Regular Article - Theoretical Physics
Probing light mediators in the radiative emission of neutrino pair
Tsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China
2 Key Laboratory for Particle Astrophysics and Cosmology (MOE) and Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, 200240, Shanghai, China
Accepted: 11 February 2022
Published online: 9 March 2022
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 eV) scale, this process is extremely sensitive for the mediator mass range ) eV. The sensitivity on the product of couplings with electron ( or ) and neutrinos ( or ) can touch down to for a scalar mediator and for a vector one, with orders of improvement from the existing constraints.
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