Статья

Inclusive charged hadron elliptic flow in Au<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:math>Au collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><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>7.7</mml:mn></mml:mrow></mml:math>–39 GeV

L. AdamczykAGH University of Science and Technology, Cracow, PolandG. AgakishievJoint Institute for Nuclear Research, Dubna 141 980, RussiaM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaA. V. AlakhverdyantsJoint Institute for Nuclear Research, Dubna 141 980, RussiaI. AlekseevAlikhanov Institute for Theoretical and Experimental Physics, Moscow, RussiaJ. AlfordKent State University, Kent, Ohio 44242, USAB. D. AndersonKent State University, Kent, Ohio 44242, USAC. AnsonOhio State University, Columbus, Ohio 43210, USAD. ArkhipkinBrookhaven National Laboratory, Upton, New York 11973, USAE. C. AschenauerBrookhaven National Laboratory, Upton, New York 11973, USAG. S. AverichevJoint Institute for Nuclear Research, Dubna 141 980, RussiaJ. BalewskiMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAA. BanerjeeVariable Energy Cyclotron Centre, Kolkata 700064, IndiaZ. BarnovskaNuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech RepublicD. R. BeavisBrookhaven National Laboratory, Upton, New York 11973, USAR. BellwiedUniversity of Houston, Houston, Texas 77204, USAM. BetancourtMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAR. R. BettsUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAA. BhasinUniversity of Jammu, Jammu 180001, IndiaA. K. BhatiPanjab University, Chandigarh 160014, IndiaH. BichselUniversity of Washington, Seattle, Washington 98195, USAJ. BielčíkCzech Technical University in Prague, FNSPE, Prague 115 19, Czech RepublicJ. BielčíkováNuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech RepublicL. C. BlandBrookhaven National Laboratory, Upton, New York 11973, USAI. G. BordyuzhinAlikhanov Institute for Theoretical and Experimental Physics, Moscow, RussiaW. BorowskiSUBATECH, Nantes, FranceJ. BouchetKent State University, Kent, Ohio 44242, USAA. V. BrandinMoscow Engineering Physics Institute, Moscow RussiaS. G. BrovkoUniversity of California, Davis, California 95616, USAE. BrunaYale University, New Haven, Connecticut 06520, USAS. BültmannOld Dominion University, Norfolk, Virginia 23529, USAI. BunzarovJoint Institute for Nuclear Research, Dubna 141 980, RussiaT. P. BurtonBrookhaven National Laboratory, Upton, New York 11973, USAJ. M. ButterworthRice University, Houston, Texas 77251, USAX. Z. CaiShanghai Institute of Applied Physics, Shanghai 201800, ChinaH. CainesYale University, New Haven, Connecticut 06520, USAM. Calderón de la Barca SánchezUniversity of California, Davis, California 95616, USAD. CebraUniversity of California, Davis, California 95616, USAR. CendejasUniversity of California, Los Angeles, California 90095, USAM. C. CervantesTexas A&M University, College Station, Texas 77843, USAP. ChaloupkaNuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech RepublicZ. ChangTexas A&M University, College Station, Texas 77843, USAS. ChattopadhyayVariable Energy Cyclotron Centre, Kolkata 700064, IndiaH. F. ChenUniversity of Science & Technology of China, Hefei 230026, ChinaJ. H. ChenCentral China Normal University (HZNU), Wuhan 430079, ChinaJ. Y. ChenCentral China Normal University (HZNU), Wuhan 430079, ChinaL. ChenCentral China Normal University (HZNU), Wuhan 430079, ChinaJ. ChengTsinghua University, Beijing 100084, ChinaM. CherneyCreighton University, Omaha, Nebraska 68178, USAA. ChikanianYale University, New Haven, Connecticut 06520, USAW. ChristieBrookhaven National Laboratory, Upton, New York 11973, USAP. ChungNuclear Physics Institute AS CR, 250 68 Řež/Prague, Czech RepublicJ. J. ChwastowskiCracow University of Technology, Cracow, PolandM. J. M. CodringtonTexas A&M University, College Station, Texas 77843, USAR. CorlissMassachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USAJ. G. CramerUniversity of Washington, Seattle, Washington 98195, USAH. J. CrawfordUniversity of California, Berkeley, California 94720, USAX.Y. CuiUniversity of Science & Technology of China, Hefei 230026, ChinaA. Davila LeyvaUniversity of Texas, Austin, Texas 78712, USAL. C. De SilvaUniversity of Houston, Houston, Texas 77204, USAR. R. DebbeBrookhaven National Laboratory, Upton, New York 11973, USAT. G. DedovichJoint Institute for Nuclear Research, Dubna 141 980, RussiaJ. DengShandong University, Jinan, Shandong 250100, ChinaR. Derradi de SouzaUniversidade Estadual de Campinas, Sao Paulo, BrazilS. DhamijaIndiana University, Bloomington, Indiana 47408, USAL. DidenkoBrookhaven National Laboratory, Upton, New York 11973, USAF. DingUniversity of California, Davis, California 95616, USAA. DionBrookhaven National Laboratory, Upton, New York 11973, USAP. DjawothoTexas A&M University, College Station, Texas 77843, USAX. DongLawrence Berkeley National Laboratory, Berkeley, California 94720, USAJ. L. DrachenbergTexas A&M University, College Station, Texas 77843, USAJ. E. DraperUniversity of California, Davis, California 95616, USAC. M. DuInstitute of Modern Physics, Lanzhou, ChinaL. E. DunkelbergerUniversity of California, Los Angeles, California 90095, USAJ. C. DunlopBrookhaven National Laboratory, Upton, New York 11973, USAL. G. EfimovJoint Institute for Nuclear Research, Dubna 141 980, RussiaM. ElnimrWayne State University, Detroit, Michigan 48201, USAJ. EngelageUniversity of California, Berkeley, California 94720, USAG. EppleyRice University, Houston, Texas 77251, USAL. EunLawrence Berkeley National Laboratory, Berkeley, California 94720, USAO. EvdokimovUniversity of Illinois at Chicago, Chicago, Illinois 60607, USAR. FatemiUniversity of Kentucky, Lexington, Kentucky 40506-0055, USAS. FazioBrookhaven National Laboratory, Upton, New York 11973, USAJ. FedorišinJoint Institute for Nuclear Research, Dubna 141 980, RussiaR. G. FerschUniversity of Kentucky, Lexington, Kentucky 40506-0055, USAP. FilipJoint Institute for Nuclear Research, Dubna 141 980, RussiaE. FinchYale University, New Haven, Connecticut 06520, USAY. FisyakBrookhaven National Laboratory, Upton, New York 11973, USAC. A. GagliardiTexas A&M University, College Station, Texas 77843, USAD. R. GangadharanOhio State University, Columbus, Ohio 43210, USAF. J. M. GeurtsRice University, Houston, Texas 77251, USAS. M. GibsonValparaiso University, Valparaiso, Indiana 46383, USAS. GliskeArgonne National Laboratory, Argonne, Illinois 60439, USAY. N. GorbunovCreighton University, Omaha, Nebraska 68178, USAO. G. GrebenyukLawrence Berkeley National Laboratory, Berkeley, California 94720, USAD. GrosnickValparaiso University, Valparaiso, Indiana 46383, USAS. K. GuptaUniversity of Jammu, Jammu 180001, IndiaW. GurynBrookhaven National Laboratory, Upton, New York 11973, USAB. HaagUniversity of California, Davis, California 95616, USA

