# IV international conference on particle physics and astrophysics

22-26 October 2018
Hotel Intourist Kolomenskoye 4*
Europe/Moscow timezone

## New constraints on magnetic moments of solar neutrinos in Borexino

23 Oct 2018, 09:15
15m
Moskvorechye 1 hall (Hotel Intourist Kolomenskoye 4*)

### Moskvorechye 1 hall

#### Hotel Intourist Kolomenskoye 4*

Kashirskoye shosse, 39B, Moscow, Russia, 115409
Plenary/section talk Particle physics: neutrino physics

### Speaker

Alina Vishneva (DLNP JINR)

### Description

Effective magnetic moment of solar neutrinos is constrained using a 1291.5 days dataset of Borexino Phase-II. The sought-for effect from electromagnetic neutrino interaction is the contribution to the low-energy part of the $\nu-e$ scattering cross section affecting the shapes of the electron recoil spectra. Spectral fit of the solar neutrino data leads to the limit of $\mu^{eff}_\nu<2.8\cdot10^{-11}\mu_{B}$ ($90\%$ C. L.). Finally, this result has been used to constrain the elements of the magnetic moments matrix in the mass and flavor bases.

### Primary author

Alina Vishneva (DLNP JINR)

### Presentation Materials

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