67 citations · 441 across the 22 of their papers we have counts for
7 papers · 1 filter
Heating up Peccei-Quinn scale
Sabir Ramazanov, Rome Samanta
We discuss production of QCD axion dark matter in a novel scenario, which assumes time-varying scale of Peccei-Quinn symmetry breaking. The latter decreases as the Universe's tempe…
Gravitational waves from melting cosmic strings
William T. Emond, Sabir Ramazanov, Rome Samanta
Appearance of cosmic strings in the early Universe is a common manifestation of new physics typically linked to some high energy scale. In this paper, we discuss a different situat…
Gravitational reheating and superheavy Dark Matter creation after inflation with non-minimal coupling
E. Babichev, D. Gorbunov, S. Ramazanov +1
We discuss the gravitational creation of superheavy particles in an inflationary scenario with a quartic potential and a non-minimal coupling between the inflaton and the R…
Gravitational misalignment mechanism of Dark Matter production
Eugeny Babichev, Dmitry Gorbunov, Sabir Ramazanov
We consider Dark Matter composed of an oscillating singlet scalar field. On top of the mass term, the scalar is equipped with a potential spontaneously breaking Z_2-symmetry. This…
New mechanism of producing superheavy Dark Matter
Eugeny Babichev, Dmitry Gorbunov, Sabir Ramazanov
We study in detail the recently proposed mechanism of generating superheavy Dark Matter with the mass larger than the Hubble rate at the end of inflation. A real scalar field const…
Standard Model in adS slice with UV-localized Higgs field
Sergey Mironov, Mikhail Osipov, Sabir Ramazanov
We discuss five-dimensional Standard Model in a slice of adS space-time with the Higgs field residing near or on the UV brane. Allowing fermion fields to propagate in the bulk, we…