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Publikācija: Charged-Particle Nuclear Modification Factors in PbPb and pPb Collisions at √sNN = 5.02 TeV

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Nosaukums oriģinālvalodā Charged-Particle Nuclear Modification Factors in PbPb and pPb Collisions at √sNN = 5.02 TeV
Pētniecības nozare 1. Dabaszinātnes
Pētniecības apakšnozare 1.3. Fizika un astronomija
Autori CERN international group of authors
Viesturs Veckalns
Atslēgas vārdi Heavy Ion Experiments, Quark Gluon Plasma, Relativistic heavy ion physics
Anotācija 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 < p T < 400 GeV in pp and 0.7 < p T < 400 GeV in PbPb collisions. The corresponding nuclear modification factor, R AA , is measured in bins of collision centrality. The R AA in the 5% most central collisions shows a maximal suppression by a factor of 7-8 in the p T region of 6-9 GeV. This dip is followed by an increase, which continues up to the highest p T measured, and approaches unity in the vicinity of p T = 200 GeV. The R AA 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, R pA , up to 120 GeV. For p T > 20 GeV, R pA exhibits weak momentum dependence and shows a moderate enhancement above unity.[Figure not available: see fulltext.]
DOI: 10.1007/JHEP04(2017)039
Hipersaite: https://link.springer.com/article/10.1007%2FJHEP04%282017%29039 
Atsauce international group of authors, C., Veckalns, V. Charged-Particle Nuclear Modification Factors in PbPb and pPb Collisions at √sNN = 5.02 TeV. Journal of High Energy Physics, 2017, Vol.2017, Iss.4, 1.-10.lpp. ISSN 1126-6708. e-ISSN 1029-8479. Pieejams: doi:10.1007/JHEP04(2017)039
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ID 27129