Lorentz invariance violation and IceCube neutrino events

Tomar, Gaurav; Mohanty, Sanghamitra; Pakvasa, Sandip

doi:10.1007/jhep11(2015)022

Cited by 31 publications

(25 citation statements)

References 42 publications

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“…The absence of the Glashow resonance is discussed in details in refs. [81][82][83] -23 -where m Σ 0 R and τ Σ 0 R denote the mass and lifetime of the DM particle Σ 0 R and dN (E ν )/dE ν is the energy spectrum of neutrinos produced in the decay of the DM. We compute dN (E ν )/dE ν for primary as well as secondary neutrinos using the methods outlined in ref.…”

Section: Icecube Pev Eventsmentioning

confidence: 99%

Multi-component fermionic dark matter and IceCube PeV scale neutrinos in left-right model with gauge unification

Borah¹,

Dasgupta²,

Dey³

et al. 2017

J. High Energ. Phys.

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We consider a simple extension of the minimal left-right symmetric model (LRSM) in order to explain the PeV neutrino events seen at the IceCube experiment from a heavy decaying dark matter. The dark matter sector is composed of two fermions: one at PeV scale and the other at TeV scale such that the heavier one can decay into the lighter one and two neutrinos. The gauge annihilation cross sections of PeV dark matter are not large enough to generate its relic abundance within the observed limit. We include a pair of real scalar triplets Ω L,R which can bring the thermally overproduced PeV dark matter abundance into the observed range through late time decay and consequent entropy release thereby providing a consistent way to obtain the correct relic abundance without violating the unitarity bound on dark matter mass. Another scalar field, a bitriplet under left-right gauge group is added to assist the heavier dark matter decay. The presence of an approximate global U(1) X symmetry can naturally explain the origin of tiny couplings required for long-lived nature of these decaying particles. We also show, how such an extended LRSM can be incorporated within a non-supersymmetric SO(10) model where the gauge coupling unification at a very high scale naturally accommodate a PeV scale intermediate symmetry, required to explain the PeV events at IceCube.

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Section: Icecube Pev Eventsmentioning

confidence: 99%

Multi-component fermionic dark matter and IceCube PeV scale neutrinos in left-right model with gauge unification

Borah¹,

Dasgupta²,

Dey³

et al. 2017

J. High Energ. Phys.

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“…Several neutrino oscillation experiments such as liquid scintillator neutrino detector (LSND) [35], main injector neutrino oscillation search (MINOS) [36][37][38], mini booster neutrino experiment (Mini-BooNE) [39], Double Chooz [40], Super-Kamiokande (SK) [41], IceCube [42,43], and T2K [44] have searched for these LIV/CPT-violating effects in their datasets and have placed competitive constraints on these LIV/CPT-violating parameters. Besides the above mentioned studies by the official Collaborations, there are also several other independent attempts on constraining LIV/CPT-violating parameters in the context of long-baseline accelerator neutrinos [45][46][47][48][49][50][51], shortbaseline reactor antineutrinos [52], atmospheric neutrinos [53][54][55], solar neutrinos [56], and high-energy astrophysical neutrinos [57][58][59]. Hadron colliders such as LHC can also provide unique opportunity to test LIV/CPT-violating effects at high energy [60,61].…”

Section: Introductionmentioning

confidence: 99%

Can Lorentz invariance violation affect the sensitivity of deep underground neutrino experiment?

Agarwalla

Masud

2020

Eur. Phys. J. C

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We examine the impact of Lorentz Invariance Violation (LIV) in measuring the octant of $$\theta _{23}$$θ23 and CP phases in the context of the Deep Underground Neutrino Experiment (DUNE). We consider the CPT-violating LIV parameters involving $$e - \mu $$e-μ ($$a_{e\mu }$$aeμ) and $$e - \tau $$e-τ ($$a_{e\tau }$$aeτ) flavors, which induce an additional interference term in neutrino and antineutrino appearance probabilities. This new interference term depends on both the standard CP phase $$\delta $$δ and the new dynamical CP phase $$\varphi _{e\mu }$$φeμ/$$\varphi _{e\tau }$$φeτ, giving rise to new degeneracies among ($$\theta _{23}$$θ23, $$\delta $$δ, $$\varphi $$φ). Taking one LIV parameter at-a-time and considering a small value of $$|a_{e\mu }| = |a_{e\tau }| = 5 \times 10^{-24}$$|aeμ|=|aeτ|=5×10-24 GeV, we find that the octant discovery potential of DUNE gets substantially deteriorated for unfavorable combinations of $$\delta $$δ and $$\varphi _{e\mu }$$φeμ/$$\varphi _{e\tau }$$φeτ. The octant of $$\theta _{23}$$θ23 can only be resolved at $$3\sigma $$3σ if the true value of $$\sin ^2\theta _{23} \lesssim 0.42$$sin2θ23≲0.42 or $$ > rsim 0.62$$≳0.62 for any choices of $$\delta $$δ and $$\varphi $$φ. Interestingly, we also observe that when both the LIV parameters $$a_{e\mu }$$aeμ and $$a_{e\tau }$$aeτ are present together, they cancel out the impact of each other to a significant extent, allowing DUNE to largely regain its octant resolution capability. We also reconstruct the CP phases $$\delta $$δ and $$\varphi _{e\mu }$$φeμ/$$\varphi _{e\tau }$$φeτ. The typical $$1\sigma $$1σ uncertainty on $$\delta $$δ is 10–15$$^{\circ }$$∘ and the same on $$\varphi _{e\mu }$$φeμ/$$\varphi _{e\tau }$$φeτ is 25–30$$^{\circ }$$∘ depending on the choices of their true values.

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“…Depletion of high-energy neutrinos can occur via oscillation to sterile neutrinos in pseudo-Dirac neutrinos [32] and for visible decay [33]. Exotic scenarios have also been invoked to explain a cutoff at the Glashow resonance energies such as Lorentz violation [10,34] and CPT violation [35].…”

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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Lorentz invariance violation and IceCube neutrino events

Cited by 31 publications

References 42 publications

Multi-component fermionic dark matter and IceCube PeV scale neutrinos in left-right model with gauge unification

Multi-component fermionic dark matter and IceCube PeV scale neutrinos in left-right model with gauge unification

Can Lorentz invariance violation affect the sensitivity of deep underground neutrino experiment?

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

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