Beam Energy Dependence of Jet-Quenching Effects in Au+Au Collisions at sNN =7.7, 11.5, 14.5, 19.6, 27, 39, and 62.4 GeV

Deryk Anderson , Xin-Nan Chen , Xin-Nan Chen , J Cheng , Martin Girard , Y. Guo , Hong-Zhong HUANG , Wei-Te Huang , Daniel Kikoła , Adam Kisiel , Leszek Kosarzewski , W. Li , Pengfei Liu , Fengwei Liu , Lin Ma , Mayer J. R. R. , A. M. Mustafa Al Bakri , Bernd Page , Jan Pluta , Katarzyna Poniatowska , Joanna Porter-Sobieraj , J. Schambach , R Sikora , S. Tripathy , Barbara Trzeciak , Cheng-Zhong Xu , J. W. Xu , Wuqiang Q Yang , S. Yang , Hanna Zbroszczyk , Jian Zhang , Jian Zhang , Jian Zhang , J Zhao , X. Zhu

Abstract

We report measurements of the nuclear modification factor RCP for charged hadrons as well as identified π+(-), K+(-), and p(p) for Au+Au collision energies of sNN=7.7, 11.5, 14.5, 19.6, 27, 39, and 62.4 GeV. We observe a clear high-pT net suppression in central collisions at 62.4 GeV for charged hadrons which evolves smoothly to a large net enhancement at lower energies. This trend is driven by the evolution of the pion spectra but is also very similar for the kaon spectra. While the magnitude of the proton RCP at high pT does depend on the collision energy, neither the proton nor the antiproton RCP at high pT exhibit net suppression at any energy. A study of how the binary collision-scaled high-pT yield evolves with centrality reveals a nonmonotonic shape that is consistent with the idea that jet quenching is increasing faster than the combined phenomena that lead to enhancement.

Collective authorL. Adamczyk, J.R. Adams, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, N.N. Ajita.....
Author Deryk Anderson
Deryk Anderson ,,
-
, Xin-Nan Chen
Xin-Nan Chen,,
-
, Xin-Nan Chen
Xin-Nan Chen,,
-
, J Cheng
J Cheng,,
-
, Martin Girard (FP / NPD)
Martin Girard,,
- Nuclear Physics Division
, Y. Guo
Y. Guo,,
-
, Hong-Zhong HUANG
Hong-Zhong HUANG ,,
-
, Wei-Te Huang
Wei-Te Huang,,
-
, Daniel Kikoła (FP / NPD)
Daniel Kikoła,,
- Nuclear Physics Division
, Adam Kisiel (FP / NPD)
Adam Kisiel,,
- Nuclear Physics Division
et al.`
Total number of authors348
Journal seriesPhysical Review Letters, ISSN 0031-9007, (A 45 pkt)
Issue year2018
Vol121
Pages1-8
Publication size in sheets0.5
ASJC Classification3100 General Physics and Astronomy
DOIDOI:10.1103/PhysRevLett.121.032301
Languageen angielski
Score (nominal)45
ScoreMinisterial score = 45.0, 21-11-2018, ArticleFromJournal
Ministerial score (2013-2016) = 45.0, 21-11-2018, ArticleFromJournal
Publication indicators Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 2.464; WoS Impact Factor: 2017 = 8.839 (2) - 2017=7.888 (5)
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