Light nuclei collectivity from s NN = 3 GeV Au+Au collisions at RHIC
M. S. AbdallahAmerican University of Cairo, New Cairo 11835, New Cairo, EgyptB. E. AboonaTexas A&M University, College Station, TX 77843J. AdamBrookhaven National Laboratory, Upton, NY 11973L. 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, RussiaI. AggarwalPanjab University, Chandigarh 160014, IndiaM. M. AggarwalPanjab University, Chandigarh 160014, IndiaZ. AhammedVariable Energy Cyclotron Centre, Kolkata 700064, IndiaA. AitbaevJoint Institute for Nuclear Research, Dubna 141 980, RussiaI. AlekseevAlikhanov Institute for Theoretical and Experimental Physics NRC “Kurchatov Institute”, Moscow 117218, RussiaD. M. AndersonTexas A&M University, College Station, TX 77843A. AparinJoint Institute for Nuclear Research, Dubna 141 980, RussiaE. C. AschenauerBrookhaven National Laboratory, Upton, NY 11973M. U. AshrafCentral China Normal University, Wuhan, Hubei 430079F. G. AtetallaKent State University, Kent, OH 44242G. S. AverichevJoint Institute for Nuclear Research, Dubna 141 980, RussiaV. BairathiInstituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, ChileW. BakerUniversity of California, Riverside, CA 92521J. BallUniversity of Houston , Houston , TX 77204K. N. BarishUniversity of California , Riverside , CA 92521 lA. BeheraSouthern Connecticut State University , New Haven , CT 06515R. BellwiedUniversity of California, Riverside, CA 92521P. BhagatJoint Institute for Nuclear Research, Dubna 141 980, RussiaA. BhasinUniversity of Jammu, Jammu 180001, IndiaJ. BielčíkUniversity of Kentucky, Lexington, KY 40506-0055J. BielčíkováUniversity of Kentucky, Lexington, KY 40506-0055I. G. BordyuzhinAlikhanov Institute for Theoretical and Experimental Physics NRC "Kurchatov Institute" , Moscow 117218 , RussiaJ. D. BrandenburgBrookhaven National Laboratory , Upton , NY 11973A. V. BrandinJoint Institute for Nuclear Research, Dubna 141 980, RussiaX. Z. CaiShanghai Institute of Applied PhysicsH. CainesMichigan State University , East Lansing , MI 48824M. Calderón de la Barca SánchezSouthern Connecticut State University , New Haven , CT 06515D. CebraTexas A&M University, College Station, TX 77843I. ChakaberiaInstituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, ChileP. ChaloupkaSouthern Connecticut State University , New Haven , CT 06515B. K. ChanUniversity of California , Los Angeles , CA 90095F-H. ChangNational Cheng Kung University, Tainan 70101Z. ChangVariable Energy Cyclotron Centre, Kolkata 700064, IndiaA. ChatterjeeSouthern Connecticut State University , New Haven , CT 06515S. ChattopadhyayKent State University , Kent , OH 44242D. ChenUniversity of California , Riverside , CA 92521 lJian ChenShandong University , Qingdao , Shandong 266237J.H. ChenBrookhaven National Laboratory, Upton, NY 11973X. ChenUniversity of California , Davis , CA 95616Z. ChenShandong University , Qingdao , Shandong 266237J. ChengUniversity of Kentucky, Lexington, KY 40506-0055S. ChoudhuryFudan University , Shanghai , 200433W. ChristieUniversity of California, Riverside, CA 92521X. ChuBrookhaven National Laboratory , Upton , NY 11973H. J. CrawfordUniversity of California , Berkeley , CA 94720 iM. CsanádCentral China Normal University, Wuhan, Hubei 430079M. DaugherityAbilene Christian University , Abilene , TX 79699T. G. DedovichJoint Institute for Nuclear Research, Dubna 141 980, RussiaI. M. DeppnerUniversity of Heidelberg, Heidelberg 69120, GermanyA. A. DerevschikovUniversity of California, DavisA. DhamijaPanjab University, Chandigarh 160014, IndiaL. Di CarloKent State University, Kent, OH 44242L. DidenkoBrookhaven National Laboratory , Upton , NY 11973P. DixitJoint Institute for Nuclear