A.V. Kuznetsov
Yaroslavl State University
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Featured researches published by A.V. Kuznetsov.
Physics Letters B | 1997
A.V. Kuznetsov; N. V. Mikheev
Abstract The process of electron-positron pair production by neutrino propagating in a strong magnetic field is investigated in the framework of the Standard Model. The process probability and the mean values of the neutrino energy and momentum loss are calculated. Possible astrophysical manifestations of the process considered are briefly analysed.
Physics Letters B | 1998
M.V. Chistyakov; A.V. Kuznetsov; N. V. Mikheev
Abstract The process of photon splitting γ → γγ in a strong magnetic field is investigated both below and above the pair creation threshold. Contrary to the statement by Baier et al., the “allowed” channel γ ‖ → γ ⊥ γ ⊥ is shown not to be a comprehensive description of splitting in the strong field because the “forbidden” channel γ ‖ → γ ‖ γ ⊥ is also essential. The partial amplitudes and the splitting probabilities are calculated taking account of the photon dispersion and large radiative corrections near the resonance.
International Journal of Modern Physics A | 2012
A.V. Kuznetsov; N. V. Mikheev; A. V. Serghienko
The low-energy manifestations of a minimal extension of the electroweak standard model based on the quark–lepton symmetry SU(4)V ⊗SU(2)L ⊗GR of the Pati–Salam-type are analyzed. Given this symmetry the third type of mixing in the interactions of the SU(4)V leptoquarks with quarks and leptons is shown to be required. An additional arbitrariness of the mixing parameters could allow, in principle, to decrease noticeably the lower bound on the vector leptoquark mass originated from the low-energy rare processes, strongly suppressed in the standard model.
Physics Letters B | 2010
A.V. Kuznetsov; N. V. Mikheev; A.V. Serghienko
An influence of a strong external magnetic field on the neutrino self-energy operator is investigated. The width of the neutrino decay into the electron and W boson, and the mean free path of an ultra-high energy neutrino in a strong magnetic field are calculated. A kind of energy cutoff for neutrinos propagating in a strong field is defined.
Physics Letters B | 1998
A.V. Kuznetsov; N. V. Mikheev; L.A. Vassilevskaya
The process of the photon decay into the neutrino - antineutrino pair in a magnetic field is investigated. The amplitude and the probability are analysed in the limits of relatively small and strong fields. The probability is suppressed by a factor (G_F m^2_e)^2 as compared with the probability of the pure electromagnetic process gamma -> e- e+. However, the process with neutrinos could play a role of an additional channel of stellar energy-loss.Abstract The process of the photon splitting into the neutrino-antineutrino pair in a magnetic field is investigated. The amplitude and the probability are analysed in the limits of relatively small and strong fields. The probability is suppressed by a factor ( G F m e 2 ) 2 as compared with the probability of the pure electromagnetic process γ → e − e + . However, the process with neutrinos could play a role of an additional channel of stellar energy-loss.
Physics Letters B | 1997
A.V. Kuznetsov; L.A. Vassilevskaya; N. V. Mikheev
The process of the photon decay into the neutrino - antineutrino pair in a magnetic field is investigated. The amplitude and the probability are analysed in the limits of relatively small and strong fields. The probability is suppressed by a factor (G_F m^2_e)^2 as compared with the probability of the pure electromagnetic process gamma -> e- e+. However, the process with neutrinos could play a role of an additional channel of stellar energy-loss.Abstract The process of the photon splitting into the neutrino-antineutrino pair in a magnetic field is investigated. The amplitude and the probability are analysed in the limits of relatively small and strong fields. The probability is suppressed by a factor ( G F m e 2 ) 2 as compared with the probability of the pure electromagnetic process γ → e − e + . However, the process with neutrinos could play a role of an additional channel of stellar energy-loss.
Physics Letters B | 1995
A.A. Gvozdev; A.V. Kuznetsov; N. V. Mikheev; L.A. Vassilevskaya
The decays
Surveys in High Energy Physics | 2001
M.V. Chistyakov; A.V. Kuznetsov; N. V. Mikheev
mu rightarrow e gamma
Physics Letters B | 1998
A.V. Kuznetsov; N. V. Mikheev; L.A. Vassilevskaya
,
Physics Letters B | 1998
A.V. Kuznetsov; N. V. Mikheev; L.A. Vassilevskaya
mu rightarrow e gamma gamma
