Beam Energy Dependence of Fifth- and Sixth-Order Net-Proton Number Fluctuations in Au + Au Collisions at RHIC

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F23%3A00573206" target="_blank" >RIV/61389005:_____/23:00573206 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1103/PhysRevLett.130.082301" target="_blank" >https://doi.org/10.1103/PhysRevLett.130.082301</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.130.082301" target="_blank" >10.1103/PhysRevLett.130.082301</a>

Result language

angličtina

Original language name

Beam Energy Dependence of Fifth- and Sixth-Order Net-Proton Number Fluctuations in Au + Au Collisions at RHIC

Original language description

We report the beam energy and collision centrality dependence of fifth and sixth order cumulants (C-5, C-6) and factorial cumulants (kappa(5),kappa(6)) of net-proton and proton number distributions, from center-of mass energy ( root(NN)-N-s) 3 GeV to 200 GeV Au thorn Au collisions at RHIC. Cumulant ratios of net-proton (taken as proxy for net-baryon) We report the beam energy and collision centrality dependence of fifth and sixth order cumulants (C-5, C-6) and factorial cumulants (kappa(5), kappa(6)) of net-proton and proton number distributions, from center-of-mass energy (root(NN)-N-s) 3 GeV to 200 GeV Au thorn Au collisions at RHIC. Cumulant ratios of net-proton (taken sNN as proxy for net-baryon) distributions generally follow the hierarchy expected from QCD thermodynamics, except for the case of collisions at 3 GeV. The measured values of C-6/C-2 for 0%-40% centrality collisions show progressively negative trend with decreasing energy, while it is positive for the lowest energy studied. These observed negative signs are consistent with QCD calculations (for baryon chemical potential, mu(B) <= 110 MeV) which contains the crossover transition range. In addition, for energies above 7.7 GeV, the measured proton kappa(n), within uncertainties, does not support the two-component (Poisson thorn binomial) shape of proton number distributions that would be expected from a first-order phase transition. Taken in combination, the hyperorder proton number fluctuations suggest that the structure of QCD matter at high baryon density, mu(B) similar to 750 MeV at root(NN)-N-s = 3 GeV is starkly different from those at vanishing sNN mu(B) similar to 24 MeV at root(NN)-N-s = 200 GeV and higher collision energies. sNN

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10304 - Nuclear physics

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Physical Review Letters

ISSN

0031-9007

e-ISSN

1079-7114

Volume of the periodical

130

Issue of the periodical within the volume

8

Country of publishing house

US - UNITED STATES

Number of pages

8

Pages from-to

082301

UT code for WoS article

000982318800009

EID of the result in the Scopus database

2-s2.0-85149659741