Research, Dubna 141 980, RussiaX. DongLawrence Berkeley National Laboratory, Berkeley, CA 94720J. L. DrachenbergAbilene Christian University , Abilene , TX 79699E. DuckworthKent State University , Kent , OH 44242J. C. DunlopBrookhaven National Laboratory , Upton , NY 11973J. EngelageUniversity of Kentucky, Lexington, KY 40506-0055G. EppleyCzech Technical University in Prague , FNSPE , Prague 115 19 , Czech RepublicS. EsumiJoint Institute for Nuclear Research, Dubna 141 980, RussiaO. EvdokimovUniversity of Illinois at Chicago , Chicago , IL 60607A. EwiglebenLehigh University, Bethlehem, PA 18015O. EyserTexas A&M University, College Station, TX 77843R. FatemiUniversity of Kentucky , Lexington , KY 40506-0055 afF. M. FawziAmerican University of Cairo , New Cairo 11835 , New Cairo , EgyptS. FazioUniversity of Calabria & INFN-Cosenza , ItalyC. FengNational Cheng Kung University, Tainan 70101Y. FengAGH University of Science and Technology, FPACS, Cracow 30-059, PolandE. FinchUniversity of California, Riverside, CA 92521Y. FisyakBrookhaven National Laboratory , Upton , NY 11973A. FranciscoYale University, New Haven, CT 06520C. FuCzech Technical University in Prague , FNSPE , Prague 115 19 , Czech RepublicC. A. GagliardiBrookhaven National Laboratory, Upton, NY 11973T. GalatyukInstituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, ChileF. J. M. GeurtsKent State University, Kent, OH 44242N. GhimireBrookhaven National Laboratory, Upton, NY 11973S. M. GibsonValparaiso University, Valparaiso, IN 46383K. GopalUniversity of California, Riverside, CA 92521X. GouShandong University , Qingdao , Shandong 266237D. GrosnickCzech Technical University in Prague , FNSPE , Prague 115 19 , Czech RepublicA. GuptaCzech Technical University in Prague , FNSPE , Prague 115 19 , Czech RepublicW. GurynBrookhaven National Laboratory , Upton , NY 11973A. HamedAmerican University of Cairo , New Cairo 11835 , New Cairo , EgyptY. HanUniversity of California , Davis , CA 95616S. HarabaszJoint Institute for Nuclear Research, Dubna 141 980, RussiaM. D. HarastyUniversity of California, Davis, CA 95616J. W. HarrisCzech Technical University in Prague , FNSPE , Prague 115 19 , Czech RepublicH. HarrisonInstituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, ChileS. HeUniversity of California , Davis , CA 95616W. HeJoint Institute for Nuclear Research, Dubna 141 980, RussiaY. HeJoint Institute for Nuclear Research, Dubna 141 980, Russia
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In high-energy heavy-ion collisions, partonic collectivity is evidenced by the constituent quark number scaling of elliptic flow anisotropy for identified hadrons . A breaking of this scaling and dominance of baryonic interactions is found for identified hadron collective flow measurements in s NN = 3 GeV Au+Au collisions. In this paper, we report measurements of the first- and second-order azimuthal anisotropic parameters, v 1 and v 2 , of light nuclei ( d , t , 3 He, 4 He) produced in s NN = 3 GeV Au+Au collisions at the STAR experiment. An atomic mass number scaling is found in the measured v 1 slopes of light nuclei at mid-rapidity. For the measured v 2 magnitude, a strong rapidity dependence is observed. Unlike v 2 at higher collision energies, the v 2 values at mid-rapidity for all light nuclei are negative and no scaling is observed with the atomic mass number. Calculations by the Jet AA Microscopic Transport Model (JAM), with baryonic mean-field plus nucleon coalescence, are in good agreement with our observations, implying baryonic interactions dominate the collective dynamics in 3 GeV Au+Au collisions at RHIC.
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