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AbstractAbstract
[en] This review is organised as follows. It shall start with describing the existing underground facilities. It shall be discussed the basic concepts of neutrino mixing and neutrino oscillations and summarise the present experimental evidence. This evidence comes mainly from experiments, in underground laboratories, on neutrinos from the Sun (solar neutrinos) and neutrinos indirectly produced by cosmic rays in the atmosphere (atmospheric neutrinos). Further important pieces of information are due to experiments on electron antineutrinos from reactors (CHOOZ) and on muon neutrinos from an accelerator (K2K). Then it shall be discussed the concept of neutrino masses and how different experiments (single-and double-beta decay, Supernova neutrinos, Cosmology) measure different combinations of the three mass eigenvalues. This issue is directly connected with the unknown nature of neutrinos: Dirac or Majorana particles? In the following sections shall be reviewed the contributions given by the Gran Sasso Laboratory and discussed the possible research program for the next years
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Journal Article
Journal
Rivista del Nuovo Cimento della Societa Italiana di Fisica; ISSN 0393-697X;
; CODEN RNUCAC; v. 24S4(11); p. 1-59

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AbstractAbstract
[en] It is argued that the observed deficit of solar and atmospheric neutrinos can be explained by neutrino oscillations νe → νs and νμ → ν's involving two hypothetic sterile neutrinos νs and ν's (blind to all Standard-Model interactions). They are keen to mix nearly maximally with νe and νμ, respectively, to form neutrino mass states νl, ν4 and ν2, ν5. Our argument is presented in the framework of a model of fermion ''texture'' formulated previously, which implies the existence of two sterile neutrinos beside the three conventional. (author)
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10 refs
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Journal Article
Journal
Acta Physica Polonica. Series B; ISSN 0587-4254;
; v. 30(2); p. 227-245

Country of publication
ELEMENTARY PARTICLES, FERMIONS, FIELD THEORIES, GRAND UNIFIED THEORY, HEAVY LEPTONS, INTERACTIONS, LEPTON-LEPTON INTERACTIONS, LEPTONS, MASSLESS PARTICLES, MATHEMATICAL MODELS, NEUTRINOS, PARTICLE INTERACTIONS, PARTICLE MODELS, QUANTUM FIELD THEORY, RADIATIONS, SOLAR PARTICLES, SOLAR RADIATION, STELLAR RADIATION, UNIFIED GAUGE MODELS
Reference NumberReference Number
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Petyt, D.A.
Oxford Univ. (United Kingdom)1998
Oxford Univ. (United Kingdom)1998
AbstractAbstract
[en] This thesis presents a study of the capability of the proposed MINOS long-baseline neutrino experiment to measure the neutrino mixing parameters, if oscillations are assumed to occur with the parameters suggested by the results of atmospheric neutrino experiments. It is shown that the observation of a neutrino energy dependent suppression of νμ events in MINOS could provide a measurement of the mixing parameters to greater than 10% accuracy for 0.005 < Δm2 < 0.2 eV2 if sin2 2θ ≥ 0.7. The performance of a putative low energy beam for MINOS has been studied and it is shown that this beam could allow neutrino oscillations to be observed in MINOS above Δm2 = 0.002 eV2 . An independent and complementary method to measure the mixing parameters by using the energy distributions of νe CC events is also presented. A test has been developed that is sensitive to νμ → ντ oscillations in MINOS by searching for event topologies that are characteristic of tau leptons. The sensitivity of the test to neutrino oscillations has been evaluated for a variety of possible detector configurations of the MINOS far detector. A fine grained detector (2 cm steel plates and 2 cm transverse pitch) is shown to provide the greatest sensitivity; a limit of sin2 2θ < 0.2 could be set at 90% confidence at large Δm2 for a 20 kiloton year exposure of MINOS. A five standard deviation effect or greater could be observed if νμ → ντ oscillations occur with sin2 2θ = 1 and Δm2 ≥ 10-2 eV2. The prospects of analysing MINOS data in the framework of three-flavour neutrino oscillations have been assessed and a preliminary Monte Carlo analysis in three-generations is presented. The results of the CHOOZ reactor neutrino experiment and the solar neutrino experiments are shown to rule out the possibility of observing a large CP violating amplitude in MINOS. Finally it is shown how the future results of MINOS are complementary to other searches for neutrino oscillations. (author)
Primary Subject
Source
1998; 212 p; Available from British Library Document Supply Centre- DSC:D201432; Thesis (Ph.D.)
