Renormalization of Fermion-Flavour Mixing

TL;DR

This paper presents a new on-shell renormalization framework for fermion-flavour mixing matrices in the Standard Model, effectively separating gauge-independent and gauge-dependent corrections at one-loop level.

Contribution

It introduces a novel procedure to explicitly separate external-leg mixing corrections into self-mass and wave-function renormalization components.

Findings

Provides a gauge-independent renormalization scheme for fermion-flavour mixing matrices.

Clarifies the separation of self-mass and wave-function contributions.

Applicable to Standard Model and extensions at one-loop level.

Abstract

We report on an explicit on-shell framework to renormalize the fermion-flavour mixing matrices in the Standard Model and its extensions, at one-loop level. It is based on a novel procedure to separate the external-leg mixing corrections into gauge-independent self-mass and gauge-dependent wave-function renormalization contributions.