[PDF] Effective Lagrangians From Chiral Quark Dynamics eBook

Author : Reinhard Alkofer
Publisher : Springer Science & Business Media
Page : 126 pages
File Size : 19,39 MB
Release : 2008-12-04
Category : Science
ISBN : 3540494545

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These notes give an introduction to the description of hadrons, i.e., mesons and baryons, within a quark model based on a chirally invariant quantum field theory. Emphasis is put on a didactic approach intended for graduate students with some background on functional integral techniques. Starting from QCD a motivation of a specific form of the effective quark interaction is given. Functional integral bosonization leads to a theory describing successfully meson properties. It possesses solitonic solutions which are identified as baryons. Via functional integral techniques a Faddeev equation for baryons describing them as bound states of a diquark and a quark is derived. Finally, a unification of these two complementary pictures of baryons is proposed.

Author : Antonio Dobado
Publisher : Springer Science & Business Media
Page : 322 pages
File Size : 48,79 MB
Release : 2012-12-06
Category : Science
ISBN : 3642591914

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This book is devoted to some recently developed techniques in quantum field theory (QFT), as well as to their main applications to different areas of parti cle physics. All together they are known as the effective or phenomenological Lagrangian formalism. Motivated by the enormous amount of work carried out in this field during the last years, our purpose when writing this book has been to give a modern and pedagogical exposition of the most relevant as pects of the topic. We hope that our efforts will be useful, both for graduated students in the search for a solid theoretical background in modern phe nomenology and for more experimented particle physicists willing to learn about this field or to start working on it. Even though we have tried to keep the book as self-contained as possible, it has been written assuming that the reader is familiar, at least, with the most basic concepts and techniques of QFT, gauge theories, the standard model (SM) and differential geometry, at the level of graduate studies. It is therefore possible that senior high-energy physicists may find the book too detailed and so they could probably omit several sections. The book is divided into two main parts and the appendices. In the first part we introduce the fundamentals of the effective Lagrangian formalism and other basic topics such as Ward identities, non-linear sigma models (NLSM), spontaneous symmetry breaking (SSB), anomalies, the SM symmetries, etc.

Author : Maciej A Nowak
Publisher : World Scientific
Page : 560 pages
File Size : 33,22 MB
Release : 1996-09-03
Category : Science
ISBN : 9814505501

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The physics of strongly interacting many-body systems known as nuclear physics is a mature discipline which has achieved a remarkably quantitative success. It has explained with an impressive accuracy the properties of nuclei from the deuteron to heavy nuclei containing several hundreds of nucleons. This is the more remarkable when one realizes that in no way did the success depend on the existence of, or knowledge derived from, the fundamental theory of strong interactions now believed to be quantum chromodynamics (QCD).This monograph is a first, albeit embryonic, attempt to explain how a nucleus can be understood without invoking the explicit degrees of freedom of quarks and gluons while still staying within the basic premise of QCD and furthermore why do quark-gluon signatures not show up prominently in nuclear processes, including those processes involving short-distance encounters within nuclei. Such an understanding is largely based on the modern concepts of broken chiral symmetry and is believed to be essential in uncovering new physics expected to figure in the hadronic environment under extreme conditions of high temperature and/or high density.

Author : Keh-fei Liu
Publisher : World Scientific
Page : 580 pages
File Size : 40,97 MB
Release : 1987-04-01
Category : Science
ISBN : 9814507806

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This review volume on topological and nontopological chiral solitons presents a global view on the current developments of this field in particle and nuclear physics. The book addresses problems in quantization, restoration of translational and rotational symmetry, and the field theoretical approach to solitons which are common problems in the field of solitons. Primarily aimed for graduate students and the novice in the field, the collected articless cover a broad spectrum of topics in formalism as well as phenomenology.

