Bonn 2010 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 22: Neutrinophysik (Theorie) II
T 22.7: Vortrag
Dienstag, 16. März 2010, 18:15–18:30, HG XV
Baseline-dependent neutrino oscillations with extra-dimensional shortcuts — •Sebastian Hollenberg1, Octavian Micu1, Heinrich Päs1, and Thomas J. Weiler2 — 1Fakultät für Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany — 2Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
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 cancelation occurs between two phase differences, the usual kinematic one coming from the neutrino mass-squared difference, and a new 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. An asymmetrically-warped 4+1 dimensional metric is introduced for the brane-bulk system. In this case it is found that the resonance condition involves both the neutrino energy E and the travel distance L on the brane; to a good approximation the resonance condition is 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.