Second Order QCD Corrections to the Top Decay Rate
K.G. Chetyrkin, R. Harlander, T. Seidensticker, M. Steinhauser
TL;DR
This paper presents a calculation of the top quark decay rate including second-order QCD corrections, using asymptotic expansions and Padé approximation to accurately determine the decay rate at the physical point.
Contribution
It introduces a novel method combining asymptotic expansions and Padé approximation to compute second-order QCD corrections to the top decay rate.
Findings
Accurate second-order QCD corrections to top decay rate obtained.
Method demonstrates effectiveness in handling off-shell propagator expansions.
Results improve precision in theoretical predictions of top decay processes.
Abstract
We report on a recent calculation of the top decay rate up to order \alpha_s^2. It is based on asymptotic expansions of the off-shell top propagator, followed by a Pad\'e approximation in order to reach the physically relevant point q^2=Mt^2.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research