Gravitational corrections to electroweak vacuum decay: metric vs. Palatini

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F23%3AA0000292" target="_blank" >RIV/47813059:19630/23:A0000292 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0370269323002198?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0370269323002198?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2023.137885" target="_blank" >10.1016/j.physletb.2023.137885</a>

Result language

angličtina

Original language name

Gravitational corrections to electroweak vacuum decay: metric vs. Palatini

Original language description

We consider the standard Einstein-Hilbert-Higgs action where the Higgs field couples nonminimally with gravity via the term xi h2R, and investigate the stability of the electroweak vacuum in the presence of gravitational corrections in both the metric and Palatini formulations of gravity. In order to identify the differences between the two formalisms analytically, we follow a perturbative approach in which the gravitational corrections are taken into consideration via a leading order expansion in the gravitational coupling constant. Our analysis shows that in the Palatini formalism, the well-known effect of gravity suppressing the vacuum decay probability, becomes milder in comparison with the metric case for any value of the nonminimal coupling xi. Furthermore, we have found that in the Palatini formalism, the positivity of the gravitational corrections, which is a necessary requirement for the unitarity of the theory, entails the lower bound xi &gt; -1/12.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physics Letters B

ISSN

0370-2693

e-ISSN

—

Volume of the periodical

840

Issue of the periodical within the volume

May 2023

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

6

Pages from-to

„137885-1“-„137885-6“

UT code for WoS article

000982487300001

EID of the result in the Scopus database

2-s2.0-85151656241