Parton energy loss in heavy-ion collisions via direct-photon and charged-particle azimuthal correlations

Autoria(s): ABELEV, B. I.; AGGARWAL, M. M.; AHAMMED, Z.; ALAKHVERDYANTS, A. V.; ANDERSON, B. D.; ARKHIPKIN, D.; AVERICHEV, G. S.; BALEWSKI, J.; BARANNIKOVA, O.; BARNBY, L. S.; BAUDOT, J.; BAUMGART, S.; BEAVIS, D. R.; BELLWIED, R.; BENEDOSSO, F.; BETANCOURT, M. J.; BETTS, R. R.; BHASIN, A.; BHATI, A. K.; BICHSEL, H.; BIELCIK, J.; BIELCIKOVA, J.; BIRITZ, B.; BLAND, L. C.; BNZAROV, I.; BOMBARA, M.; BONNER, B. E.; BOUCHET, J.; BRAIDOT, E.; BRANDIN, A. V.; BRUNA, E.; BUELTMANN, S.; BURTON, T. P.; BYSTERSKY, M.; CAI, X. Z.; CAINES, H.; SANCHEZ, M. Calderon de la Barca; CATU, O.; CEBRA, D.; CENDEJAS, R.; CERVANTES, M. C.; CHAJECKI, Z.; CHALOUPKA, P.; CHATTOPADHYAY, S.; CHEN, H. F.; CHEN, J. H.; CHEN, J. Y.; CHENG, J.; CHERNEY, M.; CHIKANIAN, A.; CHOI, K. E.; CHRISTIE, W.; CLARKE, R. F.; CODRINGTON, M. J. M.; CORLISS, R.; CORMIER, T. M.; Cosentino, Mauro Rogerio; CRAMER, J. G.; CRAWFORD, H. J.; DAS, D.; DASH, S.; DAUGHERITY, M.; SILVA, L. C. De; DEDOVICH, T. G.; DEPHILLIPS, M.; DEREVSCHIKOV, A. A.; SOUZA, R. Derradi de; DIDENKO, L.; DJAWOTHO, P.; DOGRA, S. M.; DONG, X.; DRACHENBERG, J. L.; DRAPER, J. E.; DUNLOP, J. C.; MAZUMDAR, M. R. Dutta; EFIMOV, L. G.; ELHALHULI, E.; ELNIMR, M.; ENGELAGE, J.; EPPLEY, G.; ERAZMUS, B.; ESTIENNE, M.; EUN, L.; FACHINI, P.; FATEMI, R.; FEDORISIN, J.; FENG, A.; FILIP, P.; FINCH, E.; FINE, V.; FISYAK, Y.; GAGLIARDI, C. A.; GAILLARD, L.; GANGADHARAN, D. R.; GANTI, M. S.; GARCIA-SOLIS, E. J.; GEROMITSOS, A.; GEURTS, F.; GHAZIKHANIAN, V.; GHOSH, P.; GORBUNOV, Y. N.; GORDON, A.; GREBENYUK, O.; GROSNICK, D.; GRUBE, B.; GUERTIN, S. M.; Guimarães, Karin Silvia Franzoni Fornazier; GUPTA, A.; GUPTA, N.; GURYN, W.; HAAG, B.; HALLMAN, T. J.; HAMED, A.; HARRIS, J. W.; HE, W.; HEINZ, M.; HEPPELMANN, S.; HIPPOLYTE, B.; HIRSCH, A.; HJORT, E.; HOFFMAN, A. M.; HOFFMANN, G. W.; HOFMAN, D. J.; HOLLIS, R. S.; HUANG, H. Z.; HUMANIC, T. J.; HUO, L.; IGO, G.; IORDANOVA, A.; JACOBS, P.; JACOBS, W. W.; JAKL, P.; JENA, C.; JIN, F.; JONES, C. L.; JONES, P. G.; JOSEPH, J.; JUDD, E. G.; KABANA, S.; KAJIMOTO, K.; KANG, K.; KAPITAN, J.; KAUDER, K.; KEANE, D.; KECHECHYAN, A.; KETTLER, D.; KHODYREV, V. Yu.; KIKOLA, D. P.; KIRYLUK, J.; KISIEL, A.; KLEIN, S. R.; KNOSPE, A. G.; KOCOLOSKI, A.; KOETKE, D. D.; KONZER, J.; KOPYTINE, M.; KORALT, I.; KORSCH, W.; KOTCHENDA, L.; KOUCHPIL, V.; KRAVTSOV, P.; KRAVTSOV, V. I.; KRUEGER, K.; KRUS, M.; KUHN, C.; KUMAR, L.; KURNADI, P.; LAMONT, M. A. C.; LANDGRAF, J. M.; LAPOINTE, S.; LAURET, J.; LEBEDEV, A.; LEDNICKY, R.; LEE, C-H.; LEE, J. H.; LEIGHT, W.; LEVINE, M. J.; LI, C.; LI, N.; LI, Y.; LIN, G.; LINDENBAUM, S. J.; LISA, M. A.; LIU, F.; LIU, H.; LIU, J.; LIU, L.; LJUBICIC, T.; LLOPE, W. J.; LONGACRE, R. S.; LOVE, W. A.; LU, Y.; LUDLAM, T.; MA, G. L.; MA, Y. G.; MAHAPATRA, D. P.; MAJKA, R.; MALL, O. I.; MANGOTRA, L. K.; MANWEILER, R.; MARGETIS, S.; MARKERT, C.; MASUI, H.; MATIS, H. S.; MATULENKO, Yu. A.; MCDONALD, D.; MCSHANE, T. S.; MESCHANIN, A.; MILNER, R.; MINAEV, N. G.; MIODUSZEWSKI, S.; MISCHKE, A.; MOHANTY, B.; MOROZOV, D. A.; Munhoz, Marcelo