Non-Standard Neutrino Interactions from a Triplet Seesaw Model

TL;DR

This paper explores how a triplet seesaw model can produce significant non-standard neutrino interactions, linking them to neutrino masses and mixing, with implications for lepton flavor violation, Earth matter effects, and collider signals.

Contribution

It demonstrates the potential for sizable NSIs in a triplet seesaw model with nearly degenerate neutrino masses, connecting theoretical predictions to observable phenomena.

Findings

Sizable NSIs can arise from nearly degenerate neutrino masses.

Observable lepton flavor violating decays are predicted.

Distinct patterns of doubly charged Higgs decays are identified.

Abstract

We investigate non-standard neutrino interactions (NSIs) in the triplet seesaw model featuring non-trivial correlations between NSI parameters and neutrino masses and mixing parameters. We show that sizable NSIs can be generated as a consequence of a nearly degenerate neutrino mass spectrum. Thus, these NSIs could lead to quite significant signals of lepton flavor violating decays such as \mu^- \to e^- \nu_e anti\nu_\mu and \mu^+ \to e^+ anti\nu_e \nu_\mu at a future neutrino factory, effects adding to the uncertainty in determination of the Earth matter density profile, as well as characteristic patterns of the doubly charged Higgs decays observable at the Large Hadron Collider.