Measurement of the Solar pp-neutrino flux completed the measurement of Solar neutrino fluxes from the pp-chain of reactions in Borexino experiment. The result is in agreement with the prediction of ...the Standard Solar Model and the MSW/LMA oscillation scenario. A comparison of the total neutrino flux from the Sun with Solar luminosity in photons provides a test of the stability of the Sun on the 105 years time scale, and sets a strong limit on the power production by the unknown energy sources in the Sun.
The aim of the SOX-Borexino project is to verify or falsify the existence of eV-scale sterile neutrinos. The existence of sterile neutrinos is suspected because of several anomalies, which were ...observed in previous experiments. A ~3.7 PBq electron antineutrino source made of
144
Ce will be installed below the Borexino detector at LNGS, Italy, to search for short-baseline oscillations of active-to-sterile neutrinos within the detector volume. Source delivery and beginning of data acquisition is planned for end of 2016, preliminary results are expected already in 2017.
The detection of neutrinos emitted in the CNO reactions in the Sun is one of the ambitious goals of Borexino Phase-II. A measurement of CNO neutrinos would be a milestone in astrophysics, and would ...allow to solve serious issues in current solar models. A precise measurement of the rate of neutrinos from the pep reaction would allow to investigate neutrino oscillations in the MSW transition region. The pep and CNO solar neutrino physics, the measurement in Borexino Phase-I and the perspectives for the new phase are reviewed in this proceeding.
Recent results from Borexino Testera, G; Agostin, M; Altenmüller, K ...
Journal of physics. Conference series,
05/2016, Letnik:
718, Številka:
6
Journal Article
Recenzirano
Odprti dostop
We review the solar neutrinos results of Borexino and the limit on the charge conservation obtained in the context of the analysis of the low energy region of the energy spectrum.
Results are presented of a two-pion interferometry (HBT) analysis in Pb+Au collisions at 40, 80, and 158
A
GeV. A detailed study of the Bertsch–Pratt HBT radius parameters has been performed as ...function of the mean pair transverse momentum
k
t
and in bins of the centrality of the collision. From these results we extract model-dependent information about the space–time evolution of the reaction. An investigation of the effective volume of the pion emitting system provides an important tool to study the properties of thermal pion freeze-out.
The new limit on the electron lifetime is obtained from data of the Borexino experiment. The expected signal from the e → γν decay mode is a 256 keV photon detected in liquid scintillator. Because of ...the extremely low radioactive background level in the Borexino detector it was possible to improve the previous measurement by two orders of magnitude.
Geo-neutrino results with Borexino Roncin, R; Agostini, M; Appel, S ...
Journal of physics. Conference series,
01/2016, Letnik:
675, Številka:
1
Journal Article
Recenzirano
Odprti dostop
Borexino is a liquid scintillator detector primary designed to observe solar neutrinos. Due to its low background level as well as its position in a nuclear free country, Italy, Borexino is also ...sensitive to geo-neutrinos. Borexino is leading this interdisciplinary field of neutrino geoscience by studying electron antineutrinos which are emitted from the decay of radioactive isotopes present in the crust and the mantle of the Earth. With 2056 days of data taken between December 2007 and March 2015, Borexino observed 77 antineutrino candidates. If we assume a chondritic Th/U mass ratio of 3.9, the number of geo-neutrino events is found to be 23.7+6.5 -5.7(stat) +0.9-0.6 (syst). With this measurement, Borexino alone is able to reject the null geo-neutrino signal at 5.9σ, to claim a geo-neutrino signal from the mantle at 98% C.L. and to restrict the radiogenic heat production for U and Th between 23 and 36 TW.
This study sought to assess the probabilistic stability of slope analysis under seismic conditions in the middle of the Mzymta River Valley in Russia's Greater Sochi. In probabilistic analysis, ...almost all input parameters can be assigned a probability distribution; however, the seismic coefficient probability distribution has been difficult to define in previous studies. This study aims to assign a probability distribution to the seismic coefficient based on seismogram acceleration distribution. The study showed that seismogram-based probabilistic analysis is a feasible way to assess slope stability.
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