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Elliptic flow of electrons from heavy-flavor hadron decays in Au + Au collisions at √sNN =200, 62.4, and 39 GeV

  • Author(s): Adamczyk, L
  • Adkins, JK
  • Agakishiev, G
  • Aggarwal, MM
  • Ahammed, Z
  • Ajitanand, NN
  • Alekseev, I
  • Anderson, DM
  • Aoyama, R
  • Aparin, A
  • Arkhipkin, D
  • Aschenauer, EC
  • Ashraf, MU
  • Attri, A
  • Averichev, GS
  • Bai, X
  • Bairathi, V
  • Behera, A
  • Bellwied, R
  • Bhasin, A
  • Bhati, AK
  • Bhattarai, P
  • Bielcik, J
  • Bielcikova, J
  • Bland, LC
  • Bordyuzhin, IG
  • Bouchet, J
  • Brandenburg, JD
  • Brandin, AV
  • Brown, D
  • Bunzarov, I
  • Butterworth, J
  • Caines, H
  • Calderón De La Barca Sánchez, M
  • Campbell, JM
  • Cebra, D
  • Chakaberia, I
  • Chaloupka, P
  • Chang, Z
  • Chankova-Bunzarova, N
  • Chatterjee, A
  • Chattopadhyay, S
  • Chen, X
  • Chen, JH
  • Chen, X
  • Cheng, J
  • Cherney, M
  • Christie, W
  • Contin, G
  • Crawford, HJ
  • Das, S
  • De Silva, LC
  • Debbe, RR
  • Dedovich, TG
  • Deng, J
  • Derevschikov, AA
  • Didenko, L
  • Dilks, C
  • Dong, X
  • Drachenberg, JL
  • Draper, JE
  • Dunkelberger, LE
  • Dunlop, JC
  • Efimov, LG
  • Elsey, N
  • Engelage, J
  • Eppley, G
  • Esha, R
  • Esumi, S
  • Evdokimov, O
  • Ewigleben, J
  • Eyser, O
  • Fatemi, R
  • Fazio, S
  • Federic, P
  • Federicova, P
  • Fedorisin, J
  • Feng, Z
  • Filip, P
  • Finch, E
  • Fisyak, Y
  • Flores, CE
  • Fulek, L
  • Gagliardi, CA
  • Garand, D
  • Geurts, F
  • Gibson, A
  • Girard, M
  • Grosnick, D
  • Gunarathne, DS
  • Guo, Y
  • Gupta, S
  • Gupta, A
  • Guryn, W
  • Hamad, AI
  • Hamed, A
  • Harlenderova, A
  • Harris, JW
  • He, L
  • et al.
Abstract

© 2017 American Physical Society. We present measurements of elliptic flow (v2) of electrons from the decays of heavy-flavor hadrons (eHF) by the STAR experiment. For Au+Au collisions at sNN=200 GeV we report v2, for transverse momentum (pT) between 0.2 and 7 GeV/c, using three methods: the event plane method (v2{EP}), two-particle correlations (v2{2}), and four-particle correlations (v2{4}). For Au+Au collisions at sNN=62.4 and 39 GeV we report v2{2} for pT<2GeV/c. v2{2} and v2{4} are nonzero at low and intermediate pT at 200 GeV, and v2{2} is consistent with zero at low pT at other energies. The v2{2} at the two lower beam energies is systematically lower than at sNN=200 GeV for pT<1GeV/c. This difference may suggest that charm quarks interact less strongly with the surrounding nuclear matter at those two lower energies compared to sNN=200 GeV.

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