Neutrino electromagnetic properties after the first pp solar neutrino observation at XENONnT
Abstract
The XENONnT Collaboration has recently reported the first measurement of low-energy solar neutrinos through elastic neutrino-electron scattering in a dark matter detector, opening a new window on Standard Model predictions and on neutrino electromagnetic properties. We analyze these data to extract the pp neutrino flux normalization and the weak mixing angle at low momentum transfer (∼ 0.1 MeV). We also derive bounds on the neutrino charge radii, magnetic moments, and millicharges, as well as on the sterile-neutrino dipole portal. Since the pp-flux determination displays a mild excess, we further investigate the role of the 14C background in the fit and assess how it affects the extracted parameters. Our results show that dark matter detectors now offer a probe of neutrino physics that is complementary to dedicated precision experiments.
Related
- Probing the Solar B 8 Neutrino Fog with XENONnT
- Observation of the electromagnetic Dalitz transition J/ψ→ e+ e- ηc
- Electromagnetic Shower Reconstruction and Identification in FASER's Emulsion Detector for LHC Forward Neutrino Measurements
- First observation of the electromagnetic Dalitz decay ψ(3686) → μ+ μ- η′
- Intrinsic electromagnetic properties
BibTeX
@misc{romeri2026neutrino,
title = {{Neutrino electromagnetic properties after the first $pp$ solar neutrino observation at XENONnT}},
author = {Valentina De Romeri and Dimitrios K. Papoulias and Federica Pompa and Christoph A. Ternes},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.38734},
eprint = {2610.38734},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.38734},
}
RIS
TY - UNPB
TI - Neutrino electromagnetic properties after the first pp solar neutrino observation at XENONnT
AU - Valentina De Romeri
AU - Dimitrios K. Papoulias
AU - Federica Pompa
AU - Christoph A. Ternes
PY - 2026
DA - 2026/10/28
PB - arXiv
DO - 10.48550/arxiv.2610.38734
UR - https://arxiv.org/abs/2610.38734
AB - The XENONnT Collaboration has recently reported the first measurement of low-energy solar neutrinos through elastic neutrino-electron scattering in a dark matter detector, opening a new window on Standard Model predictions and on neutrino electromagnetic properties. We analyze these data to extract the pp neutrino flux normalization and the weak mixing angle at low momentum transfer (∼ 0.1 MeV). We also derive bounds on the neutrino charge radii, magnetic moments, and millicharges, as well as on the sterile-neutrino dipole portal. Since the pp-flux determination displays a mild excess, we further investigate the role of the ^14C background in the fit and assess how it affects the extracted parameters. Our results show that dark matter detectors now offer a probe of neutrino physics that is complementary to dedicated precision experiments.
ER -