Author : Mohammad W. Ahmed
Publisher : World Scientific
Page : 477 pages
File Size : 12,72 MB
Release : 2007
Category : Science
ISBN : 9812790802

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Chiral Dynamics 2006 is the 5th International Workshop which examines the implications and the development of an approximate low-energy solution to the QCD Lagrangian based upon Chiral Symmetry. Advances in theory and experiment are presented in 20 plenary session papers along with more than one-hundred papers, including summaries, from the three working groups. Sample Chapter(s). Part 1.1: Opening Remarks: Experimental Tests of Chiral Symmetry Breaking (311 KB). Contents: Some Recent Developments in Chiral Perturbation Theory (U-G Meiner); Recent Results from HAPPEX (R Michaels); Kaon Physics: Recent Experimental Progress (M Moulson); Recent KTeV Results on Radiative Kaon Decays (M C Ronquest); Partially Quenched CHPT Results to Two Loops (J Bijnens); Finite Volume Effects: Lattice Meets CHPT (G Schierholz); Quark Mass Dependence of LECs in the Two-Flavour Sector (M Schmid); Leading Chiral Logarithms from Unitarity, Analyticity and the Roy Equations (A Fuhrer); Power Counting in Nuclear Chiral Effective Field Theory (U van Kolck); The Challenge of Calculating Baryon-Baryon Scattering from Lattice QCD (S R Beane); Few-Body Studies at KVI (J G Messchendorp); Compton Scattering on HE-3 (D Choudhury); Lattice Discretization Errors in Chiral Effective Field Theories (B C Tiburzi); Uncertainty Bands for Chiral Extrapolations (B U Musch); and other papers. Readership: Graduate students and academics in nuclear physics.

Author : Chang-Hwan Lee
Publisher : World Scientific
Page : 373 pages
File Size : 49,70 MB
Release : 2008
Category : Science
ISBN : 9812705880

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This is the sequel to the first volume to treat in one effective field theory framework the physics of strongly interacting matter under extreme conditions. This is vital for understanding the high temperature phenomena taking place in relativistic heavy ion collisions and in the early Universe, as well as the high-density matter predicted to be present in compact stars. The underlying thesis is that what governs hadronic properties in a heat bath and/or a dense medium is hidden local symmetry which emerges from chiral dynamics of light quark systems and from the duality between QCD in 4D and bulk gravity in 5D as in AdS/QCD. Special attention is paid to hot matter relevant for relativistic heavy ion processes and to dense matter relevant for compact stars that are either stable or on the verge of collapse into black holes.

Author : A. V. Smilga
Publisher : World Scientific
Page : 352 pages
File Size : 31,89 MB
Release : 2001
Category : Science
ISBN : 9810243316

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Quantum chromodynamics is the fundamental theory of strong interactions. It is a physical theory describing Nature. Lectures on Quantum Chromodynamics concentrates, however, not on the phenomenological aspect of QCD; books with comprehensive coverage of phenomenological issues have been written. What the reader will find in this book is a profound discussion on the theoretical foundations of QCD with emphasis on the nonperturbative formulation of the theory: What is gauge symmetry on the classical and on the quantum level? What is the path integral in field theory? How to define the path integral on the lattice, keeping intact as many symmetries of the continuum theory as possible? What is the QCD vacuum state? What is the effective low energy dynamics of QCD? How do the ITEP sum rules work? What happens if we heat and/or squeeze hadronic matter? Perturbative issues are also discussed: How to calculate Feynman graphs? What is the BRST symmetry? What is the meaning of the renormalization procedure? How to resum infrared and collinear singularities? And so on.The book is an outgrowth of the course of lectures given by the author for graduate students at ITEP in Moscow. Much extra material has been added.

Author : Li-sheng Geng
Publisher : World Scientific
Page : 258 pages
File Size : 33,39 MB
Release : 2014-10-03
Category : Science
ISBN : 9814618233

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This proceedings volume collected papers presented at a recent symposium on Chiral Symmetry in Hadrons and Nuclei — the seventh in a series of international symposia — with an aim of providing a platform for discussions among the experts and an overview of the present status in the hadron and nuclear physics related to the chiral symmetry.The recent past years have seen a remarkable progress towards a unified description of nonperturbative strong interaction phenomena based on the fundamental theory of the strong interaction, Quantum ChromoDynamics, and Effective Field Theories. The topics discussed in these proceedings include: chiral and heavy-quark spin symmetry; chiral dynamics of few-body hadron systems; chiral symmetry and hadrons in a nuclear medium; chiral dynamics in nucleon-nucleon interaction and atomic nuclei; chiral symmetry in rotating nuclei; hadron structure and interactions; exotic hadrons, heavy flavor hadrons and nuclei; mesonic atoms and nuclei.