Results 1 - 10 of 3881
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[en] We present an analysis of the recent solar neutrino data from the five experiments using Bayesian approach. We extract quantitative and easily understandable information pertaining to the solar neutrino problem. The probability distributions for the individual neutrino fluxes and, discrepancy distribution for B and Be fluxes, which include theoretical and experimental uncertainties have been extracted. The analysis carried out assuming that the neutrinos are unaltered during their passage from the sun to earth, clearly indicate that the observed PP flux is consistent with the 1995 standard solar model predictions of Bahcall and Pinsonneault within 2σ (standard deviation), whereas the 8B flux is down by more than 12σ and the 7Be flux is maximally suppressed. We also deduce the experimental survival probability for the solar neutrinos as a function of their energy in a model-independent way. We find that the shape of that distribution is in qualitative agreement with the MSW oscillation predictions
[en] Recently, Bruggen et al. have derived analytic expressions for the electron neutrino survival probability for neutrinos undergoing matter-enhanced oscillations as they escape from the sun. These are derived using Landau-Zener oscillation formulas for nonadiabatic level crossings. For the solar density, they assume either a linear or an exponential form. However, the solar density is only roughly exponential. Using a uniform approximation, we generalize this method to an arbitrary monotonic solar density
[en] In principle the interaction of solar neutrinos with indium provides a very powerful method of measuring the energy spectrum of solar neutrinos in real time. In particular an indium target is unique in its capability to measure the energy spectrum of neutrinos from the basic proton-proton fusion process in the Sun and to detect the monoenergetic 7Be and p-e-p line sources. This report reviews the present status of attempts to develop a suitable indium detector. (Author). 26 refs.; 10 figs
[en] We analyze the existing solar neutrino experiment data and show the allowed regions. The result from SNO's salt phase itself restricts quite a lot the allowed region's area. Reactor neutrinos play an important role in determining oscillation parameters. KamLAND gives decisive conclusion on the solution to the solar neutrino puzzle, in particular, the spectral distortion in the 766.3 Ty KamLAND data gives another new improvement in the constraint of solar MSW-LMA solutions. We confirm that at 99.73% C.L. the high-LMA solution is excluded.