Download or read book Quantum Chromodynamics and Hadronic Interactions at Short Distances written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A brief introduction to QCD and asymptotic freedom is given. A new method to avoid scheme and scale ambiguities in perturbative QCD predictions is discussed. A detailed discussion of light-cone perturbation theory and the Fock state expansion of hadronic wavefunctions is given. The QCD equation of motion is also discussed. Measures of the hadronic wavefunction (form factors, magnetic moments, etc.), and the QCD analysis of high momentum transfer exclusive processes are discussed. It is also shown how meson distribution amplitudes can be measured in .gamma gamma. .-->. M anti M reactions. The connection of the Fock state basis to leading and higher twist contributions to deep inelastic scattering is given. How many different QCD processes are interelated through the hadronic Fock states is discussed, and a novel type of QCD subprocess - direct coupled hadron-induced reactions is considered. A new prediction for the proton form factor is also given. Also, a simple phenomenology of hadron wavefunctions is introduced, and present constraints on the form and normalization of the valence meson and nucleon Fock states are discussed. An important conclusion is that the valence Fock state as defined at equal time or the light cone appears to have a significantly smaller radius than that of the physical hadron; higher Fock states thus play an essential role in low momentum transfer phenomenology. Applications to quark jet diffraction excitation and the hidden heavy quark Fock state structure of hadrons are also discussed. 83 references. (WHK).
Download or read book Connecting the Hadron Mass Scale to the Fundamental Mass Scale of Quantum Chromodynamics 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, establishing an explicit connection between the long distance physics of confinement and the dynamical interactions of quarks and gluons at short distances has been a long-sought goal of quantum chromodynamics. Using holographic QCD, we derive a direct analytic relation between the scale ? which determines the masses of hadrons and the scale ?s which controls the predictions of perturbative QCD at very short distances. The resulting prediction ?s = 0.341±0.032 GeV in the MS¯ scheme agrees well with the experimental average 0.339±0.016 GeV. We also derive a relation between ?s and the QCD string tension ?. This connection between the fundamental hadronic scale underlying the physics of quark confinement and the perturbative QCD scale controlling hard collisions can be carried out in any renormalization scheme.
Download or read book Short Distance Phenomena in Nuclear Physics written by David H. Boal and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Each summer, the Theoretical Physics Division of the Canadian Association of Physicists organizes a summer institute of two weeks duration on a current topic in theoretical physics. This volume contains the lectures from the Pacific Summer Institute held at Pearson College on Vancouver Island, B. C. (Canada) from August 23 to September 3, 1982. The Institute was titled "Progress in Nuclear Dynamics: Short-Distance Behavior in the Nucleus". The primary source of funds for the Institute came from NATO through its Advanced Study Institute programme. Significant finan cial support is also gratefully acknowledged from TRIUMF, Simon Fraser University, Natural Sciences and Engineering Research Council of Canada, and Atomic Energy of Canada Ltd. The topic of the school was the role of the substructure of hadrons--quarks and gluons--in nuclear physics. This includes not only the effects which may be observed in specific nuclear states, such as form factors at large momentum transfer, or the presence of hidden color components in the ground states of few nucleon systems, but also effects which may be observed in the nuclear matter contin uum: the phase transition from normal nuclear matter to a plasma of quarks and gluons. The current status of the long distance phenom enology of the nucleus--the interacting boson approximation and the role of n's and ~'s in nuclear structure, is also reviewed.
Download or read book Applications of Quantum Chromodynamics to Hadronic and Nuclear Interactions written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of perturbative QCD and light-cone Fock methods to the structure of hadrons and nuclei and their exclusive and inclusive interactions at short distances are reviewed.
Download or read book Quantum Chromodynamics written by Anne Mosher and published by . This book was released on 1980 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Relation Between the Fundamental Scale Controlling High Energy Interactions of Quarks and the Proton Mass written by and published by . This book was released on 2015 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum Chromodynamics (QCD) provides a fundamental description of the physics binding quarks into protons, neutrons, and other hadrons. QCD is well understood at short distances where perturbative calculations are feasible. Establishing an explicit relation between this regime and the large-distance physics of quark confinement has been a long-sought goal. A major challenge is to relate the parameter [Lambda]s, which controls the predictions of perturbative QCD (pQCD) at short distances, to the masses of hadrons. Here we show how new theoretical insights into QCD's behavior at large and small distances lead to an analytical relation between hadronic masses and [Lambda]s. The resulting prediction, [Lambda]s = 0.341 " 0.024 GeV agrees well with the experimental value 0.339 " 0.016 GeV. Conversely, the experimental value of [Lambda]s can be used to predict the masses of hadrons, a task which had so far only been accomplished through intensive numerical lattice calculations, requiring several phenomenological input parameters.
Download or read book 97 QCD and High Energy Hadronic Interactions written by J. Thanh Van Tran and published by Atlantica Séguier Frontières. This book was released on 1997 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantum Chromodynamics written by Walter Greiner and published by Springer Science & Business Media. This book was released on 2002 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a self-contained introduction to perturbative and nonperturbative quantum chromodynamics. Relativistic quantum field theory is recapitulated and scattering theory is discussed in the framework of scalar quantum electrodynamics. Then the gauge theory of quarks and gluons is introduced, before moving on to an advanced discussion of perturbative and nonperturbative techniques in state-of-the-art QCD.
