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A Gauge Invariant Multipole Expansion Scheme For Heavy Quark Systems In Quantum Chromodynamics
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Book Synopsis A GAUGE-INVARIANT MULTIPOLE EXPANSION SCHEME FOR HEAVY-QUARK SYSTEMS IN QUANTUM CHROMODYNAMICS. by :
Download or read book A GAUGE-INVARIANT MULTIPOLE EXPANSION SCHEME FOR HEAVY-QUARK SYSTEMS IN QUANTUM CHROMODYNAMICS. written by and published by . This book was released on 1980 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Separation of short-distance and long-distance dynamics for heavy quark-antiquark systems interacting with color gluons is investigated through a classification of gluons according to their ranges. A gauge-invariant double-multipole expansion scheme is constructed which takes into account color fluctuation of heavy-quark systems. Hadronic transitions between heavy quark-antiquark bound states as well as the static quark-antiquark potential are studied within this framework.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1981 with total page 1740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantum Chromodynamics - Proceedings Of The Fifth Workshop by : Herbert Martin Fried
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:
Book Synopsis Gauge Invariant Description of Heavy Quark Bound States in Quantum Chromodynamics by :
Download or read book Gauge Invariant Description of Heavy Quark Bound States in Quantum Chromodynamics written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A model for a heavy quark meson is proposed in the framework of a gauge-invariant version of quantum chromodynamics. The field operators in this formulation are taken to be Wilson loops and strings with quark-antiquark ends. The fundamental differential equations of point-like Q.C.D. are expressed as variational equations of the extended loops and strings. The 1/N expansion is described, and it is assumed that nonleading effects such as intermediate quark pairs and nonplanar gluonic terms can be neglected. The action of the Hamiltonian in the A0 = 0 gauge on a string operator is derived. A trial meson wave functional is constructed consisting of a path-averaged string operator applied to the full vacuum. A Gaussian in the derivative of the path location is assumed for the minimal form of the measure over paths. A variational parameter is incorporated in the measure as the exponentiated coefficient of the squared path location. The expectation value of the Hamiltonian in the trial state is evaluated for the assumption that the negative logarithm of the expectation value of a Wilson loop is proportional to the loop area. The energy is then minimized by deriving the equivalent quantum mechanical Schroedinger's equation and using the quantum mechanical 1/n expansion to estimate the effective eigenvalues. It is found that the area law behavior of the Wilson loop implies a nonzero best value of the variational parameter corresponding to a quantum broadening of the flux tube.
Book Synopsis Soft-Gluon Dynamics for Heavy Quark-Antiquark Systems by :
Download or read book Soft-Gluon Dynamics for Heavy Quark-Antiquark Systems written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction of a heavy quark-antiquark system with color gluons is classified according to the gluon energy, and a manifestly gauge-invariant multipole expansion scheme is constructed. This multipole expansion has useful applications to the study of hadronic transitions between heavy-quark-antiquark bound states, the static quark-antiquark potential and the nonperturbative structure of the gluonic vacuum.
Book Synopsis Gauge Invariant Description of Heavy Quark Bound States in Quantum Chromodynamics by : Susan Elma Moore
Download or read book Gauge Invariant Description of Heavy Quark Bound States in Quantum Chromodynamics written by Susan Elma Moore and published by . This book was released on 1980 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 研究者・研究課題総覧 1984: Shizen kagaku hen by :
Download or read book 研究者・研究課題総覧 1984: Shizen kagaku hen written by and published by . This book was released on 1984 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1993 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindex written by and published by . This book was released on 1988 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heavy Quark Effective Theory by : Andrey G. Grozin
Download or read book Heavy Quark Effective Theory written by Andrey G. Grozin and published by Springer Science & Business Media. This book was released on 2004-04-07 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date review also serves as an introduction to Heavy Quark Effective Theory (HQET) - a new approach to heavy quark physics problems in Quantum Chromodynamics (QCD). The book also contains a detailed discussion of the methods of calculation used in HQET, along with numerous illustrations.
Book Synopsis Parton Densities in Quantum Chromodynamics by : Igor O. Cherednikov
Download or read book Parton Densities in Quantum Chromodynamics written by Igor O. Cherednikov and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The book consists of six chapters. In Introduction we briefly discuss the conceptual issues inherent to the theory of strong interaction in the high energy regime and present the motivation to the use of parton density functions within the QCD factorization framework. In Chapter 2 we introduce particle number functions in general form. We show how the normal-, time-, and path-ordering operations make the multiple products of local quantum operators well-defined, and how Wick's theorems enable practical calculations of quantum correlation functions. Chapter 3 outlines geometrical approach to the construction of a general nonabelian gauge field theory. The idea of local gauge invariance is used to derive a Wilson line as a parallel transporter associated to field operators defined in different space-time points. In Chapter 4 we give a detailed description of the properties of piecewise linear finite and infinite Wilson lines and present the basis for a new methodology of perturbative calculations with such Wilson lines. Chapter 5 is devoted to the principles of gauge-invariant path-dependent parton density functions (PDFs), which are intrinsic to QCD factorization approaches to the analysis of fully inclusive and semi-inclusive hadronic processes at high energy. We discuss geometrical structure of the Wilson lines which make the PDFs gauge-invariant, paying special attention to the operator definition of transverse momentum dependent PDFs and their evolution"...
