Elliptic Flow of Electrons from Heavy-Flavor Hadron Decays in Au + Au Collisions at √^s_NN = 200, 62.4, and 39 GeV

Authors

L. Adamczyk, AGH University of Science and Technology, Poland
J. Kevin Adkins, University of KentuckyFollow
G. Agakishiev, Joint Institute for Nuclear Research, Russia
M. M. Aggarwal, Panjab University, India
Z. Ahammed, Variable Energy Cyclotron Centre, India
N. N. Ajitanand, State University of New York - Stony Brook
I. Alekseev, Alikhanov Institute for Theoretical and Experimental Physics, Russia
D. M. Anderson, Texas A&M University
R. Aoyama, University of Tsukuba, Japan
A. Aparin, Joint Institute for Nuclear Research, Russia
D. Arkhipkin, Brookhaven National Laboratory
E. C. Aschenauer, Brookhaven National Laboratory
M. U. Ashraf, Tsinghua University, China
A. Attri, Panjab University, India
G. S. Averichev, Joint Institute for Nuclear Research, Russia
X. Bai, Central China Normal University, China
V. Bairathi, National Institute of Science Education and Research, India
A. Behera, State University of New York - Stony Brook
R. Bellwied, University of Houston
A. Bhasin, University of Jammu, India
A. K. Bhati, Panjab University, India
P. Bhattarai, University of Texas at Austin
J. Bielcik, Czech Technical University in Prague, Czech Republic
J. Bielcikova, Nuclear Physics Institute AS CR, Czech Republic
L. C. Bland, Brookhaven National Laboratory
I. G. Bordyuzhin, Alikhanov Institute for Theoretical and Experimental Physics, Russia
J. Bouchet, Kent State University
J. D. Brandenburg, Rice University
A. V. Brandin, National Research Nuclear Univeristy MEPhI, Russia
D. Brown, Lehigh University
Renee H. Fatemi, University of KentuckyFollow
Suvarna Ramachandran, University of KentuckyFollow

Abstract

We present measurements of elliptic flow (ν₂) of electrons from the decays of heavy-flavor hadrons (e_HF) by the STAR experiment. For Au+Au collisions at √s_NN = 200 GeV we report v₂, for transverse momentum (p_T) 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 √s_NN = 62.4 and 39 GeV we report v₂{2} for p_T < 2 GeV/c. v₂{2} and v₂{4} are nonzero at low and intermediate p_T at 200 GeV, and v₂{2} is consistent with zero at low p_T at other energies. The v₂{2} at the two lower beam energies is systematically lower than at √s_NN = 200 GeV for p_T < 1GeV/c. This difference may suggest that charm quarks interact less strongly with the surrounding nuclear matter at those two lower energies compared to √s_NN = 200 GeV.

Document Type

Article

Publication Date

3-13-2017

Notes/Citation Information

Published in Physical Review C, v. 95, issue 3, 034907, p. 1-12.

©2017 American Physical Society

The copyright holder has granted permission for posting the article here.

Due to the large number of authors, only the first 30 and the authors affiliated with the University of Kentucky are listed in the author section above. For the complete list of authors, please download this article or visit: https://doi.org/10.1103/PhysRevC.95.034907

This group of authors is collectively known as the STAR Collaboration.

Digital Object Identifier (DOI)

https://doi.org/10.1103/PhysRevC.95.034907

Repository Citation

Adamczyk, L.; Adkins, J. Kevin; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Ajitanand, N. N.; Alekseev, I.; Anderson, D. M.; Aoyama, R.; Aparin, A.; Arkhipkin, D.; Aschenauer, E. C.; Ashraf, M. U.; Attri, A.; Averichev, G. S.; Bai, X.; Bairathi, V.; Behera, A.; Bellwied, R.; Bhasin, A.; Bhati, A. K.; Bhattarai, P.; Bielcik, J.; Bielcikova, J.; Bland, L. C.; Bordyuzhin, I. G.; Bouchet, J.; Brandenburg, J. D.; Brandin, A. V.; Brown, D.; Fatemi, Renee H.; and Ramachandran, Suvarna, "Elliptic Flow of Electrons from Heavy-Flavor Hadron Decays in Au + Au Collisions at √^s_NN = 200, 62.4, and 39 GeV" (2017). Physics and Astronomy Faculty Publications. 534.
https://uknowledge.uky.edu/physastron_facpub/534