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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10304 - Nuclear physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics [online]

ISSN

1029-8479

e-ISSN

—

Svazek periodika

2017

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

45

Strana od-do

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Kód UT WoS článku

000399275400001

EID výsledku v databázi Scopus

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