baryogenesis during baryogenesis during electroweak phase electroweak phase
transition ?transition ?
Sakharov’s conditions forSakharov’s conditions forbaryogenesis during baryogenesis during electroweak phase electroweak phase
transitiontransition
1)1) baryon number violation interactions ☺baryon number violation interactions ☺
2)2) charge conjugation violating charge conjugation violating interactions ☺interactions ☺
3)3) CP – violating interactions ☺CP – violating interactions ☺
4)4) non – equilibrium process ☺non – equilibrium process ☺
baryogenesis during baryogenesis during electroweak phase electroweak phase
transition ?transition ? strongly first order electroweak strongly first order electroweak
phase transition can generate baryon phase transition can generate baryon asymmetry if CP violation is asymmetry if CP violation is sufficiently strong sufficiently strong
no efficient baryogenesis for weak no efficient baryogenesis for weak first order phase transition, second first order phase transition, second order phase transition or crossoverorder phase transition or crossover
presumably too little CP violation in presumably too little CP violation in SM ( not definitely settled )SM ( not definitely settled )
temperature dependent temperature dependent effective potentialeffective potential
T = 0T = 0
high high temperaturetemperature
expansionexpansion
next to leading order in next to leading order in high temperature high temperature
expansionexpansion
relics from cosmological relics from cosmological first order phase transitions first order phase transitions
??
critical mass of the Higgs critical mass of the Higgs scalar for the onset of scalar for the onset of
crossovercrossover
electroweak “phase electroweak “phase transition “transition “
in standard model is in standard model is crossover !crossover !
perhaps strong first order transition in perhaps strong first order transition in supersymmetric extensions of standard model supersymmetric extensions of standard model
standard model of particle standard model of particle physics and cosmologyphysics and cosmology
no candidate for dark matterno candidate for dark matter no baryon asymmetryno baryon asymmetry no massive neutrinosno massive neutrinos
standard model of particle standard model of particle physics and cosmologyphysics and cosmology
prediction :prediction :
present Universe consists ofpresent Universe consists of
photons and photons and
massless neutrinosmassless neutrinos