نتایج جستجو برای: neutrino detection
تعداد نتایج: 586258 فیلتر نتایج به سال:
νx + 208 Pb ⇒ Pb + ν ′ x (NC) ⇓ Pb+ xγ + yn The number of neutrons emitted (0, 1, or 2) depends on the neutrino energy and whether the interaction is via the charged current (CC) or neutral current (NC). The nuclear physics of this system is described in Ref. [4]. A lead-based neutrino detector must have an appreciable density of Pb atoms and the capability of detecting the electrons, gammas an...
We propose a β-decay experiment based on a sample of ultracold atomic tritium. These initial conditions enable detection of the helium ion in coincidence with the β. We construct a two-dimensional fit incorporating both the shape of the β-spectrum and the direct reconstruction of the neutrino mass peak. We present simulation results of the feasible limits on the neutrino mass achievable in this...
We show in detail the general relationship between the Schrödinger equation approach to calculating the MSW effect and the quantum field-theoretical S-matrix approach. We show the precise form a generic neutrino propagator must have to allow a physically meaningful ‘‘oscillation probability’’ to be decoupled from neutrino production fluxes and detection cross sections, and explicitly list the c...
We briefly discuss the history of suggestions for timeof-flight effects due to nonzero neutrino mass and a recent proposal that such effects can be used to determine the parameters of cosmology. With neutrinos there is potentially a much deeper “look back time” than with photons. We note a new point, that if future large scale neutrino detection arrays see long-time secular variations in counti...
This article describes the seven experiments Homestake, Kamiokande, SAGE, GALLEX, Super-Kamiokande, GNO and SNO which have so far provided data on the measurement of the solar neutrino fluxes. The detection mechanism, the salient features of the detectors and the results of each experiment are presented. How the solar neutrino problem has evolved and became more focused with each experimental d...
A core collapse in the Milky Way will produce an enormous burst of neutrinos in detectors worldwide. Such a burst has the potential to provide an early warning of a supernova's appearance. I will describe the nature of the signal, the sensitivity of current detectors, and SNEWS, the SuperNova Early Warning System, a network designed to alert astronomers as soon as possible after the detected ne...
The prospects of measuring the leptonic angles and CP-odd phases at a neutrino factory are discussed in the scenario of three active plus one sterile neutrino, motivated by the νμ → νe LSND signal. Sensitivity to the MNS mixing matrix angles at O(10) is achieved with a 1 T detector at ∼ 1 km from the source, whereas leptonic CP-violation can be measured through tau detection with a 1 kT detecto...
The NOMAD experiment is searching for ! oscillations in the CERN wide-band neutrino beam and is sensitive to neutrino mass diiernces m 2 > 1 eV 2. Signal detection is based on the observation of ? decays by means of kinematic selection criteria. The detector was completed in 1995 and all subdetectors have been functioning well during the 1995 and 1996 data taking periods. Preliminary results fr...
The IceCube neutrino telescope, to be constructed near the Antarctic South Pole, represents the next generation of neutrino telescope. Its large 1 km size will make it uniquely sensitive to the detection of neutrinos from astrophysical sources. The current design of the detector is presented. The basic performance of the detector and its ability to search for neutrinos from various astrophysica...
In this talk, we discuss the potential for the indirect detection of Kaluza-Klein dark matter using neutrino telescopes and cosmic positron experiments. We find that future kilometer-scale neutrino telescopes, such as IceCube, as well as future experiments capable of measuring the cosmic positron spectrum, such as PAMELA and AMS-02, will be quite sensitive to this scenario. Current data from th...
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