Measurement of Nonrandom Event-by-Event Fluctuations of Average Transverse Momentum in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn><mml:mtext> </mml:mtext><mml:mi mathvariant="normal">G</mml:mi><mml:mi mathvariant="normal">e</mml:mi><mml:mi mathvariant="normal">V</mml:mi></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">A</mml:mi><mml:mi mathvariant="normal">u</mml:mi><mml:mo>+</mml:mo><mml:mi mathvariant="normal">A</mml:mi><mml:mi mathvariant="normal">u</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:mi>p</mml:mi></mml:math>Collisions
Stephen AdlerBrookhaven National Laboratory, Upton, New York 11973-5000, USAS. AfanasievJoint Institute for Nuclear Research, 141980 Dubna, Moscow Region, RussiaC. AidalaBrookhaven National Laboratory, Upton, New York 11973-5000, USAN. N. AjitanandChemistry Department, Stony Brook University, SUNY, Stony Brook, New York 11794-3400, USAY. AkibaKEK, High Energy Accelerator Research Organization, Tsukuba-shi, Ibaraki-ken 305-0801, JapanJ. AlexanderChemistry Department, Stony Brook University, SUNY, Stony Brook, New York 11794-3400, USAR. AmirikasFlorida State University, Tallahassee, Florida 32306, USAL. AphecetcheSUBATECH (Ecole des Mines de Nantes, CNRS-IN2P3, Université de Nantes) BP 20722 - 44307, Nantes, FranceS. H. AronsonBrookhaven National Laboratory, Upton, New York 11973-5000, USAR. AverbeckDepartment of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USAT. C. AwesOak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAR. AzmounDepartment of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USAV. BabintsevInstitute for High Energy Physics (IHEP), Protvino, RussiaA. BaldisseriDapnia, CEA Saclay, F-91191, Gif-sur-Yvette, FranceK. N. BarishUniversity of California - Riverside, Riverside, California 92521, USAP. D. BarnesLos Alamos National Laboratory, Los Alamos, New Mexico 87545, USAB. BassalleckUniversity of New Mexico, Albuquerque, New Mexico, USAS. BatheInstitut für Kernphysik, University of Muenster, D-48149 Muenster, GermanyS. BatsouliColumbia University, New York, New York 10027 and Nevis Laboratories, Irvington, New York 10533, USAV. BaublisPNPI, Petersburg Nuclear Physics Institute, Gatchina, RussiaA. BazilevskyInstitute for High Energy Physics (IHEP), Protvino, RussiaS. BelikovInstitute for High Energy Physics (IHEP), Protvino, RussiaY. BerdnikovS. BhagavatulaIowa State University, Ames, Iowa 50011, USAJ. G. BoissevainLos Alamos National Laboratory, Los Alamos, New Mexico 87545, USAH. BorelDapnia, CEA Saclay, F-91191, Gif-sur-Yvette, FranceS. BorensteinLaboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS-IN2P3, Route de Saclay, F-91128, Palaiseau, FranceM. L. BrooksLos Alamos National Laboratory, Los Alamos, New Mexico 87545, USAD. S. BrownNew Mexico State University, Las Cruces, New Mexico 88003, USAN. BrunerUniversity of New Mexico, Albuquerque, New Mexico, USAD. BucherInstitut für Kernphysik, University of Muenster, D-48149 Muenster, GermanyH. BueschingInstitut für Kernphysik, University of Muenster, D-48149 Muenster, GermanyV. BumazhnovInstitute for High Energy Physics (IHEP), Protvino, RussiaG. BunceBrookhaven National Laboratory, Upton, New York 11973-5000, USAJ. M. Burward-HoyDepartment of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USAS. ButsykDepartment of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USAX. CamardSUBATECH (Ecole des Mines de Nantes, CNRS-IN2P3, Université de Nantes) BP 20722 - 44307, Nantes, FranceJ.-S. ChaiKAERI, Cyclotron Application Laboratory, Seoul, South KoreaP. ChandBhabha Atomic Research Centre, Bombay 400 085, IndiaW. C. ChangInstitute of Physics, Academia Sinica, Taipei 11529, TaiwanS. ChernichenkoInstitute for High Energy Physics (IHEP), Protvino, RussiaC. Y.Columbia University, New York, New York 10027 and Nevis Laboratories, Irvington, New York 10533, USAJ. ChibaKEK, High Energy Accelerator Research Organization, Tsukuba-shi, Ibaraki-ken 305-0801, JapanM. ChiuColumbia University, New York, New York 10027 and Nevis Laboratories, Irvington, New York 10533, USAI. J. ChoiYonsei University, IPAP, Seoul 120-749, KoreaJ. B. ChoiKangnung National University, Kangnung 210-702, South KoreaR. K. ChoudhuryBhabha Atomic Research Centre, Bombay 400 085, IndiaT. ChujoBrookhaven National Laboratory, Upton, New York 11973-5000, USAV. CiancioloOak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAY. CobigoDapnia, CEA Saclay, F-91191, Gif-sur-Yvette, FranceB. A. ColeColumbia University, New York, New York 10027 and Nevis Laboratories, Irvington, New York 10533, USAP. ConstantinIowa State University, Ames, Iowa 