在模型无关情景和轻夸克模型中重新研究半光子B→D(*)τν¯τ衰变

IF 5 2区 物理与天体物理 Q1 Physics and Astronomy
Zhuo-Ran Huang, Faisal Munir Bhutta, Nimra Farooq, M. Ali Paracha, Ying Li
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引用次数: 0

摘要

在这项工作中,我们通过分析与B→D(*)τν¯τ衰变相关的观测值,重新审视了可能的新物理解决方案。为了探索新物理的结构,B→D(*)衰变的形式因子起着至关重要的作用。在本研究中,我们利用了同时拟合Belle数据和晶格QCD计算获得的形状因子结果。利用这些形状因子,我们对新的物理威尔逊系数进行了全局拟合,并结合了最新的实验数据。此外,我们使用形状因子和威尔逊系数来预测物理观测值,包括轻子味普惠比RD(*),极化观测值,以及与四重衰变B→D*(→Dπ,Dγ)τν¯τ相关的归一化角系数⟨I⟩。这些预测是在模型独立的情况下和三种不同的轻夸克模型中计算出来的。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。
Reinvestigating the semileptonic B→D(*)τν¯τ decays in the model independent scenarios and leptoquark models
In this work, we revisit the possible new physics solutions by analyzing the observables associated with B→D(*)τν¯τ decays. To explore the structure of new physics, the form factors of BD(*) decays play a crucial role. In this study, we utilize the form factor results obtained from a simultaneous fit to Belle data and lattice QCD calculations. Using these form factors, we conduct a global fit of the new physics Wilson coefficients, incorporating the most recent experimental data. Additionally, we use the form factors and Wilson coefficients to make predictions for physical observables, including the lepton flavor universality ratio RD(*), polarized observables, and the normalized angular coefficients I’s related to the fourfold decays BD*(Dπ,Dγ)τν¯τ. These predictions are calculated in both model independent scenarios and for three different leptoquark models. Published by the American Physical Society 2025
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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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