Computing the temperature dependence of effective CP violation in the standard model

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F12%3A00391470" target="_blank" >RIV/61389005:_____/12:00391470 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/JHEP11(2012)076" target="_blank" >http://dx.doi.org/10.1007/JHEP11(2012)076</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/JHEP11(2012)076" target="_blank" >10.1007/JHEP11(2012)076</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Computing the temperature dependence of effective CP violation in the standard model

Popis výsledku v původním jazyce

CP violation in the standard model originates from the Cabibbo-Kobayashi-Maskawa mixing matrix. Upon integrating all fermions out of the theory, its effects are captured by a series of effective nonrenormalizable operators for the bosonic gauge and Higgsfields. We compute the CP-violating part of the effective action to the leading nontrivial, sixth order in the covariant gradient expansion as a function of temperature. In the limit of zero temperature, our result addresses the discrepancy between twoindependent calculations existing in the literature. We find that CP violation in the standard model is strongly suppressed at high temperature, but that at T less than or similar to 1 GeV it may be relevant for certain scenarios of baryogenesis. We alsoidentify a selected class of operators at the next, eighth order and discuss the convergence of the covariant gradient expansion.

Název v anglickém jazyce

Computing the temperature dependence of effective CP violation in the standard model

Popis výsledku anglicky

CP violation in the standard model originates from the Cabibbo-Kobayashi-Maskawa mixing matrix. Upon integrating all fermions out of the theory, its effects are captured by a series of effective nonrenormalizable operators for the bosonic gauge and Higgsfields. We compute the CP-violating part of the effective action to the leading nontrivial, sixth order in the covariant gradient expansion as a function of temperature. In the limit of zero temperature, our result addresses the discrepancy between twoindependent calculations existing in the literature. We find that CP violation in the standard model is strongly suppressed at high temperature, but that at T less than or similar to 1 GeV it may be relevant for certain scenarios of baryogenesis. We alsoidentify a selected class of operators at the next, eighth order and discuss the convergence of the covariant gradient expansion.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BE - Teoretická fyzika

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Journal of High Energy Physics

ISSN

1126-6708

e-ISSN

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Svazek periodika

2012

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

34

Strana od-do

076

Kód UT WoS článku

000312198500011

EID výsledku v databázi Scopus

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