Constraining the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Pb-Pb collisions at root s(NN)=2.76 and 5.02 TeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00534039" target="_blank" >RIV/61389005:_____/20:00534039 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/20:00534039 RIV/68407700:21340/20:00346351

Výsledek na webu

<a href="https://doi.org/10.1007/JHEP09(2020)160" target="_blank" >https://doi.org/10.1007/JHEP09(2020)160</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP09(2020)160" target="_blank" >10.1007/JHEP09(2020)160</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Constraining the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Pb-Pb collisions at root s(NN)=2.76 and 5.02 TeV

Popis výsledku v původním jazyce

Systematic studies of charge-dependent two- and three-particle correlations in Pb-Pb collisions at root s(NN) = 2.76 and 5.02 TeV used to probe the Chiral Magnetic Effect (CME) are presented. These measurements are performed for charged particles in the pseudorapidity (eta) and transverse momentum (p(T)) ranges |eta| < 0.8 and 0.2 < p(T) < 5 GeV/c. A significant charge-dependent signal that becomes more pronounced for peripheral collisions is reported for the CME-sensitive correlators gamma(1, 1) = < cos(phi(alpha) + phi(beta) - 2 psi(2))> and gamma(1, - 3) = < cos(phi(alpha) - 3 phi(beta) + 2 psi(2))>. The results are used to estimate the contribution of background effects, associated with local charge conservation coupled to anisotropic flow modulations, to measurements of the CME. A blast-wave parametrisation that incorporates local charge conservation tuned to reproduce the centrality dependent background effects is not able to fully describe the measured gamma(1,1). Finally, the charge and centrality dependence of mixed-harmonics three-particle correlations, of the form gamma(1, 2) = < cos(phi(alpha) + 2 phi(beta) - 3 psi(3))>, which are insensitive to the CME signal, verify again that background contributions dominate the measurement of gamma(1,1).

Název v anglickém jazyce

Constraining the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Pb-Pb collisions at root s(NN)=2.76 and 5.02 TeV

Popis výsledku anglicky

Systematic studies of charge-dependent two- and three-particle correlations in Pb-Pb collisions at root s(NN) = 2.76 and 5.02 TeV used to probe the Chiral Magnetic Effect (CME) are presented. These measurements are performed for charged particles in the pseudorapidity (eta) and transverse momentum (p(T)) ranges |eta| < 0.8 and 0.2 < p(T) < 5 GeV/c. A significant charge-dependent signal that becomes more pronounced for peripheral collisions is reported for the CME-sensitive correlators gamma(1, 1) = < cos(phi(alpha) + phi(beta) - 2 psi(2))> and gamma(1, - 3) = < cos(phi(alpha) - 3 phi(beta) + 2 psi(2))>. The results are used to estimate the contribution of background effects, associated with local charge conservation coupled to anisotropic flow modulations, to measurements of the CME. A blast-wave parametrisation that incorporates local charge conservation tuned to reproduce the centrality dependent background effects is not able to fully describe the measured gamma(1,1). Finally, the charge and centrality dependence of mixed-harmonics three-particle correlations, of the form gamma(1, 2) = < cos(phi(alpha) + 2 phi(beta) - 3 psi(3))>, which are insensitive to the CME signal, verify again that background contributions dominate the measurement of gamma(1,1).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

—

Svazek periodika

2020

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

AE - Spojené arabské emiráty

Počet stran výsledku

34

Strana od-do

160

Kód UT WoS článku

000573260500001

EID výsledku v databázi Scopus

2-s2.0-85091584177