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Download or read book Observation of Electron Antineutrino Disappearance by the Daya Bay Reactor Neutrino Experiment written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Total Pages : 0 pages
Book Rating : 4.:/5 (81 download)
Download or read book Observation of Antineutrino Disappearance at the Daya Bay Experiment written by and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many experiments in the last few decades have demonstrated the neutrino's ability to change flavor while traveling through space and time, or oscillate. One of the last remaining unknown parameters describing this oscillation, theta13, is crucial in defining the magnitude of CP-violation in the lepton sector and in examining the neutrino's role in the universe's matter-antimatter asymmetry. The Daya Bay experiment has measured theta13 with unprecedented precision by observing disappearance of reactor antineutrinos with identical detectors at multiple distances. This thesis will introduce the Daya Bay experiment, describe the design, construction, characterization, and calibration of its functionally identical antineutrino detectors, and present an independent relative rate analysis of the first Daya Bay data. With roughly two months of data, this analysis has conclusively measured this mixing parameter, excluding the theta13=0 hypothesis to five standard deviations. Proper understanding of this measurement's detector systematics are demonstrated with a side-by-side comparison of near-site detector data, which shows identical antineutrino detection rates between detectors. The implications of this non-zero theta13 measurement are discussed, as well as possible further contributions of the Daya Bay experiment to neutrino physics knowledge.
Download or read book New Measurement of Antineutrino Oscillation with the Full Detector Configuration at Daya Bay written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a new measurement of electron antineutrino disappearance using the fully constructed Daya Bay Reactor Neutrino Experiment. The final two of eight antineutrino detectors were installed in the summer of 2012. Including the 404 days of data collected from October 2012 to November 2013 resulted in a total exposure of 6.9×105 GWth ton days, a 3.6 times increase over our previous results. Improvements in energy calibration limited variations between detectors to 0.2%. Removal of six 241Am- 13C radioactive calibration sources reduced the background by a factor of 2 for the detectors in the experimental hall furthest from the reactors. Direct prediction of the antineutrino signal in the far detectors based on the measurements in the near detectors explicitly minimized the dependence of the measurement on models of reactor antineutrino emission. The uncertainties in our estimates of 2sin2[theta]13 and.
Author : Kei Ieki
Publisher : Springer
ISBN 13 : 4431558373
Total Pages : 205 pages
Book Rating : 4.4/5 (315 download)
Download or read book Observation of ν_μ→ν_e Oscillation in the T2K Experiment written by Kei Ieki and published by Springer. This book was released on 2015-12-24 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis the author contributes to the analysis of neutrino beam data collected between 2010 and 2013 to identify νμ→νe events at the Super-Kamiokande detector. In particular, the author improves the pion–nucleus interaction uncertainty, which is one of the dominant systematic error sources in T2K neutrino oscillation measurement. In the thesis, the measurement of νμ→νe oscillation in the T2K (Tokai to Kamioka) experiment is presented and a new constraint on δCP is obtained. This measurement and the analysis establish, at greater than 5σ significance, the observation of νμ→νe oscillation for the first time in the world. Combining the T2K νμ→νe oscillation measurement with the latest findings on oscillation parameters including the world average value of θ13 from reactor experiments, the constraint on the value of δCP at the 90% confidence level is obtained. This constraint on δCP is an important step towards the discovery of CP violation in the lepton sector.
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Download or read book Observation of Antineutrino Oscillations from Spectral Distortions at the Daya Bay Reactor Neutrino Experiment written by and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutrino oscillation is the quantum mechanical phenomenon whereby neutrinos or antineutrinos can spontaneously transform from one of three flavors0́4 electron, muon, or tau0́4 to another. The Daya Bay Reactor Neutrino Experiment has measured neutrino mixing angle Ø13, for the first time, to world-leading precision. The analysis in this dissertation reports sin22Ø13 = 0.088 0.0088, m232 = 2.54+0:172:54+0:17-0.18 *108́ eV2 and m231 = 2.62 108́23 eV2, assuming m221 = 7.50*108-5 eV2 and normal hierarchy. These measurements were accomplished by the early deployment of six functionally identical detectors to observe antineutrino flux from six nuclear reactors, between 2 to 12 MeV. Half the detectors are sited near the position of maximal oscillation, about 1600m from the reactors, while the rest are located 500m and 550m away at two sites, where the oscillation probability is low. The relative comparison of antineutrino rates and energies at identical near and far detectors provides a direct measurement of Ø13 and m2, while greatly reducing systematic uncertainties. The chapters that follow explain neutrino oscillations, and experiment strategy and construction. My contributions to the experiment are highlighted in more detail in the introductions to chapters 3 through 9. These include a detector camera monitoring system, a sensitivity calculation that helped motivate the early six-detector analysis, and the measurements of oscillation parameters from antineutrino rates and spectra.
