Abstract
We consider the production of a new MeV-scale fermion in coherent elastic neutrino-nucleus scattering. The effect on the measurable nucleon recoil spectrum is calculated. Assuming that the new fermion couples to neutrinos and quarks via a singlet scalar, we set limits on its mass and coupling using COHERENT data and also determine the sensitivity of the CONUS experiment. We investigate the possible connection of the new fermion to neutrino mass generation. The possibility of the new fermion being the dark matter particle is also studied.
Highlights
JHEP12(2018)024 at high energy, in MeV-scale particles as this is the typical energy scale of CEνN S, where naturally the most interesting phenomenology arises
We investigate the possible connection of the new fermion to neutrino mass generation
Any new particle beyond the Standard Model is an attractive candidate for dark matter (DM), we investigate in such a setup whether χ can be such a popular MeV-scale DM candidate
Summary
We investigate the phenomenological aspects of νN → χN coherent scattering by assuming only the following interaction. Where yχ and yN parametrize the strength of the Yukawa interaction of a mediator particle S with ν-χ and the nucleus, respectively. 2.1 Prerequisites for obtaining the cross sections Due to the mass of χ, the process νN → χN has different kinematics than CEνN S. − pμ and pμ denote the initial 4-momenta of the neutrino and the nucleus, respectively; − k1μ and k2μ denote the final 4-momenta of χ and the nucleus, respectively; − qμ ≡ k2μ − pμ2 = pμ1 − k1μ denotes the momentum transfer in the scattering process;. − M , mχ, and mS denote the masses of the nucleus, χ, and the mediator S, respectively;.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
