Some aspects of collisional sources for electroweak baryogenesis

We consider the dynamics of fermions with a spatially varying mass which couple to bosons through a Yukawa interaction term and perform a consistent weak coupling truncation of the relevant kinetic equations. We then use a gradient expansion and derive the CP-violating source in the collision term f...

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Detalles Bibliográficos
Autores principales: Kainulainen, Kimmo, Prokopec, Tomislav, Schmidt, Michael G., Weinstock, Steffen
Lenguaje:eng
Publicado: 2002
Materias:
Particle Physics - Phenomenology
Acceso en línea:http://cds.cern.ch/record/535724
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author Kainulainen, Kimmo
Prokopec, Tomislav
Schmidt, Michael G.
Weinstock, Steffen
author_facet Kainulainen, Kimmo
Prokopec, Tomislav
Schmidt, Michael G.
Weinstock, Steffen
author_sort Kainulainen, Kimmo
collection CERN
description We consider the dynamics of fermions with a spatially varying mass which couple to bosons through a Yukawa interaction term and perform a consistent weak coupling truncation of the relevant kinetic equations. We then use a gradient expansion and derive the CP-violating source in the collision term for fermions which appears at first order in gradients. The collisional sources together with the semiclassical force constitute the CP-violating sources relevant for baryogenesis at the electroweak scale. We discuss also the absence of sources at first order in gradients in the scalar equation, and the limitations of the relaxation time approximation.
id cern-535724
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2002
record_format invenio
spelling cern-5357242023-03-14T18:50:24Zhttp://cds.cern.ch/record/535724engKainulainen, KimmoProkopec, TomislavSchmidt, Michael G.Weinstock, SteffenSome aspects of collisional sources for electroweak baryogenesisParticle Physics - PhenomenologyWe consider the dynamics of fermions with a spatially varying mass which couple to bosons through a Yukawa interaction term and perform a consistent weak coupling truncation of the relevant kinetic equations. We then use a gradient expansion and derive the CP-violating source in the collision term for fermions which appears at first order in gradients. The collisional sources together with the semiclassical force constitute the CP-violating sources relevant for baryogenesis at the electroweak scale. We discuss also the absence of sources at first order in gradients in the scalar equation, and the limitations of the relaxation time approximation.We consider the dynamics of fermions with a spatially varying mass which couple to bosons through a Yukawa interaction term and perform a consistent weak coupling truncation of the relevant kinetic equations. We then use a gradient expansion and derive the CP-violating source in the collision term for fermions which appears at first order in gradients. The collisional sources together with the semiclassical force constitute the CP-violating sources relevant for baryogenesis at the electroweak scale. We discuss also the absence of sources at first order in gradients in the scalar equation, and the limitations of the relaxation time approximation.hep-ph/0201245HD-TH-01-48CERN-TH-2002-010CERN-TH-2002-010HD-THEP-2001-48NORDITA-2002-03-HEoai:cds.cern.ch:5357242002-01-25
spellingShingle Particle Physics - Phenomenology
Kainulainen, Kimmo
Prokopec, Tomislav
Schmidt, Michael G.
Weinstock, Steffen
Some aspects of collisional sources for electroweak baryogenesis
title Some aspects of collisional sources for electroweak baryogenesis
title_full Some aspects of collisional sources for electroweak baryogenesis
title_fullStr Some aspects of collisional sources for electroweak baryogenesis
title_full_unstemmed Some aspects of collisional sources for electroweak baryogenesis
title_short Some aspects of collisional sources for electroweak baryogenesis
title_sort some aspects of collisional sources for electroweak baryogenesis
topic Particle Physics - Phenomenology
url http://cds.cern.ch/record/535724
work_keys_str_mv AT kainulainenkimmo someaspectsofcollisionalsourcesforelectroweakbaryogenesis
AT prokopectomislav someaspectsofcollisionalsourcesforelectroweakbaryogenesis
AT schmidtmichaelg someaspectsofcollisionalsourcesforelectroweakbaryogenesis
AT weinstocksteffen someaspectsofcollisionalsourcesforelectroweakbaryogenesis

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