Download or read book First Direct Observation of Muon Antineutrino Disappearance written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This letter reports the first direct observation of muon antineutrino disappearance. The MINOS experiment has taken data with an accelerator beam optimized for ????????? production, accumulating an exposure of 1.71 x 1020 protons on target. In the Far Detector, 97 charged current ????????? events are observed. The no-oscillation hypothesis predicts 156 events and is excluded at 6.3?. The best fit to oscillation yields.
Author : Joseph Grange
Publisher : Springer
ISBN 13 : 3319095730
Total Pages : 185 pages
Book Rating : 4.3/5 (19 download)
Download or read book First Measurement of the Muon Anti-Neutrino Charged Current Quasielastic Double-Differential Cross Section written by Joseph Grange and published by Springer. This book was released on 2014-09-23 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a major step forward in experimentally understanding the behavior of muon neutrinos and antineutrinos. Apart from providing the world’s first measurement of these interactions in a mostly unexplored energy region, the data presented advances the neutrino community’s preparedness to search for an asymmetry between matter and anti-matter that may very well provide the physical mechanism for the existence of our universe. The details of these measurements are preceded by brief summaries of the history of the neutrino, the phenomenon of neutrino oscillations, and a description of their interactions. Also provided are details of the experimental setup for the measurements and the muon antineutrino cross-section measurement which motivates the need for dedicated in situ background constraints. The world’s first measurement of the neutrino component of an antineutrino beam using a non-magnetized detector, as well as other crucial background constraints, are also presented in the book. By exploiting correlated systematic uncertainties, combined measurements of the muon neutrino and antineutrino cross sections described in the book maximize the precision of the extracted information from both results.
Author : Antonio Ereditato
Publisher : World Scientific
ISBN 13 : 9813226102
Total Pages : 580 pages
Book Rating : 4.8/5 (132 download)
Download or read book State Of The Art Of Neutrino Physics, The: A Tutorial For Graduate Students And Young Researchers written by Antonio Ereditato and published by World Scientific. This book was released on 2018-03-23 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: The neutrino is the most fascinating elementary particle due to its elusive nature and outstanding properties that have attracted the interest of generations of physicists since 1930, when it was first postulated by Wolfgang Pauli as a 'desperate remedy' to explain the apparent energy violation in the beta decay. Many fundamental discoveries in particle physics had the neutrino involved in one way or another. To date, neutrino physics is still one of the hottest topics of modern particle physics. Key experiments and significant theoretical developments have contributed in building up what we can call now the Standard Model of Neutrino Physics.The aim of the book is to provide graduate students and young researchers a comprehensive tutorial in modern neutrino physics, specially tailored with emphasis on the educational aspects. It provides an overview of the basics and of recent achievements in the field, from both experimental and theoretical points of view.
Author : Kai Schmitz
Publisher : Springer Science & Business Media
ISBN 13 : 331900963X
Total Pages : 225 pages
Book Rating : 4.3/5 (19 download)
Download or read book The B−L Phase Transition written by Kai Schmitz and published by Springer Science & Business Media. This book was released on 2013-10-30 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several of the very foundations of the cosmological standard model — the baryon asymmetry of the universe, dark matter, and the origin of the hot big bang itself — still call for an explanation from the perspective of fundamental physics. This work advocates one intriguing possibility for a consistent cosmology that fills in the theoretical gaps while being fully in accordance with the observational data. At very high energies, the universe might have been in a false vacuum state that preserved B-L, the difference between the baryon number B and the lepton number L as a local symmetry. In this state, the universe experienced a stage of hybrid inflation that only ended when the false vacuum became unstable and decayed, in the course of a waterfall transition, into a phase with spontaneously broken B-L symmetry. This B-L Phase Transition was accompanied by tachyonic preheating that transferred almost the entire energy of the false vacuum into a gas of B-L Higgs bosons, which in turn decayed into heavy Majorana neutrinos. Eventually, these neutrinos decayed into massless radiation, thereby producing the entropy of the hot big bang, generating the baryon asymmetry of the universe via the leptogenesis mechanism and setting the stage for the production of dark matter. Next to a variety of conceptual novelties and phenomenological predictions, the main achievement of the thesis is hence the fascinating notion that the leading role in the first act of our universe might have actually been played by neutrinos.
