Sensitivity to neutrino decay with atmospheric neutrinos at the INO-ICAL detector

Choubey, Sandhya; Goswami, Sumanta; Gupta, Chandan; Lakshmi, S.; Thakore, T.

doi:10.1103/physrevd.97.033005

Cited by 42 publications

(36 citation statements)

References 76 publications

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“…According to the Physics White Paper of the ICAL (INO) Collaboration [366], after 10 years run, INO will be able to identify the correct neutrino mass ordering with a significance larger than 3σ. As the experiments discussed above, the atmospheric neutrino results from INO can also be used to test the presence of new physics beyond the SM, such as CPT-or Lorentz violation [368], sterile neutrinos [369,370], dark matter related studies [371,372], non-standard neutrino interactions [373] or decaying neutrinos [374].…”

Section: Atmospheric Experimentsmentioning

confidence: 99%

Neutrino Mass Ordering from Oscillations and Beyond: 2018 Status and Future Prospects

Salas

Gariazzo

Mena

et al. 2018

Front. Astron. Space Sci.

194

197

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The ordering of the neutrino masses is a crucial input for a deep understanding of flavor physics, and its determination may provide the key to establish the relationship among the lepton masses and mixings and their analogous properties in the quark sector. The extraction of the neutrino mass ordering is a data-driven field expected to evolve very rapidly in the next decade. In this review, we both analyze the present status and describe the physics of subsequent prospects. Firstly, the different current available tools to measure the neutrino mass ordering are described. Namely, reactor, long-baseline (accelerator and atmospheric) neutrino beams, laboratory searches for beta and neutrinoless double beta decays and observations of the cosmic background radiation and the large scale structure of the universe are carefully reviewed. Secondly, the results from an up-to-date comprehensive global fit are reported: the Bayesian analysis to the 2018 publicly available oscillation and cosmological data sets provides strong evidence for the normal neutrino mass ordering versus the inverted scenario, with a significance of 3.5 standard deviations. This preference for the normal neutrino mass ordering is mostly due to neutrino oscillation measurements. Finally, we shall also emphasize the future perspectives for unveiling the neutrino mass ordering. In this regard, apart from describing the expectations from the aforementioned probes, we also focus on those arising from alternative and novel methods, as 21 cm cosmology, core-collapse supernova neutrinos and the direct detection of relic neutrinos.10 Here, σ 8 corresponds to the normalization of the matter power spectrum on scales of 8h −1 Mpc, see Equation (13). 11 The thermal SZ thermal effect consists on a spectral distortion on CMB photons which arrive along the line of sight of a cluster.

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Section: Atmospheric Experimentsmentioning

confidence: 99%

Neutrino Mass Ordering from Oscillations and Beyond: 2018 Status and Future Prospects

Salas

Gariazzo

Mena

et al. 2018

Front. Astron. Space Sci.

194

197

View full text Add to dashboard Cite

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“…Concerning atmospheric neutrinos, the sensitivity to the invisible neutrino decay at the proposed India-based Neutrino Observatory (INO) has been analyzed in Ref. [47]. After 10 years of data taking, it is found that INO could put a limit of τ 3 /m 3 > 1.51 × 10 −10 s/eV at 90% C.L.…”

