Earth regeneration of solar neutrinos at SNO and Super-Kamiokande

Barger, V.; Marfatia, Danny; Whisnant, K.; Wood, B. P.

doi:10.1103/physrevd.64.073009

Cited by 45 publications

(65 citation statements)

References 73 publications

(66 reference statements)

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“…Detectors based on organic scintillator such as Borexino and KamLAND [30,7] have a yield of 2.50 events per ton of 12 C, see Table I. With any carbon-based detector there will be backgrounds from 14 C. Borexino should have a ratio 14 C/ 12 C of the order 10 −18 [30].…”

Section: Supernova Signals In Various Detectorsmentioning

confidence: 99%

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Supernova observation via neutrino-nucleus elastic scattering in the CLEAN detector

2003

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Development of large mass detectors for low-energy neutrinos and dark matter may allow supernova detection via neutrino-nucleus elastic scattering. An elastic-scattering detector could observe a few, or more, events per ton for a galactic supernova at 10 kpc (3.1 × 10 20 m). This large yield, a factor of at least 20 greater than that for existing light-water detectors, arises because of the very large coherent cross section and the sensitivity to all flavors of neutrinos and antineutrinos. An elastic scattering detector can provide important information on the flux and spectrum of νµ and ντ from supernovae. We consider many detectors and a range of target materials from 4 He to 208 Pb. Monte Carlo simulations of low-energy backgrounds are presented for the liquid-neon-based Cryogenic Low Energy Astrophysics with Noble gases (CLEAN) detector. The simulated background is much smaller than the expected signal from a galactic supernova.

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Section: Supernova Signals In Various Detectorsmentioning

confidence: 99%

“…Existing detectors measure ν x via neutral-current inelastic reactions on oxygen [5], deuterium [6], or carbon [7]. Here the observed energy deposition does not depend on the neutrino energy as long as it is above threshold.…”

Section: Introductionmentioning

confidence: 99%

Supernova observation via neutrino-nucleus elastic scattering in the CLEAN detector

2003

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“…(17) Notice that here the adiabatic phase should be calculated from the center of trajectory to a given point x, which corresponds to the explicit analytic expression obtained in Ref. [24].…”

Section: Second Order Corrections To the Oscillation Probabilitiesmentioning

confidence: 99%

Precise analytical description of the Earth matter effect on oscillations of low energy neutrinos

et al. 2005

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We present a formalism for the matter effects in the Earth on low energy neutrino fluxes which is both accurate and has all advantages of a full analytic treatment. The oscillation probabilities are calculated up to second order term in ǫ(x) ≡ 2V (x)E/∆m 2 where V (x) is the neutrino potential at position x. We show the absence of large undamped phases which makes the expansion in ǫ well behaved. An improved expansion is presented in terms of the variation of V (x) around a suitable mean value which allows to treat energies up to those relevant for Supernova neutrinos. We discuss also the case of three-neutrino mixing.

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“…The inverted hierarchy (ordering) is disfavored by supernova SN1987A data [35] (see, however, [36]). Normal hierarchy implies that m atm .…”

Section: Experimental Inputmentioning

confidence: 99%

Structure of neutrino mass matrix and CP-violation

Frigerio

Smirnov

2002

Nuclear Physics B

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We reconstruct the neutrino mass matrix in the flavor basis, using all available experimental data from neutrino oscillations. Majorana nature of neutrinos, normal mass hierarchy (ordering) and validity of the LMA MSW solution of the solar neutrino problem are assumed. We study dependences of the mass matrix elements, m αβ , on the CP violating Dirac, δ, and Majorana, ρ, σ, phases, for different values of the mixing angle θ 13 and of the absolute mass scale, m 1 . The contours of constant mass in the ρ − σ plane have been constructed for all m αβ . Possible structures of the mass matrix have been analyzed. We identify regions of parameters in which the matrix has (i) a structure with the dominant µτ -block, (ii) various hierarchical structures, (iii) structures with special ordering or equalities of elements, (iv) the democratic form. In certain cases the matrix can be parameterized by powers of a unique expansion (ordering) parameter λ ≈ 0.2 − 0.3 (λ ord ≈ 0.6 − 0.7). Perspectives to further restrict the structure of mass matrix in future experiments, in particular in the ββ 0ν -decay searches, are discussed.

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Earth regeneration of solar neutrinos at SNO and Super-Kamiokande

Cited by 45 publications

References 73 publications

Supernova observation via neutrino-nucleus elastic scattering in the CLEAN detector

Supernova observation via neutrino-nucleus elastic scattering in the CLEAN detector

Precise analytical description of the Earth matter effect on oscillations of low energy neutrinos

Structure of neutrino mass matrix and CP-violation

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