Signature of light sterile neutrinos at IceCube

Chauhan, Bhavesh; Mohanty, Sanghamitra

doi:10.1103/physrevd.98.083021

Cited by 20 publications

(17 citation statements)

References 60 publications

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“…To resolve a tension between the mass-squared differences of solar and reactor neutrinos in eq. 2.17, as well as to accommodate an eV sterile neutrino for a possible solution to the SBL anomalies [25] and ultra-high energy neutrino events at the IceCube detector [25,30,31,[46][47][48], we assume…”

Section: Possible Mass Orderingsmentioning

confidence: 99%

Challenge to anomalous phenomena in solar neutrino

Ahn

2021

J. High Energ. Phys.

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We suggest a would-be solution to the solar neutrino tension why solar neutrinos appear to mix differently from reactor antineutrinos, in theoretical respect. To do that, based on an extended theory with light sterile neutrinos added we derive a general transition probability of neutrinos born with one flavor tuning into a different flavor. Three new mass-squared differences are augmented in the extended theory: $$ \Delta {m}_{\mathrm{ABL}}^2\lesssim \mathcal{O}\left({10}^{-11}\right) $$ Δ m ABL 2 ≲ O 10 − 11 eV2 optimized at astronomical-scale baseline (ABL) oscillation experiments and one $$ \Delta {m}_{\mathrm{SBL}}^2\lesssim \mathcal{O}(1) $$ Δ m SBL 2 ≲ O 1 eV2 optimized at reactor short-baseline (SBL) oscillation experiments. With a so-called composite matter effect that causes a neutrino flavor change via the effects of sinusoidal oscillation including the Mikheyev-Smirnov-Wolfenstein matter effect, we find that the value of ∆m2 measured from reactor antineutrino experiments can be fitted with that from the 8B solar neutrino experiments for roughly $$ \Delta {m}_1^2\lesssim {10}^{-13} $$ Δ m 1 2 ≲ 10 − 13 eV2 and $$ \Delta {m}_2^2\simeq \mathcal{O}\left({10}^{-11}\right) $$ Δ m 2 2 ≃ O 10 − 11 eV2. Nonetheless, we find that the current data (solar neutrino alone) is not precise enough to test the proposed scenario. Future precise measurements of 8B and pep solar neutrinos may confirm and/or improve the value of $$ \Delta {m}_2^2 $$ Δ m 2 2 .

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Section: Possible Mass Orderingsmentioning

confidence: 99%

Challenge to anomalous phenomena in solar neutrino

Ahn

2021

J. High Energ. Phys.

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“…We discuss a scenario where an ultra high energetic (UHE) neutrino originates from an astrophysical source and while it travels towards the IceCube detector at the Earth, it interacts with the cosmic neutrino background (CνB) and get absorbed through a t-channel (and also u-channel) process mediated by a scalar causing a suppression of the neutrino flux. Earlier this kind of absorption process is explored in context of the production of a s-channel resonance [36][37][38][39][40], and also in the context of secret neutrino interactions [41][42][43]. Here we present a different scenario where we have an energy cutoff where the absorption process kicks off and it depends on kinematic viability.…”

Section: Introductionmentioning

confidence: 99%

Cutoff of IceCube neutrino spectrum due to t-channel resonant absorption by CνB

Mohanty

Narang

Sadhukhan

2019

J. Cosmol. Astropart. Phys.

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The non-observation of neutrinos by the IceCube at the Glashow resonance energy of 6.3 PeV has been a long standing unresolved issue. In this paper we propose a t-channel neutrino absorption by the CνB, which causes a cutoff at 4.5 PeV neutrino energy, to explain the IceCube observations. We present a neutrinophilic 2HDM where the neutrino masses are generated by a low scale seesaw mechanism. A O(10) MeV scalar mediates the interactions between left and right handed neutrinos and generates the t-channel diagram used for explaining the absence of Glashow resonance. The same scalar mediates the annihilation of the dark matter and generates the correct relic density.

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“…This extra neutrino species must be sterile to be compatible with the constraint on number of light neutrinos coupled to Z boson [8]. These observations in SBL experiments have motivated many authors in recent years to study the 3+1 neutrino scenario [9][10][11][12][13][14][15][16][17]. However, there has been a long standing problem of accommodating light sterile neutrino in the cosmological context [18,19].…”

Section: Introductionmentioning

confidence: 99%

Inflation models in the light of self-interacting sterile neutrinos

2020

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Short baseline neutrino experiments, like LSND and MiniBooNE experiments, pointed towards the existence of eV mass scale sterile neutrinos. To reconcile sterile neutrinos with cosmology self interaction between sterile neutrinos has been studied. We analysed Planck cosmic microwave background (CMB) data with self-interacting sterile neutrino (SIν) and study their impact on inflation models. The fit to the CMB data in SIν model is as good as the fit to ΛCDM model. We find that the spectral index (ns) values shift to 0.9375 ± 0.0058 in SIν model. This has significant impact on the validity of different inflation models. For example the Starobinsky and quartic hilltop model, which were allowed within ΛCDM cosmology, are ruled out. On the other hand some models like natural and Coleman-Weinberg inflation are now favoured. Therefore, the existence of self interacting sterile neutrinos with eV order of mass will play an important role in the selection of correct inflation model. *

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Signature of light sterile neutrinos at IceCube

Cited by 20 publications

References 60 publications

Challenge to anomalous phenomena in solar neutrino

Challenge to anomalous phenomena in solar neutrino

Cutoff of IceCube neutrino spectrum due to t-channel resonant absorption by CνB

Inflation models in the light of self-interacting sterile neutrinos

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