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
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 author||L. Adamczyk, J.R. Adams, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, N.N. Ajita.....|
|Total number of authors||348|
|Journal series||Physical Review Letters, ISSN 0031-9007, (A 45 pkt)|
|Publication size in sheets||0.5|
|Score|| = 45.0, ArticleFromJournal|
= 45.0, ArticleFromJournal
|Publication indicators||= 0; = 1; : 2017 = 2.464; : 2017 = 8.839 (2) - 2017=7.888 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.