Speaker
Description
Coherent Elastic Neutrino-Nucleus Scattering (CE$\nu$NS) is a tree-level neutral-current process described within the Standard Model (SM). CE$\nu$NS serves as a crucial channel for testing the SM of electroweak theory and exploring potential new physics at low energies. Since its first detection[1], significant efforts, including the TEXONO experiment, have focused on detecting and improving our understanding of this process. The TEXONO Collaboration conducts an intensive research program on low-energy neutrino physics at the Kuo-Sheng Nuclear Power Plant in Taiwan, detecting low-energy electron antineutrinos with high-purity germanium (Ge) detectors[2].
We present the first comprehensive NSI analysis of TEXONO CE$\nu$NS data, using both nPC-Ge(2016) and the recently upgraded pPC-Ge(2025)[3] detectors, which have threshold energies of 300 eV and 200 eV, respectively. Our study explores all possible NSI types – vector (V), axial-vector (A), scalar (S), pseudoscalar (P), and tensor (T) – through both a simplified model with light mediators and model-independent approaches. We demonstrate that TEXONO pPC-Ge data significantly improve the sensitivity over the earlier nPC-Ge data, and offer competitive constraints compared to other reactor neutrino experiments[4]. Our results highlight the critical role of CE$\nu$NS experiments in advancing neutrino physics and probing interactions beyond the SM.
References
[1] D. Akimov et al. [COHERENT Collaboration], "Observation of Coherent Elastic Neutrino-Nucleus Scattering," Science 357, 6356, 1123 (2017).
[2] H. T. Wong et al., "Research program towards observation of neutrino-nucleus coherent scattering," J. Phys. Conf. Ser. 39, 266 (2006).
[3] S. Karmakar et al. [TEXONO Collaboration], "New Limits on Coherent Neutrino Nucleus Elastic Scattering Cross Section at the Kuo-Sheng Reactor Neutrino Laboratory.", Physical Review Letters, 134(12), 121802.
[4] S. Karadag et al. [TEXONO Collaboration], "Constraints on New Physics with Light Mediators and Generalized Neutrino Interactions via Coherent Elastic Neutrino Nucleus Scattering.", arXiv preprint, arXiv:2502.20007.
| Collaboration you are representing | TEXONO |
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