A Confinement Potential for Leptons and Their Tunneling Effects into Extra Dimensions
Abstract
Considering the five-dimensional warped spacetime AdS5 with the D3-brane, we derive a potential in the fifth dimension, according to which ordinary particles are initially confined on the D3-brane. It is estimated, however, that the lightest neutrino with mass m1 is tunneling away into the extra dimension. Hence there is a possibility that no neutrinos with mass m1 exist in cosmicbackground neutrinos, but surviving neutrinos are those with heavier masses m2 and m3. The other possibilities are also discussed.
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