具有Möbius畴壁费米子的(2+1)-味QCD的手性交叉跃迁

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-02-11 DOI:10.1103/physrevd.111.034507

Rajiv V. Gavai, Mischa E. Jaensch, Olaf Kaczmarek, Frithjof Karsch, Mugdha Sarkar, Ravi Shanker, Sayantan Sharma, Sipaz Sharma, Tristan Ueding

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引用次数: 0

摘要

在具有两种光味的量子色动力学（QCD）中，手性对称性的非单重态部分可以通过赝临界温度下的交叉跃迁得到恢复。然而，手性对称单线态部分的温度依赖性以及在相同温度下是否能有效恢复，目前还不清楚。利用在Nτ=8晶格上使用Möbius畴壁离散生成的(2+1)-味QCD构型，我们构建了合适的观测值，其中单线态和非单线态手性对称性被解纠缠，以便研究它们在交叉跃迁中的温度依赖性。从手性磁化率断开部分的峰值，我们得到了伪临界温度Tpc=158.7−2.3+2.6 MeV，在此温度下手性对称性的非单重态部分得到了有效恢复。通过对拓扑磁化率及其温度依赖性的计算，我们发现在T > 186 MeV时手性对称的单重态UA(1)部分不能有效地恢复。2025年由美国物理学会出版

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Aspects of the chiral crossover transition in ( 2+1 )-flavor QCD with Möbius domain-wall fermions

The nonsinglet part of the chiral symmetry in quantum chromodynamics (QCD) with two light flavors is known to be restored through a crossover transition at a pseudocritical temperature. However, the temperature dependence of the singlet part of the chiral symmetry and whether it is effectively restored at the same temperature is not well understood. Using (2+1)-flavor QCD configurations generated using the Möbius domain-wall discretization on an Nτ=8 lattice, we construct suitable observables where the singlet and nonsinglet chiral symmetries are disentangled in order to study their temperature dependence across the crossover transition. From the peak of the disconnected part of the chiral susceptibility, we obtain a pseudocritical temperature Tpc=158.7−2.3+2.6 MeV where the nonsinglet part of the chiral symmetry is effectively restored. From a calculation of the topological susceptibility and its temperature dependence we find that the singlet UA(1) part of the chiral symmetry is not effectively restored at T≲186 MeV.

Published by the American Physical Society

2025

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来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.