Higher dimensional models of light Majorana neutrinos confronted by data
arXiv:hep-ph/0404174 · doi:10.1103/PhysRevD.70.051903
Abstract
We discuss experimental and observational constraints on certain models of higher dimensional light Majorana neutrinos. Models with flavor blind brane-bulk couplings plus three or four flavor diagonal light Majorana neutrinos on the brane, with subsequent mixing induced solely by the Kaluza-Klein tower of states, are found to be excluded by data on the oscillations of solar, atmospheric and reactor neutrinos, taken together with the WMAP upper bound on the sum of neutrino masses. Extra dimensions, if relevant to neutrino mixing, need to discriminate between neutrino flavors.
5 pages, Revtex4, 2 PS figures. Fig. 2a and 2b from earlier version are now combined into one figure. Minor modifications in the text. References added
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