2004/02/06 by G. Bhattacharyya, Bhattacharyya, G., H. V. Klapdor-Kleingrothaus +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0402071
12 pages, 2 figures, talk presented by H. Paes at AHEP-2003, Valencia, Spain
arxiv created 2004/02/06 · arxiv updated 2009/12/01
We study the model-building conditions under which an observable 0vBB decay signal is predicted due to Kaluza-Klein singlet neutrinos in theories with large extra dimensions. Our analysis is based on 5-dimensional singlet-neutrino models compactified on an S1/Z2 orbifold, where the Standard-Model fields are localized on a 3-brane. We show that sizeable 0vBB rates within the above minimal 5-dimensional framework would require a non-vanishing shift of the 3-brane from the orbifold fixed points by an amount smaller than the typical scale 100 inverse MeV characterizing the Fermi nuclear momentum. The resulting 5-dimensional models predict a sizeable effective Majorana-neutrino mass that could be several orders of magnitude larger than the light neutrino masses.