Journal article
Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV
The journal of high energy physics, Vol.2017(4), 39
01/01/2017
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 < 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.
ISSN:1126-6708
ISSN:1029-8479
Details
- Title: Subtitle
- Charged-particle nuclear modification factors in PbPb and pPb collisions at √sNN=5.02 TeV
- Creators
- Vardan Khachatryan - A. Alikhanyan National LaboratoryFelix BachmairLukas BäniLorenzo BianchiniBruno CasalGünther DissertoriMichael DittmarMauro DonegàChristoph GrabConstantin HeideggerDmitry HitsJan HossGregor KasieczkaPierre LecomteWerner LustermannBoris ManganoMatthieu MarionneauPablo Martinez Ruiz Del ArbolMario MasciovecchioMaren T. MeinhardDaniel MeisterFrancesco MicheliPasquale MusellaFrancesca Nessi-TedaldiFrancesco PandolfiJoosep PataFelicitas PaussGaël PerrinLuca PerrozziMilena QuittnatMarco RossiniMyriam SchönenbergerAndrey StarodumovVittorio R. TavolaroKonstantinos TheofilatosRainer WallnyYasar Onel - University of Iowa, Physics and AstronomyCMS Collaboration
- Resource Type
- Journal article
- Publication Details
- The journal of high energy physics, Vol.2017(4), 39
- DOI
- 10.1007/JHEP04(2017)039
- ISSN
- 1126-6708
- eISSN
- 1029-8479
- Publisher
- Springer
- Language
- English
- Date published
- 01/01/2017
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984429052502771
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