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The helicity changing Cerenkov radiation in a supernova core was used earlier to put a restrictive bound on the neutrino magnetic moment. Subsequently it was pointed out, that this result was based on a numerical error in the calculationn…

High Energy Physics - Phenomenology · Physics 2007-05-23 Subhendra Mohanty , Sarira Sahu

We calculate the nucleon contribution to the photon self-energy in a plasma, including the effect of the anomalous magnetic moment of the nucleons. General formulas for the transverse and longitudinal components of the self-energy are…

High Energy Physics - Phenomenology · Physics 2009-10-30 Juan Carlos D'Olivo , Jose F. Nieves

We calculate the Cherenkov process nu -> nu+photon in the presence of a homogeneous magnetic field. The neutrinos are taken to be massless with only standard-model couplings. The magnetic field fulfills the dual purpose of inducing an…

High Energy Physics - Phenomenology · Physics 2016-08-24 Ara N. Ioannisian , Georg G. Raffelt

Neutrinos with a magnetic dipole moment propagating in a medium with a velocity larger than the phase velocity of light emit photons by the Cerenkov process. The Cerenkov radiation is a helicity flip process via which a left-handed neutrino…

High Energy Physics - Phenomenology · Physics 2009-10-28 Subhendra Mohanty , Manoj K. Samal

Neutrinos with a magnetic moment $\mu$ change their helicity when interacting with an electromagnetic field. Various aspects of this effect have been described as spin precession, spin-flip scattering, and magnetic Cherenkov radiation.…

High Energy Physics - Phenomenology · Physics 2008-11-26 Per Elmfors , Kari Enqvist , Georg Raffelt , Günter Sigl

We show that in a supernova core the longitudinal photon (plasmon) has a space-like dispersion and Cerenkov absorption and emission of such photons is kinematically allowed. If the neutrino has a non-zero magnetic moment, then helicity…

High Energy Physics - Phenomenology · Physics 2007-05-23 Subhendra Mohanty , Sarira Sahu

We discuss the Cherenkov process $\nu\to\nu\gamma$ in the presence of a homogeneous magnetic field. The neutrinos are taken to be massless with only standard-model couplings. The magnetic field fulfills the dual purpose of inducing an…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. Ioannisian , G. Raffelt

The neutrino chirality-flip process under the conditions of the supernova core is investigated in detail with the plasma polarization effects in the photon propagator taken into account, in a more consistent way than in earlier…

High Energy Physics - Phenomenology · Physics 2009-11-13 Alexander V. Kuznetsov , Nickolay V. Mikheev

The neutrino chirality-flip process under the conditions of the supernova core is investigated in detail with the plasma polarization effects in the photon propagator taken into account in a more complete form than in earlier publications.…

High Energy Physics - Phenomenology · Physics 2007-08-22 A. V. Kuznetsov , N. V. Mikheev

While the photon forward-scattering amplitude on free magnetic dipoles (e.g. free neutrons) vanishes, the nucleon magnetic moments still contribute significantly to the photon dispersion relation in a supernova (SN) core where the nucleon…

Astrophysics · Physics 2009-10-30 A. Kopf , G. Raffelt

For neutrinos with a magnetic moment, we show that the collisions in a hot and dense plasma act as an efficient mechanism for the conversion of $\nu_L$ into $\nu_R$. The production rate for right-handed neutrinos is computed in terms of a…

High Energy Physics - Phenomenology · Physics 2008-11-26 Alejandro Ayala , Juan Carlos D'Olivo , Manuel Torres

An influence of a magnetic field on beta-processes is investigated under conditions of a core-collapse supernova. For realistic magnetic fields reachable in astrophysical objects we obtain simple analytical expressions for reaction rates of…

High Energy Astrophysical Phenomena · Physics 2020-04-08 Alexandra Dobrynina , Igor Ognev

The neutrino chirality-flip process under the conditions of the supernova core is investigated in detail with the plasma polarization effects in the photon propagator taken into account. It is shown that the contribution of the proton…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. V. Kuznetsov , N. V. Mikheev

We explore the impact of magnetic field on neutrino-matter interactions in core-collapse supernova. We first derive the modified source terms for neutrino-nucleon scattering and neutrino absorption and emission processes in the moment…

High Energy Astrophysical Phenomena · Physics 2021-01-27 Takami Kuroda

The influence of strongly magnetized electron-positron plasma on the radiative neutrino transition $\nng$ is investigated. The probability and mean losses of the neutrino energy and momentum are calculated taking account of the photon…

High Energy Physics - Phenomenology · Physics 2009-10-31 M. V. Chistyakov , N. V. Mikheev

Due to their weak interactions, neutrinos can polarize a medium and acquire an induced charge. We consider the Cherenkov radiation emitted by neutrinos due to their effective electromagnetic interactions as they pass through a polarizable…

High Energy Physics - Phenomenology · Physics 2014-11-17 Juan Carlos D'Olivo , Jose F. Nieves , Palash B. Pal

Here I review some nuclear physics aspects of core-collapse supernovae concerning neutrinos. Studies of neutrino emission and interactions in supernovae are crucial to our understanding of the explosion mechanism, the heavy element…

Astrophysics · Physics 2007-05-23 Yong-Zhong Qian

Collective interactions of a beam of neutrinos/antineutrinos traversing a dense magnetized plasma of electrons/positrons, protons and neutrons are studied with particular reference to the case of a Supernova. We find that the ponderomotive…

High Energy Physics - Phenomenology · Physics 2009-10-31 S. Esposito

We study the impacts of magnetic field on the neutrino transport inside core-collapse supernovae (CCSNe). Magnetic field quantizes the momentum of electrons and positrons, resulting in the modification of weak-interaction cross sections and…

High Energy Astrophysical Phenomena · Physics 2024-05-21 Yudong Luo , Shuai Zha , Toshitaka Kajino

The Cherenkov radiation of magnons at passage of the heavy slow magnetic monopole through an ordered magnetic matter is considered. Also the Cherenkov radiation of phonons at monopole movement in medium is discussed.

High Energy Physics - Phenomenology · Physics 2015-06-25 I. V. Kolokolov , P. V. Vorob'ev
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