Papers by Michael Chistyakov
EPJ Web of Conferences, 2017
The process of neutrino photoproduction on an electron, eγ → eνν, in a strongly magnetized cold p... more The process of neutrino photoproduction on an electron, eγ → eνν, in a strongly magnetized cold plasma in resonant case has been considered. The contribution of this process to the neutrino emissivity has been calculated. It has been shown that under such conditions neutrino emissivity due to process eγ → eνν could be expressed in terms of emissivity of it's subprocess, e → eνν.
Journal of Experimental and Theoretical Physics, 2014
Surveys in High Energy Physics, 2003
The two-photon two-neutrino interaction induced by magnetic field is investigated. In particular ... more The two-photon two-neutrino interaction induced by magnetic field is investigated. In particular the processes γγ → νν and γ → γνν are studied in the presence of strong magnetic field. An effective Lagrangian and partial amplitudes of the processes are presented. Neutrino emissivities due to the reactions γγ → νν and γ → γνν are calculated taking into account of the photon dispersion and large radiative corrections. A comparison of the results obtained with previous estimations and another inducing mechanisms of the processes under consideration is made.
The photon-neutrino process γγ → νν and photon splitting are considered in a strong magnetic fiel... more The photon-neutrino process γγ → νν and photon splitting are considered in a strong magnetic field. The partial polarization amplitudes are calculated within the standard model in the limit of a strong field. The amplitudes do not depend on the field strength in this limit. Using the vector parts of the amplitudes, the process of the photon splitting γ → γγ is investigated both below and above the pair creation threshold. The splitting probabilities are calculated taking account of the photon dispersion and large radiative corrections near the resonance.
Physics of Atomic Nuclei, 2009
The photon-scattering process γe ± → γe ± is considered in strongly magnetized matter at arbitrar... more The photon-scattering process γe ± → γe ± is considered in strongly magnetized matter at arbitrary values of temperature and an arbitrary chemical potential. Simple expressions for the absorption coefficients in a strongly magnetized plasma are obtained in two limiting cases, that of a rarefied chargesymmetric plasma and that of a degenerate plasma. Astrophysical applications of the results obtained here are discussed.
Physics Letters B, 1998
A process of the photon splitting γ → γγ in a strong magnetic field is investigated below and abo... more A process of the photon splitting γ → γγ in a strong magnetic field is investigated below and above the pair creation threshold. Contrary to the statement by Baier e.a., the "allowed" channel γ → γ ⊥ γ ⊥ is shown not to be comprehensive for the splitting in the strong field because the "forbidden" channel γ → γ γ ⊥ is also essential. The partial amplitudes and the splitting probabilities are calculated with taking account of the photon dispersion and large radiative corrections near the resonance.
Physics Letters B, 1999
The influence of strongly magnetized electron-positron plasma on the radiative neutrino transitio... more The influence of strongly magnetized electron-positron plasma on the radiative neutrino transition ν → νγ is investigated. The probability and mean losses of the neutrino energy and momentum are calculated taking account of the photon dispersion and large radiative corrections near the resonance. It is shown that the combined effect of plasma and strong magnetic field decreases the probability and mean values of the neutrino energy and momentum loss in comparison with these values obtained in pure magnetic field.
Physical Review D, 2012
The process of photon splitting is investigated in the presence of strongly magnetized electronpo... more The process of photon splitting is investigated in the presence of strongly magnetized electronpositron plasma. The amplitude of the process is calculated in the general case of plasma with nonzero chemical potential and temperature. The polarization selection rules and corresponding partial amplitudes for allowed splitting channels are obtained in the case of charge-symmetric plasma. It is found that the new splitting channel forbidden in magnetized vacuum becomes allowed. The absorption rates of the photon splitting are calculated with taking into account the photon dispersion and wave function renormalization. In addition, the comparison of photon splitting and Compton scattering process is made. The influence of the reactions under consideration on the radiation transfer in the framework of the magnet ar model of a soft gamma repeater burst is discussed.
Modern Physics Letters A, 2002
The two-photon two-neutrino interaction induced by magnetic field is investigated. In particular ... more The two-photon two-neutrino interaction induced by magnetic field is investigated. In particular the processes [Formula: see text] and [Formula: see text] are studied in the presence of strong magnetic field. An effective Lagrangian and partial amplitudes of the processes are presented. Neutrino emissivities due to the reactions [Formula: see text] and [Formula: see text] are calculated taking into account the photon dispersion and large radiative corrections. A comparison of the results obtained with previous estimations and another inducing mechanisms of the processes under consideration is made.
Journal of Experimental and Theoretical Physics, 2005
The photon splitting γ γγ in a strongly magnetized medium of arbitrary temperature and chemical p... more The photon splitting γ γγ in a strongly magnetized medium of arbitrary temperature and chemical potential is considered. In comparison with the case of a pure magnetic field, a new photon splitting channel is shown to be possible below the electron-positron pair production threshold. The partial splitting amplitudes and probabilities are calculated by taking into account the photon dispersion in a strong magnetic field and a chargesymmetric plasma. An enhancement of the photon splitting probability compared to the case of a magnetic field without plasma has been found to be possible under certain conditions.
Journal of Experimental and Theoretical Physics, 2008
The photon-neutrino processes γe ± → e ± νν, γ → νν and γγ → νν are investigated in the presence ... more The photon-neutrino processes γe ± → e ± νν, γ → νν and γγ → νν are investigated in the presence of a strongly magnetized and dense electron-positron plasma. The amplitudes of the reactions γe ± → e ± νν and γγ → νν are obtained. In the case of a cold degenerate plasma contributions of the considering processes to neutrino emissivity are calculated. It is shown that contribution of the process γγ → νν to neutrino emissivity is supressed in comparision with the contributions of the processes γe ± → e ± νν and γ → νν. The constraint on the magnetic field strength in the magnetar outer crust is obtained.
Journal of Experimental and Theoretical Physics Letters, 2001
Damping of an electromagnetic wave in a strong magnetic field is analyzed in the kinematic region... more Damping of an electromagnetic wave in a strong magnetic field is analyzed in the kinematic region near the threshold of electron-positron pair production. Damping of the electromagnetic field is shown to be noticeably nonexponential in this region. The resulting width of the photon γ → e + e − decay is considerably smaller than previously known results.
International Journal of Modern Physics A, 2009
The process of Compton scattering γe± → γe± in strongly magnetized hot and cold electron–positron... more The process of Compton scattering γe± → γe± in strongly magnetized hot and cold electron–positron plasma is considered. The analytical expressions for the partial cross-sections in rarefied plasma and the simple expressions for the photon absorption rates in degenerate plasma are obtained. The numerical estimations of the absorption rates for various scattering channels are presented taking into account of the photon dispersion and wave function renormalization in strong magnetic field and plasma. The comparison of the scattering absorption rate with photon splitting probability shows the existence of plasma parameters range where these values are comparable with each other.
The electromagnetic processes of Compton scattering and photon splitting/merging are investigated... more The electromagnetic processes of Compton scattering and photon splitting/merging are investigated in the presence of strongly magnetized electron-positron plasma. The influence of these processes on the radiation transfer in the astrophysical environment is studied. In particular, the contribution of the processes under consideration in coefficients of the transfer equation is calculated. We show the importance of photon splitting/merging contribution and taking into account of photon dispersion and wave function renormalization in strong magnetic field and plasma.
Uploads
Papers by Michael Chistyakov