Gravitational corrections to electroweak vacuum decay: metric vs. Palatini

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Gravitational corrections to electroweak vacuum decay: metric vs. Palatini

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Gravitational corrections to electroweak vacuum decay: metric vs. Palatini

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Physics Letters B

ISSN

0370-2693

e-ISSN

—

Svazek periodika

840

Číslo periodika v rámci svazku

May 2023

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

„137885-1“-„137885-6“

Kód UT WoS článku

000982487300001

EID výsledku v databázi Scopus

2-s2.0-85151656241