Particle Physics and Cosmology Phase transitions baryogenesis during

Particle Physics and Cosmology Phase transitions

baryogenesis during electroweak phase transition ?

Sakharov’s conditions for baryogenesis during electroweak phase transition 1) 2) 3) 4) baryon number violation interactions ☺ charge conjugation violating interactions ☺ CP – violating interactions ☺ non – equilibrium process ☺

baryogenesis during electroweak phase transition ? strongly first order electroweak phase transition can generate baryon asymmetry if CP violation is sufficiently strong n no efficient baryogenesis for weak first order phase transition, second order phase transition or crossover n presumably too little CP violation in SM ( not definitely settled ) n

electroweak phase transition

order of phase transition

temperature dependent effective potential T=0 high temperature expansion

next to leading order in high temperature expansion

first order cosmological phase transitions

chaos in the Universe

relics from cosmological first order phase transitions ?

electroweak crossover

critical mass of the Higgs scalar for the onset of crossover

electroweak “phase transition “ in standard model is crossover ! perhaps strong first order transition in supersymmetric extensions of standard model

standard model of particle physics and cosmology n no candidate for dark matter n no baryon asymmetry n no massive neutrinos

standard model of particle physics and cosmology prediction : present Universe consists of photons and massless neutrinos