The European Spallation Source (ESS), under development in Sweden, is set to provide a high-intensity pulsed neutrino beam, offering unprecedented opportunities for high-statistics studies of Coherent Elastic Neutrino-Nucleus Scattering (CENS) using state-of-the-art detection technologies. The anticipated statistical reach and precision at ESS will enable us to probe both Standard Model (SM) parameters and potential beyond-the-Standard Model (BSM) physics with enhanced sensitivity compared to current experiments. In this talk, I will present the projected sensitivities for low-energy SM precision measurements at ESS, including determinations of the weak mixing angle and neutron root mean square charge radius, exploiting the collaboration's array of detector technologies and experimental setups |1|. Additionally, we explore the implications of these measurements for constraining BSM physics, such as Non-Standard Interactions (NSI) and broader frameworks like Neutrino Generalized Interactions (NGI), emphasizing prospects for light mediator detection. Further, we investigate potential signals of lepton unitarity violation and production of light sterile neutrinos, specifically examining: (a) short-baseline active-sterile neutrino oscillations, (b) sterile neutrino production via transition magnetic moments, and (c) production of sterile neutrinos via the upscattering of active neutrinos on nuclei, involving various Lorentz-invariant, non-derivative couplings (scalar, pseudoscalar, vector, axial-vector, and tensor).
Reference:
|1| D. Baxter et al., "Coherent Elastic Neutrino-Nucleus Scattering at the European Spallation Source," JHEP 02 (2020) 123, arXiv:1911.00762 [physics.ins-det].
