Speaker
Description
The study of neutrino interactions at low energies has transitioned from a discovery phase to a precision era, offering a unique probe into physics beyond the Standard Model. With the observation of Coherent Elastic Neutrino-Nucleus Scattering (CE$\nu$NS) [2,4] and the increasing sensitivity of Dark Matter direct detection experiments to solar neutrinos, we now have access to a wealth of data that demands a consistent theoretical and phenomenological framework.
In this work, I will review the current status of low-energy neutrino physics, discussing the challenges and opportunities in testing the Standard Model (SM) with unprecedented precision. I will specifically focus on recent developments in global analyses that combine data from CE$\nu$NS, neutrino-electron scattering ($\nu$ES), and solar neutrinos observed in xenon-based detectors.
Central to this presentation is our recent work published in Phys. Rev. Lett. 135, 231803 (2025) [1], where we performed the first comprehensive global fit of these datasets. By accounting for flavor-dependent effects and radiative corrections [3], we derive the most stringent model-independent constraints on the neutrino charge radius and weak couplings. Notably, our analysis reveals a tension in the landscape of allowed solutions: while one solution aligns with SM prediction, a degenerate solution, slightly favored by current data, hints at potential non-standard interactions or flavor-dependent effects that could challenge our understanding of electroweak interactions in the neutrino sector.
I will discuss the implications of these findings for the future of precision SM tests. The results highlight the necessity of a unified approach to low-energy neutrino data to disentangle genuine beyond the SM signals from complex standard physics effects.
Main references:
[1] M. Atzori Corona, M. Cadeddu, N. Cargioli, F. Dordei, C. Giunti, C. A. Ternes, The Standard Model Tested with Neutrinos, Phys. Rev. Lett. 135, 231803 (2025)[arXiv:2504.05272] - https://doi.org/10.1103/dplq-dvc8
[2] M. Atzori Corona, M. Cadeddu, N. Cargioli, F. Dordei, C. Giunti, Reactor antineutrinos CE$\nu$NS on germanium: CONUS+ and TEXONO as a new gateway to SM and BSM physics, Phys. Rev. D 112, 015007 (2025) [arXiv:2501.18550] - https://doi.org/10.1103/n563-8v8d
[3] M. Atzori Corona, M. Cadeddu, N. Cargioli, F. Dordei, C. Giunti, Momentum dependent flavor radiative corrections to the coherent elastic neutrino-nucleus scattering for the neutrino charge-radius determination, JHEP 05 (2024) 271 [arXiv:2402.16709] - https://doi.org/10.1007/JHEP05%282024%29271
[4] M. Atzori Corona, M. Cadeddu, N. Cargioli, G. Co', F. Dordei, C. Giunti, Joint analysis of reactor and accelerator CE$\nu$NS data on germanium: implications for the Standard Model and nuclear physics, Phys.Lett.B 869 (2025) 139856 [arXiv:2506.13555] - https://doi.org/10.1016/j.physletb.2025.139856