Fermion mixing renormalization and gauge invariance

P. Gambino; P. A. Grassi; F. Madricardo

doi:10.1016/S0370-2693(99)00321-4

Fermion mixing renormalization and gauge invariance

P. Gambino, P. A. Grassi, F. Madricardo

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

We study the renormalization of the fermion mixing matrix in the Standard Model and derive the constraints that must be satisfied to respect gauge invariance to all orders. We demonstrate that the prescription based on the on-shell renormalization conditions is not consistent with the Ward-Takahashi Identities and leads to gauge dependent physical amplitudes. A simple scheme is proposed that satisfies all theoretical requirements and is very convenient for practical calculations.

Lingua originale	Inglese
pagine (da-a)	98-104
Numero di pagine	7
Rivista	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	454
Numero di pubblicazione	1-2
DOI	https://doi.org/10.1016/S0370-2693(99)00321-4
Stato di pubblicazione	Pubblicato - 1999
Pubblicato esternamente	Sì

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10.1016/S0370-2693(99)00321-4

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AB - We study the renormalization of the fermion mixing matrix in the Standard Model and derive the constraints that must be satisfied to respect gauge invariance to all orders. We demonstrate that the prescription based on the on-shell renormalization conditions is not consistent with the Ward-Takahashi Identities and leads to gauge dependent physical amplitudes. A simple scheme is proposed that satisfies all theoretical requirements and is very convenient for practical calculations.

UR - https://www.scopus.com/pages/publications/0002172568

U2 - 10.1016/S0370-2693(99)00321-4

DO - 10.1016/S0370-2693(99)00321-4

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

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Fermion mixing renormalization and gauge invariance

Abstract

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