Author : Samoil Bilenky
Publisher : Springer
ISBN 13 : 3319748025
Total Pages : 283 pages
Book Rating : 4.3/5 (197 download)
Download or read book Introduction to the Physics of Massive and Mixed Neutrinos written by Samoil Bilenky and published by Springer. This book was released on 2018-04-02 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small neutrino masses are the first signs of new physics beyond the Standard Model of particle physics. Since the first edition of this textbook appeared in 2010, the Nobel Prize has been awarded "for the discovery of neutrino oscillations, which shows that neutrinos have mass". The measurement of the small neutrino mixing angle $\theta_{13}$ in 2012, launched the precision stage of the investigation of neutrino oscillations. This measurement now allows such fundamental problems as the three-neutrino mass spectrum - is it normal or inverted? – and the $CP$ violation in the lepton sector to be tackled. In order to understand the origin of small neutrino masses, it remains crucial to reveal the nature of neutrinos with definite masses: are they Dirac neutrinos possessing a conserved lepton number, which distinguishes neutrinos and antineutrinos, or are they Majorana neutrinos with identical neutrinos and antineutrinos? Experiments searching for the neutrinoless double beta decay are presently under way to answer this fundamental question. The second edition of this book comprehensively discusses all these important recent developments. Based on numerous lectures given by the author, a pioneer of modern neutrino physics (recipient of the Bruno Pontecorvo Prize 2002), at different institutions and schools, it offers a gentle yet detailed introduction to the physics of massive and mixed neutrinos that prepares graduate students and young researchers entering the field for the exciting years ahead in neutrino physics.
Author : Wang Wei
Publisher : World Scientific
ISBN 13 : 9811207410
Total Pages : 576 pages
Book Rating : 4.8/5 (112 download)
Download or read book Lepton Photon Interactions At High Energies (Lepton Photon 2017) - Proceedings Of The 28th International Symposium written by Wang Wei and published by World Scientific. This book was released on 2020-02-27 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest of the 'Lepton Photon' symposium, one of the well-established series of meetings in the high-energy physics community, was successfully organized at the South Campus of Sun Yat-sen University, Guangzhou, China, from August 7-12, 2017, where physicists around the world gathered to discuss the latest advancements in the research field.This proceedings volume of the Lepton Photon 2017 collects contributions by the plenary session speakers and the posters' presenters, which cover the latest results in particle physics, nuclear physics, astrophysics, cosmology, and plans for future facilities.
Author : Cheryl E. Patrick
Publisher : Springer
ISBN 13 : 3319690876
Total Pages : 352 pages
Book Rating : 4.3/5 (196 download)
Download or read book Measurement of the Antineutrino Double-Differential Charged-Current Quasi-Elastic Scattering Cross Section at MINERvA written by Cheryl E. Patrick and published by Springer. This book was released on 2017-11-15 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis represents the first double differential measurement of quasi-elastic anti-neutrino scattering in the few GeV range--a region of substantial theoretical and experimental interest as it is the kinematic region where studies of charge-parity (CP) violation in the neutrino sector most require precise understanding of the differences between anti-neutrino and neutrino scatter. This dissertation also presents total antineutrino-scintillator quasi-elastic cross sections as a function of energy, which is then compared to measurements from previous experiments. Next-generation neutrino oscillation experiments, such as DUNE and Hyper-Kamiokande, hope to measure CP violation in the lepton sector. In order to do this, they must dramatically reduce their current levels of uncertainty, particularly those due to neutrino-nucleus interaction models. As CP violation is a measure of the difference between the oscillation properties of neutrinos and antineutrinos, data about how the less-studied antineutrinos interact is especially valuable. The measurement described herewith determines the nuclear and instrumental effects that must be understood to undertake precision neutrino physics. As well as being useful to help reduce oscillation experiments' uncertainty, this data can also be used to study the prevalence of various correlation and final-state interaction effects within the nucleus. In addition to being a substantial scientific advance, this thesis also serves as an outstanding introduction to the field of experimental neutrino physics for future students.
