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Bulk properties of the system formed in Au+Au collisions at sNN =14.5 GeV at the BNL STAR detector

  • Author(s): Adam, J;
  • Adamczyk, L;
  • Adams, JR;
  • Adkins, JK;
  • Agakishiev, G;
  • Aggarwal, MM;
  • Ahammed, Z;
  • Alekseev, I;
  • Anderson, DM;
  • Aparin, A;
  • Aschenauer, EC;
  • Ashraf, MU;
  • Atetalla, FG;
  • Attri, A;
  • Averichev, GS;
  • Bairathi, V;
  • Barish, K;
  • Behera, A;
  • Bellwied, R;
  • Bhasin, A;
  • Bielcik, J;
  • Bielcikova, J;
  • Bland, LC;
  • Bordyuzhin, IG;
  • Brandenburg, JD;
  • Brandin, AV;
  • Butterworth, J;
  • Caines, H;
  • Calderón De La Barca Sánchez, M;
  • Cebra, D;
  • Chakaberia, I;
  • Chaloupka, P;
  • Chan, BK;
  • Chang, FH;
  • Chang, Z;
  • Chankova-Bunzarova, N;
  • Chatterjee, A;
  • Chen, D;
  • Chen, JH;
  • Chen, X;
  • Chen, Z;
  • Cheng, J;
  • Cherney, M;
  • Chevalier, M;
  • Choudhury, S;
  • Christie, W;
  • Crawford, HJ;
  • Csanád, M;
  • Daugherity, M;
  • Dedovich, TG;
  • Deppner, IM;
  • Derevschikov, AA;
  • Didenko, L;
  • Dong, X;
  • Drachenberg, JL;
  • Dunlop, JC;
  • Edmonds, T;
  • Elsey, N;
  • Engelage, J;
  • Eppley, G;
  • Esha, R;
  • Esumi, S;
  • Evdokimov, O;
  • Ewigleben, J;
  • Eyser, O;
  • Fatemi, R;
  • Fazio, S;
  • Federic, P;
  • Fedorisin, J;
  • Feng, CJ;
  • Feng, Y;
  • Filip, P;
  • Finch, E;
  • Fisyak, Y;
  • Francisco, A;
  • Fulek, L;
  • Gagliardi, CA;
  • Galatyuk, T;
  • Geurts, F;
  • Gibson, A;
  • Gopal, K;
  • Grosnick, D;
  • Guryn, W;
  • Hamad, AI;
  • Hamed, A;
  • Harris, JW;
  • He, S;
  • He, W;
  • He, X;
  • Heppelmann, S;
  • Heppelmann, S;
  • Herrmann, N;
  • Hoffman, E;
  • Holub, L;
  • Hong, Y;
  • Horvat, S;
  • Hu, Y;
  • Huang, HZ;
  • Huang, SL;
  • Huang, T
  • et al.
Abstract

We report systematic measurements of bulk properties of the system created in Au+Au collisions at sNN=14.5 GeV recorded by the STAR detector at the Relativistic Heavy Ion Collider (RHIC). The transverse momentum spectra of π±, K±, and p(p) are studied at midrapidity (|y|<0.1) for nine centrality intervals. The centrality, transverse momentum (pT), and pseudorapidity (η) dependence of inclusive charged particle elliptic flow (v2), and rapidity-odd charged particles directed flow (v1) results near midrapidity are also presented. These measurements are compared with the published results from Au+Au collisions at other energies, and from Pb+Pb collisions at sNN=2.76 TeV. The results at sNN=14.5 GeV show similar behavior as established at other energies and fit well in the energy dependence trend. These results are important as the 14.5-GeV energy fills the gap in μB, which is of the order of 100 MeV, between sNN=11.5 and 19.6 GeV. Comparisons of the data with UrQMD and AMPT models show poor agreement in general.

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