稀有顶夸克衰变成喷流加带电伪标量介子的研究

IF 5 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-04-17 DOI:10.1103/physrevd.111.076016

Long-Shun Lu, Lei-Yi Li, Cai-Dian Lü

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引用次数: 0

摘要

在QCD分解的框架下，研究了顶夸克半包涵衰变为带电伪标量介子和射流的过程。衰变矩阵元素的先导功率可以分解为重到轻的夸克跃迁电流和强子矩阵元素，直到次先导级QCD修正。我们计算了αs阶的单环虚修正和实胶子发射修正。给出了两体和三体衰变和的分支比的数值结果。我们还研究了胶子射流的能量截止依赖性。这些过程有望在不久的将来的实验中被发现，这可以作为新物理学的探测器。2025年由美国物理学会出版

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Study of rare top quark decays into a jet plus a charged pseudoscalar meson

The semi-inclusive decay processes of a top quark into a charged pseudoscalar meson and a jet are studied within the framework of QCD factorization. The leading power of the decay matrix elements can be factorized into heavy-to-light quark transition current and a hadron matrix element up to next-to-leading-order QCD corrections. We calculate one-loop virtual corrections together with real gluon emission corrections at the αs order. The numerical results of the branching ratios are presented for the sum of two- and three-body decays. We also study the energy cutoff dependence of the gluon jet. These processes are hopeful to be detected in near future experiments, which can serve as probes for new physics.

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.