Majorana Neutrino, the Size of Extra Dimensions, and Neutrinoless Double Beta Decay
Marek Gozdz, Wieslaw A. Kaminski
Abstract
The problem of Majorana neutrino mass generated in Arkani-Hamed--Dimopoulos-Dvali model with n extra spatial dimensions is discussed. Taking into account constraints on neutrino masses coming from cosmological observations, it is possible to obtain lower limits on the size of extra dimensions as large as 10-6 mm. In the case of n=4 it is easy to lower the fundamental scale of gravity from the Planck energy to electroweak scale TeV without imposing any additional constraints. A link between the half-life of neutrinoless double beta decay and the size of extra dimensions is discussed.
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