Skewness and kurtosis of mean transverse momentum fluctuations at the LHC energies

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00585802" target="_blank" >RIV/68378271:_____/24:00585802 - isvavai.cz</a>

Alternative codes found

RIV/61389005:_____/24:00585802 RIV/68407700:21340/24:00377084

Result on the web

<a href="https://doi.org/10.1016/j.physletb.2024.138541" target="_blank" >https://doi.org/10.1016/j.physletb.2024.138541</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2024.138541" target="_blank" >10.1016/j.physletb.2024.138541</a>

Result language

angličtina

Original language name

Skewness and kurtosis of mean transverse momentum fluctuations at the LHC energies

Original language description

The first measurements of skewness and kurtosis of mean transverse momentum (< p(T)>) fluctuations are reported in Pb-Pb collisions at root s(NN) = 5.02 TeV, Xe-Xe collisions at root s(NN) = 5.44 TeV and pp collisions at root s = 5.02 TeV using the ALICE detector. The measurements are carried out as a function of system size < dN(ch)/d eta >(1/3)(vertical bar eta vertical bar<0.5), using charged particles with transverse momentum (p(T)) and pseudorapidity (eta), in the range 0.2 < p(T) < 3.0 GeV/c and vertical bar eta vertical bar < 0.8, respectively. In Pb-Pb and Xe-Xe collisions, positive skewness is observed in the fluctuations of < p(T)> for all centralities, which is significantly larger than what would be expected in the scenario of independent particle emission. This positive skewness is considered a crucial consequence of the hydrodynamic evolution of the hot and dense nuclear matter created in heavy-ion collisions. Furthermore, similar observations of positive skewness for minimum bias pp collisions are also reported here. Kurtosis of < p(T)> fluctuations is found to be in good agreement with the kurtosis of Gaussian distribution, for most central Pb-Pb collisions. Hydrodynamic model calculations with MUSIC using Monte Carlo Glauber initial conditions are able to explain the measurements of both skewness and kurtosis qualitatively from semicentral to central collisions in Pb-Pb system. Color reconnection mechanism in PYTHIA8 model seems to play a pivotal role in capturing the qualitative behavior of the same measurements in pp collisions.

Czech name

—

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

—

OECD FORD branch

10303 - Particles and field physics

Project

<a href="/en/project/LM2023040" target="_blank" >LM2023040: Research infrastructure for experiments at CERN</a><br>

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

850

Issue of the periodical within the volume

MAR

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

14

Pages from-to

138541

UT code for WoS article

001203454800001

EID of the result in the Scopus database

2-s2.0-85187503035