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Neutrino Flavor Instabilities In A Time Dependent Supernova Model
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Book Synopsis Neutrino Flavor Instabilities in a Time-dependent Supernova Model by :
Download or read book Neutrino Flavor Instabilities in a Time-dependent Supernova Model written by and published by . This book was released on 2015 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this study, a dense neutrino medium such as that inside a core-collapse supernova can experience collective flavor conversion or oscillations because of the neutral-current weak interaction among the neutrinos. This phenomenon has been studied in a restricted, stationary supernova model which possesses the (spatial) spherical symmetry about the center of the supernova and the (directional) axial symmetry around the radial direction. Recently it has been shown that these spatial and directional symmetries can be broken spontaneously by collective neutrino oscillations. In this letter we analyze the neutrino flavor instabilities in a time-dependent supernova model. Our results show that collective neutrino oscillations start at approximately the same radius in both the stationary and time-dependent supernova models unless there exist very rapid variations in local physical conditions on timescales of a few microseconds or shorter. Our results also suggest that collective neutrino oscillations can vary rapidly with time in the regimes where they do occur which need to be studied in time-dependent supernova models.
Book Synopsis Neutrino Mass and Mixing Schemes by : Richard C. Schirato
Download or read book Neutrino Mass and Mixing Schemes written by Richard C. Schirato and published by . This book was released on 2002 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Open Issues in Core Collapse Supernova Theory by : Anthony Mezzacappa
Download or read book Open Issues in Core Collapse Supernova Theory written by Anthony Mezzacappa and published by World Scientific. This book was released on 2005 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Efforts to uncover the explosion mechanism of core collapse supernovae and to understand all of their associated phenomena have been ongoing for nearly four decades. Despite this, our theoretical understanding of these cosmic events remains limited; two- and three-dimensional modeling of these events is in its infancy. Most of the modeling efforts over the past four decades have, by necessity, been constrained to spherical symmetry, with the first two-dimensional, albeit simplified, models appearing only during the last decade. Simulations to understand the complex interplay between the turbulent stellar core fluid flow, its magnetic fields, the neutrinos produced in and emanating from the proto-neutron star, the stellar core rotation, and the strong gravitational fields have yet to be performed. Only subsets of these fundamental ingredients have been included in the models thus far, often with approximation. The purpose of this volume is to identify the outstanding issues that remain in order to come to a complete understanding of these important astrophysical events. As the book focuses on open issues rather than the current state of the art in the field OCo although the latter will certainly be discussed OCo it will remain relevant for some time."
Book Synopsis Effects of Non-standard Neutrino Flavor Changing Interactions in Core Collapse Supernovae by : Philip Amanik
Download or read book Effects of Non-standard Neutrino Flavor Changing Interactions in Core Collapse Supernovae written by Philip Amanik and published by . This book was released on 2006 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-standard neutrino flavor changing interactions are included in the core collapse supernova model, and their effects on the model are investigated. Analytical and numerical results are presented. The predictions from a model that includes the new neutrino interactions are found to be different from the predictions of the original model. The non-standard interactions are predicted by some extensions to the standard model, but no such interactions have been discovered or proven to exist. An example of an interaction which comes from R-parity violating Supersymmetry is discussed in detail in Chapter 1. Reviews of nuclear physics and the supernova model are also given in this chapter. The cross sections for neutrino flavor changing scattering in vacuum with nuclei and free nucleons are given in Chapter 1. Corrections which account for neutrinos scattering with nuclei in the core medium are given in Chapter 2. Uncertainties in the equation of state and composition of nuclear matter at high density, and the impact of these uncertainties on neutrino scattering cross sections are discussed in Chapter 2 as well. Analytical estimates of flavor changing scattering rates are calculated in Chapter 1 and a qualitative discussion of the effects on the model is then offered. Results from a one-zone core collapse numerical simulation are presented in Chapter 2. A detailed discussion of the code, and equations which describe the core are included in this chapter. Chapter 3 outlines how to include these interactions in a full simulation with neutrino transport and hydrodynamics.
