Large extra dimensions at the Deep Underground Neutrino Experiment

Author(s)

Berryman, Jeffrey M. ; de Gouvea, Andre ; Kelly, Kevin J. ; Peres, O. L. G. ; Tabrizi, Zahra

• Document type: Journal article
• Source: PHYSICAL REVIEW D; v. 94, n. 3, p. 12-pg., 2016-08-24.

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 (3 + 3N)-neutrino framework for modest values of N; N = 1 is usually a very good approximation. Nonetheless, there are no new sources of CP-invariance violation other than one CP-odd phase that can be easily mapped onto the CP-odd phase in the standard three-neutrino paradigm. We analyze the sensitivity of DUNE to the LED framework and explore the capability of DUNE to differentiate the LED model from the three-neutrino scenario and from a generic (3 + 1)-neutrino model. (AU)

• FAPESP's process: 14/19164-6 - Challenges in the 21st century in neutrino physics and astrophysics
• Grantee: Orlando Luis Goulart Peres
• Support Opportunities: Special Projects