Abstract
We propose a new way to probe nonstandard interactions (NSI) of neutrinos with matter using the ultrahigh energy (UHE) neutrino data at current and future neutrino telescopes. We consider the Zee model of radiative neutrino mass generation as a prototype, which allows two charged scalars-one SU(2)_{L} doublet and one singlet, both being leptophilic, to be as light as 100GeV, thereby inducing potentially observable NSI with electrons. We show that these light charged Zee scalars could give rise to a Glashow-like resonance feature in the UHE neutrino event spectrum at the IceCube neutrino observatory and its high-energy upgrade IceCube-Gen2, which can probe a sizable fraction of the allowed NSI parameter space.
Highlights
Introduction.—The observation of ultrahigh energy (UHE) neutrinos at the IceCube neutrino observatory [1,2,3,4,5,6] has commenced a new era in neutrino astrophysics
Any anomalous features in the observed event spectrum could potentially be used as a probe of fundamental physics
The purpose of this Letter is to show that such a new resonance can arise naturally in the popular Zee model of radiative neutrino masses [10,11], which contains two charged scalars
Summary
Symmetry, making the diagonal entries of the neutrino mass matrix vanishing, is excluded by oscillation data [42,43] [11] that both the singlet and doublet charged scalar components can be as light as ∼100 GeV, while satisfying all existing theoretical and experimental constraints in both charged and neutral scalar sectors. Such light charged scalars can lead to sizable diagonal NSI of neutrinos with electrons, with the maximum allowed values of the NSI parameters ðεee; εμμ; εττÞ 1⁄4 ð8%; 3.8%; 43%Þ. ; ð2Þ where μ is the dimensionful coefficient of the cubic term μHi1Hj2εijη− in the scalar potential, with fi; jg being the SUð2ÞL indices and εij being the SUð2ÞL antisymmetric tensor
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