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Miscellaneous
Literature Type
Thesis/Dissertation
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Hollnagel, Annika
OPERA-Hamburg-Collaboration2012
OPERA-Hamburg-Collaboration2012
AbstractAbstract
[en] The primary goal of the OPERA long-baseline neutrino oscillation experiment is the first direct detection of νμ →ντ oscillations. The hybrid OPERA detector consists of a target made from lead and photo emulsions, providing micrometric resolution, and electronic detector parts for on-line readout. It is located in the LNGS underground laboratory, at a baseline of 730 km from the SPS at CERN, where the νμ CNGS beam is produced. The measurement of ντ appearance relies on the detection of the decay of τ leptons which are created in ντ charged current reactions. Data acquisition started in 2008, and numerous beam-induced events have been recorded, including the observation of a first ντ candidate event in 2009. In this talk, the current status of the oscillation analysis is presented.
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2012 DPG Spring meeting with the divisions of gravitation and theory of relativity, particle physics, theoretical and mathematical fundamentals of the physics; DPG-Fruehjahrstagung 2012 der Fachverbaende Gravitation und Relativitaetstheorie, Teilchenphysik, Theoretische und Mathematische Grundlagen der Physik; Goettingen (Germany); 27 Feb - 2 Mar 2012; Available on-line: http://www.dpg-verhandlungen.de; Session: T 31.1 Fr 09:20; No further information available; Also available as printed version: Verhandlungen der Deutschen Physikalischen Gesellschaft v. 47(1)
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Journal Article
Literature Type
Conference
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195;
; CODEN VDPEAZ; (Goettingen 2012 issue); [1 p.]

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External URLExternal URL
AbstractAbstract
[en] Neutrinos play an exceptional role as well in particle or nuclear physics as in astrophysics. The purpose of the conference is to cover the main steps of their history since the brilliant and inspired idea of Pauli in December 1930. Trying to cover all the facets of this fascinating particles, the presentations are parted into 5 topics: -) invention of a new particle, -) natural neutrinos and interdisciplinary aspects, -) man-made sources of neutrinos, -) quantum mechanics at work: oscillations and particle physics, -) neutrinos and fundamental particle physics, and -) neutrinos as messengers of the universe. The objective is, for each topic, to have a historian/historical approach and follow as close as possible the original papers in correlation with the scientific and historical context. This document is composed of the slides of the presentations and of a few posters
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2018; 1481 p; International conference on the history of the neutrino; Paris (France); 5-7 Sep 2018; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses
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Miscellaneous
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Conference
Report Number
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ANTILEPTONS, ANTIMATTER, ANTIPARTICLES, BETA DECAY, BETA-MINUS DECAY, COSMIC RADIATION, DECAY, DETECTION, ELEMENTARY PARTICLES, FERMIONS, HEAVY LEPTONS, IONIZING RADIATIONS, LEPTONS, MASSLESS PARTICLES, MATTER, MEASURING INSTRUMENTS, NEUTRINOS, NUCLEAR DECAY, RADIATION DETECTION, RADIATION DETECTORS, RADIATIONS, SOLAR PARTICLES, SOLAR RADIATION, STELLAR RADIATION
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AbstractAbstract
[en] The possible outcomes of neutrino events at both Super-Kamiokande and SNO for a type-II supernova are analyzed considering the uncertainties in supernova neutrino spectra (temperature) at emission, which may complicate the interpretation of the observed events. With the input of parameters deduced from the current solar and atmospheric experiments, the consequences of direct-mass hierarchy mντ>>mνμ>mνe and inverted-mass hierarchy mνe>mνμ>>mντ are investigated. Even if the ν temperatures are not precisely known, we find that future experiments are likely to be able to separate the currently accepted solutions to the solar neutrino problem, large-angle Mikheyev-Smirnov-Wolfenstein (MSW), small-angle MSW, and the vacuum oscillation, as well as to distinguish between the direct and inverted mass hierarchies of the neutrinos. (c) 2000 The American Physical Society
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Journal Article
Literature Type
Numerical Data
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BINARY STARS, COSMIC RADIATION, DATA, DETECTION, ELEMENTARY PARTICLES, ERUPTIVE VARIABLE STARS, FERMIONS, HEAVY LEPTONS, INFORMATION, IONIZING RADIATIONS, LEPTONS, MASSLESS PARTICLES, NEUTRINOS, NUMERICAL DATA, RADIATION DETECTION, RADIATIONS, SOLAR PARTICLES, SOLAR RADIATION, STARS, STELLAR RADIATION, VARIABLE STARS
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AbstractAbstract
[en] Limits on νμ→νe and νμ→νe oscillations are extracted using the NuTeV detector with sign-selected νμ and νμ beams. In νμ mode, for the case of sin22α=1 , Δm2>2.6 eV 2 is excluded, and for Δm2>>1000 eV2 , sin22α>1.1x10-3 . The NuTeV data exclude the high Δm2 end of νμ→νe oscillation parameters favored by the LSND experiment without the need to assume that the oscillation parameters for ν and ν are the same. We present the most stringent experimental limits for νμ(νμ)→νe(νe) oscillations in the large Δm2 region
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Source
(c) 2002 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Lagage, P.O.
