Progress in Electroweak Interactions PDF Download

Author: J. Thanh Van Tran
Publisher: Atlantica Séguier Frontières
ISBN: 9782863320426
Category : Electroweak interactions
Languages : en
Pages : 666

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Author: J. Thanh Van Tran
Publisher:
ISBN:
Category :
Languages : en
Pages : 641

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Author: H. Mitter
Publisher: Springer Science & Business Media
ISBN: 3709140315
Category : Science
Languages : en
Pages : 476

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The papers contained in this volume are invited lec tures presented at the 21st "Universit~tswochen fUr Kern physik" in Schladming in February 1982. To consider electro magnetic and weak interactions as manifestations of a single theory is a standpoint, which is generally accepted by now. The goal of the school was to outline the present state of this unified theory and to discuss possible future developments. Thanks to the generous support provided by the Austrian Ministry of Science and Research, the Styrian Government and other sponsors, it was again possible to invite experts in the field as lecturers. The lecture notes have been reexamined by the authors and are now published in their final form to enable a larger number of physicists to profit from them. Since the lectures are already quite voluminous, we have decided to restrict the publication to the lectures themselves and omit all seminars, interesting as they were, as well as all details connected with the meeting. It is a pleasure to thank all the lecturers for their efforts, making it possible to speed up publication. Thanks are also due to L. Pittner for organisation and proof-reading as well as to Mrs. Krenn and Mrs. Neuhold for the careful typing of the papers. H. Mitter Acta Physica Austriaca, Suppl. XXIV, 3-62 (1982) © by Springer-Verlag 1982 INTRODUCTION TO GAUGE THEORIES OF ELECTRO + WEAK INTERACTIONS by G. ECKER Institut fUr Theoretische Physik Universitat Wien, Austria TABLE OF CONTENTS I

Author: Regina Demina
Publisher: World Scientific
ISBN: 9811222266
Category : Science
Languages : en
Pages : 234

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Fundamental interactions are mediated by bosonic fields, quanta of which are realized as particles. The properties of these fields typically obey certain symmetry rules. In this book we discuss the symmetry between two types of interactions — electromagnetic, which are familiar to anyone who turned on the electric lights, and weak, which govern the nuclear reactions that fuel the Sun. While there is a symmetry between these two types of interactions, it is broken. The unified theory of electroweak interactions was developed over 50 years ago. The Higgs scalar field named after one of the theorists that proposed it, is believed to be responsible for the breaking of the electroweak symmetry. Yet, it is only now after the discovery of the Higgs boson in 2012 by the LHC experiments, that we can study the mechanism of the electroweak symmetry breaking. This book discusses the theoretical developments that led to the construction of this theory, the discovery and the experimental observations that need to come to fully establish the validity of the model.

Author: Carlo M. Becchi
Publisher: Springer
ISBN: 3319061305
Category : Science
Languages : en
Pages : 198

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This book offers a self-contained introduction to the theory of electroweak interactions based on the semi-classical approach to relativistic quantum field theory, with thorough discussion of key aspects of the field. The basic tools for the calculation of cross sections and decay rates in the context of relativistic quantum field theory are reviewed in a short, but complete and rigorous, presentation. Special attention is focused on relativistic scattering theory and on calculation of amplitude in the semi-classical approximation. The central part of the book is devoted to an illustration of the unified field theory of electromagnetic and weak interactions as a quantum field theory with spontaneously broken gauge invariance; particular emphasis is placed on experimental confirmations of the theory. The closing chapters address the most recent developments in electroweak phenomenology and provide an introduction to the theory and phenomenology of neutrino oscillations. In this 2nd edition the discussion of relativistic scattering processes in the semi-classical approximation has been revised and as a result intermediate results are now explicitly proven. Furthermore, the recent discovery of the Higgs boson is now taken into account throughout the book. In particular, the Higgs decay channel into a pair of photons, which has played a crucial role in the discovery, is discussed. As in the first edition, the accent is still on the semi-classical approximation. However, in view of the necessity of a discussion of H !, the authors give several indications about corrections to the semiclassical approximation. Violation of unitarity is discussed in more detail, including the dispersion relations as a tool for computing loop corrections; the above-mentioned Higgs decay channel is illustrated by means of a full one-loop calculation; and finally, loop effects on the production of unstable particles (such as the Z0 boson) are now discussed. Finally, the neutrino mass and oscillation analysis is updated taking into account the major achievements of the last years.

