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arXiv · 2110.03510

Probing Light Mediators in the Radiative Emission of Neutrino Pair

Shao-Feng Ge·Pedro Pasquini
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Abstract

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.

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Shao-Feng Ge, Pedro Pasquini. 2021-10-07. Probing Light Mediators in the Radiative Emission of Neutrino Pair. https://doi.org/10.1140/epjc%2Fs10052-022-10131-4

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