【04.01】Seminar:Analytic decay width of the Higgs boson to massive bottom quarks at order $\alpha_s^3$
Seminar
报告题目:Analytic decay width of the Higgs boson to massive bottom quarks at order $\alpha_s^3$
报告人:王烨凡,副研究员,南京师范大学
主持人:李钊,研究员,
报告时间:2025年4月1日(周二),下午15:00
报告地点:高能所图书馆楼319
报告摘要:
We present an analytical result for the decay into massive bottom quarks at $\mathcal{O}(\alpha_s^3)$ including the contribution from the top quark Yukawa coupling induced process. We have made use of the optical theorem, canonical differential equations and the regular basis in the calculation and expressed the result in terms of multiple polylogarithms and elliptic functions. We find that the $\mathcal{O}(\alpha_s^3)$ corrections increase the decay width by $1\%$ because of the large logarithms $\log^I m_H^2/m_b^2$ in the small bottom quark mass limit. The coefficient of the double logarithms is proportional to $C_A-C_F$, a typical color structure in the resummation of soft quark contributions at subleading power.
个人简介:
王烨凡,2016年本科毕业于山东大学物理学院,2021年博士毕业于
;2021年7月-2024年3月为山东大学博士后,2024年4月入职南京师范大学。主要研究方向为微扰量子场论以及顶夸克物理、Higgs物理的高精度理论预言。
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