Author : Diego Aristizabal Sierra
Publisher : Frontiers Media SA
ISBN 13 : 2889633519
Total Pages : 293 pages
Book Rating : 4.8/5 (896 download)
Download or read book The Physics Associated with Neutrino Masses written by Diego Aristizabal Sierra and published by Frontiers Media SA. This book was released on 2020-01-13 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Author : Leonard A Cole
Publisher : World Scientific
ISBN 13 : 9811231079
Total Pages : 300 pages
Book Rating : 4.8/5 (112 download)
Download or read book Chasing The Ghost: Nobelist Fred Reines And The Neutrino written by Leonard A Cole and published by World Scientific. This book was released on 2021-03-17 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: A mixture of memoir and biography, Chasing the Ghost: Nobelist Fred Reines and the Neutrino tells a deeply human story that appeals both to scientists and non-scientists. Although the book relates to the important discovery of neutrinos, it is more intimately about Fred Reines than the technical details of neutrino physics. Narrated in a fashion to interest and excite the reader, the science presented here is accessible to a broad audience. Coursing through Reines' life, his various challenges and encounters, the book reveals constants of his persona. Reines displayed a sustained consistency as a respected leader, admired by students and colleagues as a fount of big ideas and ambition. A continuing source of inspiration and motivation to others, his most basic consistency was his passion for science. The quest for knowledge about the wondrous universe is a profoundly human endeavor. Fred Reines' life and his unremitting scientific curiosity are emblematic of that truth.'This book is a most welcome account about Frederick Reines and his great contributions to neutrino physics and astrophysics. The methods he designed in the 1950s to discover neutrinos in nuclear reactor experiments are still being used. His later work included the detection of atmospheric neutrinos which was a forerunner to the discovery of neutrino oscillations, the ability of neutrinos to change from one type to another. This finding was a significant step to other experiments that aim to answer profound questions about the nature of the universe including why it is composed of matter.'Takaaki KajitaNobel Laureate in PhysicsNeutrino Researcher, University of Tokyo 'Cole has provided a compelling personal and scientific account of a remarkable pioneer in Neutrino Physics.'Arthur B McDonaldNobel Laureate in PhysicsDirector of the Sudbury Neutrino ObservatoryProfessor, Queen's University, Ontario, Canada
Author : Allan D. Franklin
Publisher : CRC Press
ISBN 13 : 0429578431
Total Pages : 417 pages
Book Rating : 4.4/5 (295 download)
Download or read book Are There Really Neutrinos? written by Allan D. Franklin and published by CRC Press. This book was released on 2020-05-07 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: This intriguing and accessible book examines the experiments on neutrino oscillations. It argues that this history gives us good reason to believe in the existence of neutrinos, a particle that interacts so weakly with matter that its interaction length is measured in light years of lead. Yet, the scientific process has provided evidence of the elusive neutrino. Written in a style accessible to any reader with a college education in physics, Are There Really Neutrinos? is of interest to students and researchers alike. This second edition contains a new epilogue highlighting the new developments in neutrino physics over the past 20 years.
Author : Antonino Zichichi
Publisher : World Scientific
ISBN 13 : 9814603910
Total Pages : 596 pages
Book Rating : 4.8/5 (146 download)
Download or read book What We Would Like Lhc To Give Us - Proceedings Of The International School Of Subnuclear Physics written by Antonino Zichichi and published by World Scientific. This book was released on 2014-06-11 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the proceedings of the International School of Subnuclear Physics, ISSP 2012, 50th Course — ERICE, 23 June 2013 - 2 July 2012. This course was devoted to the celebrations of the 50th Anniversary of the Subnuclear Physics School which was started in 1961 by Antonino Zichichi with John Bell at CERN and formally established in 1962 by Bell, Blackett, Weisskopf, Rabi and Zichichi in Geneva (CERN). The lectures covered the latest and most significant achievements in theoretical and in experimental subnuclear physics.
Author : Kirsty Elizabeth Duffy
Publisher : Springer
ISBN 13 : 3319650408
Total Pages : 180 pages
Book Rating : 4.3/5 (196 download)
Download or read book First Measurement of Neutrino and Antineutrino Oscillation at T2K written by Kirsty Elizabeth Duffy and published by Springer. This book was released on 2017-09-13 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports the measurement of muon neutrino and antineutrino disappearance and electron neutrino and antineutrino appearance in a muon neutrino and antineutrino beam using the T2K experiment. It describes a result in neutrino physics that is a pioneering indication of charge-parity (CP) violation in neutrino oscillation; the first to be obtained from a single experiment. Neutrinos are some of the most abundant—but elusive—particles in the universe, and may provide a promising place to look for a potential solution to the puzzle of matter/antimatter imbalance in the observable universe. It has been firmly established that neutrinos can change flavour (or ‘oscillate’), as recognised by the 2015 Nobel Prize. The theory of neutrino oscillation allows for neutrinos and antineutrinos to oscillate differently (CP violation), and may provide insights into why our universe is matter-dominated. Bayesian statistical methods, including the Markov Chain Monte Carlo fitting technique, are used to simultaneously optimise several hundred systematic parameters describing detector, beam, and neutrino interaction uncertainties as well as the six oscillation parameters.
