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Energy dependence of $\pi^{\pm}$, $p$ and $\bar{p}$ transverse momentum spectra for Au+Au collisions at $\sqrt{s_{NN}}$=62.4 and 200 GeV

B.I. Abelev M.M. Aggarwal Z. Ahammed B.D. Anderson D. Arkhipkin G.S. Averichev Y. Bai J. Balewski O. Barannikova L.S. Barnby S. Baumgart V.V. Belaga A. Bellingeri-Laurikainen 1 R. Bellwied F. Benedosso R.R. Betts S. Bharadwaj A. Bhasin A.K. Bhati H. Bichsel J. Bielcik J. Bielcikova A. Billmeier L.C. Bland S.-L. Blyth M. Bombara B.E. Bonner M. Botje J. Bouchet 1 A.V. Brandin A. Bravar T.P. Burton M. Bystersky R.V. Cadman X.Z. Cai H. Caines M. Calderon de la Barca Sanchez J. Callner O. Catu D. Cebra Z. Chajecki P. Chaloupka S. Chattopadhyay H.F. Chen J.H. Chen J.Y. Chen J. Cheng M. Cherney A. Chikanian H.A. Choi W. Christie S.U. Chung J.P. Coffin 2 T.M. Cormier M.R. Cosentino J.G. Cramer H.J. Crawford D. Das S. Dash M. Daugherity M.M. de Moura T.G. Dedovich M. Dephillips A.A. Derevschikov L. Didenko T. Dietel P. Djawotho S.M. Dogra X. Dong J.L. Drachenberg J.E. Draper F. Du V.B. Dunin J.C. Dunlop M.R. Dutta Mazumdar V. Eckardt W.R. Edwards L.G. Efimov V. Emelianov J. Engelage G. Eppley B. Erazmus 1 Magali Estienne 2 P. Fachini R. Fatemi J. Fedorisin A. Feng P. Filip E. Finch V. Fine Y. Fisyak K.S.F. Fornazier J. Fu C.A. Gagliardi L. Gaillard M.S. Ganti E. Garcia-Solis V. Ghazikhanian P. Ghosh Y.G. Gorbunov H. Gos O. Grebenyuk D. Grosnick S.M. Guertin K.S.F.F. Guimaraes N. Gupta B. Haag T.J. Hallman A. Hamed J.W. Harris W. He M. Heinz T.W. Henry S. Hepplemann B. Hippolyte 2 A. Hirsch E. Hjort A.M. Hoffman G.W. Hoffmann D. Hofman R. Hollis M.J. Horner H.Z. Huang E.W. Hughes T.J. Humanic G. Igo A. Iordanova P. Jacobs W.W. Jacobs P. Jakl F. Jia H. Jiang P.G. Jones E.G. Judd S. Kabana 1 K. Kang J. Kapitan M. Kaplan D. Keane A. Kechechyan D. Kettler V.Yu. Khodyrev B.C. Kim J. Kiryluk A. Kisiel E.M. Kislov S.R. Klein A.G. Knospe A. Kocoloski D.D. Koetke T. Kollegger M. Kopytine L. Kotchenda V. Kouchpil K.L. Kowalik M. Kramer P. Kravtsov V.I. Kravtsov K. Krueger C. Kuhn 2 A.I. Kulikov A. Kumar P. Kurnadi A.A. Kuznetsov M.A.C. Lamont J.M. Landgraf S. Lange S. Lapointe F. Laue J. Lauret A. Lebedev R. Lednicky C.H. Lee S. Lehocka M.J. Levine C. Li Q. Li Y. Li G. Lin X. Lin S.J. Lindenbaum M.A. Lisa F. Liu Hong Liu J. Liu L. Liu T. Ljubicic W.J. Llope H. Long R.S. Longacre M. Lopez-Noriega W.A. Love Y. Lu T. Ludlam D. Lynn G.L. Ma J.G. Ma Y.G. Ma D.P. Mahapatra R. Majka L.K. Mangotra R. Manweiler S. Margetis C. Markert Lilian Martin 1 H.S. Matis Yu.A. Matulenko C.J. Mcclain T.S. Mcshane Yu. Melnick A. Meschanin J. Millane M.L. Miller N.G. Minaev S. Mioduszewski C. Mironov A. Mischke J. Mitchell B. Mohanty L. Molnar D.A. Morozov M.G. Munhoz B.K. Nandi C. Nattrass T.K. Nayak J.M. Nelson C. Nepali P.K. Netrakanti V.A. Nikitin L.V. Nogach S.B. Nurushev G. Odyniec A. Ogawa V. Okorokov M. Oldenburg D. Olson M. Pachr S.K. Pal Y. Panebratsev S.Y. Panitkin A.I. Pavlinov T. Pawlak T. Peitzmann V. Perevoztchikov C. Perkins W. Peryt S.C. Phatak M. Planinic J. Pluta N. Poljak N. Porile A.M. Poskanzer M. Potekhin E. Potrebenikova B.V.K.S. Potukuchi D. Prindle C. Pruneau