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Oscillation Analysis Of Atmospheric Neutrinos In Soudan 2
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Book Synopsis Oscillation Analysis of Atmospheric Neutrinos in Soudan 2 by : Mayly Sanchez
Download or read book Oscillation Analysis of Atmospheric Neutrinos in Soudan 2 written by Mayly Sanchez and published by . This book was released on 2003 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discovery of neutrino oscillations, and hence neutrino mass, in both solar and atmospheric neutrinos has been one of the major recent advances in particle physics. Among the many experiments that contributed to the study of this phenomenon. Super-Kamiokande is regarded as the experiment having established neutrino oscillations using atmospheric neutrinos. The final data sample of 5.90 kiloton-year exposure collected by the Soudan 2 detector is studied for the effects of atmospheric neutrino oscillations. These data are analyzed with a maximum likelihood analysis of the neutrino L/ E distribution using the Feldman-Cousins approach. The result confirms the discovery of oscillations in atmospheric neutrinos.
Book Synopsis Observation of Atmospheric Neutrino Oscillations in Soudan 2 by :
Download or read book Observation of Atmospheric Neutrino Oscillations in Soudan 2 written by and published by . This book was released on 2003 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of oscillations of atmospheric [nu]{sub {mu}} are observed in the 5.90 fiducial kiloton-year exposure of the Soudan 2 detector. An unbinned maximum likelihood analysis of the neutrino L/E distribution has been carried out using the Feldman-Cousins prescription. The probability of the no oscillation hypothesis is 5.8 x 10−4. The 90% confidence allowed region in the sin2 2[theta], [Delta]m2 plane is presented.
Book Synopsis Neutrino Oscillation Searches with the Soudan 2 Detector by : Hugh Michael Gallagher
Download or read book Neutrino Oscillation Searches with the Soudan 2 Detector written by Hugh Michael Gallagher and published by . This book was released on 1996 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Atmospheric Neutrinos in Soudan 2 by :
Download or read book Atmospheric Neutrinos in Soudan 2 written by and published by . This book was released on 1999 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The value and zenith angle dependence of the atmospheric neutrino flavor ratio is interpreted as evidence for neutrino oscillations. The latest values from the Soudan 2 detector are presented. From 4.2 kt-years fiducial exposure, Soudan 2 measures R = 0.66 " 0.11(stat) + 0.05--0.06(syst). Using a subset of the data with the best angular resolution, they plot the L/E distribution and use this to find the allowed region in oscillation parameter space. Their fit suggests that delta m-squared is greater than 10−3 eV2 at 90% CL.
Book Synopsis Search for Atmospheric Neutrino Oscillations with the Soudan 2 Detector by :
Download or read book Search for Atmospheric Neutrino Oscillations with the Soudan 2 Detector written by and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underground proton decay detectors record a sizeable number of atmospheric neutrino-induced events. These neutrinos come primarily from the decay of pions and muons produced in cosmic ray showers in the earth's atmosphere. The expected flux ratio of muon neutrinos to electron neutrinos traversing an underground detector,??/?{sub e}, is about 2. The combined effects of detector systematics and nuclear cross section differences between?{sub mu} and?{sub e} interactions typically reduce the measured?{sub mu}/?3 event ratio to about 1. Over the last decade, both the Kamioka detector in Japan and the IMB detector in the United States have made high-statistics measurements of the atmospheric neutrino event ratio. Both groups have presented strong experimental evidence that the underground?{sub mu}/?{sub e} event ratio is substantially smaller than predicted. In both cases, a statistically significant deficit of muon neutrino-induced events is measured. One possible explanation of the muon neutrino deficit is that these neutrinos are undergoing flavor oscillations between their production points in the atmosphere and their interaction points in underground detectors. An MSW effect interpretation of solar neutrino experiments implies a?{sub e} →?{sub mu} oscillation region in?m2-sin2(2?) space at least two orders of magnitude lower in?m2 than the best fit point of the Kamioka result. It is therefore usually assumed that the relevant flavor oscillation for atmospheric muon neutrinos would be?{sub mu} →?{sub r}. The Soudan 2 nucleon decay detector is now approaching completion and collecting data. It will be able to make low-background measurements of atmospheric neutrinos in the next few years to check the possibility that atmospheric neutrinos undergo detectable flavor oscillations.
