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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Computing the temperature dependence of effective CP violation in the standard model
Original language description
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.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BE - Theoretical physics
OECD FORD branch
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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