Baseline-dependent neutrino oscillations with extra-dimensional shortcuts

Journal Article · Sun Nov 01 04:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.093005· OSTI ID:21325457

Hollenberg, Sebastian; Micu, Octavian; Paes, Heinrich ^[1]; Weiler, Thomas J ^[2]

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1. Fakultaet fuer Physik, Technische Universitaet Dortmund, D-44221 Dortmund (Germany)
2. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)

In extra-dimensional scenarios oscillations between active and sterile neutrinos can be governed by a new resonance in the oscillation amplitude. This resonance results when cancellation occurs between two phase differences, the usual kinematic one coming from the neutrino mass-squared difference, and a geometric one coming from the difference in travel times of the sterile neutrino through the bulk relative to the active neutrino confined to the brane. In this work we introduce a specific metric for the brane-bulk system, from which we explicitly derive extra-dimensional geodesics for the sterile neutrino, and ultimately the oscillation probability of the active-sterile two-state system. We find that for an asymmetrically warped metric, the resonance condition involves both the neutrino energy E and the travel distance L on the brane. In other words, the resonant energy may be viewed as baseline dependent. We show that to a good approximation, the resonance condition is not on E or on L, but rather on the product LE. The model is rich in implications, including the possibility of multiple solutions to the resonance condition, with ramifications for existing data sets, e.g., LSND and MiniBooNE. Some phenomenology with these brane-bulk resonances is discussed.

• OSTI ID: 21325457
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
APPROXIMATIONS
GEODESICS
MASS
MATHEMATICAL SOLUTIONS
METRICS
NEUTRINO OSCILLATION
NEUTRINOS
OSCILLATIONS
PROBABILITY
RESONANCE