Search for the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Xe-Xe collisions at √sNN=5.44 TeV

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00601123" target="_blank" >RIV/68378271:_____/24:00601123 - isvavai.cz</a>

Alternative codes found

RIV/61389005:_____/24:00601123

Result on the web

<a href="https://doi.org/10.1016/j.physletb.2024.138862" target="_blank" >https://doi.org/10.1016/j.physletb.2024.138862</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2024.138862" target="_blank" >10.1016/j.physletb.2024.138862</a>

Result language

angličtina

Original language name

Search for the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Xe-Xe collisions at √sNN=5.44 TeV

Original language description

Charge-dependent two- and three-particle correlations measured in Xe-Xe collisions at root S-NN = 5.44 TeV are presented. Results are obtained for charged particles in the pseudorapidity range |eta| < 0.8 and transverse momentum interval 0.2 <= p(T) < 5.0 GeV/c for different collision centralities. The three-particle correlator gamma(alpha beta)=< cos(phi(alpha) +phi(beta) - 2 psi(2))>, calculated for different combinations of charge sign alpha and beta, is expected to be sensitive to the presence of the Chiral Magnetic Effect (CME). Its magnitude is similar to the one observed in Pb-Pb collisions in contrast to a smaller CME signal in Xe-Xe collisions than in Pb-Pb collisions predicted by Monte Carlo (MC) calculations including a magnetic field induced by the spectator protons. These observations point to a large nonCME contribution to the correlator. Furthermore, the charge dependence of gamma(alpha beta) can be described by a blast wave model calculation that incorporates background effects and by the Anomalous Viscous Fluid Dynamics model with values of the CME signal consistent with zero. The Xe-Xe and Pb-Pb results are combined with the expected CME signal dependence on the system size from the MC calculations including a magnetic field to obtain the fraction of CME contribution in gamma(alpha beta), f(CME). The CME fraction is compatible with zero for the 30% most central events in both systems and then becomes positive. This yields an upper limit of 2% (3%) and 25% (32%) at 95% (99.7%) confidence level for the CME signal contribution to gamma(alpha beta) in the 0-70% Xe-Xe and Pb-Pb collisions, respectively.

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

10303 - Particles and field physics

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Physics Letters. B

ISSN

0370-2693

e-ISSN

1873-2445

Volume of the periodical

856

Issue of the periodical within the volume

SEP

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

14

Pages from-to

138862

UT code for WoS article

001346025700001

EID of the result in the Scopus database

2-s2.0-85198726626