Nonmonotonic Energy Dependence of Net-Proton Number Fluctuations.
Journal
Physical review letters
ISSN: 1079-7114
Titre abrégé: Phys Rev Lett
Pays: United States
ID NLM: 0401141
Informations de publication
Date de publication:
05 Mar 2021
05 Mar 2021
Historique:
received:
17
09
2020
revised:
19
11
2020
accepted:
27
01
2021
entrez:
22
3
2021
pubmed:
23
3
2021
medline:
23
3
2021
Statut:
ppublish
Résumé
Nonmonotonic variation with collision energy (sqrt[s_{NN}]) of the moments of the net-baryon number distribution in heavy-ion collisions, related to the correlation length and the susceptibilities of the system, is suggested as a signature for the quantum chromodynamics critical point. We report the first evidence of a nonmonotonic variation in the kurtosis times variance of the net-proton number (proxy for net-baryon number) distribution as a function of sqrt[s_{NN}] with 3.1 σ significance for head-on (central) gold-on-gold (Au+Au) collisions measured solenoidal tracker at Relativistic Heavy Ion Collider. Data in noncentral Au+Au collisions and models of heavy-ion collisions without a critical point show a monotonic variation as a function of sqrt[s_{NN}].
Identifiants
pubmed: 33750161
doi: 10.1103/PhysRevLett.126.092301
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM