31 May 2021 to 4 June 2021
Online
Europe/Madrid timezone

The Anomalous Case of Axion EFTs and Massive Chiral Gauge Fields

Not scheduled
10m
Online

Online

Poster session only Poster Session

Speaker

Alejo Rossia (Deutsches Elektronen-Synchrotron DESY)

Description

We study axion effective field theories (EFTs), with a focus on axion couplings to massive chiral gauge fields. We investigate the EFT interactions that participate in processes with an axion and two gauge bosons, and we show that, when massive chiral gauge fields are present, such interactions do not entirely originate from the usual anomalous EFT terms. When applied to the case of the Standard Model (SM) electroweak sector, our results imply that anomaly-based sum rules between EFT interactions are violated when chiral matter is integrated out, which constitutes a smoking gun of the latter. As an illustration, we study a UV-complete chiral extension of the SM, containing an axion arising from an extended Higgs sector and heavy fermionic matter that obtains most of its mass by coupling to the Higgs doublets. We assess the viability of such a SM extension through electroweak precision tests, bounds on Higgs rates and direct searches for heavy charged matter. At energies below the mass of the new chiral fermions, the model matches onto an EFT where the electroweak gauge symmetry is non-linearly realised.

arXiv number (if applicable) 2011.10025

Primary author

Alejo Rossia (Deutsches Elektronen-Synchrotron DESY)

Co-authors

Quentin Bonnefoy (DESY) Luca Di Luzio (Deutsches Elektronen-Synchrotron DESY) Christophe Grojean (DESY (Hamburg) and Humboldt University (Berlin)) Dr Ayan Paul (DESY, Hamburg and Humboldt Universität zu Berlin)

Presentation materials