Searching for neutrino polarizability at DUNE
Sam Carey, Pedro Machado, Gil Paz, Alexey A. Petrov, Alexandre Sousa, Michele Tammaro, Jure Zupan
TL;DR
This paper investigates DUNE's potential to detect neutrino polarizability effects caused by light scalar mediators, focusing on unique electromagnetic signatures from neutrino-electron and neutrino-nucleus interactions.
Contribution
It introduces a novel analysis of DUNE's sensitivity to neutrino polarizability via electromagnetic signatures, comparing projected detection capabilities with existing bounds.
Findings
DUNE can potentially detect neutrino polarizability signals.
Electromagnetic shower signatures are key indicators.
Projected sensitivities surpass some current bounds.
Abstract
We perform an initial study of DUNE's sensitivity to enhanced neutrino polarizability within models of light scalar mediators. We identify two possible signatures of polarizability due to neutrino scattering on electrons and due to coherent scattering on argon nuclei. These result in either one or two separated electromagnetic showers, respectively, with no associated hadronic activity. For each signature we compute the signal rates and the relevant backgrounds, obtaining the projected reach of the DUNE near detector. We then compare this with the current astrophysical and terrestrial bounds on light scalar models coupling to neutrinos and/or photons.
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