2012lv

ABI

Аннотация

A systematic study is presented for centrality, transverse momentum (${p}_{T}$), and pseudorapidity ($\ensuremath{\eta}$) dependence of the inclusive charged hadron elliptic flow (${v}_{2}$) at midrapidity ($|\ensuremath{\eta}|<1.0$) in $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{NN}}=7.7$, 11.5, 19.6, 27, and 39 GeV. The results obtained with different methods, including correlations with the event plane reconstructed in a region separated by a large pseudorapidity gap and four-particle cumulants (${v}_{2}{4}$), are presented to investigate nonflow correlations and ${v}_{2}$ fluctuations. We observe that the difference between ${v}_{2}{2}$ and ${v}_{2}{4}$ is smaller at the lower collision energies. Values of ${v}_{2}$, scaled by the initial coordinate space eccentricity, ${v}_{2}/\ensuremath{\varepsilon}$, as a function of ${p}_{T}$ are larger in more central collisions, suggesting stronger collective flow develops in more central collisions, similar to the results at higher collision energies. These results are compared to measurements at higher energies at the Relativistic Heavy Ion Collider ($\sqrt{{s}_{NN}}=62.4$ and 200 GeV) and at the Large Hadron Collider ($\mathrm{Pb}+\mathrm{Pb}$ collisions at $\sqrt{{s}_{NN}}=2.76$ TeV). The ${v}_{2}({p}_{T})$ values for fixed ${p}_{T}$ rise with increasing collision energy within the ${p}_{T}$ range studied ($<$$2\phantom{\rule{0.28em}{0ex}}\mathrm{GeV}/c$). A comparison to viscous hydrodynamic simulations is made to potentially help understand the energy dependence of ${v}_{2}({p}_{T})$. We also compare the ${v}_{2}$ results to UrQMD and AMPT transport model calculations, and physics implications on the dominance of partonic versus hadronic phases in the system created at beam energy scan energies are discussed.

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Идентификаторы

DOI: 10.1103/physrevc.86.054908

Цитирования и источники

Цитирований: 2Использованных источников: 0

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