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Higgs vacuum decay in a braneworld

Lookup NU author(s): Dr Kate Marshall, Professor Ian MossORCiD



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2020 © The Author(s). The Author(s).We examine the effect of large extra dimensions on vacuum decay in the Randall-Sundrum (RS) braneworld paradigm. We assume the scalar field is confined to the brane, and compute the probability for forming an "anti-de Sitter" (AdS) bubble inside a critical flat RS brane. We present the first full numerical solutions for the brane instanton considering two test potentials for the scalar field. We explore the geometrical impact of thin and thick bubble walls, and compute the instanton action in a range of cases. We conclude by commenting on a more physically realistic potential relevant for the Standard Model Higgs. For bubbles with large backreaction, the extra dimension has a dramatic effect on the tunnelling rate, however, for the weakly backreacting bubbles more relevant for realistic Standard Model potentials, the extra dimension has little impact.

Publication metadata

Author(s): Cuspinera L, Gregory R, Marshall KM, Moss IG

Publication type: Article

Publication status: Published

Journal: International Journal of Modern Physics D

Year: 2020

Volume: 29

Issue: 01

Print publication date: 01/01/2020

Online publication date: 04/12/2019

Acceptance date: 25/10/2019

Date deposited: 10/01/2020

ISSN (print): 0218-2718

ISSN (electronic): 1793-6594

Publisher: World Scientific Publishing Co. Pte Ltd


DOI: 10.1142/S0218271820500054


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