Attenuation effect and neutrino oscillation tomography

Ioannisian, Ara; Smirnov, A. Yu.

doi:10.1103/physrevd.96.083009

Cited by 12 publications

(9 citation statements)

References 23 publications

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“…The observed regeneration/survival probability gives another way to determine the oscillation parameters directly. We may also study some relevant effect in day/night flux difference like attenuation effect [61] which was recently pointed out.…”

Section: Current Situation Of the Solar Neutrinosmentioning

confidence: 97%

The Super-Kamiokande experiment

Suzuki

2019

Eur. Phys. J. C

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Super-Kamiokande is a gigantic and versatile detector able to detect neutrinos with energies between a few MeV and a few hundred GeV. Super-K started data taking on 1st of April in 1996 after 5 years construction period and obtained compelling evidence of atmospheric neutrino oscillations in 1998, shortly after the beginning of the experiment. In 2001 SNO in Canada together with the Super-K data established that solar neutrinos are also oscillating. Following those historical discoveries, numerous intriguing results have been obtained by Super-K, like the discovery of oscillatory behavior, tau appearance in the atmospheric neutrinos, the matter effect of the solar neutrinos through the earth. The Super-K detector has also been used as a far detector of the long baseline neutrino oscillation experiments, K2K and T2K. In this article, we report mostly on the studies of the neutrino oscillations by Super-K in a historical context. The prospects for the future of Super-K are also described.

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Section: Current Situation Of the Solar Neutrinosmentioning

confidence: 97%

The Super-Kamiokande experiment

Suzuki

2019

Eur. Phys. J. C

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“…A precise measurement of the zenith angle distribution might hint at new phenomena. 119) The day/night asymmetry expected at the Super-K site is about 2-3%, and is mostly in the high-energy region. Precise measurements of the solar day/night effect were made using full SK-I, II and III data and 1,306 days of data from SK-IV covering from May, 1996 until December, 2017, 105),120), 121) as shown in Fig.…”

Section: Oscillation Parametersmentioning

confidence: 97%

The Sun, neutrinos and Super-Kamiokande

Suzuki

2020

Proceedings of the Japan Academy. Ser. B: Physical and Biologic

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In the standard model of elementary particle physics neutrinos are massless, and therefore the actuality of finite neutrino mass indicates a theory beyond the standard model. The Sun produces abundant neutrinos due to nuclear fusion reactions. A pioneering experiment in the early '70s detected neutrinos from the Sun, but found that the observed flux was smaller than expected, which was then called the missing solar neutrino problem. Tremendous efforts were made both experimentally and theoretically to solve this problem. In 2001, almost 30 years after the first indication, data from Super-Kamiokande in Japan and SNO in Canada together provided evidence that neutrino oscillation effectively converts the solar (electron) neutrinos to non-electron type neutrinos. Neutrino oscillation can occur only for those neutrinos with finite neutrino mass.

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“…Indeed, there have been several proposals to use atmospheric neutrinos, which originate from the decays of hadrons created when cosmic rays hit the atmosphere, to measure the matter profile. The most conceptually simple method is via the attenuation of atmospheric neutrinos [9][10][11][12][13][14][15][16][17][18]. Atmospheric neutrinos span several orders of magnitude in energy, from the tens of MeV to beyond tens of TeV.…”

Section: Introductionmentioning

confidence: 99%

DUNE atmospheric neutrinos: Earth Tomography

Kelly,

Machado,

Martinez-Soler

et al. 2021

Preprint

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In this paper we show that the DUNE experiment can measure the Earth's density profile by analyzing atmospheric neutrino oscillations. The crucial feature that enables such measurement is the detailed event reconstruction capability of liquid argon time projection chambers. This allows for studying the sub-GeV atmospheric neutrino component, which bears a rich oscillation phenomenology, strongly dependent on the matter potential sourced by the Earth. We provide a pedagogical discussion of the MSW and parametric resonances and their role in measuring the core and mantle densities. By performing a detailed simulation, accounting for particle reconstruction at DUNE, nuclear physics effects relevant to neutrino-argon interactions and several uncertainties on the atmospheric neutrino flux, we manage to obtain a robust estimate of DUNE's sensitivity to the Earth matter profile. We find that DUNE can measure the total mass of the Earth at 8.4% precision with an exposure of 400 kton-year. By accounting for previous measurements of the total mass and moment of inertia of the Earth, the core, lower mantle and upper mantle densities can be determined with 8.8%, 13% and 22% precision, respectively, for the same exposure. Finally, for a low exposure run of 60 kton-year, which would correspond to two far detectors running for three years, we have found that the core density could be measured by DUNE at " 30% precision.

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Attenuation effect and neutrino oscillation tomography

Cited by 12 publications

References 23 publications

The Super-Kamiokande experiment

The Super-Kamiokande experiment

The Sun, neutrinos and Super-Kamiokande

DUNE atmospheric neutrinos: Earth Tomography

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