Gameiro; NANDI, B. K.; NATTRASS, C.; NAYAK, T. K.; NELSON, J. M.; NETRAKANTI, P. K.; NG, M. J.; NOGACH, L. V.; NURUSHEV, S. B.; ODYNIEC, G.; OGAWA, A.; OKADA, H.; OKOROKOV, V.; OLSON, D.; PACHR, M.; PAGE, B. S.; PAL, S. K.; PANDIT, Y.; PANEBRATSEV, Y.; PAWLAK, T.; PEITZMANN, T.; PEREVOZTCHIKOV, V.; PERKINS, C.; PERYT, W.; PHATAK, S. C.; PILE, P.; PLANINIC, M.; PLOSKON, M. A.; PLUTA, J.; PLYKU, D.; POLJAK, N.; POSKANZER, A. M.; POTUKUCHI, B. V. K. S.; PRINDLE, D.; PRUNEAU, C.; PRUTHI, N. K.; PUJAHARI, P. R.; PUTSCHKE, J.; RANIWALA, R.; RANIWALA, S.; RAY, R. L.; REDWINE, R.; REED, R.; RIDIGER, A.; RITTER, H. G.; ROBERTS, J. B.; ROGACHEVSKIY, O. V.; ROMERO, J. L.; ROSE, A.; ROY, C.; RUAN, L.; RUSSCHER, M. J.; SAHOO, R.; SAKAI, S.; SAKREJDA, I.; SAKUMA, T.; SALUR, S.; SANDWEISS, J.; SARSOUR, M.; SCHAMBACH, J.; SCHARENBERG, R. P.; SCHMITZ, N.; SEGER, J.; SELYUZHENKOV, I.; SEYBOTH, P.; SHABETAI, A.; SHAHALIEV, E.; SHAO, M.; SHARMA, M.; SHI, S. S.; SHI, X-H.; SICHTERMANN, E. P.; SIMON, F.; SINGARAJU, R. N.; SKOBY, M. J.; SMIRNOV, N.; SORENSEN, P.; SOWINSKI, J.; SPINKA, H. M.; SRIVASTAVA, B.; STANISLAUS, T. D. S.; STASZAK, D.; STRIKHANOV, M.; STRINGFELLOW, B.; Suaide, Alexandre Alarcon do Passo; SUAREZ, M. C.; SUBBA, N. L.; SUMBERA, M.; SUN, X. M.; SUN, Y.; SUN, Z.; SURROW, B.; SYMONS, T. J. M.; Szanto de Toledo, Alejandro; TAKAHASHI, J.; TANG, A. H.; TANG, Z.; TARINI, L. H.; TARNOWSKY, T.; THEIN, D.; THOMAS, J. H.; TIAN, J.; TIMMINS, A. R.; TIMOSHENKO, S.; TLUSTY, D.; TOKAREV, M.; TRAINOR, T. A.; TRAM, V. N.; TRENTALANGE, S.; TRIBBLE, R. E.; TSAI, O. D.; ULERY, J.; ULLRICH, T.; UNDERWOOD, D. G.; BUREN, G. Van; NIEUWENHUIZEN, G. van; VANFOSSEN JR., J. A.; VARMA, R.; VASCONCELOS, G. M. S.; VASILIEV, A. N.; VIDEBAEK, F.; VIGDOR, S. E.; VIYOGI, Y. P.; VOKAL, S.; VOLOSHIN, S. A.; WADA, M.; WALKER, M.; WANG, F.; WANG, G.; WANG, H.; WANG, J. S.; WANG, Q.; WANG, X.; WANG, X. L.; WANG, Y.; WEBB, G.; WEBB, J. C.; WESTFALL, G. D.; WHITTEN JR., C.; WIEMAN, H.; WISSINK, S. W.; WITT, R.; WU, Y.; XIE, W.; XU, N.; XU, Q. H.; XU, Y.; XU, Z.; YANG, Y.; YEPES, P.; YIP, K.; YOO, I-K.; YUE, Q.; ZAWISZA, M.; ZBROSZCZYK, H.; ZHAN, W.; ZHANG, S.; ZHANG, W. M.; ZHANG, X. P.; ZHANG, Y.; ZHANG, Z. P.; ZHAO, Y.; ZHONG, C.; ZHOU, J.; ZHU, X.; ZOULKARNEEV, R.; ZOULKARNEEVA, Y.; ZUO, J. X.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO
Data(s)

