نتایج جستجو برای: neutrino oscillation
تعداد نتایج: 57668 فیلتر نتایج به سال:
We present a global analysis of neutrino oscillation data within the threeneutrino oscillation scheme, including in our fit all the current solar neutrino data, the reactor neutrino data from KamLAND and CHOOZ, the atmospheric neutrino data from Super-Kamiokande and MACRO, and the first data from the K2K long-baseline accelerator experiment. We determine the current best fit values and allowed ...
The neutral current effects of the future high statistics atmospheric neutrino data can be used to distinguish the mechanisms between a νμ oscillation to a tau neutrino or to a sterile neutrino. However, if neutrinos possess large diagonal and/or transition magnetic moments, the neutrino magnetic moments can contribute to the neutral current effects which can be studied by the single π0 product...
We present an overview of the future projects concerning the neutrino oscillation physics in Europe. Recently a joint CERN–LNGS scientific committee has reviewed several proposals both for the study of atmospheric neutrinos and for long (LBL) and short baseline (SBL) neutrino oscillation experiments. The committee has indicated the priority that the European high energy physics community should...
We investigate the Big-Bang Nucleosynthesis constraints on neutrino mixing in the framework of the two four-neutrino schemes that are favored by the results of neutrino oscillation experiments. We discuss the implications of these constraints for terrestrial short and long-baseline neutrino oscillation experiments and we present some possibilities of testing them in these experiments. In partic...
The LMA solution of the solar neutrino problem has been explored with the 1,000 ton liquid scintillator detector, KamLAND. It utilizes nuclear power reactors distributing effectively ∼180 km from the experimental site. Comparing observed neutrino rate with the calculation of reactor operation histories, an evidence for reactor neutrino disappearance has been obtained from 162 ton·year exposure ...
The three neutrino model has 9 physical parameters, 3 neutrino masses, 3 mixing angles and 3 CP violating phases. Among them, neutrino oscillation experiments can probe 6 parameters: 2 mass squared differences, 3 mixing angles, and 1 CP phase. The experiments performed so far determined the magnitudes of the two mass squared differences, the sign of the smaller mass squared difference, the magn...
Upward-going stopping muons initiated by atmospheric νμ and νμ interactions in the rock below the Soudan 2 detector have been isolated, together with a companion sample of neutrinoinduced single muons, created within the detector, which travel downwards and exit. The downward-going sample is consistent with the atmospheric-neutrino flux prediction, but the upward-going sample exhibits a sizeabl...
The possible existence of neutrino masses is the first signal beyond the standard model, which suggests grand unification. The KEK-to-Kamioka long-baseline neutrino experiment (K2K) 1 is motivated by the atmospheric neutrino anomaly found by the Kamiokande experiment . One possible explanation of the anomaly is neutrino oscillation. Later, the Super–Kamiokande (SK) group confirmed the deficit o...
In this note we investigate the impact of new physics in the form of general four-fermion interactions on neutrino oscillation signals. We develop a field theoretic description of the overall oscillation process which includes the non-standard interactions during the neutrino production, propagation and detection stages. Insights gained during the development of this formalism regarding the pos...
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