KM3NeT/ORCA: status and perspectives for neutrino oscillation and mass hierarchy measurements

Kalaczyński, P.

doi:10.22323/1.390.0149

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…ANTARES has recorded additional data from 2017 to 2022, which represents a ∼50% increase with respect to that used in the present analysis and are currently being analysed. Furthermore, the next generation of neutrino telescopes in the Mediterranean Sea, KM3NeT-ORCA and -ARCA, now under deployment [71][72][73][74], are expected to further improve these limits. Open Access.…”

Section: Discussionmentioning

confidence: 99%

Search for non-standard neutrino interactions with 10 years of ANTARES data

Albert

Alves

André

et al. 2022

J. High Energ. Phys.

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Non-standard interactions of neutrinos arising in many theories beyond the Standard Model can significantly alter matter effects in atmospheric neutrino propagation through the Earth. In this paper, a search for deviations from the prediction of the standard 3-flavour atmospheric neutrino oscillations using the data taken by the ANTARES neutrino telescope is presented. Ten years of atmospheric neutrino data collected from 2007 to 2016, with reconstructed energies in the range from ∼16 GeV to 100 GeV, have been analysed. A log-likelihood ratio test of the dimensionless coefficients εμτ and εττ − εμμ does not provide clear evidence of deviations from standard interactions. For normal neutrino mass ordering, the combined fit of both coefficients yields a value 1.7σ away from the null result. However, the 68% and 95% confidence level intervals for εμτ and εττ − εμμ, respectively, contain the null value. Best fit values, one standard deviation errors and bounds at the 90% confidence level for these coefficients are given for both normal and inverted mass orderings. The constraint on εμτ is among the most stringent to date and it further restrains the strength of possible non-standard interactions in the μ − τ sector.

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Section: Discussionmentioning

confidence: 99%

Search for non-standard neutrino interactions with 10 years of ANTARES data

Albert

Alves

André

et al. 2022

J. High Energ. Phys.

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“…The bounds obtained with ANTARES are more restrictive than what is allowed by current experimental constraints. The next generation of neutrino telescopes in the Mediterranean Sea, KM3NeT-ORCA and -ARCA, now under deployment [65,66,67,68], are expected to further improve these limits.…”

Section: Discussionmentioning

confidence: 99%

Search for non-standard neutrino interactions with 10 years of ANTARES data

Albert¹,

Alves²,

André³

et al. 2021

Preprint

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Non-standard interactions of neutrinos arising in many beyond the Standard Model physics models can significantly alter matter effects in atmospheric neutrino propagation through the Earth. In this paper, a search for deviations from the prediction of the standard 3-flavour atmospheric neutrino oscillations using the data taken by the ANTARES neutrino telescope is presented. Ten years of atmospheric neutrino data collected from 2007 to 2016, with energies in the range ∼[5 − 10 4 ] GeV, have been analysed. As a result, a log-likelihood ratio test yields best-fit values of the dimensionless coefficients that quantify the strength of non-standard interactions between the neutrino flavours, namely, ε µτ and ε τ τ , which are non-zero at the 1.7σ and 1.6σ level for the normal (NO) and inverted (IO) mass orderings, respectively. While the best-fit values ε µτ = (−1.3 +1.8 −2.0 ) × 10 −3 (NO) and (1.3 +1.9 −1.8 ) × 10 −3 (IO) are compatible with zero within its 68% C.L., the values of ε τ τ = (3.2 +1.4 −0.8 ) × 10 −2 (NO) and (−3.2 +1.9 −1.1 ) × 10 −2 (IO) are compatible with zero only within its 95% C.L. range. The constraint on ε µτ is slightly more stringent than current bounds from other experiments and it further restrains the strength of possible non-standard interactions in the µ − τ sector.

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“…Such a detector, like the planned ORCA, will efficiently detect the Cherenkov radiation emitted along the path of μ ± produced by the interactions of ν μ and νμ with the nucleons in the instrumented volume or near it. In addition, it will be posible to detect showers due to the e or τ produced by the associated neutrinos [54,67,68].…”

Section: Neutrino Events and Test Of Earth's Compositionmentioning

confidence: 99%

Oscillation tomografy study of Earth’s composition and density with atmospheric neutrinos

et al. 2022

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Knowledge of the composition of the Earth’s interior is highly relevant to many geophysical and geochemical problems. Neutrino oscillations are modified in a non-trivial way by the matter effects and can provide valuable and unique information not only on the density but also on the chemical and isotopic composition of the deep regions of the planet. In this paper, we re-examine the possibility of performing an oscillation tomography of the Earth with atmospheric neutrinos and antineutrinos to obtain information on the composition and density of the outer core and the mantle, complementary to that obtained by geophysical methods. Particular attention is paid to the D$$^{\prime \prime }$$ ″ layer just above the core-mantle boundary and to the water (hydrogen) content in the mantle transition zone. Our analysis is based on a Monte-Carlo simulation of the energy and azimuthal angle distribution of $$\mu $$ μ -like events generated by neutrinos. Taking as reference a model of the Earth consisting of 55 concentric layers with constant densities determined from the PREM, we evaluate the effect on the number of events due to changes in the composition and density of the outer core and the mantle. To examine the capacity of a detector like ORCA to resolve such variations, we construct regions in planes of two of these quantities where the statistical significance of the discrepancies between the reference and the modified Earth are less than $$1\sigma $$ 1 σ . The variations are implemented in such a way that the constraint imposed by both the total mass of the Earth and its moment of inertia are verified.

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KM3NeT/ORCA: status and perspectives for neutrino oscillation and mass hierarchy measurements

Cited by 5 publications

References 13 publications

Search for non-standard neutrino interactions with 10 years of ANTARES data

Search for non-standard neutrino interactions with 10 years of ANTARES data

Search for non-standard neutrino interactions with 10 years of ANTARES data

Oscillation tomografy study of Earth’s composition and density with atmospheric neutrinos

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