Abstract
The radiative decay of sterile neutrinos with typical masses of 10 keV is investigated in the presence of an external magnetic field and degenerate electron plasma. Full account is taken of the modified photon dispersion relation relative to vacuum. The limiting cases of relativistic and nonrelativistic plasma are analyzed. The decay rate calculated in a strongly magnetized plasma, as a function of the electron number density, is compared with the unmagnetized plasma limit. It is found that the presence of the strong magnetic field in the electron plasma suppresses the catalyzing influence of the plasma by itself on the sterile-neutrino decay rate.
Highlights
It is not a secret that stars as laboratories for fundamental physics complement an effort from the existing accelerator facilities on particle physics
The radiative decay of sterile neutrinos with typical masses of 10 keV is investigated in the presence of an external magnetic field and degenerate electron plasma
It is found that the presence of the strong magnetic field in the electron plasma suppresses the catalyzing influence of the plasma by itself on the sterile-neutrino decay rate
Summary
It is not a secret that stars as laboratories for fundamental physics complement an effort from the existing accelerator facilities on particle physics. Recent simulations of core-collapse supernovae [5,6,7] and the formation of accretion discs at the merger of compact objects in a close binary system [8, 9] demonstrate that the magnetic field strength could reach the value of B ∼ 1015 Gauss. All these phenomena are different, they are connected with a powerful neutrino emission. The results obtained in [26] are briefly presented in this contribution
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