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Abstract
Extensions of the Standard Model with charged Higgs, having a non-negligible coupling with neutrinos, can have interesting implications vis-à-vis neutrino experiments. Such models can leave their footprints not only in the ultra-high energy neutrino detectors like IceCube but can also give rise to the neutrino non-standard interactions (NSIs). We consider a model based on the neutrinophilic two-Higgs doublets and study its imprints in the excess neutrino events in the 1–3 PeV energy bins at the IceCube. This is facilitated by the existence of a charged scalar in the model which can result in a Glashow-like resonance. The same charged scalar can be responsible for sizeable NSIs. We perform a combined study of the latest IceCube data along with various other constraints arising from different neutrino experiments together with the limits set by the LEP experiment, and explore the parameter space which can lead to a sizeable NSI.
Highlights
JHEP09(2021)113 involving leptoquarks, bileptons, as well as leptophilic doublet scalar, is performed in [35]
We perform a combined study of the latest IceCube data along with various other constraints arising from different neutrino experiments together with the limits set by the LEP experiment, and explore the parameter space which can lead to a sizeable non-standard interactions (NSIs)
We focus on a variant of neutrinophilic two Higgs doublet models (ν2HDM), as we have proposed in our previous work [51], that can lead to sizeable NSIs owing to the presence of couplings between neutrinos and the charged Higgs present in the model
Summary
Neutrinophilic 2HDMs, be it Z2-symmetric with possible Majorana masses [46, 47] or U(1)-symmetric with exclusive Dirac neutrino masses [48], do not give rise to NSIs. Other lepton flavour violating (LFV) processes e.g., α → βγ lead to relatively less stringent constraints on the relevant Yukawas, making ee and eτ the only sizeable NSIs in this model. These LFV constraints are considered in detail in the previous work [51]. In the current work we maintain all those constraints and the benchmark points, if and when needed, respect them as well After this brief discussion of our model set-up and the relevant notations and conventions, we shall discuss the signatures and prospects of probing the charged Higgs at the IceCube by focusing on the PeV events and NSIs
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