26-30 July 2021
Europe/Berlin timezone

A pitfall in applying a non-anticommuting gamma5 in qqbar to > Z+Higgs amplitudes

30 Jul 2021, 10:00


Parallel session talk QCD and Hadronic Physics T06: QCD and Hadronic Physics


Taushif Ahmed (Max-Planck-Institut für Physik)


We show how the polarized amplitudes of $b \bar{b} \rightarrow Z h$ associated with a non-vanishing $b$-quark Yukawa coupling and a scalar or pseudoscalar Higgs boson $h$ can be built up solely from vector form factors (FF) of properly grouped classes of diagrams, bypassing completely the need of explicitly manipulating $\gamma_5$ in dimensional regularization.

In addition, the FFs of a class of corrections to $q \bar{q} \rightarrow ZH$ proportional to the top-Yukawa coupling are obtained analytically to two-loop order in QCD in the heavy-top limit. We address a pitfall that occurs when applying the non-anticommutating $\gamma_5$ prescription to this class of contributions that has been overlooked so far in the literature.

Collaboration / Activity Sorry,I do not understand this
Email taushif@mpp.mpg.de
First author Taushif Ahmed

Primary authors

Taushif Ahmed (Max-Planck-Institut für Physik) Dr Long Chen Prof. Michal Czakon

Presentation Materials