منابع مشابه
Electroweak baryogenesis and standard model CP violation.
We analyze the mechanism of electroweak baryogenesis proposed by Farrar and Shaposhnikov in which the phase of the CKM mixing matrix is the only source of CP violation. This mechanism is based on a phase separation of baryons via the scattering of quasiparticles by the wall of an expanding bubble produced at the electroweak phase transition. In agreement with the recent work of Gavela, Hernánde...
متن کاملSpontaneous CP violation at the electroweak scale.
Utilizing results on the cosmology of anomalous discrete symmetries we show that models of spontaneous CP violation can in principle avoid the domain wall problem first pointed out by Zel’dovich, Kobzarev and Okun. A small but nonzero θQCD explicitly breaks CP and can lift the degeneracy of the two CP conjugate vacua through nonperturbative effects so that the domain walls become unstable, but ...
متن کاملBubble Walls , CP Violation and Electroweak Baryogenesis in the MSSM
We discuss the generation of the baryon asymmetry by a strong first order elec-troweak phase transition in the early universe, particularly in the context of the MSSM. This requires a thorough numerical treatment of the bubble wall profile in the case of two Higgs fields. CP violating complex particle masses varying with the Higgs field in the wall are essential. Since in the MSSM there is no i...
متن کاملHiggs Sector Cp - Violation at the Electroweak Phase Transition
We consider explicit and spontaneous CP-violation related to the profile of the two Higgs doublets at the MSSM electroweak phase transition. We find, in accordance with previous results, that in principle spontaneous CP-violation could exist in the MSSM at finite temperatures, but when the constraints from experiment and the strength of the transition are taken into account, the relevant region...
متن کاملElectroweak baryogenesis and CP violation from fourth generation
We address the electroweak baryogenesis in the standard model (SM) with a 4th generation (4G), dubbed SM4. One of the reasons, that the SM fails to explain the baryon asymmetry of the universe (BAU), is insufficiency of CP violation arising from the Kobayashi-Maskawa (KM) phase, while the 4G quarks introduces new CP violating phases still within the KM framework. An intuitive argument, using a ...
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ژورنال
عنوان ژورنال: Scholarpedia
سال: 2015
ISSN: 1941-6016
DOI: 10.4249/scholarpedia.11418