Baryogenesis in the Zee-Babu model
Year: 2015
Type: preprint
Abstract: We consider the baryogenesis picture in the Zee-Babu model. Our analysis shows that electroweak phase transition (EWPT) in the model is a first-order phase transitions at the $100$ GeV scale, its strength is about $1 - 2.4$ and the values of $\lambda_{hH}$, $\lambda_{kH}$ are smaller than $1.3\pi$. The EWPT is strengthened by only the new bosons. The process of the EWPT kinetics corresponding to B violation which is received through the sphaleron probability. By a thin-wall approximation, the sphaleron rate is larger than the cosmological expansion rate at the temperature which is higher than the critical temperature, and after the phase transition, the sphaleron process is decoupled. This also suggests that the phase transition is a transition which depends at each point in space. This may provide baryon-number violation (B-violation) necessary for baryogenesis in the relationship with non-equilibrium physics in the early universe.
Source: arXiv (Cornell University)
Authors: Vo Quoc Phong, Nguyen Chi Thao, H. N. Long
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2117458381