Book Synopsis Neutrinos In Physics And Astrophysics by : Esteban Roulet
Download or read book Neutrinos In Physics And Astrophysics written by Esteban Roulet and published by World Scientific. This book was released on 2022-09-20 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the field of neutrino physics and astrophysics, providing an up-to-date presentation of the different research topics on the frontier of the field. It starts with a historical description to understand how the different aspects of our knowledge about the neutrinos evolved up to the present state. The main required elements of the Standard Model of electroweak interactions are introduced, and the different neutrino interactions and detection techniques are presented. We introduce the various ways to give neutrinos a mass and the phenomenon of neutrino oscillations which provides the main evidence for non-vanishing neutrino masses. We then consider the neutrinos produced in the Sun, what we have learned from them, and how they can also be useful to study our star. The geoneutrinos produced by the radioactivity in the Earth are discussed and the status of their detection is presented. We survey the neutrino production in the supernova explosions at the end of the life of very massive stars, what has been observed in SN1987A, and what could be learned from a future supernova or from the observation of the diffuse supernova neutrino background. We describe in detail the neutrino production by cosmic rays interacting in the atmosphere, the evidence for their flavor oscillations, and the oscillograms to describe their flavor change in terrestrial matter. The different mechanisms of production of high-energy astrophysical neutrinos and the observations achieved with the IceCube detector are presented, also discussing their flavor content by means of the flavor triangle. We then examine the cosmological neutrino background, its impact on Big Bang nucleosynthesis and on the CMB observations, with the associated bound on their masses and effective number. Finally, we review the basics of the leptogenesis scenarios, which provide an attractive explanation for the observed baryon asymmetry of the Universe.
Book Synopsis Does the Finite Size of the Proto-neutron Star Preclude Supernova Neutrino Flavor Scintillation Due to Turbulence? by :
Download or read book Does the Finite Size of the Proto-neutron Star Preclude Supernova Neutrino Flavor Scintillation Due to Turbulence? written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis XXII DAE High Energy Physics Symposium by : Md. Naimuddin
Download or read book XXII DAE High Energy Physics Symposium written by Md. Naimuddin and published by Springer. This book was released on 2018-05-23 with total page 879 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings gather invited and contributed talks presented at the XXII DAE-BRNS High Energy Physics (HEP) Symposium, which was held at the University of Delhi, India, on 12–16 December 2016. The contributions cover a variety of topics in particle physics, astroparticle physics, cosmology and related areas from both experimental and theoretical perspectives, namely (1) Neutrino Physics, (2) Standard Model Physics (including Electroweak, Flavour Physics), (3) Beyond Standard Model Physics, (4) Heavy Ion Physics & QCD (Quantum Chromodynamics), (5) Particle Astrophysics & Cosmology, (6) Future Experiments and Detector Development, (7) Formal Theory, and (8) Societal Applications: Medical Physics, Imaging, etc. The DAE-BRNS High Energy Physics Symposium, widely considered to be one of the leading symposiums in the field of Elementary Particle Physics, is held every other year in India and supported by the Board of Research in Nuclear Sciences (BRNS), Department of Atomic Energy (DAE), India. As many as 400 physicists and researchers attended the 22nd Symposium to discuss the latest advances in the field. A poster session was also organized to highlight the work and findings of young researchers. Bringing together the essential content, the book offers a valuable resource for both beginning and advanced researchers in the field.
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 Combining Collective, MSW, and Turbulence Effects in Supernova Neutrino Flavor Evolution by :
Download or read book Combining Collective, MSW, and Turbulence Effects in Supernova Neutrino Flavor Evolution written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to decode the neutrino burst signal from a Galactic core-collapse supernova and reveal the complicated inner workings of the explosion we need a thorough understanding of the neutrino flavor evolution from the proto-neutron star outwards. The flavor content of the signal evolves due to both neutrino collective effects and matter effects which can lead to a highly interesting interplay and distinctive spectral features. In this paper we investigate the supernova neutrino flavor evolution in three different progenitors and include collective flavor effects, the evolution of the Mikheyev, Smirnov & Wolfenstein conversion due to the shock wave passage through the star, and the impact of turbulence. In the Oxygen-Neon-Magnesium supernova we find that the impact of turbulence is both brief and slight during a window of 1-2 seconds post bounce. Thus the spectral features of collective and shock effects in the neutrino signals from ONeMg supernovae may be almost turbulence free making them the easiest to interpret. For the more massive progenitors we again find that small amplitude turbulence, up to 10%, leads to a minimal modification of the signal, and the emerging neutrino spectra retain both collective and MSW features. However, when larger amounts of turbulence is added, 30% and 50%, the features of collective and shock wave effects in the high density resonance channel are almost completely obscured at late times. Yet at the same time we find the other mixing channels - the low density resonance channel and the non-resonant channels - begin to develop turbulence signatures. Large amplitude turbulent motions in the outer layers of more massive, iron core-collapse supernovae may obscure the most obvious fingerprints of collective and shock wave effects in the neutrino signal but cannot remove them completely, and additionally bring about new features in the signal.
