Large, Extra Dimensions at the Deep Underground Neutrino Experiment
Jeffrey M. Berryman, Andr\'e de Gouv\^ea, Kevin J. Kelly, O.L.G., Peres, and Zahra Tabrizi

TL;DR
This paper explores how the Deep Underground Neutrino Experiment (DUNE) can test large-extra-dimension models that explain neutrino masses, showing that DUNE can effectively distinguish these models from standard and other neutrino frameworks.
Contribution
It demonstrates DUNE's potential to probe large-extra-dimension models and clarifies their observable effects on neutrino oscillations, including their similarity to multi-neutrino scenarios.
Findings
DUNE can effectively test LED models through neutrino oscillation measurements.
LED models are nearly indistinguishable from a (3+3N) neutrino framework for small N.
No additional CP-violation sources are introduced by LED models beyond the standard phase.
Abstract
We investigate the potential of the long-baseline Deep Underground Neutrino Experiment (DUNE) to study large-extra-dimension (LED) models originally proposed to explain the smallness of neutrino masses by postulating that right-handed neutrinos, unlike all standard model fermion fields, can propagate in the bulk. The massive Kaluza-Klein (KK) modes of the right-handed neutrino fields modify the neutrino oscillation probabilities and can hence affect their propagation. We show that, as far as DUNE is concerned, the LED model is indistinguishable from a -neutrino framework for modest values of ; = 1 is usually a very good approximation. Nonetheless, there are no new sources of -invariance violation other than one -odd phase that can be easily mapped onto the -odd phase in the standard three-neutrino paradigm. We analyze the sensitivity of DUNE to the LED…
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