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タイトル
和文:Measurement of jet fragmentation in Pb+Pb and pp collisions at sNN=2.76 TeV with the ATLAS detector at the LHC 
英文:Measurement of jet fragmentation in Pb+Pb and pp collisions at sNN=2.76 TeV with the ATLAS detector at the LHC 
著者
和文: M. Aaboud, 陣内 修, 久世 正弘, 山口 洋平, et al..  
英文: M. Aaboud, Osamu Jinnouchi, Masahiro.Kuze, Youhei Yamaguchi, et al..  
言語 English 
掲載誌/書名
和文:European Physical Journal C 
英文:European Physical Journal C 
巻, 号, ページ Vol. 77    No. 6    pp. "379"
出版年月 2017年6月 
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公式リンク https://www.scopus.com/inward/record.uri?eid=2-s2.0-85020662552&doi=10.1140%2fepjc%2fs10052-017-4915-5&partnerID=40&md5=5455f33255d46905ede45b71e2268eab
 
DOI https://doi.org/10.1140/epjc/s10052-017-4915-5
アブストラクト The distributions of transverse momentum and longitudinal momentum fraction of charged particles in jets are measured in Pb+Pb and pp collisions with the ATLAS detector at the LHC. The distributions are measured as a function of jet transverse momentum and rapidity. The analysis utilises an integrated luminosity of 0.14 nb$^{-1}$ of Pb+Pb data and 4.0 pb$^{-1}$ of pp data collected in 2011 and 2013, respectively, at the same centre-of-mass energy of 2.76 TeV per colliding nucleon pair. The distributions measured in pp collisions are used as a reference for those measured in Pb+Pb collisions in order to evaluate the impact on the internal structure of jets from the jet energy loss of fast partons propagating through the hot, dense medium created in heavy-ion collisions. Modest but significant centrality-dependent modifications of fragmentation functions in Pb+Pb collisions with respect to those in pp collisions are seen. No significant dependence of modifications on jet $p_\mathrm{T}$ and rapidity selections is observed except for the fragments with the highest transverse momenta for which some reduction of yields is observed for more forward

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