50011, USAD. d’EnterriaSUBATECH (Ecole des Mines de Nantes, CNRS-IN2P3, Université de Nantes) BP 20722 - 44307, Nantes, FranceG. DavidBrookhaven National Laboratory, Upton, New York 11973-5000, USAH. DelagrangeSUBATECH (Ecole des Mines de Nantes, CNRS-IN2P3, Université de Nantes) BP 20722 - 44307, Nantes, FranceA. DenisovInstitute for High Energy Physics (IHEP), Protvino, RussiaA. DeshpandeRIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USAE. J. DesmondBrookhaven National Laboratory, Upton, New York 11973-5000, USAO. DietzschUniversidade de São Paulo, Instituto de Física, Caixa Postal 66318, São Paulo CEP05315-970, BrazilO. DrapierLaboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS-IN2P3, Route de Saclay, F-91128, Palaiseau, FranceA. DreesDepartment of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USAR. du RietzDepartment of Physics, Lund University, Box 118, SE-221 00 Lund, SwedenA. DurumInstitute for High Energy Physics (IHEP), Protvino, RussiaDipanwita DuttaBhabha Atomic Research Centre, Bombay 400 085, IndiaY. V. EfremenkoOak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USAK. El ChenawiVanderbilt University, Nashville, Tennessee 37235, USAA. EnokizonoHiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, JapanH. En’yoRIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198, JapanS. EsumiInstitute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305, JapanL. EwellBrookhaven National Laboratory, Upton, New York 11973-5000, USAD. E. FieldsRIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USAF. FleuretLaboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS-IN2P3, Route de Saclay, F-91128, Palaiseau, FranceS. FokinRussian Research Center “Kurchatov Institute,” Moscow, RussiaB. D. FoxRIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USAZ. FraenkelWeizmann Institute, Rehovot 76100, IsraelJ. E. FrantzColumbia University, New York, New York 10027 and Nevis Laboratories, Irvington, New York 10533, USAA. FranzBrookhaven National Laboratory, Upton, New York 11973-5000, USAA. D. FrawleyFlorida State University, Tallahassee, Florida 32306, USAS.-Y. FungUniversity of California - Riverside, Riverside, California 92521, USAS. GarpmanDepartment of Physics, Lund University, Box 118, SE-221 00 Lund, SwedenTarun Kanti GhoshVanderbilt University, Nashville, Tennessee 37235, USAA. GlennUniversity of Tennessee, Knoxville, Tennessee 37996, USAG. GogiberidzeUniversity of Tennessee, Knoxville, Tennessee 37996, USAM. GoninLaboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS-IN2P3, Route de Saclay, F-91128, Palaiseau, FranceJ. GössetDapnia, CEA Saclay, F-91191, Gif-sur-Yvette, FranceY. GotoRIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USAR. Granier de CassagnacLaboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS-IN2P3, Route de Saclay, F-91128, Palaiseau, FranceN. GrauIowa State University, Ames, Iowa 50011, USAS. V. GreeneVanderbilt University, Nashville, Tennessee 37235, USAM. Große PerdekampRIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USAW. GurynBrookhaven National Laboratory, Upton, New York 11973-5000, USAH.-Å. GustafssonDepartment of Physics, Lund University, Box 118, SE-221 00 Lund, SwedenT. HachiyaHiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, JapanJ. S. HaggertyBrookhaven National Laboratory, Upton, New York 11973-5000, USAH. HamagakiCenter for Nuclear Study, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, JapanA. G. HansenLos Alamos National Laboratory, Los Alamos, New Mexico 87545, USAE. P. HartouniLawrence Livermore National Laboratory, Livermore, California 94550, USAM. HarveyBrookhaven National Laboratory, Upton, New York 11973-5000, USAR. HayanoCenter for Nuclear Study, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, JapanX. HeGeorgia State University, Atlanta, Georgia 30303, USA
2004lv
ABI
Abstract
Event-by-event fluctuations of the average transverse momentum of produced particles near midrapidity have been measured by the PHENIX Collaboration in square root of (sNN)=200 GeV Au+Au, and p+p collisions at the Relativistic Heavy Ion Collider. The fluctuations are observed to be in excess of the expectation for statistically independent particle emission for all centralities. The excess fluctuations exhibit a dependence on both the centrality of the collision and on the pT range over which the average is calculated. Both the centrality and pT dependence can be well reproduced by a simulation of random particle production with the addition of contributions from hard-scattering processes.
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Cited by 20 references