Beam energy dependence of moments of the net-charge multiplicity distributions in Au+Au collisions at RHIC

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F14%3A00219315" target="_blank" >RIV/68407700:21340/14:00219315 - isvavai.cz</a>

Výsledek na webu

<a href="http://arxiv.org/pdf/1402.1558.pdf" target="_blank" >http://arxiv.org/pdf/1402.1558.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.113.092301" target="_blank" >10.1103/PhysRevLett.113.092301</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Beam energy dependence of moments of the net-charge multiplicity distributions in Au+Au collisions at RHIC

Popis výsledku v původním jazyce

We report the first measurements of the moments -- mean (M), variance (?2), skewness (S) and kurtosis (?) -- of the net-charge multiplicity distributions at mid-rapidity in Au+Au collisions at seven energies, ranging from sNNroot = 7.7 to 200 GeV, as a part of the Beam Energy Scan program at RHIC. The moments are related to the thermodynamic susceptibilities of net-charge, and are sensitive to the proximity of the QCD critical point. We compare the products of the moments, ?2/M, S? and ??2 with the expectations from Poisson and negative binomial distributions (NBD). The S? values deviate from Poisson and are close to NBD baseline, while the ??2 values tend to lie between the two. Within the present uncertainties, our data do not show non-monotonic behavior as a function of collision energy. These measurements provide a distinct way of determining the freeze-out parameters in heavy-ion collisions by comparing with theoretical models.

Název v anglickém jazyce

Beam energy dependence of moments of the net-charge multiplicity distributions in Au+Au collisions at RHIC

Popis výsledku anglicky

We report the first measurements of the moments -- mean (M), variance (?2), skewness (S) and kurtosis (?) -- of the net-charge multiplicity distributions at mid-rapidity in Au+Au collisions at seven energies, ranging from sNNroot = 7.7 to 200 GeV, as a part of the Beam Energy Scan program at RHIC. The moments are related to the thermodynamic susceptibilities of net-charge, and are sensitive to the proximity of the QCD critical point. We compare the products of the moments, ?2/M, S? and ??2 with the expectations from Poisson and negative binomial distributions (NBD). The S? values deviate from Poisson and are close to NBD baseline, while the ??2 values tend to lie between the two. Within the present uncertainties, our data do not show non-monotonic behavior as a function of collision energy. These measurements provide a distinct way of determining the freeze-out parameters in heavy-ion collisions by comparing with theoretical models.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

—

Projekt

<a href="/cs/project/GA13-20841S" target="_blank" >GA13-20841S: Studium jaderné hmoty v ultra-relativistických jaderných srážkách na urychlovači RHIC</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

PHYSICAL REVIEW LETTERS

ISSN

0031-9007

e-ISSN

—

Svazek periodika

113

Číslo periodika v rámci svazku

Aug

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

000341301800002

EID výsledku v databázi Scopus

—