Charged Higgs effects in IceCube: PeV events and NSIs

TL;DR

This paper investigates how charged Higgs particles in a neutrinophilic two-Higgs doublet model could explain IceCube's PeV neutrino excess and induce detectable non-standard neutrino interactions, constrained by multiple experiments.

Contribution

It provides a combined analysis of IceCube PeV data and various neutrino experiments within a charged Higgs model, highlighting potential signatures of non-standard interactions.

Findings

Charged Higgs can account for IceCube PeV excess.

Model predicts sizeable neutrino non-standard interactions.

Parameter space constrained by multiple neutrino and collider experiments.

Abstract

Extensions of the Standard Model with charged Higgs, having a non-negligible coupling with neutrinos, can have interesting implications vis-\`{a}-vis neutrino experiments. Such models can leave their footprints in the ultra-high energy neutrino detectors like IceCube in the form of neutrino non-standard interactions (NSIs) which can also be probed in lower energy neutrino experiments. We consider a model based on the neutrinophilic two-Higgs doublets and study its imprints in the recently reported excess neutrino events in the PeV energy bins at the IceCube. An additional signature of the model is that it also leads to sizeable NSIs. We perform a combined study of the latest IceCube data along with various other constraints arising from neutrino experiments e.g., Borexino, TEXONO, COHERENT, DUNE, and T2HK, together with the limits set by the LEP experiment, and explore the parameter space which can lead to a sizeable NSI.