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. 2003 Feb 28;90(8):082302.
doi: 10.1103/PhysRevLett.90.082302. Epub 2003 Feb 26.

Disappearance of back-to-back high-pT hadron correlations in central Au+Au collisions at sqrt[s NN ] =200 GeV

C Adler  1 , Z Ahammed, C Allgower, J Amonett, B D Anderson, M Anderson, G S Averichev, J Balewski, O Barannikova, L S Barnby, J Baudot, S Bekele, V V Belaga, R Bellwied, J Berger, H Bichsel, A Billmeier, L C Bland, C O Blyth, B E Bonner, A Boucham, A Brandin, A Bravar, R V Cadman, H Caines, M Calderón de la Barca Sánchez, A Cardenas, J Carroll, J Castillo, M Castro, D Cebra, P Chaloupka, S Chattopadhyay, Y Chen, S P Chernenko, M Cherney, A Chikanian, B Choi, W Christie, J P Coffin, T M Cormier, M M Corral, J G Cramer, H J Crawford, A A Derevschikov, L Didenko, T Dietel, J E Draper, V B Dunin, J C Dunlop, V Eckardt, L G Efimov, V Emelianov, J Engelage, G Eppley, B Erazmus, P Fachini, V Faine, J Faivre, R Fatemi, K Filimonov, E Finch, Y Fisyak, D Flierl, K J Foley, J Fu, C A Gagliardi, N Gagunashvili, J Gans, L Gaudichet, M Germain, F Geurts, V Ghazikhanian, O Grachov, V Grigoriev, M Guedon, E Gushin, T J Hallman, D Hardtke, J W Harris, T W Henry, S Heppelmann, T Herston, B Hippolyte, A Hirsch, E Hjort, G W Hoffmann, M Horsley, H Z Huang, T J Humanic, G Igo, A Ishihara, Yu I Ivanshin, P Jacobs, W W Jacobs, M Janik, I Johnson, P G Jones, E G Judd, M Kaneta, M Kaplan, D Keane, J Kiryluk, A Kisiel, J Klay, S R Klein, A Klyachko, T Kollegger, A S Konstantinov, M Kopytine, L Kotchenda, A D Kovalenko, M Kramer, P Kravtsov, K Krueger, C Kuhn, A I Kulikov, G J Kunde, C L Kunz, R Kh Kutuev, A A Kuznetsov, L Lakehal-Ayat, M A C Lamont, J M Landgraf, S Lange, C P Lansdell, B Lasiuk, F Laue, J Lauret, A Lebedev, R Lednický, V M Leontiev, M J LeVine, Q Li, S J Lindenbaum, M A Lisa, F Liu, L Liu, Z Liu, Q J Liu, T Ljubicic, W J Llope, G LoCurto, H Long, R S Longacre, M Lopez-Noriega, W A Love, T Ludlam, D Lynn, J Ma, D Magestro, R Majka, S Margetis, C Markert, L Martin, J Marx, H S Matis, Yu A Matulenko, T S McShane, F Meissner, Yu Melnick, A Meschanin, M Messer, M L Miller, Z Milosevich, N G Minaev, J Mitchell, C F Moore, V Morozov, M M de Moura, M G Munhoz, J M Nelson, P Nevski, V A Nikitin, L V Nogach, B Norman, S B Nurushev, G Odyniec, A Ogawa, V Okorokov, M Oldenburg, D Olson, G Paic, S U Pandey, Y Panebratsev, S Y Panitkin, A I Pavlinov, T Pawlak, V Perevoztchikov, W Peryt, V A Petrov, M Planinic, J Pluta, N Porile, J Porter, A M Poskanzer, E Potrebenikova, D Prindle, C Pruneau, J Putschke, G Rai, G Rakness, O Ravel, R L Ray, S V Razin, D Reichhold, J G Reid, G Renault, F Retiere, A Ridiger, H G Ritter, J B Roberts, O V Rogachevski, J L Romero, A Rose, C Roy, V Rykov, I Sakrejda, S Salur, J Sandweiss, I Savin, J Schambach, R P Scharenberg, N Schmitz, L S Schroeder, A Schüttauf, K Schweda, J Seger, D Seliverstov, P Seyboth, E Shahaliev, K E Shestermanov, S S Shimanskii, F Simon, G Skoro, N Smirnov, R Snellings, P Sorensen, J Sowinski, H M Spinka, B Srivastava, E J Stephenson, R Stock, A Stolpovsky, M Strikhanov, B Stringfellow, C Struck, A A P Suaide, E Sugarbaker, C Suire, M Sumbera, B Surrow, T J M Symons, A Szanto de Toledo, P Szarwas, A Tai, J Takahashi, A H Tang, D Thein, J H Thomas, M Thompson, V Tikhomirov, M Tokarev, M B Tonjes, T A Trainor, S Trentalange, R E Tribble, V Trofimov, O Tsai, T Ullrich, D G Underwood, G Van Buren, A M VanderMolen, I M Vasilevski, A N Vasiliev, S E Vigdor, S A Voloshin, F Wang, H Ward, J W Watson, R Wells, G D Westfall, C Whitten Jr, H Wieman, R Willson, S W Wissink, R Witt, J Wood, N Xu, Z Xu, A E Yakutin, E Yamamoto, J Yang, P Yepes, V I Yurevich, Y V Zanevski, I Zborovský, H Zhang, W M Zhang, R Zoulkarneev, A N Zubarev
Affiliations

Disappearance of back-to-back high-pT hadron correlations in central Au+Au collisions at sqrt[s NN ] =200 GeV

C Adler et al. Phys Rev Lett. .

Abstract

Azimuthal correlations for large transverse momentum charged hadrons have been measured over a wide pseudorapidity range and full azimuth in Au+Au and p+p collisions at sqrt[s(NN)]=200 GeV. The small-angle correlations observed in p+p collisions and at all centralities of Au+Au collisions are characteristic of hard-scattering processes previously observed in high-energy collisions. A strong back-to-back correlation exists for p+p and peripheral Au+Au. In contrast, the back-to-back correlations are reduced considerably in the most central Au+Au collisions, indicating substantial interaction as the hard-scattered partons or their fragmentation products traverse the medium.

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