Neutrino masses and mixing angles from leptoquark interactions

Details Neutrino masses and mixing angles from leptoquark interactions Neutrino masses and mixing angles from leptoquark interactions

1999-09-27

arxiv.org/abs/hep-ph/9909518v2

Phys.Rev. D62 (2000) 073009

Physics

High Energy Physics

High Energy Physics - Phenomenology

The expressions for majorana mass matrix of neutrinos have been corrected so that they are symmetric. Final version to be publ

Scientific paper

10.1103/PhysRevD.62.073009

In this paper we show that the mixing between leptoquarks (LQ's) from different $SU(2)_l$ multiplets can generate a non-trivial Majorana mass matrix for neutrinos through one loop self energy diagrams. Such mixing can arise from gauge invariant and renormalizable LQ-Higgs interaction terms after EW symmetry breaking. We use the experimental indication on neutrino oscillation to find constraints on specific combinations of LQ couplings to quark-lepton pairs and to the SM higgs boson. These constraints are compared with the ones from $\pi\to e\bar {\nu}_e$.

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