Self-similarity of KS0-meson production in Au plus Au collisions from BES-I at STAR and anomaly of 'specific heat' and entropy

Kód výsledku v IS VaVaI

RIV/61389005:_____/22:00560215 - isvavai.cz

Výsledek na webu

https://doi.org/10.1016/j.nuclphysa.2022.122492

DOI - Digital Object Identifier

10.1016/j.nuclphysa.2022.122492

Jazyk výsledku

angličtina

Název v původním jazyce

Self-similarity of KS0-meson production in Au plus Au collisions from BES-I at STAR and anomaly of 'specific heat' and entropy

Popis výsledku v původním jazyce

We present results of analysis of K-S(0)-meson spectra in Au + Au collisions obtained by the STAR Collaboration in the first phase of the Beam Energy Scan program at RHIC using the z-scaling approach. The analyzed data on inclusive cross sections were measured over a wide range of collision energy root s(NN) = 7.7 - 200 GeV and transverse momentum of produced particles for different centralities in the rapidity range vertical bar y vertical bar < 0.5. A scaling behavior of the spectra in z-presentation is observed. The concept of the z-scaling is based on fundamental principles of self-similarity, locality, and fractality of hadron interactions at a constituent level. Structure of the colliding nuclei and fragmentation process in final state are described by fractal dimensions delta(A) and is an element of(AA), respectively. Produced medium is characterized by a 'specific heat' c(AA). Onset of constant delta(A), smooth increase of is an element of(AA) and anomalous behavior of c(AA) with collision energy in the scaling regime are observed. The self-similarity of fractal structure of nuclei and fragmentation processes with K-S(0) probe is demonstrated. The energy loss as a function of the collision energy, centrality and transverse momentum of the inclusive particle is estimated. An anomaly in the entropy behavior of system configurations in the region root s(NN) similar to 30 - 40 GeV at low pT in the central collisions is found. A possible signature of phase transition indicated by the peculiarities of specific heat and entropy as ingredients of the z-scaling of K-S(0)-meson production is discussed.

Název v anglickém jazyce

Self-similarity of KS0-meson production in Au plus Au collisions from BES-I at STAR and anomaly of 'specific heat' and entropy

Popis výsledku anglicky

We present results of analysis of K-S(0)-meson spectra in Au + Au collisions obtained by the STAR Collaboration in the first phase of the Beam Energy Scan program at RHIC using the z-scaling approach. The analyzed data on inclusive cross sections were measured over a wide range of collision energy root s(NN) = 7.7 - 200 GeV and transverse momentum of produced particles for different centralities in the rapidity range vertical bar y vertical bar < 0.5. A scaling behavior of the spectra in z-presentation is observed. The concept of the z-scaling is based on fundamental principles of self-similarity, locality, and fractality of hadron interactions at a constituent level. Structure of the colliding nuclei and fragmentation process in final state are described by fractal dimensions delta(A) and is an element of(AA), respectively. Produced medium is characterized by a 'specific heat' c(AA). Onset of constant delta(A), smooth increase of is an element of(AA) and anomalous behavior of c(AA) with collision energy in the scaling regime are observed. The self-similarity of fractal structure of nuclei and fragmentation processes with K-S(0) probe is demonstrated. The energy loss as a function of the collision energy, centrality and transverse momentum of the inclusive particle is estimated. An anomaly in the entropy behavior of system configurations in the region root s(NN) similar to 30 - 40 GeV at low pT in the central collisions is found. A possible signature of phase transition indicated by the peculiarities of specific heat and entropy as ingredients of the z-scaling of K-S(0)-meson production is discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

LTT19005: Česká účast v mezinárodním experimentu KATRIN

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Nuclear Physics. A

ISSN

0375-9474

e-ISSN

1873-1554

Svazek periodika

1025

Číslo periodika v rámci svazku

SEP

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

33

Strana od-do

122492

Kód UT WoS článku

000833597300002

EID výsledku v databázi Scopus

2-s2.0-85133813933