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Beam-energy dependence of the directed flow of deuterons in Au+Au collisions

  • 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
  • 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
  • Chu, X
  • 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
  • Esumi, S
  • Evdokimov, O
  • Ewigleben, A
  • 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
  • Harabasz, S
  • Harris, JW
  • He, S
  • He, W
  • He, XH
  • Heppelmann, S
  • Heppelmann, S
  • Herrmann, N
  • Hoffman, E
  • Holub, L
  • Hong, Y
  • Horvat, S
  • Hu, Y
  • Huang, HZ
  • Huang, SL
  • et al.
Abstract

© 2020 American Physical Society. We present a measurement of the first-order azimuthal anisotropy v1 of deuterons from Au+Au collisions at sNN=7.7, 11.5, 14.5, 19.6, 27, and 39 GeV recorded with the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The energy dependence of the v1(y) slope, dv1/dy|y=0, for deuterons, where y is the rapidity, is extracted for semicentral collisions (10%-40% centrality) and compared with that of protons. While the v1(y) slopes of protons are generally negative for sNN>10GeV, those for deuterons are consistent with zero, a strong enhancement of the v1(y) slope of deuterons is seen at the lowest collision energy (the largest baryon density) at sNN=7.7GeV. In addition, we report the transverse momentum dependence of v1 for protons and deuterons. The experimental results are compared with transport and coalescence models.

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