The effects of triplet Higgs bosons in long baseline neutrino experiments

Abstract

The triplet scalars $(\Delta ={\Delta }^{++},{\Delta }^{+},{\Delta }^0)$, utilized in the so-called Type-II seesaw model to explain the lightness of neutrinos, would generate nonstandard interactions (NSI) for neutrino propagating in matter. We investigate the prospects to probe these interactions in long baseline neutrino oscillation experiments. We analyze the upper bounds that the proposed DUNE experiment might set on the nonstandard parameters and numerically derive upper bounds, as function of the lightest neutrino mass, on the ratio the mass $M_{\Delta }$ of the triplet scalars and strength $|{\lambda }_{\varphi }|$ of the coupling $\varphi \varphi \Delta$ of the triplet $\Delta$ and conventional Higgs doublet $\varphi$ . We also discuss the possible misinterpretation of these effects as effects arising from a nonunitarity of the neutrino mixing matrix and compare the results with the bounds that arise from the charged lepton flavor violating processes.

arXiv comment19 pages, 5 figures

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Cited by in corpus (2)

• Type-II Seesaw Scalar Triplet Model at a 100 TeV $pp$ Collider: Discovery and Higgs Portal Coupling Determination
• Exploring SMEFT Induced Non-Standard Interactions from COHERENT to Neutrino Oscillations