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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...
Autores principales: | , |
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Lenguaje: | eng |
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1994
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Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.50.774 http://cds.cern.ch/record/249423 |
_version_ | 1780885440894599168 |
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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 |
record_format | invenio |
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 |