Abstract
The process of neutral-current coherent elastic neutrino-nucleus scattering, consistent with the Standard Model (SM) expectation, has been recently measured by the COHERENT experiment at the Spallation Neutron Source. On the basis of the observed signal and our nuclear calculations for the relevant Cs and I isotopes, the extracted constraints on both conventional and exotic neutrino physics are updated. The present study concentrates on various SM extensions involving vector and tensor nonstandard interactions as well as neutrino electromagnetic properties, with an emphasis on the neutrino magnetic moment and the neutrino charge radius. Furthermore, models addressing a light sterile neutrino state and scenarios with new propagator fields---such as vector $Z^\prime$ and scalar bosons---are examined, and the corresponding regions excluded by the COHERENT experiment are presented.
Highlights
The observation of coherent elastic neutrino-nucleus scattering (CEνNS) was reported for the first time by the COHERENT experiment at the Spallation Neutron Source (SNS) [1], more than four decades after its initial prediction [2,3,4]
A good agreement with the Standard Model (SM) expectation was obtained for neutral currents within a period of 308.1 live days, during which the COHERENT experiment detected neutrinos generated from pion decay, scattered off a low-threshold sodium doped CsI[Na] scintillator [5], at the 6.7σ confidence level
Special attention has been paid to various contributions to neutrino-nucleus scattering arising within the context of potential nonstandard interactions (NSIs), EM neutrino interactions, sterile neutrino mixing models, and the presence of new mediators
Summary
The observation of coherent elastic neutrino-nucleus scattering (CEνNS) was reported for the first time by the COHERENT experiment at the Spallation Neutron Source (SNS) [1], more than four decades after its initial prediction [2,3,4]. A good agreement with the Standard Model (SM) expectation was obtained for neutral currents within a period of 308.1 live days, during which the COHERENT experiment detected neutrinos generated from pion decay, scattered off a low-threshold sodium doped CsI[Na] scintillator [5], at the 6.7σ confidence level. Such a breakthrough discovery—apart from completing the SM picture of neutrino interactions with nucleons and nuclei—stands out as a prime motivation to search for new phenomena beyond the SM [6,7], opening a window towards unraveling some of the most fundamental questions in astroparticle and nuclear physics [8].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
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
