Sensitivity of low energy neutrino experiments to physics beyond the standard model

Abstract

We study the sensitivity of future low energy neutrino experiments to extra neutral gauge bosons, leptoquarks and R-parity breaking interactions. We focus on future proposals to measure coherent neutrino-nuclei scattering and neutrino-electron elastic scattering. We introduce a new comparative analysis between these experiments and show that in different types of new physics it is possible to obtain competitive bounds to those of present and future collider experiments. For the cases of leptoquarks and R-parity breaking interactions we found that the expected sensitivity for most of the future low energy experimental setups is better than the current constraints.

Sensitivity toZ-prime and nonstandard neutrino interactions from ultralow threshold neutrino-nucleus coherent scattering

“…In addition to detectors developed for dark matter searches, several other source and detector configurations have been considered to study CEνNS [9][10][11]. These include neutrinos from nuclear reactors, intense radioactive sources, or from accelerators.…”

Probing nonstandard interactions with reactor neutrinos

“…As concrete proposed experiments, we have discussed [2]: TEXONO [17], the stopped pion source with a noble gas detector [18] and the beta beams [19]. We would like to note that currently there are other experimental proposals [20], which are not covered by our analysis.…”

“…We have demonstrated that neutrino coherent scattering off nuclei has a lot of potential to make precision tests of new physics, in particular, to probe NSI [1,2] that naturally appear in many extensions of the Standard Model. A new experiment would be able to test large NSI parameters and therefore may exclude new solutions to the solar neutrino data [12].…”

“…It was shown recently that coherent neutrino nuclei scattering is a very sensitive probe to NSI [1,2]. The sensitivity to some specific NSI models, such as extra heavy neutral gauge bosons, leptoquarks, supersymmetry with broken R-parity, could be better than present constraints and, * Speaker: T.I.…”

“…Here we focus on the NSI effects in neutrino detection at low energies [1][2][3][4][5]. We will present the limits on the weak mixing angle, sin 2 θ W , and on the electron neutrino effective charge radius, r 2 νe , obtained from the combined analysis of all available low energy (anti)neutrino-electron elastic scattering experiments including recent ν-e cross section measurement by TEXONO [6].…”