du, F||Dunin, VB||Dunlop, JC||Mazumdar, MR Dutta||Eckardt, V||Edwards, WR||Efimov, LG||Emelianov, V||Engelage, J||Eppley, G||Erazmus, B||Estienne, M||Fachini, P||Fatemi, R||Fedorisin, J||Feng, A||Filip, P||Finch, E||Fine, V||Fisyak, Y||Fornazier, KSF||Fu, J||Gagliardi, CA||Gaillard, L||Ganti, MS||Garcia-Solis, E||Ghazikhanian, V||Ghosh, P||Gorbunov, YG||Gos, H||Grebenyuk, O||Grosnick, D||Guertin, SM||Guimaraes, KSFF||Gupta, N||Haag, B||Hallman, TJ||Hamed, A||Harris, JW||He, W||Heinz, M||Henry, TW||Hepplemann, S||Hippolyte, B||Hirsch, A||Hjort, E||Hoffman, AM||Hoffmann, GW||Hofman, D||Hollis, R||Horner, MJ||Huang, HZ||Hughes, EW||Humanic, TJ||Igo, G||Iordanova, A||Jacobs, P||Jacobs, WW||Jakl, P||Jia, F||Jiang, H||Jones, PG||Judd, EG||Kabana, S||Kang, K||Kapitan, J||Kaplan, M||Keane, D||Kechechyan, A||Kettler, D||Khodyrev, V Yu||Kim, BC||Kiryluk, J||Kisiel, A||Kislov, EM||Klein, SR||Knospe, AG||Kocoloski, A||Koetke, DD||Kollegger, T||Kopytine, M||Kotchenda, L||Kouchpil, V||Kowalik, KL||Kramer, M||Kravtsov, P||Kravtsov, VI||Krueger, K||Kuhn, C||Kulikov, AI||Kumar, A||Kurnadi, P||Kuznetsov, AA||Lamont, MAC||Landgraf, JM||Lange, S||LaPointe, S||Laue, F||Lauret, J||Lebedev, A||Lednicky, R||Lee, C-H||Lehocka, S||LeVine, MJ||Li, C||Li, Q||Li, Y||Lin, G||Lin, X||Lindenbaum, SJ||Lisa, MA||Liu, F||Liu, H||Liu, J||Liu, L||Ljubicic, T||Llope, WJ||Long, H||Longacre, RS||Lopez-Noriega, M||Love, WA||Lu, Y||Ludlam, T||Lynn, D||Ma, GL||Ma, JG||Ma, YG||Mahapatra, DP||Majka, R||Mangotra, LK||Manweiler, R||Margetis, S||Markert, C||Martin, L||Matis, HS||Matulenko, Yu A||McClain, CJ||McShane, TS||Melnick, Yu||Meschanin, A||Millane, J||Miller, ML||Minaev, NG||Mioduszewski, S||Mironov, C||Mischke, A||Mitchell, J||Mohanty, B||Molnar, L||Morozov, DA||Munhoz, MG||Nandi, BK||Nattrass, C||Nayak, TK||Nelson, JM||Nepali, C||Netrakanti, PK||Nikitin, VA||Nogach, LV||Nurushev, SB||Odyniec, G||Ogawa, A||Okorokov, V||Oldenburg, M||Olson, D||Pachr, M||Pal, SK||Panebratsev, Y||Panitkin, SY||Pavlinov, AI||Pawlak, T||Peitzmann, T||Perevoztchikov, V||Perkins, C||Peryt, W||Phatak, SC||Planinic, M||Pluta, J||Poljak, N||Porile, N||Poskanzer, AM||Potekhin, M||Potrebenikova, E||Potukuchi, BVKS||Prindle, D||Pruneau, C||Putschke, J||Qattan, IA||Raniwala, R||Raniwala, S||Ray, RL||Razin, SV||Reinnarth, J||Relyea, D||Ridiger, A||Ritter, HG||Roberts, JB||Rogachevskiy, OV||Romero, JL||Rose, A||Roy, C||Ruan, L||Russcher, MJ||Sahoo, R||Sakrejda, I||Sakuma, T||Salur, S||Sandweiss, J||Sarsour, M||Savin, I||Sazhin, PS||Schambach, J||Scharenberg, RP||Schmitz, N||Seger, J||Selyuzhenkov, I||Seyboth, P||Shabetai, A||Shahaliev, E||Shao, M||Sharma, M||Shen, WQ||Shimanskiy, SS||Sichtermann, E||Simon, F||Singaraju, RN||Smirnov, N||Snellings, R||Sorensen, P||Sowinski, J||Speltz, J||Spinka, HM||Srivastava, B||Stadnik, A||Stanislaus, TDS||Stock, R||Strikhanov, M||Stringfellow, B||Suaide, AAP||Suarez, MC||Subba, NL||Sumbera, M||Sun, XM||Sun, Z||Surrow, B||Symons, TJM||de Toledo, A Szanto||Takahashi, J||Tang, AH||Tarnowsky, T||Thomas, JH||Timmins, AR||Timoshenko, S||Tokarev, M||Trainor, TA||Trentalange, S||Tribble, RE||Tsai, OD||Ulery, J||Ullrich, T||Underwood, DG||Van Buren, G||van der Kolk, N||van Leeuwen, M||Molen, AM Vander||Varma, R||Vasilevski, IM||Vasiliev, AN||Vernet, R||Vigdor, SE||Viyogi, YP||Vokal, S||Voloshin, SA||Waggoner, WT||Wang, F||Wang, G||Wang, JS||Wang, XL||Wang, Y||Watson, JW||Webb, J-C||Westfall, GD||Wetzler, A||Whitten, C Jr||Wieman, H||Wissink, SW||Witt, R||Wu, J||Wu, J||Xu, N||Xu, QH||Xu, Z||Yepes, P||Yoo, I-K||Yue, Q||Yurevich, VI||Zhan, W||Zhang, H||Zhang, WM||Zhang, Y||Zhang, ZP||Zhao, Y||Zhong, C||Zoulkarneev, R||Zoulkarneeva, Y||Zubarev, AN||Zuo, JX

publication date

  • November 2007