Section: Other Future Prospects For Invisible Neutrino Decaymentioning

confidence: 99%

Constraining the invisible neutrino decay with KM3NeT-ORCA

et al. 2019

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Several theories of particle physics beyond the Standard Model consider that neutrinos can decay. In this work we assume that the standard mechanism of neutrino oscillations is altered by the decay of the heaviest neutrino mass state into a sterile neutrino and, depending on the model, a scalar or a Majoron. We study the sensitivity of the forthcoming KM3NeT-ORCA experiment to this scenario and find that it could improve the current bounds coming from oscillation experiments, where three-neutrino oscillations have been considered, by roughly two orders of magnitude. We also study how the presence of this neutrino decay can affect the determination of the atmospheric oscillation parameters sin 2 θ 23 and ∆m 2 31 , as well as the sensitivity to the neutrino mass ordering.the CP phase δ. These parameters have been measured in solar, reactor, atmospheric and long-baseline accelerator neutrino oscillation experiments. The level of precision reached by current experiments is such that, from the global picture [1-5], neutrino oscillation physics is entering the precision era. However, there are still some unknowns to be established: 1. The true ordering of neutrino masses: we still do not know if the order of the neutrino mass spectrum is normal (NO), where m 3 is the heaviest mass state, or inverted (IO), where m 2 is the heaviest one. Recent oscillation results show a preference for NO [1, 2], although the real neutrino mass ordering is not fully determined yet [6]. 2. The octant of the atmospheric angle: the measured value of sin 2 θ 23 is close to maximal (0.5), but it can be either smaller (lower octant) or larger (upper octant). 3. The exact value of the CP phase δ: values of δ ≈ 0.5π are now highly disfavored, but still a large part of the parameter space remains allowed. At 2σ confidence level, CP might be maximally violated, but also conserved. 4. The absolute scale of neutrino masses: so far there are only upper bounds on it, coming from beta decay experiments and cosmological measurements [7]. 5. The nature of neutrinos: are they Dirac or Majorana particles? In the latter case, there are two extra CP phases to be determined, which are only accessible through neutrinoless double beta decay experiments (see e.g. [8]).The last two points can not be determined by neutrino oscillation experiments, since flavor oscillations are insensitive to the absolute neutrino masses and to the Majorana CP phases. Conversely, the three first issues are expected to be solved by the future long-baseline experiment DUNE, which will measure very well the mass ordering [9] as well as the value of the CPviolating phase and the octant of the atmospheric mixing angle [10] within the standard three-neutrino picture. The determination of the mass ordering of neutrinos is also one of the main physics goals of the future atmospheric experiment ORCA (Oscillation Research with Cosmics in the Abyss) [11], that will provide precise measurements of the atmospheric parameters too. ORCA will be basically an updated version of the ANTARES neutrino...

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“…Recently a combined analysis of NOvA and T2K data points to a result of τ 3 /m 3 > 1.5 × 10 −12 s/eV along with the constraints by individual experiments: τ 3 /m 3 ≥ 7 × 10 −13 s/eV in NOvA and τ 3 /m 3 ≥ 1.41 × 10 −12 s/eV in T2K [32]. The expected bounds for JUNO [29], INO [30] and DUNE [31] can reach τ 3 /m 3 > 7.5 (5.5) × 10 −11 s/eV at 95% (99%) C.L., τ 3 /m 3 > 1.51 × 10 −10 s/eV at 90% C.L. and τ 3 /m 3 > 4.5 × 10 −11 s/eV at 90% C.L., respectively.…”

Section: Introductionmentioning

confidence: 99%

Invisible neutrino decays at the MOMENT experiment

Tang

Wang

Zhang

2019

J. High Energ. Phys.

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We investigate invisible decays of the third neutrino mass eigenstate in future accelerator neutrino experiments using muon-decay beams such as MuOn-decay MEdium baseline NeuTrino beam experiment (MOMENT). MOMENT has outstanding potential to measure the deficit or excess in the spectra caused by neutrino decays, especially in ν µ andν µ disappearance channels. Such an experiment will improve the constraints of the neutrino lifetime τ 3 . Compared with exclusion limits in the current accelerator neutrino experiments T2K and NOvA under the stable ν assumption, we expect that MOMENT gives the bound of τ 3 /m 3 ≥ 10 −11 s/eV at 3σ, which is better than their recent limits: τ 3 /m 3 ≥ 7 × 10 −13 s/eV in NOvA and τ 3 /m 3 ≥ 1.41 × 10 −12 s/eV in T2K. The non-decay scenario is expected to be excluded by MOMENT at a confidence level > 3σ, if the best fit results in T2K and NOvA are confirmed. We further find that reducing systematic uncertainties is more important than the running time. Finally, we find some impact of τ 3 /m 3 on the precision measurement of other oscillation parameters.

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Sensitivity to neutrino decay with atmospheric neutrinos at the INO-ICAL detector

Cited by 42 publications

References 76 publications

Neutrino Mass Ordering from Oscillations and Beyond: 2018 Status and Future Prospects

Neutrino Mass Ordering from Oscillations and Beyond: 2018 Status and Future Prospects

Constraining the invisible neutrino decay with KM3NeT-ORCA

Invisible neutrino decays at the MOMENT experiment

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