Book Synopsis Handbook of Nuclear Physics by : Isao Tanihata
Download or read book Handbook of Nuclear Physics written by Isao Tanihata and published by Springer Nature. This book was released on 2023-09-04 with total page 4180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is a comprehensive, systematic source of modern nuclear physics. It aims to summarize experimental and theoretical discoveries and an understanding of unstable nuclei and their exotic structures, which were opened up by the development of radioactive ion (RI) beam in the late 1980s. The handbook comprises three major parts. In the first part, the experiments and measured facts are well organized and reviewed. The second part summarizes recognized theories to explain the experimental facts introduced in the first part. Reflecting recent synergistic progress involving both experiment and theory, the chapters both parts are mutually related. The last part focuses on cosmo-nuclear physics—one of the mainstream subjects in modern nuclear physics. Those comprehensive topics are presented concisely. Supported by introductory reviews, all chapters are designed to present their topics in a manner accessible to readers at the graduate level. The book therefore serves as a valuable source for beginners as well, helping them to learn modern nuclear physics.
Book Synopsis Supernovae, Neutron Star Physics and Nucleosynthesis by : Debades Bandyopadhyay
Download or read book Supernovae, Neutron Star Physics and Nucleosynthesis written by Debades Bandyopadhyay and published by Springer Nature. This book was released on 2022-03-28 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the interdisciplinary areas of nuclear physics, supernovae and neutron star physics. It addresses the physics and astrophysics of the spectacular supernova explosions, starting with the collapse of massive stars and ending with the birth of neutron stars or black holes. Recent progress in the understanding of core collapse supernova (CCSN) and observational aspects of future detections of neutrinos from CCSN explosions are discussed. The other main focus in this text is the novel phases of dense nuclear matter, its compositions and equation of state (EoS) from low to very high baryon density relevant to supernovae and neutron stars. The multi-messenger astrophysics of binary neutron star merger GW170817 and its relation to EoS through tidal deformability are also presented in detail. The synthesis of elements heavier than iron in the supernova and neutron star environment by the rapid (r)-process are treated here with special emphasis on the nucleosynthesis in the ejected material from GW170817. This monograph is written for graduate students and researchers in the field of nuclear astrophysics.
Book Synopsis Supernova Explosions by : David Branch
Download or read book Supernova Explosions written by David Branch and published by Springer. This book was released on 2017-08-02 with total page 719 pages. Available in PDF, EPUB and Kindle. Book excerpt: Targeting advanced students of astronomy and physics, as well as astronomers and physicists contemplating research on supernovae or related fields, David Branch and J. Craig Wheeler offer a modern account of the nature, causes and consequences of supernovae, as well as of issues that remain to be resolved. Owing especially to (1) the appearance of supernova 1987A in the nearby Large Magellanic Cloud, (2) the spectacularly successful use of supernovae as distance indicators for cosmology, (3) the association of some supernovae with the enigmatic cosmic gamma-ray bursts, and (4) the discovery of a class of superluminous supernovae, the pace of supernova research has been increasing sharply. This monograph serves as a broad survey of modern supernova research and a guide to the current literature. The book’s emphasis is on the explosive phases of supernovae. Part 1 is devoted to a survey of the kinds of observations that inform us about supernovae, some basic interpretations of such data, and an overview of the evolution of stars that brings them to an explosive endpoint. Part 2 goes into more detail on core-collapse and superluminous events: which kinds of stars produce them, and how do they do it? Part 3 is concerned with the stellar progenitors and explosion mechanisms of thermonuclear (Type Ia) supernovae. Part 4 is about consequences of supernovae and some applications to astrophysics and cosmology. References are provided in sufficient number to help the reader enter the literature.
Book Synopsis High Performance Computing on Vector Systems 2005 by : Thomas Bönisch
Download or read book High Performance Computing on Vector Systems 2005 written by Thomas Bönisch and published by Springer Science & Business Media. This book was released on 2007-05-31 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents the state of the art in high performance computing and simulation on modern supercomputer architectures. It covers trends in hardware and software development in general and specifically the future of vector-based systems and heterogeneous architectures. The application contributions include computational fluid dynamics, physics, chemistry, astrophysics, and biology. Innovative application fields like multiphysics simulations and material science are presented.
