Power law enhancement of neutrino mixing angles in extra dimensions
Gautam Bhattacharyya, Srubabati Goswami, Amitava Raychaudhuri
Abstract
We study the renormalization of the llHH-type Majorana neutrino mass operator in a scenario where there is a compactified extra dimension and the fields involved correspond to only the standard model particles and their Kaluza-Klein excitations. We observe that in a two flavour scenario, where one of the neutrinos is necessarily ντ, it is indeed possible to generate a large mixing at 100 GeV starting from a very small mixing near the ultra-violet cutoff 30 TeV. En passant, we also derive the Higgs mass upper and lower limits from perturbative unitarity and stability of the potential, respectively.
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