Correlation measurements between flow harmonics in Au+Au collisions at RHIC
J. AdamCreighton University, Omaha, NE 68178L. AdamczykAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. R. AdamsOhio State University, Columbus, OH 43210J. K. AdkinsUniversity of Kentucky, Lexington, KY 40506-0055G. AgakishievJoint Institute for Nuclear Research, Dubna, 141 980, RussiaM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaN. N. AjitanandStony Brook UniversityI. AlekseevAlikhanov Institute for Theoretical and Experimental Physics, Moscow 117218, RussiaD. M. AndersonTexas A&M University, College Station, TX 77843Y. G.University of Tsukuba, Tsukuba, Ibaraki 305-8571, JapanA. AparinJoint Institute for Nuclear Research, Dubna, 141 980, RussiaD. ArkhipkinBrookhaven National Laboratory, Upton, NY 11973E. C. AschenauerBrookhaven National Laboratory, Upton, NY 11973M. U. AshrafTsinghua University, Beijing 100084F. AtetallaKent State University, Kent, OH 44242A. AttriPanjab University, Chandigarh 160014, IndiaG. S. AverichevJoint Institute for Nuclear Research, Dubna, 141 980, RussiaX. BaiCentral China Normal University, Wuhan, Hubei 430079V. BairathiNational Institute of Science Education and Research, HBNI, Jatni 752050, IndiaK. N. BarishVariable Energy Cyclotron Centre , Kolkata 700064 , IndiaA. J. BassillVariable Energy Cyclotron Centre , Kolkata 700064 , IndiaA. BeheraaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandR. BellwiedaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandA. BhasinaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandA. K. BhatiaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandP. BhattaraiaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. BielčíkCzech Technical University in Prague , FNSPE , Prague , 115 19 , Czech RepublicJ. BielčíkováNuclear Physics Institute AS CR , Prague 250 68 , Czech RepublicL. C. BlandaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandI. G. BordyuzhinAlikhanov Institute for Theoretical and Experimental Physics , Moscow 117218 , RussiaJ. BouchetKent State University , Kent , OH 44242J. D. BrandenburgRice University , Houston , TX 77251A. V. BrandinaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandD. S. BrownaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. BryslawskyjaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandI. BunzarovaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. M. ButterworthaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandH. CainesaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandM. Calderón de la Barca SánchezaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. M. CampbellaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandD. CebraUniversity of California , Davis , CA 95616I. ChakaberiaKent State University , Kent , OH 44242P. ChaloupkaaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandF-H. ChangaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandZ. ChangBrookhaven National Laboratory , Upton , NY 11973N. Chankova-BunzarovaaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandA. ChatterjeeBrookhaven National Laboratory, Upton, NY 11973S. ChattopadhyayaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ.H. ChenaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandX. ChenaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. ChengCreighton University , Omaha , NE 68178M. CherneyCreighton University , Omaha , NE 68178W. ChristieBrookhaven National Laboratory , Upton , NY 11973G. ContinCreighton University , Omaha , NE 68178H. J. CrawfordaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandS. DasCentral China Normal University , Wuhan , Hubei 430079Т. Г. ДедовичaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandI. M. DeppneraAGH University of Science and Technology, FPACS, Cracow 30-059, PolandA. A. DerevschikovCreighton University , Omaha , NE 68178L. DidenkoaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandC. DilksPennsylvania State University , University Park , PA 16802 ah Institute of High Energy Physics , Protvino 142281 , RussiaX. DongaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. L. DrachenbergaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ.C. DunlopaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandL. G. EfimovaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandN. ElseyaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. EngelageUniversity of California , Berkeley , CA 94720G. EppleyaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandR. EshaaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandS. EsumiCreighton University , Omaha , NE 68178O. EvdokimovUniversity of Illinois at Chicago , Chicago , IL 60607 iJ. EwiglebenLehigh University , Bethlehem , PA 18015O. EyseraAGH University of Science and Technology, FPACS, Cracow 30-059, PolandR. FatemiaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandS. FazioBrookhaven National Laboratory , Upton , NY 11973P. FedericAGH University of KrakowP. FederičováaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. FedorišinJoint Institute for Nuclear Research , Dubna , 141 980 , RussiaZ. FengCentral China Normal University , Wuhan , Hubei 430079P. FilipJoint Institute for Nuclear Research , Dubna , 141 980 , RussiaE. FinchaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandY. FisyakaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandC. E. FloresUniversity of California , Davis , CA 95616Ł. FulekAGH University of Science and Technology , FPACS , Cracow 30-059 , PolandC. A. GagliardiaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandF. J. M. GeurtsaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandS. M. GibsonaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandD. GrosnickaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandD. S. GunarathneaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandYu GuoaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandA. GuptaUniversity of Jammu , Jammu 180001 , IndiaW. GurynaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandA. I. HamadaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandA. HamedCreighton University , Omaha , NE 68178A. HarlenderovaaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandJ. W. HarrisLawrence Berkeley National Laboratory , Berkeley , CA 94720L. HeaAGH University of Science and Technology, FPACS, Cracow 30-059, PolandS. HeppelmannUniversity of California , Davis , CA 95616
2018en
ABI
Аннотация
Flow harmonics ( v n ) in the Fourier expansion of the azimuthal distribution of particles are widely used to quantify the anisotropy in particle emission in high-energy heavy-ion collisions. The symmetric cumulants, S C ( m , n ) , are used to measure the correlations between different orders of flow harmonics. These correlations are used to constrain the initial conditions and the transport properties of the medium in theoretical models. In this Letter, we present the first measurements of the four-particle symmetric cumulants in Au+Au collisions at s N N = 39 and 200 GeV from data collected by the STAR experiment at RHIC. We observe that v 2 and v 3 are anti-correlated in all centrality intervals with similar correlation strengths from 39 GeV Au+Au to 2.76 TeV Pb+Pb (measured by the ALICE experiment). The v 2 – v 4 correlation seems to be stronger at 39 GeV than at higher collision energies. The initial-stage anti-correlations between second and third order eccentricities are sufficient to describe the measured correlations between v 2 and v 3 . The best description of v 2 – v 4 correlations at s N N = 200 GeV is obtained with inclusion of the system's nonlinear response to initial eccentricities accompanied by the viscous effect with η / s > 0.08 . Theoretical calculations using different initial conditions, equations of state and viscous coefficients need to be further explored to extract η / s of the medium created at RHIC.
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