Enhancement of the Transition Magnetic Moments of a Neutrino by Degenerate Electrons
Abstract
The one-loop induced magnetic dipole moments of a neutrino are examined in a background of degenerate electrons in the standard model. For the nonrelativistic neutrino, they are enhanced by a factor \( (8/3) \), where \ is the electron Fermi momentum and \ the neutrino mass. For the relativistic neutrino, they enhance the flavor-changing but helicity-conserving process because of the absence of the GIM cancellation.
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