Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-11-24
Phys.Rev. D65 (2002) 024032
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, latex
Scientific paper
10.1103/PhysRevD.65.024032
Recently it was proposed that the standard model (SM) degrees of freedom reside on a $(3+1)$-dimensional wall or ``3-brane'' embedded in a higher-dimensional spacetime. Furthermore, in this picture it is possible for the fundamental Planck mass $\mst$ to be as small as the weak scale $\mst\simeq O(\tev)$ and the observed weakness of gravity at long distances is due the existence of new sub-millimeter spatial dimensions. We show that in this picture it is natural to expect neutrino masses to occur in the $10^{-1} - 10^{-4}\ev$ range, despite the lack of any fundamental scale higher than $\mst$. Such suppressed neutrino masses are not the result of a see-saw, but have intrinsically higher-dimensional explanations. We explore two possibilities. The first mechanism identifies any massless bulk fermions as right-handed neutrinos. These give naturally small Dirac masses for the same reason that gravity is weak at long distances in this framework. The second mechanism takes advantage of the large {\it infrared} desert: the space in the extra dimensions. Here, small Majorana neutrino masses are generated by breaking lepton number on distant branes.
Arkani-Hamed Nima
Dimopoulos Savas
Dvali Gia
March-Russell John
No associations
LandOfFree
Neutrino Masses from Large Extra Dimensions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Neutrino Masses from Large Extra Dimensions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutrino Masses from Large Extra Dimensions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-347231