Event-by-event correlations between Λ (Λ) hyperon global polarization and handedness with charged hadron azimuthal separation in Au plus Au collisions at root sNN=27 GeV from STAR

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F23%3A00382445" target="_blank" >RIV/68407700:21340/23:00382445 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevC.108.014909" target="_blank" >https://doi.org/10.1103/PhysRevC.108.014909</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.108.014909" target="_blank" >10.1103/PhysRevC.108.014909</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Event-by-event correlations between Λ (Λ) hyperon global polarization and handedness with charged hadron azimuthal separation in Au plus Au collisions at root sNN=27 GeV from STAR

Popis výsledku v původním jazyce

Global polarizations (P) of Lambda (Lambda) hyperons have been observed in noncentral heavy-ion collisions. The strong magnetic field primarily created by the spectator protons in such collisions would split the Lambda and Lambda global polarizations (Delta P = P-Lambda - P-Lambda < 0). Additionally, quantum chromodynamics predicts topological charge fluctuations in vacuum, resulting in a chirality imbalance or parity violation in a local domain. This would give rise to an imbalance (Delta n = N-L-N-R/ N-L+N-R not equal 0) between left-and right-handed Lambda (Lambda) as well as a charge separation along the magnetic field, referred to as the chiral magnetic effect (CME). This charge separation can be characterized by the parity-even azimuthal correlator (Delta gamma) and parity-odd azimuthal harmonic observable (Delta a(1)). Measurements of Delta P, Delta gamma, and Delta a(1) have not led to definitive conclusions concerning the CME or the magnetic field, and An has not been measured previously. Correlations among these observables may reveal new insights. This paper reports measurements of correlation between Delta n and Delta a(1), which is sensitive to chirality fluctuations, and correlation between Delta P and Delta gamma sensitive to magnetic field in Au + Au collisions at 27 GeV. For both measurements, no correlations have been observed beyond statistical fluctuations.

Název v anglickém jazyce

Event-by-event correlations between Λ (Λ) hyperon global polarization and handedness with charged hadron azimuthal separation in Au plus Au collisions at root sNN=27 GeV from STAR

Popis výsledku anglicky

Global polarizations (P) of Lambda (Lambda) hyperons have been observed in noncentral heavy-ion collisions. The strong magnetic field primarily created by the spectator protons in such collisions would split the Lambda and Lambda global polarizations (Delta P = P-Lambda - P-Lambda < 0). Additionally, quantum chromodynamics predicts topological charge fluctuations in vacuum, resulting in a chirality imbalance or parity violation in a local domain. This would give rise to an imbalance (Delta n = N-L-N-R/ N-L+N-R not equal 0) between left-and right-handed Lambda (Lambda) as well as a charge separation along the magnetic field, referred to as the chiral magnetic effect (CME). This charge separation can be characterized by the parity-even azimuthal correlator (Delta gamma) and parity-odd azimuthal harmonic observable (Delta a(1)). Measurements of Delta P, Delta gamma, and Delta a(1) have not led to definitive conclusions concerning the CME or the magnetic field, and An has not been measured previously. Correlations among these observables may reveal new insights. This paper reports measurements of correlation between Delta n and Delta a(1), which is sensitive to chirality fluctuations, and correlation between Delta P and Delta gamma sensitive to magnetic field in Au + Au collisions at 27 GeV. For both measurements, no correlations have been observed beyond statistical fluctuations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LM2023034" target="_blank" >LM2023034: Brookhavenská národní laboratoř – účast České republiky</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

PHYSICAL REVIEW C

ISSN

2469-9985

e-ISSN

2469-9993

Svazek periodika

108

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

—

Kód UT WoS článku

001265570700004

EID výsledku v databázi Scopus

2-s2.0-85169100229