Book Synopsis Shock Wave and Neutrino Self-interaction Effects Upon Neutrino Flavor Conversion in the Supernovae Environment by : Sébastien Galais
Download or read book Shock Wave and Neutrino Self-interaction Effects Upon Neutrino Flavor Conversion in the Supernovae Environment written by Sébastien Galais and published by . This book was released on 2012 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: The works presented in this thesis deal with the flavor conversion of the supernova neutrinos. In a first work, we performed the first complete calculation including the shock wave and the self-interaction for the estimate of the diffuse supernova neutrino background (dsnb) flux arriving on earth. This flux corresponds to the combination of the neutrinos coming from all the supernovae that exploded in the visible universe. By varying the angle theta_13 of the mixing matrix u_mnsp, we showed that the shock wave has a significant impact on the dsnb flux. At the same time we proposed a smplified model that accounts for the shock wave effects and that could be used for future calculations of the dsnb. The other two works are focused on the first exact analytical derivation of the matter basis in the presence of the self-interaction. We underlined, for the two flavors case, the important role of the matter phase beta tilde and we established a condition on the elements of the flavor hamiltonian for the end of the synchronization phase and the onset of the bipolar oscillations. Through the matter basis, we identified, by using the polarization vector formalism, a correspondence between the "spectral split" and the magnetic resonance phenomena. This has allowed us to confirm hypothesis such as the adiabaticity of the propagation, the use of the average magnetic field et the corotating frame that were postulated with the help of smplified models. A prelminary study of the three flavors case indicate us the conservation of this correspondence.
Book Synopsis Neutrino Flavor Transformation in Core-collapse Supernovae by : John F. Cherry (Jr.)
Download or read book Neutrino Flavor Transformation in Core-collapse Supernovae written by John F. Cherry (Jr.) and published by . This book was released on 2012 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever since a collection of 19 flickers of Cherenkov radiation in neutrino detectors around the world have been linked to SN 1987a, the physics community has been certain that neutrinos are the pivotal actors in core-collapse supernovae. SN1987a confirmed Jim Wilson and Sterling Colgate's basic picture of the collapsed core of a massive star shining with neutrinos of all kinds, radiating with a luminosity of 1053 erg s−1. At a stroke neutrinos provided a mechanism by which nature could explode an object as massive as a star and produce the heavy elements that we find all around us. Like all great discoveries, however, the neutrino burst of SN 1987a raised more questions than it answered. Neutrinos are known to change their lepton flavor as a purely quantum mechanical process in vacuum and in the sun and the earth, and our experimental knowledge of this process leads us to an inexorable conclusion: neutrinos will change their flavor states in supernovae, as well. One of the most deucedly difficult problems in neutrino astrophysics for the last few decades has been the question of how neutrino flavor transforms in the supernova environment. The intense flux of neutrinos from the core of a supernova is so numerous that the interactions of neutrinos with one another is strong enough to create a quantum mechanical coupling of their flavor evolution histories, so that the flavor states of all neutrinos are non-linearly related to one another. This non-linear coupling of neutrino flavor states can have fascinating consequences, leading to collective flavor transformation phenomena, where all neutrinos emerging from the core begin to change flavor simultaneously. The dynamics of these non-linear effects can provide great insight into as yet unconstrained sectors of neutrino physics. Likewise, should the details of neutrino flavor mixing be worked out before the next galactic supernova, the understanding of neutrino flavor transformation might act as a neutrino telescope, allowing an observer to probe the depths of an exploding star. However, supernovae are environments that test the limits of our physical understanding. A cherished paradigm within the supernova neutrino community, the "neutrino bulb" model, has been found to be critically flawed early in the explosion. The collapsed core is not the only source of neutrinos which are important for flavor transformation. The early epochs of supernovae posses a "halo" of neutrinos, which have scattered inwards from the outer reaches of the explosion envelope. These halo neutrinos carry with them quantum information about the flavor transformation that has transpired elsewhere in the star, and can dominate the flavor evolution of neutrinos emerging from the core. This alters the fundamental nature of the problem of neutrino flavor transformation in supernovae, and will require all new approaches to address.
Book Synopsis Neutrino Astrophysics by : John N. Bahcall
Download or read book Neutrino Astrophysics written by John N. Bahcall and published by Cambridge University Press. This book was released on 1989-07-28 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative text provides a lively, thought-provoking and informative summary of neutrino astrophysics. Neutrino astronomy is being revolutionized by the availability of new observational facilities. Theoretical work in astrophysics and in particle physics in increasing rapidly. The subject of solar neutrinos has many seemingly independent aspects, both in its theoretical basis (involving nuclear, atomic, and particle physics, geochemistry, and astronomy). For many physicists, solar neutrinos constitute the low-energy frontier of high-energy physics. Results from all these disciplines are combined here, providing a timely and unified discussion of the field. Each chapter begins with a succinct overview of material to be presented and ends with an annotated bibliography. For advanced undergraduate students, but will be essential reading for all researchers interested in the physics of neutrinos and what they reveal about the nature of the Universe.
Book Synopsis Supernovae, Neutrinos, and Neutron Stars by : Hong-yee Chiu
Download or read book Supernovae, Neutrinos, and Neutron Stars written by Hong-yee Chiu and published by . This book was released on 1964 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
