Charged-particle nuclear modification factors in PbPb and pPb collisions at root s(NN)=5.02 TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10367645" target="_blank" >RIV/00216208:11320/17:10367645 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/JHEP04(2017)039" target="_blank" >http://dx.doi.org/10.1007/JHEP04(2017)039</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP04(2017)039" target="_blank" >10.1007/JHEP04(2017)039</a>

Result language

angličtina

Original language name

Charged-particle nuclear modification factors in PbPb and pPb collisions at root s(NN)=5.02 TeV

Original language description

The spectra of charged particles produced within the pseudorapidity window vertical bar eta vertical bar &lt; 1 at root s(NN) = 5 : 02 TeV are measured using 404 mu b(-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 &lt; p(T) &lt; 400 GeV in pp and 0 : 7 &lt; p(T) &lt; 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) &gt; 20 GeV, R-pA exhibits weak momentum dependence and shows a moderate enhancement above unity.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10304 - Nuclear physics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of High Energy Physics [online]

ISSN

1029-8479

e-ISSN

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Volume of the periodical

2017

Issue of the periodical within the volume

4

Country of publishing house

DE - GERMANY

Number of pages

45

Pages from-to

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UT code for WoS article

000399275400001

EID of the result in the Scopus database

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