Book Synopsis Search for Atmospheric Neutrino Oscillations with the Soudan 2 Detector by :
Download or read book Search for Atmospheric Neutrino Oscillations with the Soudan 2 Detector written by and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Neutron Oscillation and Study of Neutrino Reaction Rates Using Multiprong Events in Soudan 2 by : Jin-Hyuk Chung
Download or read book Search for Neutron Oscillation and Study of Neutrino Reaction Rates Using Multiprong Events in Soudan 2 written by Jin-Hyuk Chung and published by . This book was released on 2001 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the second part of this dissertation, a study of atmospheric neutrino reaction rates using multiprong events is presented. Based on kinematic and topological properties of 177 multiprong data events, an algorithm was devised to match a set of Monte Carlo events to each data event. The algorithm requires that for each Monte Carlo event selected, the total visible energy and the net event momentum are nearly equal to the corresponding values for the data event, and that the flavor tags and prong counts are compatible. In order to take into account numu → nutau oscillation observed previously in atmospheric neutrino detectors (Super-Kamiokande, Soudan 2 and MACRO), each Monte Carlo event is weighted with neutrino oscillation probability corresponding to Deltam2 = 3 x 10-3 eV2 and sin 2theta = 1. From analysis of the matched Monte Carlo events, we conclude that 39.7 +/- 3.1% of multiprong data events in Soudan 2 have nu mu flavor.
Book Synopsis Atmospheric Neutrinos in the MINOS Far Detector by : Caius Leo Frederick Howcroft
Download or read book Atmospheric Neutrinos in the MINOS Far Detector written by Caius Leo Frederick Howcroft and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutrino Oscillations And Their Origin, Proceedings Of The Third International Workshop by : Yoshiyuki Fukuda
Download or read book Neutrino Oscillations And Their Origin, Proceedings Of The Third International Workshop written by Yoshiyuki Fukuda and published by World Scientific. This book was released on 2002-12-30 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents:Solar Neutrinos:The Latest Solar Neutrino Results in Super-Kamiokande (Y Koshio)Weak Current in Deuterium (T Sato)Solar Neutrino Phenomenology and Future:Solar Neutrino Oscillations (M C Gonzalez-Garcia)The Status of Resonant Spin Flavor Precession (C S Lim)Atmospheric Neutrinos:Status of the Atmospheric Neutrino Studies (M D Messier)Cosmic Ray Measurements for Atmospheric Neutrino with BESS-TeV (K Abe)Oscillation Phenomenology I:Calculations of the Atmospheric ν Fluxes (P Lipari)Three-Flavor Analysis of Atmospheric and Solar Neutrinos (A Marrone)Absolute Neutrino Mass:Neutrinoless Double Beta Decay and Neutrino Oscillations (H V Klapdor-Kleingrothaus)Accelerator Neutrinos, CPV:The MINOS Experiment (M D Messier)The JHF-Kamioka Neutrino Project (T Kajita)Models and GUTs:Proton Decay in the Semi-Simple Unification Model (T Watari)Leptogenesis via LHu Flat Direction (M Fujii)Lepton Flavor Violation:Probing Physics Beyond the Standard Model from Lepton Sector (J Hisano)Oscillation Phenomenology II:Four Puzzles of Neutrino Mixing (S M Barr)Supernova Neutrinos:Supernova Neutrinos (J F Beacom)and other papers Readership: Researchers in high energy physics. Keywords:Solar Neutrinos;Atmospheric Neutrinos;Oscillation Phenomenology;Neutrino Mass;Accelerator Neutrinos;CP Violation;GUTs;Lepton Flavor Violation;Supernova Neutrinos
Book Synopsis Study of Atmospheric Neutrino Interactions and Search for Nucleon Decay in Soudan 2 by :
Download or read book Study of Atmospheric Neutrino Interactions and Search for Nucleon Decay in Soudan 2 written by and published by . This book was released on 1995 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contained event samples, including 30 single-track muon-like events, 35 single-shower electron-like events, and 34 multiprong events, have been obtained from a 1.0 kiloton-year exposure of the Soudan 2 detector. A sample of 15 multiprong events which are partially contained has also been isolated. Properties of these events are used to examine the verity of the atmospheric neutrino flavor ratio anomaly as reported by the Kamiokande and IMB-3 water Cherenkov experiments. The compatibility of the Soudan data with each of two `new physics` explanations for the anomaly, namely proton decay and neutrino oscillations, is investigated. We examine background processes which have not been explicitly treated by the water Cherenkov detectors. Chapters discuss underground non-accelerator particle physics, the atmospheric neutrino anomaly and its interpretation, the Soudan 2 detector and event selection, reconstruction of neutrino events, rock event contamination in Soudan `quasi-elastic` samples, contained multiprong events in Soudan 2, neutrino flavor composition of the multiprong sample, partially contained events in Soudan 2, nucleon decay in Soudan 2, and a summary and discussion. 12 refs., 124 figs., 28 tabs., 7 appendices.
