47 citations · 267 across the 20 of their papers we have counts for
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Suppression exponent for multiparticle production in theory
S. V. Demidov, B. R. Farkhtdinov, D. G. Levkov
We compute the probability of producing particles from few colliding particles in the unbroken -dimensional theory. To this end we numerically implement semiclass…
Numerical study of multiparticle production in theory: comparison with analytic results
S. V. Demidov, B. R. Farkhtdinov, D. G. Levkov
We develop a numerical method to compute the probabilities of multiparticle production in weakly coupled scalar theories. Our technique is based on D.T. Son's semiclassical method…
Gravitational waves from first-order electroweak phase transition in a model with light sgoldstinos
S. Demidov, D. Gorbunov, E. Kriukova
We study previously unexplored possibility of triggering the first order electroweak phase transition (EWPT) by interactions of the Standard Model (SM) particles with the sector re…
Light hidden photon production in high energy collisions
S. Demidov, S. Gninenko, D. Gorbunov
The visible and dark sectors of particle physics can be connected via kinetic mixing between ordinary and hidden photons. If the latter is light its production in high energy colli…
Gravitational waves from phase transition in split NMSSM
S. V. Demidov, D. S. Gorbunov, D. V. Kirpichnikov
We discuss gravitational wave signal from the strongly first order electroweak phase transition in the split NMSSM. We find that for sets of parameters predicting successful electr…
Non-standard interactions and neutrinos from dark matter annihilation in the Sun
S. V. Demidov
We perform an analysis of the influence of non-standard neutrino interactions (NSI) on neutrino signal from dark matter annihilations in the Sun. Taking experimentally allowed benc…
Lepton flavor-violating decays of the Higgs boson from sgoldstino mixing
S. V. Demidov, I. V. Sobolev
We study lepton flavor violation in a class of supersymmetric models with light sgoldstino - scalar superpartner of Goldstone fermions responsible for spontaneous supersymmetry bre…
High-energy limit of collision-induced false vacuum decay
Sergei Demidov, Dmitry Levkov
We develop a consistent semiclassical description of field-theoretic collision-induced tunneling at arbitrary high collision energies. As a playground we consider a (1+1)-dimension…
Positronium oscillations to Mirror World revisited
S. V. Demidov, D. S. Gorbunov, A. A. Tokareva
We present a calculation of the branching ratio of orthopositronium decay into an invisible mode, which is done in the context of Mirror World models, where ordinary positronium ca…
Invisible Higgs in weak bosons associative production with heavy quarks at LHC: probing mass and width
E. E. Boos, S. V. Demidov, D. S. Gorbunov
New physics coupled to the Higgs boson may hide it in the standard decay channels to be investigated at LHC. We consider the models where new invisible dominant decay modes of the…
Annihilation of NMSSM neutralinos in the Sun and neutrino telescope limits
Sergei Demidov, Olga Suvorova
We investigate neutralino dark matter in the framework of NMSSM performing a scan over its parameter space and calculating neutralino capture and annihilation rates in the Sun. We…