J. Putschke I.A. Qattan R. Raniwala S. Raniwala R.L. Ray S.V. Razin J. Reinnarth 1 D. Relyea A. Ridiger H.G. Ritter J.B. Roberts O.V. Rogachevskiy J.L. Romero A. Rose C. Roy 1 L. Ruan M.J. Russcher R. Sahoo I. Sakrejda T. Sakuma S. Salur J. Sandweiss M. Sarsour I. Savin P.S. Sazhin J. Schambach R.P. Scharenberg N. Schmitz J. Seger I. Selyuzhenkov P. Seyboth Alexandre Shabetai E. Shahaliev M. Shao M. Sharma W.Q. Shen S.S. Shimanskiy E. Sichtermann F. Simon R.N. Singaraju N. Smirnov R. Snellings P. Sorensen J. Sowinski J. Speltz 2 H.M. Spinka B. Srivastava A. Stadnik T.D.S. Stanislaus R. Stock M. Strikhanov B. Stringfellow A.A.P. Suaide M.C. Suarez N.L. Subba M. Sumbera X.M. Sun Z. Sun B. Surrow T.J.M. Symons A. Szanto de Toledo J. Takahashi A.H. Tang T. Tarnowsky J.H. Thomas A.R. Timmins S. Timoshenko M. Tokarev T.A. Trainor S. Trentalange R.E. Tribble O.D. Tsai J. Ulery T. Ullrich D.G. Underwood G. van Buren N. van der Kolk M. van Leeuwen A.M. Vander Molen R. Varma I.M. Vasilevski A.N. Vasiliev R. Vernet 2 S.E. Vigdor Y.P. Viyogi S. Vokal S.A. Voloshin W.T. Waggoner F. Wang G. Wang J.S. Wang X.L. Wang Y. Wang J.W. Watson J.C. Webb G.D. Westfall A. Wetzler C. Whitten Jr. H. Wieman S.W. Wissink R. Witt J. Wu N. Xu Q.H. Xu Z. Xu P. Yepes I.-K. Yoo Q. Yue V.I. Yurevich W. Zhan H. Zhang W.M. Zhang Y. Zhang Z.P. Zhang Y. Zhao C. Zhong R. Zoulkarneev Y. Zoulkarneeva A.N. Zubarev J.X. Zuo
Abstract : We study the energy dependence of the transverse momentum $(p_T)$ spectra for charged pions, protons and anti-protons for Au+Au collisions at $\sqrt{S_{NN}$=62.4 and 200 GeV. Data are presented at mid-rapidity (|y|<0.5) for $0.2\le p_T\le12 $ GeV/c . In the intermediate $p_T$ region $(0.2\le p_T\le 6 GeV/c$ ), the nuclear modification factor is higher at 62.4 GeV than at 200 GeV, while at higher $p_T (p_T\ge 7 GeV/c)$ the modification is similar for both energies. The p/$\pi+$ and $\bar{p} \pi^-$ ratios for central collisions at $\sqrt{S_{NN}}$ =62.4 GeV/c peak at $p_t \appeq 2 Gev/c$ . In the $p_T$ range where recombination is expected to dominate, the p/$\pi + ratios at 62.4 GeV are larger than at 200 GeV, while the $\bar{p}$/$\pi _-} ratios are smaller. For $p_T$, the $\bar{p} /\pi_-$ ratios at the two beam energies are independent of $p_T$ and centrality indicating that the dependence of the $\bar{p}:\pi_-$ ratio on $p_T$ does not change between 62.4 and 200 GeV. These findings challenge various models incorporating jet quenching and/or constituent quark coalescence
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http://hal.in2p3.fr/in2p3-00158104
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Submitted on : Thursday, June 28, 2007 - 10:04:42 AM
Last modification on : Thursday, August 6, 2020 - 6:23:56 PM

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B.I. Abelev, M.M. Aggarwal, Z. Ahammed, B.D. Anderson, D. Arkhipkin, et al.. Energy dependence of $\pi^{\pm}$, $p$ and $\bar{p}$ transverse momentum spectra for Au+Au collisions at $\sqrt{s_{NN}}$=62.4 and 200 GeV. Physics Letters B, Elsevier, 2007, 655, pp.104-113. ⟨10.1016/j.physletb.2007.06.035⟩. ⟨in2p3-00158104⟩

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