# NuFact 2022: The 23rd International Workshop on Neutrinos from Accelerators

July 30, 2022 to August 6, 2022
Cliff Lodge
US/Mountain timezone

## Probing Light Mediators in the Radiative Emission of Neutrino Pair

Aug 4, 2022, 12:20 PM
30m
Magpie B

### Magpie B

Talk WG5: Beyond PMNS

### Speaker

Pedro Simoni Pasquini (Unicamp)

### Description

We propose a new possibility of using the coherently enhanced neutrino pair emission to probe light-mediator interactions between electron and neutrinos. With typical momentum transfer at the atomic $\mathcal O(1$\,eV) scale, this process is extremely sensitive for the mediator mass range $\mathcal O(10^{-3} \sim 10^4$)\,eV. The sensitivity on the product of couplings with electron ($g^e$ or $y^e$) and neutrinos ($g^\nu$ or $y^\nu$) can touch down to $|y^e y^\nu| < 10^{-9} \sim 10^{-19}$ for a scalar mediator and $|g^e g^\nu| < 10^{-15} \sim 10^{-26}$ for a vector one, with orders of improvement from the existing constraints.

Attendance type In-person presentation

### Primary authors

Pedro Simoni Pasquini (Unicamp) Shao-Feng Ge (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)