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arXiv · 2501.12171

Flavor-Dependent Long-Range Neutrino Interactions in DUNE and T2HK: Synergy Breeds Power

Masoom Singh·Mauricio Bustamante·Sanjib Kumar Agarwalla
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Abstract

Discovering new neutrino interactions would provide evidence of physics beyond the Standard Model. We focus on flavor-dependent long-range neutrino interactions mediated by ultra-light mediators (masses below $10^{-10}$ eV) from lepton-number gauge symmetries $L_e-L_\mu$, $L_e-L_\tau$, and $L_\mu-L_\tau$. These interactions, sourced by electrons and neutrons in the Earth, Moon, Sun, Milky Way, and the local Universe, could modify neutrino oscillation probabilities. The upcoming long-baseline experiments, DUNE and T2HK, with their large statistics, reduced systematic uncertainties, and well-characterized neutrino beams, will probe these interactions. We forecast that, while individually DUNE and T2HK could constrain these long-range neutrino interactions, their combination lifts parameter degeneracies that weaken individual sensitivity and provides stronger constraints.

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Masoom Singh, Mauricio Bustamante, Sanjib Kumar Agarwalla. 2025-01-21. Flavor-Dependent Long-Range Neutrino Interactions in DUNE and T2HK: Synergy Breeds Power. https://arxiv.org/abs/2501.12171

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