Precision Measurement of Net-Proton-Number Fluctuations in Au+Au Collisions at RHIC
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F25%3A00643875" target="_blank" >RIV/61389005:_____/25:00643875 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prl/abstract/10.1103/9l69-2d7p" target="_blank" >https://journals.aps.org/prl/abstract/10.1103/9l69-2d7p</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/9l69-2d7p" target="_blank" >10.1103/9l69-2d7p</a>
Alternative languages
Result language
angličtina
Original language name
Precision Measurement of Net-Proton-Number Fluctuations in Au+Au Collisions at RHIC
Original language description
We report precision measurements on cumulants (C-n) and factorial cumulants (kappa(n)) of (net) proton number distributions up to fourth order in Au + Au collisions over center- of-mass energies root s(NN) = 7.7- 27 GeV from phase II of the Beam Energy Scan program at RHIC. (Anti)protons are selected at midrapidity (|y| < 0.5) within a transverse momentum range of 0.4 < p(T) < 2.0 GeV=c. Relative to various noncritical-point model calculations and peripheral collision 70%-80% data, the net proton C-4/C-2 measurement in 0%-5% collisions shows a minimum around 19.6 GeV for significance of deviation at similar to 2-5 sigma. A minimum in C-4/C-2 with respect to a noncritical baseline is expected to be a characteristic feature of the signature associated with a critical point in the QCD phase diagram. In addition, deviations from noncritical baselines around the same collision energy region are also seen in proton factorial cumulant ratios, especially in kappa(2)/kappa(1) and kappa(3)/kappa(1). Dynamical model calculations including a critical point are called for in order to understand these precision measurements.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review Letters
ISSN
0031-9007
e-ISSN
1079-7114
Volume of the periodical
135
Issue of the periodical within the volume
14
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
142301
UT code for WoS article
001615629000001
EID of the result in the Scopus database
2-s2.0-105019114662