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Neutrino magnetic moment1/1/2023 Starting from the Dirac equation, a g-factor g 2 has been deduced for a neutrino in. The gravitomagnetic moment, i.e., the magnetic moment from gravitational origin, may contain different g-factors for the massive neutrino eigenstates m 1, m 2 and m 3, respectively. By calculating the radiative corrections to such an annihilation process, we show that the positrons produced would necessarily be accompanied by a flux of (“internal bremsstrahlung”) gamma rays, of sufficient magnitude to exceed the observed galactic diffuse gamma ray flux, unless the dark matter mass is less than about 20 MeV. The neutron magnetic moment is the intrinsic magnetic dipole moment of the neutron, symbol n. magnetic moment can be combined, yielding the value of the neutrino mass. Moreover, we show that for the case of random magnetic fields inside the Sun, one obtains a more stringent constraint on the neutrino magnetic moment down to. This motivates the recent suggestion that the positrons are produced instead by the annihilation of light (1-100 MeV) dark matter particles in the Galactic halo. The Galactic positron flux, observed as a 0.511 MeV annihilation line, is difficult to account for with astrophysical sources. Galactic Positrons and Annihilating Dark Matter: For Majorana neutrinos the magnetic moment contribution to the mass term is suppressed by Yukawa couplings, thus we do not exclude the possibility of detecting a magnetic moment experimentally. For Dirac neutrinos we find a bound several orders of magnitude more stringent than present experimental limits. Of the neutrino, an evanescent chargeless form of energy first. We derive model-independent upper bounds on neutrino magnetic moments generated by physics above the electroweak scale. However, experiments on the spin, magnetic moment, and magnetic moment anomaly have. The magnetic dipole moment of neutrinos is modified at high temperature and. However, the existence of a neutrino magnetic moment implies contributions to the neutrino mass via electroweak radiative corrections. We recalculate the magnetic moment of neutrinos in a hot and dense medium. The explicit evalu- ation of the one-loop contributions to the Dirac neutrino magnetic moment in the leading approx- imation over small parameters b i m 2 i M 2 W (m i are the neutrino masses, i 1,2, 3. Neutrino magnetic moment ( MM) is an important property of massive neutrinos. Neutrino magnetic moment in a minimal ex- tension of Standard Model. There- fore, neutrino magnetic moments can be used to distinguish Dirac and Majorana neutrinos (see 3 and also 2 for a detailed discussion). The detection of a neutrino magnetic moment comparable to present limits would be an unequivocal indication of physics beyond the Standard Model. For a Majorana neutrino the diagonal magnetic and electric moments are zero. Neutrino Magnetic Moments/ Galactic Positrons and Annihilating Dark Matter – Nicole Bell Date: Fri.
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