Orateur
Károly Seller
(ELTE Eötvös Loránd University)
Description
The super-weak model is a particle physics model which extends the Standard Model (SM) by a new U(1) gauge symmetry. In addition to the new mediator 𝑍′, a scalar particle 𝜒 is added to deal with the meta-stability of the SM vacuum, and right-handed neutrinos are introduced to account for the non-vanishing neutrino masses. In this talk, we investigate the cosmological implications of such an extension with our main focus being on dark matter production. We find that a light -- mass of (10) MeV -- sterile neutrino can play the role of dark matter with a non-vanishing parameter space. We investigate present experimental bounds on the model parameters, both from particle physics experiments as well as from astrophysical observations.
