Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6368
Title: Charged-particle nuclear modification factors in PbPb and pPb collisions at ?sNN=5.02 TeV
Authors: CMS Collaboration
Karapınar, Güler
Karapınar, Güler
Izmir Institute of Technology. Mathematics
Keywords: Large Hadron Collider (LHC)
Compact Muon Solenoid
Issue Date: Apr-2017
Publisher: Springer Verlag
Source: Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T.,...CMS Collaboration (2017). Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV. Journal of High Energy Physics, 2017(4). doi:10.1007/JHEP04(2017)039
Abstract: The spectra of charged particles produced within the pseudorapidity window |η| < 1 at sNN=5.02 TeV are measured using 404 μb−1 of PbPb and 27.4 pb−1 of pp data collected by the CMS detector at the LHC in 2015. The spectra are presented over the transverse momentum ranges spanning 0.5 < pT< 400 GeV in pp and 0.7 < pT< 400 GeV in PbPb collisions. The corresponding nuclear modification factor, RAA, is measured in bins of collision centrality. The RAA in the 5% most central collisions shows a maximal suppression by a factor of 7-8 in the pT region of 6-9 GeV. This dip is followed by an increase, which continues up to the highest pT measured, and approaches unity in the vicinity of pT = 200 GeV. The RAA is compared to theoretical predictions and earlier experimental results at lower collision energies. The newly measured pp spectrum is combined with the pPb spectrum previously published by the CMS collaboration to construct the pPb nuclear modification factor, RpA, up to 120 GeV. For pT> 20 GeV, RpA exhibits weak momentum dependence and shows a moderate enhancement above unity.[Figure not available: see fulltext.] © 2017, The Author(s).
URI: http://doi.org/10.1007/JHEP04(2017)039
http://hdl.handle.net/11147/6368
ISSN: 1029-8479
Appears in Collections:Mathematics / Matematik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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