Download or read book Lectures on Quantum Chromodynamics written by A. V. Smilga and published by World Scientific. This book was released on 2001 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Quantum Chromodynamics in Few nucleon Systems written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most important implications of quantum chromodynamics (QCD) is that nuclear systems and forces can be described at a fundamental level. The theory provides natural explanations for the basic features of hadronic physics: the meson and baryon spectra, quark statistics, the structure of the weak and electromagnetic currents of hadrons, the scale-invariance of hadronic interactions at short distances, and evidently, color (i.e., quark and gluon) confinement at large distances. Many different and diverse tests have confirmed the basic predictions of QCD; however, since tests of quark and gluon interactions must be done within the confines of hadrons there have been few truly quantitative checks. Nevertheless, it appears likely that QCD is the fundamental theory of hadronic and nuclear interactions in the same sense that QED gives a precise description of electrodynamic interctions. Topics discussed include exclusive processes in QCD, the deuteron in QCD, reduced nuclear amplitudes, and limitations of traditional nuclear physics. 32 references. (WHK).
Download or read book Polarization Dynamics In Nuclear And Particle Physics Proceedings Of The 2nd Adriatico Research Conference written by Asim Orhan Barut and published by World Scientific. This book was released on 1993-12-22 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the four years since the first Trieste Meeting on Spin and Polarization Dynamics in Nuclear and Particle Physics, considerable progress has been made both in the theoretical and experimental aspects of this field. The polarization phenomena have given rise to many more detailed and crucial tests which enhance our understanding of particle physics. New information can also be uncovered in the process of conducting the various tests. For this reason, considerable efforts have been put into the present and future accelerators to extend the experimental data to measure polarization asymmetries for both polarized targets and polarized scattered and produced particles. The 2nd Adriatico Research Conference held in January 1992 brought together both theorists and experimentalists who presented many new findings. These findings have been compiled into this compact volume to give a complete picture of the wide range of theoretical and experimental problems, difficulties, results, prospects and hopes which are at the core of particle physics studies today. It will be a useful guide for the present status of polarization phenomena and their fundamental implications.
Download or read book Quantum Chromodynamics Proceedings Of The Fifth Workshop written by Herbert Martin Fried and published by World Scientific. This book was released on 2000-11-21 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Basic Concepts and Consequences of Stochastic Vacuum Model (H G Dosch)Variational Approximations for Correlation Functions in Quantum Field Theories (C Martin)SU(2) Gauge Theory in Covariant (Maximal) Abelian Gauges (M Schaden)The Vacuum Wave Function in Supersymmetric Matrix Theory (C M Sommerfield)HERA Results on Elastic Hadronic and Sub-Hadronic Diffraction (G Knies)Deriving Effective Transport Equations for Non-Abelian Plasmas (D F Litim)Aspects of Non-Commutativity in ADS/CFT (A Jevicki)Thermal Field Theory in Equilibrium (J O Andersen)Puzzling Aspects of Hot Quantum Fields (T Grandou)DIS Results from HERA (C M Ginsburg)Electroproduction of Vector Mesons (T Teubner)New Developments in Cosmology (J W Moffat)Heavy-Light Physics from Lattice NRQCD (T Onogi)Non-Relativistic Effective Theory for Perturbative Heavy Quark-Antiquark Systems (A H Hoang)The Spin Dependence of Swift Proton Collisions (N H Buttimore)Numerical Investigation of Domain-Wall QCD on CP-PACS (S Aoki)When is It Possible to Use Perturbation Technique in Field Theory? (T N Truong)and other papers Readership: Researchers in high energy physics. Keywords:
Download or read book Lectures on Lepton Nucleon Scattering and Quantum Chromodynamics written by ATWOOD and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 571 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Intrinsic Short distance Structure of Hadrons in QCD written by and published by . This book was released on 1990 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A central problem of particle physics is to determine the composition of hadrons in terms of their fundamental quark and gluon degrees of freedom. The structure of hadronic bound-states in quantum chromodynamics plays a role in virtually every aspect of high energy and weak interaction phenomenology, including jet hadronization, heavy particle production processes at colliders, general exclusive and inclusive reactions, and electro-weak decay matrix-elements. Although the QCD Lagrangian has an elegant simplicity, the structure of its bound state solutions can be extraordinarily rich and complex. In these lectures I will focus on QCD phenomena which reflect the coherence and composition of hadron wave functions as relativistic many--body systems of quark and gluon quanta. 83 refs.
Download or read book The Sixth Quark written by Patricia M. McDonough and published by . This book was released on 1985 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantum Chromodynamics written by Walter Greiner and published by Springer Science & Business Media. This book was released on 2011-06-28 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum Chromodynamics is a thorough introduction for students in theoretical physics and scientists needing a reference and exercise book in this field. The book presents the necessary mathematical tools together with many examples and worked problems. In introductory chapters the reader becomes familiar with the hadron spectrum, while the SU(N) symmetry groups and the relativistic field theory are briefly recapitulated; then a discussion of scalar quantum electrodynamics and scattering reactions follow before gauge quark-quark interactions, perturbational QCD, renormalization groups, and tests of pertubational QCD are all treated in detail. Chapters on non-perturbational QCD and quasi-phenomenological applications conclude the text.
