15–18 Mar 2021
Zoom
Europe/Zurich timezone

Forward-backward asymmetries of heavy quark pair production in $e^+e^-$ collisions at $\mathcal{\alpha_s^2}$

15 Mar 2021, 22:30
20m
Online Conference (Zoom)

Online Conference

Zoom

PD1: Theoretical Developments PD1: Theoretical Developments

Speaker

Dr Long Chen (RWTH Aachen University)

Description

In this talk, I will discuss a computational set-up for calculating the production of a massive quark-antiquark pair in $e^+e^-$ collisions at order $\alpha_s^2$ in the coupling of quantum chromodynamics (QCD) at the differential level by means of the antenna subtraction method.
Theoretical predictions on the production of top quark pairs in the continuum, and the bottom quark pairs at the Z-boson resonance, will be reported.
In particular, I will focus on the order $\alpha_s^2$ QCD corrections to the heavy quark forward-backward asymmetry ($A_{FB}$) in $e^+e^-$ collisions.
In the case of the $A_{FB}$ of bottom quarks at the Z-boson resonance, the QCD corrections are determined with respect to both the bottom quark axis and the thrust axis.
I will also briefly discuss improvements on these QCD corrections by applying the scale-optimization procedure based on the Principle of Maximum Conformality.

Time Zone Europe/Africa/Middle East

Primary author

Dr Long Chen (RWTH Aachen University)

Co-authors

Prof. Werner Bernreuther (RWTH Aachen University) Thomas Gehrmann Prof. Zong-Guo Si (ShanDong University) Prof. Xing-Gang Wu (Chongqing University) Dr Sheng-Quan Wang (Guizhou Minzu University) Rui-Qing Meng (Guizhou Minzu University) Jian-Ming Shen (Hunan University)

Presentation materials