67 citations · 441 across the 22 of their papers we have counts for
6 papers · 1 filter
Observing primordial magnetic fields through Dark Matter
Sabir Ramazanov, Federico R. Urban, Alexander Vikman
Primordial magnetic fields are often thought to be the early Universe seeds that have bloomed into what we observe today as galactic and extra-galactic magnetic fields. Owing to th…
Affleck-Dine baryogenesis via mass splitting
Eugeny Babichev, Dmitry Gorbunov, Sabir Ramazanov
We introduce a class of non-supersymmetric models explaining baryogenesis a la Affleck-Dine, which use a decay of two superheavy scalar fields with close masses. These scalars acqu…
Dark Matter and Baryon Asymmetry from the very Dawn of Universe
Eugeny Babichev, Dmitry Gorbunov, Sabir Ramazanov
We propose a universal mechanism of producing dark matter and baryon (lepton) charge at the stage of the quasi-de Sitter expansion of the Universe---inflation. The key ingredient o…
General quadrupolar statistical anisotropy: Planck limits
S. Ramazanov, G. Rubtsov, M. Thorsrud +1
Several early Universe scenarios predict a direction-dependent spectrum of primordial curvature perturbations. This translates into the violation of the statistical isotropy of cos…
Modified Dust and the Small Scale Crisis in CDM
Fabio Capela, Sabir Ramazanov
At large scales and for sufficiently early times, dark matter is described as a pressureless perfect fluid---dust---non-interacting with Standard Model fields. These features are c…
Effect of intermediate Minkowskian evolution on CMB bispectrum
S. A. Mironov, S. R. Ramazanov, V. A. Rubakov
We consider a non-inflationary early Universe scenario in which relevant scalar perturbations get frozen out at some point, but then are defrosted and follow a long nearly Minkowsk…