18/04/2012

18/04/2012

2010
Resumo

Charged-particle spectra associated with direct photon (gamma(dir)) and pi(0) are measured in p + p and Au + Au collisions at center-of-mass energy root(S)(NN) = 200 GeV with the STAR detector at the Relativistic Heavy Ion Collider. A shower-shape analysis is used to partially discriminate between gamma(dir) and pi(0). Assuming no associated charged particles in the gamma(dir) direction ( near side) and small contribution from fragmentation photons (gamma(frag)), the associated charged-particle yields opposite to gamma(dir) (away side) are extracted. In central Au + Au collisions, the charged-particle yields at midrapidity (vertical bar eta vertical bar < 1) and high transverse momentum (3 < (assoc)(PT) < 16 GeV/c) associated with gamma(dir) and pi(0) (vertical bar eta vertical bar < 0.9, 8 < (trig)(PT) < 16 GeV/c) are suppressed by a factor of 3-5 compared with p + p collisions. The observed suppression of the associated charged particles is similar for gamma(dir) and pi(0) and independent of the gamma(dir) energy within uncertainties. These measurements indicate that, in the kinematic range covered and within our current experimental uncertainties, the parton energy loss shows no sensitivity to the parton initial energy, path length, or color charge.

RHIC Operations Group

RCF at BNL

NERSC Center at LBNL

Open Science Grid consortium

Office of NP within US DOE Office of Science

Office of HEP within US DOE Office of Science

US NSF National Science Foundation

Sloan Foundation

Deutsche Forschungsgemeinschaft - DFG

STFC

EPSRC of the United Kingdom

FAPESP CNPq of Brazil

MES Ministry of Education and Science of the Russian Federation

National Natural Science Foundation of China (NNSFC)

CAS of China

MoST of China

MoE of China

GACR of the Czech Republic

MSMT of the Czech Republic

FOM of the Netherlands

NWO of the Netherlands

(DAE) Department of Atomic Energy, India

(DST) Department of Science and Technology, India

(CSIR) Council of Scientific and Industrial Research - India

Polish Ministry of Science and Higher Education

Korea Research Foundation (KRF)

Ministry of Science, Education, and Sports of the Republic of Croatia

MES Russian Ministry of Science and Technology

RosAtom of Russia

Centre National de la Recherche Scientifique [CNRS/IN2P3]
Identificador

PHYSICAL REVIEW C, v.82, n.3, 2010

0556-2813

http://producao.usp.br/handle/BDPI/16292

10.1103/PhysRevC.82.034909

http://dx.doi.org/10.1103/PhysRevC.82.034909
Idioma(s)

eng
Publicador

AMER PHYSICAL SOC
Relação

Physical Review C
Direitos

restrictedAccess

Copyright AMER PHYSICAL SOC
Palavras-Chave #QUARK-GLUON PLASMA #JET TOMOGRAPHY #Physics, Nuclear
Tipo

article

original article

publishedVersion
Acesso ao item digital