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

Result code in 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>

Alternative codes found

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

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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).

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Journal of High Energy Physics

ISSN

1029-8479

e-ISSN

—

Volume of the periodical

2020

Issue of the periodical within the volume

9

Country of publishing house

AE - UNITED ARAB EMIRATES

Number of pages

34

Pages from-to

160

UT code for WoS article

000573260500001

EID of the result in the Scopus database

2-s2.0-85091584177