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Baryon asymmetry of the Universe in the standard model

We study the interactions of quarks and antiquarks with the changing Higgs field during the electroweak phase transition, including quantum mechanical and some thermal effects, with the only source of CP violation being the known CKM phase. The magnitude and sign of the predicted BAU agrees with the...

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Detalles Bibliográficos
Autores principales: Farrar, Glennys R., Shaposhnikov, M.E.
Lenguaje:eng
Publicado: 1994
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.50.774
http://cds.cern.ch/record/249423
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author Farrar, Glennys R.
Shaposhnikov, M.E.
author_facet Farrar, Glennys R.
Shaposhnikov, M.E.
author_sort Farrar, Glennys R.
collection CERN
description We study the interactions of quarks and antiquarks with the changing Higgs field during the electroweak phase transition, including quantum mechanical and some thermal effects, with the only source of CP violation being the known CKM phase. The magnitude and sign of the predicted BAU agrees with the observed value, with moderately optimistic assumptions about the dynamics of the phase transition. At present uncertainties related to the dynamics of the ew phase transition and the oversimplifications of our treatment are too great to decide whether or not this is the correct explanation for the presence of remnant matter in our universe, however the present work makes it clear that the minimal standard model cannot be discounted as a contender for explaining this phenomenon.
id cern-249423
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1994
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spelling cern-2494232020-07-23T02:44:29Zdoi:10.1103/PhysRevD.50.774http://cds.cern.ch/record/249423engFarrar, Glennys R.Shaposhnikov, M.E.Baryon asymmetry of the Universe in the standard modelParticle Physics - PhenomenologyWe study the interactions of quarks and antiquarks with the changing Higgs field during the electroweak phase transition, including quantum mechanical and some thermal effects, with the only source of CP violation being the known CKM phase. The magnitude and sign of the predicted BAU agrees with the observed value, with moderately optimistic assumptions about the dynamics of the phase transition. At present uncertainties related to the dynamics of the ew phase transition and the oversimplifications of our treatment are too great to decide whether or not this is the correct explanation for the presence of remnant matter in our universe, however the present work makes it clear that the minimal standard model cannot be discounted as a contender for explaining this phenomenon.We study the interactions of quarks and antiquarks with the changing Higgs field during the electroweak phase transition, including quantum mechanical and some thermal effects, treating only fermion motion perpendicular to the bubble wall. We find that the magnitude and sign of the present baryonic asymmetry of the universe can be accounted for entirely within the minimal standard model. Both magnitude and sign of the asymmetry have an intricate dependence on quark masses and mixings, so that agreement between prediction and observation is highly non-trivial. Better understanding of the physics of the high-temperature environment and the nature of the ew phase transition will be necessary before it will be possible to decide whether or not this is the correct explanation for the presence of remnant matter in our universe. A Letter-length version of this work is being simultaneously submitted to the net and has been tentatively assigned the number hep-ph/9305274; a shortened version of it appeared in Phys. Rev. Lett. {\bf 70}, 2833, 1993.hep-ph/9305275CERN-TH-6732-93CERN-TH-6734-93RU-93-11CERN-TH-6734-93RU-93-11oai:cds.cern.ch:2494231994
spellingShingle Particle Physics - Phenomenology
Farrar, Glennys R.
Shaposhnikov, M.E.
Baryon asymmetry of the Universe in the standard model
title Baryon asymmetry of the Universe in the standard model
title_full Baryon asymmetry of the Universe in the standard model
title_fullStr Baryon asymmetry of the Universe in the standard model
title_full_unstemmed Baryon asymmetry of the Universe in the standard model
title_short Baryon asymmetry of the Universe in the standard model
title_sort baryon asymmetry of the universe in the standard model
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.50.774
http://cds.cern.ch/record/249423
work_keys_str_mv AT farrarglennysr baryonasymmetryoftheuniverseinthestandardmodel
AT shaposhnikovme baryonasymmetryoftheuniverseinthestandardmodel