Heavy-quark production and elliptic flow in Au plus Au collisions at root(NN)-N-S=62.4 GeV

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@article{8daf38475332492a9913ea684aa978d5,
title = "Heavy-quark production and elliptic flow in Au plus Au collisions at root(NN)-N-S=62.4 GeV",
abstract = "We present measurements of electrons and positrons from the semileptonic decays of heavy-flavor hadrons at midrapidity (vertical bar gamma vertical bar < 0.35) in Au + Au collisions at root(NN)-N-S = 62.4 GeV. The data were collected in 2010 by the PHENIX experiment that included the new hadron-blind detector. The invariant yield of electrons from heavy-flavor decays is measured as a function of transverse momentum in the range 1 < p(T)(e) < 5 GeV/c. The invariant yield per binary collision is slightly enhanced above the p + p reference in Au + Au 0%-20%, 20%-40%, and 40%-60% centralities at a comparable level. At this low beam energy this may be a result of the interplay between initial-state Cronin effects, final-state flow, and energy loss in medium. The v(2) of electrons from heavy-flavor decays is nonzero when averaged between 1.3 < p(T)(e) < 2.5 GeV/c for 0%-40% centrality collisions at root(NN)-N-S = 62.4 GeV. For 20%-40% centrality collisions, the v(2) at root(NN)-N-S = 62.4 GeV is smaller than that for heavy-flavor decays at root(NN)-N-S = 200 GeV. The v2 of the electrons from heavy-flavor decay at the lower beam energy is also smaller than v(2) for pions. Both results indicate that the heavy quarks interact with the medium formed in these collisions, but they may not be at the same level of thermalization with the medium as observed at root(NN)-N-S = 200 GeV.",
author = "A. Adare and C. Aidala and Ajitanand, {N. N.} and Y. Akiba and R. Akimoto and H. Al-Ta'ani and J. Alexander and A. Angerami and K. Aoki and N. Apadula and Y. Aramaki and H. Asano and Aschenauer, {E. C.} and Atomssa, {E. T.} and Awes, {T. C.} and B. Azmoun and V. Babintsev and M. Bai and B. Bannier and Barish, {K. N.} and B. Bassalleck and S. Bathe and V. Baublis and S. Baumgart and A. Bazilevsky and R. Belmont and A. Berdnikov and Y. Berdnikov and X. Bing and Blau, {D. S.} and Bok, {J. S.} and K. Boyle and Brooks, {M. L.} and H. Buesching and V. Bumazhnov and S. Butsyk and S. Campbell and P. Castera and Chen, {C. -H.} and Chi, {C. Y.} and M. Chiu and Choi, {I. J.} and Choi, {J. B.} and S. Choi and Choudhury, {R. K.} and Peter Christiansen and T. Chujo and O. Chvala and V. Cianciolo and Z. Citron and Cole, {B. A.} and M. Connors and M. Csanad and T. Csoergo and S. Dairaku and A. Datta and Daugherity, {M. S.} and G. David and A. Denisov and A. Deshpande and Desmond, {E. 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Younus and Yushmanov, {I. E.} and Zajc, {W. A.} and A. Zelenski",
year = "2015",
doi = "10.1103/PhysRevC.91.044907",
language = "English",
volume = "91",
journal = "Physical Review C",
issn = "2469-9985",
publisher = "American Physical Society",
number = "4",

}