A pitfall in applying non-anticommuting $\gamma_5$ in $q\overline{q} \rightarrow ZH$ amplitudes

Taushif Ahmed

A pitfall in applying non-anticommuting $\gamma_5$ in $q\overline{q} \rightarrow ZH$ amplitudes

High Energy Physics - Phenomenology 2021-10-11 v1 High Energy Physics - Theory

Authors: Taushif Ahmed

Abstract

In computing the two-loop QCD corrections to a class of Feynman diagrams for the process $q\overline{q} \rightarrow ZH$ in Higgs effective field theory, we discover a striking phenomenon. We find the need for an additional local composite operator in the renormalised Lagrangian while employing a non-anticommuting $\gamma_5$ in dimensional regularisation. The computation using anticommuting $\gamma_5$ , however, does not require any such amendment.

Keywords

QCD corrections gamma_5 dimensional regularization Higgs effective field theory Feynman diagrams

Cite

@article{arxiv.2110.03835,
  title  = {A pitfall in applying non-anticommuting $\gamma_5$ in $q\overline{q} \rightarrow ZH$ amplitudes},
  author = {Taushif Ahmed},
  journal= {arXiv preprint arXiv:2110.03835},
  year   = {2021}
}

Comments

Contribution to the 15th International Symposium on Radiative Corrections (RADCOR) and the XIX Workshop on Radiative Corrections for the LHC and Future Colliders (LoopFest)

A pitfall in applying non-anticommuting $\gamma_5$ in $q\overline{q} \rightarrow ZH$ amplitudes

Abstract

Keywords

Cite

Comments

Related papers