Author: Harvey B. Newman
Publisher: Springer Science & Business Media
ISBN: 1461324513
Category : Science
Languages : en
Pages : 861

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The first Europhysics Study Conference on Electroweak Effects at High Energies was held at the "Ettore Majorana" Centre for Scientific Culture in Erice, Sicily from February 1 -12, 1983. The conference was attended by 61 physicists from 11 countries. The conference was sponsored by the European Physical Society, the Italian Ministry of Public Education, the Italian Ministry of Technological Research, the Sicilian Regional Government and the California Institute of Technology. CONFERENCE FORMAT The Study Conference followed a new intensive format in which the state of our knowledge of the electroweak interaction, and the relation of the electroweak sector to Grand Unified and Superunified Theories was reviewed in some depth. During the two week conference, 54 experimental and theoretical talks were presented, and four evening discussion sessions were held. The Erice surroundings, the wide-ranging conference program, and the fact that nearly all of the participants were directly involved in recent major experimental or theoretical developments, led to animated and very friendly discussions. Participants had the rare opportunity to view most of the major trends in high energy physics in a short interval of time, and to discuss and contemplate the trends in the uniquely peaceful yet stimulating atmosphere which is an Erice tradition.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 7

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The work done on this project was focused on two LAMPF experiments. The MEGA experiment, a high-sensitivity search for the lepton-family-number-violating decay [mu] [yields] e [gamma] to a sensitivity which, measured in terms of the branching ratio, BR = [[mu] [yields] e [gamma]]/[[mu] [yields] ev[sub [mu]] v[sub e]] [approximately] 10[sup [minus]13], is over two orders of magnitude better than previously reported values. The second is a precision measurement of the Michel [rho] parameter from the positron energy spectrum of [mu] [yields] ev[sub [mu]] v[sub e] to test the V-A theory of weak interactions. The uncertainty in the measurement of the Michel [rho] parameter is expected to be a factor of three lower than the present reported value.

Author: Walter Greiner
Publisher: Springer Science & Business Media
ISBN: 3662033232
Category : Science
Languages : en
Pages : 406

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Gauge Theory of Weak Interactions treats the unification of electromagnetic and weak interactions and considers related phenomena. First, the Fermi theory of beta decay is presented, followed by a discussion of parity violation, clarifying the importance of symmetries. Then the concept of a spontaneously broken gauge theory is introduced, and all necessary mathematical tools are carefully developed. The "standard model" of unified electroweak interactions is thoroughly discussed including current developments. The final chapter contains an introduction to unified theories of strong and electroweak interactions. Numerous solved examples and problems make this volume uniquely suited as a text for an advanced course. This second edition has been corrected and is presented in a new cover and format.

Author: Alan Astbury
Publisher: World Scientific
ISBN: 9814543373
Category : Science
Languages : en
Pages : 594

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This volume deals with the electroweak interactions at low and high energies. The results of the collider experiments are discussed, and the low energy experiments with complications for astrophysics are considered. Also, theoretical developments are presented to highlight the impact of forthcoming experiments and to find new directions of study.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 12

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In the project under review, progress has been made on the problem of dynamic symmetries exhibited by mesons as color strings. A novel property of the vibrational states of heavy mesons, that of an approximate saturation of a particular spectroscopic interval, has been found as a ''fingerprint'' for linear quark confinement potentials. Progress has been continued in the study of electroweak excitation of the baryon resonances, including the use of Compton scattering.