Forward-backward asymmetries of the heavy quark pair production in e⁺e^- collisions at O(α_s²)

2021/05/13 by Long Chen, Chen, Long
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research

paper · pdf · doi:10.48550/arxiv.2105.06213

Abstract

The talk is on a computational set-up for calculating the production of a massive quark-antiquark pair in electron positron collisions to order α_s² in the coupling of quantum chromodynamics (QCD) at the differential level using the antenna subtraction method. Theoretical predictions on the production of top quark pairs in the continuum, and the bottom quark pairs at the Z resonance, will be discussed. In particular, we would be focusing on the order α_s² QCD corrections to the heavy quark forward-backward asymmetry (AFB) in electron positron collisions. In the case of the AFB of bottom quarks at the Z resonance, the QCD corrections are determined with respect to both the bottom quark axis and the thrust axis. We will also briefly discuss improvements on these QCD corrections brought by applying the optimization procedure based on the Principle of Maximum Conformality.

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