𝐷0−¯𝐷0混合Dyson-Schwinger方法

IF 5.3 2区 物理与天体物理 Q1 Physics and Astronomy
Xiaotong Xie, Hiroyuki Umeeda, and Jinglong Zhu
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引用次数: 0

摘要

考虑到通过算子积展开在𝐷0−¯𝐷0混合中再现可观测值的困难,我们讨论了该过程的Dyson-Schwinger方法。通过夸克传播子的参数化表述,以适当考虑动态手性对称破缺的方式评估了与粲数混合相关的SU(3)破缺。讨论了用𝐷0介子衰变常数和相关动量积分表示的具有局域性的光价夸克场的真空插入近似中¯𝐷0→𝐷0跃迁。结果表明,该方法可观测到的无因次质量差为|≥| =(1.3 - 2.9)×10−3,其数量级与HFLAV数据相当,从而为理论框架提供了一定的改进。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
𝐷0− ¯ 𝐷 0 mixing in the Dyson-Schwinger approach
In view of difficulty to reproduce observables in the 𝐷0 − ¯ 𝐷 0 mixing via the operator product expansion, we discuss the Dyson-Schwinger approach to this process. Formulated by the parametrization of quark propagators, SU(3) breaking relevant to charm mixing is evaluated in such a way that properly takes account of dynamical chiral symmetry breaking. The ¯ 𝐷 0 →𝐷0 transition is discussed in the vacuum-insertion approximation with locality of the light valence-quark field, represented by the decay constant of 𝐷0 meson as well as relevant momentum integrals. It is found that dimensionless mass-difference observable in this approach leads to |𝑥| =(1.3 – 2.9) ×10−3, the order of magnitude comparable to the HFLAV data, and thereby offering a certain improvement as a theoretical framework.
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来源期刊
Physical Review D
Physical Review D 物理-天文与天体物理
CiteScore
9.20
自引率
36.00%
发文量
0
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.
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