Book Synopsis Neutrino Oscillations by : Jennifer A. Thomas
Download or read book Neutrino Oscillations written by Jennifer A. Thomas and published by World Scientific. This book was released on 2008 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the status of a very exciting field OCo neutrino oscillations OCo at a very important time. The fact that neutrinos have mass has only been proved in the last few years and the acceptance of that fact has opened up a whole new area of study to understand the fundamental parameters of the mixing matrix. The book summarizes the results from all the experiments which have played a role in the measurement of neutrino oscillations and briefly describes the scope of some new planned experiments. Contributions include a theoretical introduction by Stephen Parke from FNAL, as well as articles from all the major experimental groups who have been pivotal in uncovering the nature of the neutrino mass. Sample Chapter(s). Chapter 1: Neutrino Oscillation Phenomenology (677 KB). Contents: Neutrino Oscillation Phenomenology (S J Parke); The Super-Kamiokande Experiment (C W Walter); Sudbury Neutrino Observatory (S J M Peeters & J R Wilson); Neutrino Oscillation Physics with KamLAND: Reactor Antineutrinos and Beyond (K M Heeger); K2K: KEK to Kamioka Long-Baseline Neutrino Oscillation Experiment (R J Wilkes); MINOS (P Vahle); The LSND and KARMEN Neutrino Oscillation Experiments (W C Louis); MiniBooNE (S J Brice); The OPERA Experiment in the CNGS Beam (D Autiero et al.); The T2K Experiment (D L Wark); The NO?A Experiment (G J Feldman); Double Chooz (G A Horton-Smith & T Lasserre); Daya Bay: A Sensitive Determination of ? 13 with Reactor Antineutrinos (K B Luk & Y Wang). Readership: Physicists, researchers and graduate students in high energy/nuclear and particle physics."
Book Synopsis A Study of Atmospheric Neutrino Oscillations in the MINOS Far Detector by : A. Blake
Download or read book A Study of Atmospheric Neutrino Oscillations in the MINOS Far Detector written by A. Blake and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of the Atmospheric Neutrino Flavor Ration with the Soudan 2 Detector by : Donald Michael Roback
Download or read book Measurement of the Atmospheric Neutrino Flavor Ration with the Soudan 2 Detector written by Donald Michael Roback and published by . This book was released on 1992 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies of Non-standard Effects in Atmospheric Neutrino Oscillations of Super-Kamiokande by : Wei Wang
Download or read book Studies of Non-standard Effects in Atmospheric Neutrino Oscillations of Super-Kamiokande written by Wei Wang and published by . This book was released on 2007 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The third category of non-standard theory involves vanishing neutrinos caused by neutrino decoherence and neutrino decay. Our study shows that it is unlikely to explain SK atmospheric neutrino zenith angle distributions using these two non-oscillatory models. By treating them as sub-dominant effects, limits on these two types of new physics are set based on several specific models.
Book Synopsis Precise Study of the Atmospheric Neutrino Oscillation Pattern Using Super-Kamiokande I and II by : Fanny Maude Dufour
Download or read book Precise Study of the Atmospheric Neutrino Oscillation Pattern Using Super-Kamiokande I and II written by Fanny Maude Dufour and published by . This book was released on 2009 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Neutrino Oscillation Models with Super-Kamiokande Atmospheric Neutrino Data by : Michael R. Dziomba
Download or read book A Study of Neutrino Oscillation Models with Super-Kamiokande Atmospheric Neutrino Data written by Michael R. Dziomba and published by . This book was released on 2012 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapidly evolving field of neutrino oscillations continues to offer exciting experimental results as it enters the era of precision measurements. The mixing angles and mass-squared splittings governing neutrino oscillations have all been measured experimentally and only one parameter, the CP-violating phase [delta], remains unmeasured. Both atmospheric and long-baseline accelerator experiments are sensitive to the parameters [theta]23 and [Delta] m223. In particular the wide range of neutrino pathlengths and energies accessible to the Super-Kamiokande (SK) detector with atmospheric neutrinos offer a unique opportunity to measure these parameters with high-statistics data. SK is also suitable for constraining exotic oscillation models which include sterile neutrinos and non-standard matter interactions, due to the large variations in density through which atmospheric neutrinos can traverse. In this thesis we use an expanded atmospheric neutrino dataset combined with improved Monte Carlo simulations to update the SK 2-flavor muon neutrino disappearance zenith angle analysis. We measure values of [Delta] m223 = 2.30 +̳0̳̳.̳1̳7̳ -̳0̳.̳̳2̳2̳ x 10−3 eV2 and sin2 2 [theta] 23> 0.95 (90% C.L.), in excellent agreement with recent worldwide results. We also fit the SK data to a recent exotic model which incorporates both sterile-active mixing and a new non-standard interaction in matter. We find that SK rules out most of the model's parameter space and restricts it to the region where standard 2-flavor mixing is recovered.
Book Synopsis The Atmospheric Neutrino Anomaly in Soudan 2 by :
Download or read book The Atmospheric Neutrino Anomaly in Soudan 2 written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
