Sep 9 – 13, 2019
Europe/Zurich timezone

Off-shell renormalization of spontaneously broken effective gauge theories

Sep 12, 2019, 5:00 PM
25m
Cubiculaire

Cubiculaire

Speaker

Andrea Quadri (INFN, Sez. di Milano)

Description

The consistent recursive subtraction of UV divergences order by order in the loop expansion for spontaneously broken effective gauge theories with higher dimension derivative operators is presented. The Slavnov-Taylor identity is solved to all orders in the loop expansion by homotopy techniques and a suitable choice of invariant field coordinates (named bleached variables) for the linearly realized gauge group. This allows one to disentangle the gauge-invariant contributions to off-shell 1-PI amplitudes from those associated with the gauge-fixing and (generalized) non-polynomial field redefinitions (that do appear already at one loop). Explicit examples for dimension-6 operators are presented.

Primary authors

Andrea Quadri (INFN, Sez. di Milano) Daniele Binosi (ECT* Fondazione Bruno Kessler)

Presentation materials