Closing in on critical net-baryon fluctuations at LHC energies: Cumulants up to third order in Pb-Pb collisions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F23%3A00581039" target="_blank" >RIV/61389005:_____/23:00581039 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/23:00581039 RIV/68407700:21340/23:00370359

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2022.137545" target="_blank" >https://doi.org/10.1016/j.physletb.2022.137545</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2022.137545" target="_blank" >10.1016/j.physletb.2022.137545</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Closing in on critical net-baryon fluctuations at LHC energies: Cumulants up to third order in Pb-Pb collisions

Popis výsledku v původním jazyce

Fluctuation measurements are important sources of information on the mechanism of particle production at LHC energies. This article reports the first experimental results on third-order cumulants of the net-proton distributions in Pb-Pb collisions at a center-of-mass energy root s(NN) = 5.02 TeV recorded by the ALICE detector. The results on the second-order cumulants of net-proton distributions at root s(NN) = 2.76 and 5.02TeV are also discussed in view of effects due to the global and local baryon number conservation. The results demonstrate the presence of long-range rapidity correlations between protons and antiprotons. Such correlations originate from the early phase of the collision. The experimental results are compared with HIJING and EPOS model calculations, and the dependence of the fluctuation measurements on the phase-space coverage is examined in the context of lattice quantum chromodynamics (LQCD) and hadron resonance gas (HRG) model estimations. The measured third-order cumulants are consistent with zero within experimental uncertainties of about 4% and are described well by LQCD and HRG predictions.

Název v anglickém jazyce

Closing in on critical net-baryon fluctuations at LHC energies: Cumulants up to third order in Pb-Pb collisions

Popis výsledku anglicky

Fluctuation measurements are important sources of information on the mechanism of particle production at LHC energies. This article reports the first experimental results on third-order cumulants of the net-proton distributions in Pb-Pb collisions at a center-of-mass energy root s(NN) = 5.02 TeV recorded by the ALICE detector. The results on the second-order cumulants of net-proton distributions at root s(NN) = 2.76 and 5.02TeV are also discussed in view of effects due to the global and local baryon number conservation. The results demonstrate the presence of long-range rapidity correlations between protons and antiprotons. Such correlations originate from the early phase of the collision. The experimental results are compared with HIJING and EPOS model calculations, and the dependence of the fluctuation measurements on the phase-space coverage is examined in the context of lattice quantum chromodynamics (LQCD) and hadron resonance gas (HRG) model estimations. The measured third-order cumulants are consistent with zero within experimental uncertainties of about 4% and are described well by LQCD and HRG predictions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/LM2018104" target="_blank" >LM2018104: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Physics Letters. B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

844

Číslo periodika v rámci svazku

SEP

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

137545

Kód UT WoS článku

001079706300001

EID výsledku v databázi Scopus

2-s2.0-85167424594