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Inst. de Recherche Fondamentale (IRF)1985
CEA Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France). Inst. de Recherche Fondamentale (IRF)1985
AbstractAbstract
[en] Supernova (SN) explosions are the place of very fundamental phenomena, whose privileged messengers are neutrinos. But such events are very rare. Then, SN detection has to be combined with other purposes. The recent developments of SN detectors have been associated with developments of underground particle physics (proton decay, monopoles ...). But here, I will restrict myself to discuss the possibilities for a supernova detector to be sensitive to other sources of neutrinos, astrophysical or terrestrial
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Secondary Subject
Source
Sep 1985; 18 p; National congress of the Societe Francaise de Physique; Nice (France); 9-13 Sep 1985
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Report
Literature Type
Conference
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Country of publication
ANTILEPTONS, ANTIMATTER, ANTIPARTICLES, BINARY STARS, COSMIC RADIATION, DETECTION, ELEMENTARY PARTICLES, ERUPTIVE VARIABLE STARS, FERMIONS, IONIZING RADIATIONS, LEPTONS, MASSLESS PARTICLES, MATTER, NEUTRINOS, RADIATION DETECTION, RADIATIONS, SOLAR PARTICLES, SOLAR RADIATION, STARS, STELLAR RADIATION, VARIABLE STARS
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AbstractAbstract
[en] Neutrino oscillation experiments (νμ → νe and νμ → → ντ) currently being performed at accelerators are reviewed. Future plans for short and long base-line experiments are summarized. (author)
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Source
Stolarcyk, T. (CEA Saclay, 91 - Gif-sur-Yvette (France). Dept. d'Astrophysique, de la Physique des Particules, de la Physique Nucleaire et de l'Instrumentation Associee); Tran Thanh Van, J. (Paris-11 Univ., 91 - Orsay (France). Lab. de Physique Theorique et Hautes Energies); Vannucci, F. (Paris-6 Univ., 75 (France). Lab. de Physique Nucleaire et de Hautes Energies; Paris-7 Univ., 75 (France). Lab. de Physique Experimentale des Hautes Energies); 414 p; ISBN 2-86332-209-5;
; 1996; p. 51-66; 8. 'Neutrinos, dark matter and the universe'; Blois (France); 8-12 Jun 1996; 35 refs.

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Book
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Godley, A.R.
17th AINSE nuclear particle physics conference held in association with the 13th Australian Institute of Physics conference1998
17th AINSE nuclear particle physics conference held in association with the 13th Australian Institute of Physics conference1998
AbstractAbstract
[en] Full text: Neutrino oscillations, the changing of neutrino flavour state from one of τ, μ or e, to another, are proof of massive neutrinos, in turn pointing to Physics beyond the Standard Model, and so are of great current interest. Solar and atmospheric neutrino results suggested evidence for neutrino oscillations. Further, a tau neutrino mass of ∼ 10 eV could supply the missing mass needed to close the Universe. To satisfy the increasing interest, CERN's Neutrino Physics Program commissioned two concurrent experiments to investigate the possibility of neutrino oscillations, one of which is NOMAD, Neutrino Oscillation Magnetic Detector. NOMAD was designed to verify or deny the earlier positive neutrino oscillations results by searching for muon to tauon neutrino oscillations in accelerator neutrinos. The LSND experiment later provided evidence for muon to electron neutrino oscillations, but due to the multi-purpose design of NOMAD, it was also possible to investigate this channel. Moreover, the area of phase space being uncovered, (related to neutrino energy and oscillation length), overlaps considerably with that of LSND. An electron neutrino oscillation search involves looking for electron neutrinos in what is primarily a muon neutrino beam, with just a small contamination of electron neutrinos. It is surmised that the excess of electron neutrinos come from oscillated muon neutrinos. This type of search is called an appearance search. The principles of such a search will be detailed herein. These include a breakdown of the CERN Neutrino Beam and a method for detecting and collating different neutrino flavours at NOMAD
Primary Subject
Source
Australian Institute of Nuclear Science and Engineering, Lucas Heights, NSW (Australia); 38 p; 1998; p. 8; 17. AINSE nuclear particle physics conference; Fremantle, WA (Australia); 28 Sep - 1 Oct 1998; 13. Australian Institute of Physics conference; Fremantle, WA (Australia); 28 Sep - 1 Oct 1998
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Miscellaneous
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