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Title: Sterile-active neutrino oscillations and shortcuts in the extra dimension

Abstract

We discuss a possible new resonance in active-sterile neutrino oscillations arising in theories with large extra dimensions. Fluctuations in the brane effectively increase the path-length of active neutrinos relative to the path-length of sterile neutrinos through the extra-dimensional bulk. Well below the resonance, the standard oscillation formulas apply. Well above the resonance, active-sterile oscillations are suppressed. We show that a resonance energy in the range of 30-400 MeV allows an explanation of all neutrino oscillation data, including LSND data, in a consistent four-neutrino model. A high resonance energy implies an enhanced signal in MiniBooNE. A low resonance energy implies a distorted energy spectrum in LSND, and an enhanced {nu}{sub {mu}} depletion from a stopped-pion source. The numerical value of the resonance energy may be related back to the geometric aspects of the brane world. Some astrophysical and cosmological consequences of the brane-bulk resonance are briefly sketched.

Authors:
;  [1];  [2]
+ Show Author Affiliations
  1. Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Road, Honolulu, Hawaii 96822 (United States)
  2. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)
Publication Date:
OSTI Identifier:
20713875
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 72; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.72.095017; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGY; ENERGY SPECTRA; FLUCTUATIONS; GEOMETRY; MEV RANGE; MUON NEUTRINOS; NEUTRINO OSCILLATION; PIONS; RESONANCE PARTICLES

Citation Formats

Paes, Heinrich, Pakvasa, Sandip, and Weiler, Thomas J. Sterile-active neutrino oscillations and shortcuts in the extra dimension. United States: N. p., 2005. Web. doi:10.1103/PhysRevD.72.095017.
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Paes, Heinrich, Pakvasa, Sandip, & Weiler, Thomas J. Sterile-active neutrino oscillations and shortcuts in the extra dimension. United States. doi:10.1103/PhysRevD.72.095017.
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Paes, Heinrich, Pakvasa, Sandip, and Weiler, Thomas J. Tue . "Sterile-active neutrino oscillations and shortcuts in the extra dimension". United States. doi:10.1103/PhysRevD.72.095017.
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@article{osti_20713875,
title = {Sterile-active neutrino oscillations and shortcuts in the extra dimension},
author = {Paes, Heinrich and Pakvasa, Sandip and Weiler, Thomas J.},
abstractNote = {We discuss a possible new resonance in active-sterile neutrino oscillations arising in theories with large extra dimensions. Fluctuations in the brane effectively increase the path-length of active neutrinos relative to the path-length of sterile neutrinos through the extra-dimensional bulk. Well below the resonance, the standard oscillation formulas apply. Well above the resonance, active-sterile oscillations are suppressed. We show that a resonance energy in the range of 30-400 MeV allows an explanation of all neutrino oscillation data, including LSND data, in a consistent four-neutrino model. A high resonance energy implies an enhanced signal in MiniBooNE. A low resonance energy implies a distorted energy spectrum in LSND, and an enhanced {nu}{sub {mu}} depletion from a stopped-pion source. The numerical value of the resonance energy may be related back to the geometric aspects of the brane world. Some astrophysical and cosmological consequences of the brane-bulk resonance are briefly sketched.},
doi = {10.1103/PhysRevD.72.095017},
journal = {Physical Review. D, Particles Fields},
number = 9,
volume = 72,
place = {United States},
year = {Tue Nov 01 00:00:00 EST 2005},
month = {Tue Nov 01 00:00:00 EST 2005}
}
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Journal Article:
DOI:  10.1103/PhysRevD.72.095017
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    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.more » 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.« less

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