252 citations · 473 across the 23 of their papers we have counts for
23 papers
Importance of unitarity in the search for heavy neutrinos in
G. A. Chachava, S. I. Godunov
We study the process with the aim of estimating the prospects for observing heavy neutrinos contributions at future -colliders. In this work, we conside…
Correction to -asymmetry in decays due to the admixture of in a -even state
N. A. Panchenko, S. I. Godunov
pairs from decays are in -odd state. However, there is a small admixture of the -even state and it modifies the time dependent -asymmetry. The -even…
On production of heavy charged particles in fusion at planned colliders
S. I. Godunov, E. K. Karkaryan, V. A. Novikov +3
Production of heavy fermions in ultraperipheral collisions () and the semiexclusive reaction () is considered.…
libepa -- a C++/Python library for calculations of cross sections of ultraperipheral collisions
E. V. Zhemchugov, S. I. Godunov, E. K. Karkaryan +3
The library provides a set of C++/Python functions for computing cross sections of ultraperipheral collisions of high energy particles under the equivalent photons approximation. C…
Weak interaction corrections to muon pair production via the photon fusion at the LHC
S. I. Godunov, E. K. Karkaryan, V. A. Novikov +3
Analytical formulas describing the correction due to the boson exchange to the cross section of the reaction are presented. When the invariant mass of…
scattering at the LHC with the lepton pair production and one proton tagging
S. I. Godunov, E. K. Karkaryan, V. A. Novikov +3
Analytical formulas for the cross section of the reaction are presented. Fiducial cross sections are compared with those measured recently by the ATL…
Forward proton scattering in association with muon pair production via the photon fusion mechanism at the LHC
S. I. Godunov, E. K. Karkaryan, V. A. Novikov +3
Dilepton production in proton-proton collision through -fusion with one proton scattered elastically while the second produces a hadron jet is considered. Semi-analytical formu…
Production of heavy charged particles in proton-proton ultraperipheral collisions at the Large Hadron Collider: survival factor
S. I. Godunov, V. A. Novikov, A. N. Rozanov +2
Ultraperipheral collisions of high energy protons are a source of approximately real photons colliding with each other. Photon fusion can result in production of yet unknown charge…
LHC as a photon-photon collider: bounds on
S. I. Godunov, E. K. Karkaryan, V. A. Novikov +3
In the relatively recent CMS data, there is a hint on the existence of a resonance with the mass 28 GeV coupling to muons. Such a resonance should also couple to photons through th…
Quasistable charginos in ultraperipheral proton-proton collisions at the LHC
S. I. Godunov, V. A. Novikov, A. N. Rozanov +2
We propose a model-independent approach for the search of charged long-lived particles produced in ultraperipheral collisions at the LHC. The main idea is to improve event reconstr…
Dimuon resonance near 28 GeV and muon anomaly
S. I. Godunov, V. A. Novikov, M. I. Vysotsky +1
We discuss if the resonance recently observed by CMS can be responsible for the deviation of the experimentally measured muon anomalous magnetic moment from the theoretical predict…
Evolution of thick domain walls in inflationary and universe
A. D. Dolgov, S. I. Godunov, A. S. Rudenko
We study the evolution of thick domain walls in the different models of cosmological inflation, in the matter-dominated and radiation-dominated universe, or more generally in the u…
Resonances in positron scattering on a supercritical nucleus and spontaneous production of pairs
S. I. Godunov, B. Machet, M. I. Vysotsky
We re-examine the physics of supercritical nuclei, specially focusing on the scattering phase and its dependence on the energy of the diving electroni…
Spatial structure of the modified Coulomb potential in a superstrong magnetic field
S. I. Glazyrin, S. I. Godunov
The modification of the Coulomb potential due to the enhancement of loop corrections in a superstrong magnetic field is studied numerically. We calculate the modified potential wit…
New Physics at 1 TeV?
S. I. Godunov, A. N. Rozanov, M. I. Vysotsky +1
If decays of a heavy particle S are responsible for the diphoton excess with invariant mass 750 GeV observed at the 13 TeV LHC run, it can be easily accomodated in the Standard Mod…
Separated matter and antimatter domains with vanishing domain walls
A. D. Dolgov, S. I. Godunov, A. S. Rudenko +1
We present a model of spontaneous (or dynamical) C and CP violation where it is possible to generate domains of matter and antimatter separated by cosmologically large distances. S…
Suppression of decay channels in the Georgi-Machacek model
S. I. Godunov, M. I. Vysotsky, E. V. Zhemchugov
The decay mode is usually considered as one of the most promising ways to discover new heavy neutral scalar . We show that in the Georgi-Machacek model it is possible…
Extending the Higgs sector: an extra singlet
S. I. Godunov, A. N. Rozanov, M. I. Vysotsky +1
An extension of the Standard Model with an additional Higgs singlet is analyzed. Bounds on singlet admixture in 125 GeV h boson from electroweak radiative corrections and data on h…
Double Higgs production at LHC, see-saw type II and Georgi-Machacek model
S. I. Godunov, M. I. Vysotsky, E. V. Zhemchugov
The double Higgs production in the models with isospin-triplet scalars is studied. It is shown that in the see-saw type II model the mode with an intermediate heavy scalar, $pp\to…
The dependence of the atomic energy levels on a superstrong magnetic field with account of a finite nucleus radius and mass
S. I. Godunov, M. I. Vysotsky
The influence of the finiteness of the proton radius and mass on the energies of a hydrogen atom and hydrogen-like ions in a superstrong magnetic field is studied. The finiteness o…
Charmed penguin versus BAU
A. D. Dolgov, S. I. Godunov, A. N. Rozanov +1
Since the Standard Model most probably cannot explain the large value of CP asymmetries recently observed in D-meson decays we propose the fourth quark-lepton generation explanatio…
Critical nucleus charge in a superstrong magnetic field: effect of screening
S. I. Godunov, B. Machet, M. I. Vysotsky
A superstrong magnetic field stimulates the spontaneous production of positrons by naked nuclei by diminishing the value of the critical charge Z_{cr} . The phenomenon of screening…
Neutrino Oscillations in Gravitational Field
S. I. Godunov, G. S. Pastukhov
We calculate the gravitational correction to the phase difference between neutrino mass eigenstates. There is a number of papers, where this correction was calculated for the spher…