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# The XXX International Conference on Neutrino Physics and Astrophysics (Neutrino 2022)

30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

## A solar ν̄e flux: bounds on neutrino magnetic moments and the solar magnetic field revisited

Not scheduled
20m
Virtual Seoul

#### Virtual Seoul

Poster BSM searches in neutrinos

### Description

The interaction of neutrino magnetic moments with the solar magnetic field can give rise to the phenomenon of spin-flavour precesion. For Majorana neutrinos, the effect of spin-flavour precession together with flavour oscillations would manifest itself as a small, yet potentially detectable, flux of electron antineutrinos. The non-observation of such a flux can be used to constrain the product of the solar magnetic field and the neutrino magnetic moments. Taking, as a starting point, a simple analytical expression for the electron antineutrino appearence probability derived in the three neutrino picture, we check its validity by comparing it with full numerical calculations and apply it to revisit the existing limits on the product of the neutrino transition magnetic moment $\mu_{12}$ and the magnetic field at the neutrino production point inside the Sun. The outlined procedure can also be applied to future solar antineutrino searches.

### Primary author

Pablo Martínez-Miravé (IFIC (CSIC/Universitat de València))

### Presentation Materials

 20220513163938_12.mp4 20220530212925_18.jpg