Publications (42)
Galileon bounce after ekpyrotic contraction
M. Osipov, V. Rubakov
We consider a simple cosmological model that includes a long ekpyrotic contraction stage and smooth bounce after it. Ekpyrotic behavior is due to a scalar field with a negative exp…
Suppression of baryon number violation in electroweak collisions: Numerical results
F. Bezrukov, D. Levkov, C. Rebbi +2
We present a semiclassical study of the suppression of topology changing, baryon number violating transitions induced by particle collisions in the electroweak theory. We find that…
Cosmological phase transition, baryon asymmetry and dark matter Q-balls
E. Krylov, A. Levin, V. Rubakov
We consider a mechanism of dark matter production in the course of first order phase transition. We assume that there is an asymmetry between X- and anti-X-particles of dark sector…
Conformal Universe as false vacuum decay
M. Libanov, V. Rubakov
We point out that the (pseudo-)conformal Universe scenario may be realized as decay of conformally invariant, metastable vacuum, which proceeds via spontaneous nucleation and subse…
Scalar tilt from broken conformal invariance
V. Rubakov, M. Osipov
Within recently proposed scenario which explains flatness of the spectrum of scalar cosmological perturbations by a combination of conformal and global symmetries, we discuss the e…
Superluminality in the Fierz--Pauli massive gravity
M. Osipov, V. Rubakov
We study the propagation of helicity-1 gravitons in the Fierz--Pauli massive gravity in nearly Minkowski backgrounds. We show that, generically, there exist backgrounds consistent…