Book Synopsis Heavy-quark Physics in Quantum Chromodynamics by :
Download or read book Heavy-quark Physics in Quantum Chromodynamics written by and published by . This book was released on 1991 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heavy quarks can expose new symmetries and novel phenomena in QCD not apparent in ordinary hadronic systems. In these lectures I discuss the use of effective-Lagrangian and light-cone Fock methods to analyze exclusive heavy hadron decays such as [Upsilon] → p{bar p} and B → [pi][pi], and also to derive effective Schroedinger and Dirac equations for heavy quark systems. Two contributions to the heavy quark structure functions of the proton and other light hadrons are identified: an extrinsic'' contribution associated with leading twist QCD evolution of the gluon distribution, and a higher twist intrinsic'' contribution due to the hardness of high-mass fluctuations of multi-gluon correlations in hadronic wavefunctions. A non-perturbative calculation of the heavy quark distribution of a meson in QCD in one space and one time is presented. The intrinsic higher twist contributions to the pion and proton structure functions can dominate the hadronic production of heavy quark systems at large longitudinal momentum fraction x{sub F} and give anomalous contributions to the quark structure functions of ordinary hadrons at large x{sub bj}. I also discuss a number of ways in which heavy quark production in nuclear targets can test fundamental QCD phenomena and provide constraints on hadronic wavefunctions. The topics include color transparency, finite formation time, and predictions for charm production at threshold, including nuclear-bound quarkonium. I also discuss a number of QCD mechanisms for the suppression of J/[psi] and [Upsilon] production in nuclear collisions, including gluon shadowing, the peripheral excitation of intrinsic heavy quark components at large x{sub F}, and the coalescence of heavy quarks with co-moving spectators at low x{sub F}.
Book Synopsis Quantum Chromodynamics Near the Confinement Limit by :
Download or read book Quantum Chromodynamics Near the Confinement Limit written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: These nine lectures deal at an elementary level with the strong interaction between quarks and its implications for the structure of hadrons. Quarkonium systems are studied as a means for measuring the interquark interaction. This is presumably (part of) the answer a solution to QCD must yield, if it is indeed the correct theory of the strong interactions. Some elements of QCD are reviewed, and metaphors for QCD as a confining theory are introduced. The 1/N expansion is summarized as a way of guessing the consequences of QCD for hadron physics. Lattice gauge theory is developed as a means for going beyond perturbation theory in the solution of QCD. The correspondence between statistical mechanics, quantum mechanics, and field theory is made, and simple spin systems are formulated on the lattice. The lattice analog of local gauge invariance is developed, and analytic methods for solving lattice gauge theory are considered. The strong-coupling expansion indicates the existence of a confining phase, and the renormalization group provides a means for recovering the consequences of continuum field theory. Finally, Monte Carlo simulations of lattice theories give evidence for the phase structure of gauge theories, yield an estimate for the string tension characterizing the interquark force, and provide an approximate description of the quarkonium potential in encouraging good agreement with what is known from experiment.
Book Synopsis Cumulative Author Index of Physical Review (volumes 23-32) and Physical Review Letters (volumes 46-55) 1981-1985 by :
Download or read book Cumulative Author Index of Physical Review (volumes 23-32) and Physical Review Letters (volumes 46-55) 1981-1985 written by and published by . This book was released on 1986 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Precision Quantum Chromodynamics from Heavy Quark Expansions by : Donald G. Benson
Download or read book Precision Quantum Chromodynamics from Heavy Quark Expansions written by Donald G. Benson and published by . This book was released on 2004 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Two-Loop Scale Dependence of the Static QCD Potential Including Quark Masses by :
Download or read book The Two-Loop Scale Dependence of the Static QCD Potential Including Quark Masses written by and published by . This book was released on 1999 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction potential V(Q2) between static test charges can be used to define an effective charge [alpha]{sub V}(Q2) and a physically-based renormalization scheme for quantum chromodynamics and other gauge theories. In this paper we use recent results for the finite-mass fermionic corrections to the heavy-quark potential at two-loops to derive the next-to-leading order term for the Gell Mann-Low function of the V-scheme. The resulting effective number of flavors N{sub F}(Q2/m2) in the [alpha]{sub V} scheme is determined as a gauge-independent and analytic function of the ratio of the momentum transfer to the quark pole mass. The results give automatic decoupling of heavy quarks and are independent of the renormalization procedure. Commensurate scale relations then provide the next-to-leading order connection between all perturbatively calculable observables to the analytic and gauge-invariant [alpha]{sub V} scheme without any scale ambiguity and a well defined number of active flavors. The inclusion of the finite quark mass effects in the running of the coupling is compared with the standard treatment of finite quark mass effects in the {ovr MS} scheme.
Book Synopsis Gauge Invariant Formulations of Large N Quantum Chromodynamics by : Joseph David Lykken
Download or read book Gauge Invariant Formulations of Large N Quantum Chromodynamics written by Joseph David Lykken and published by . This book was released on 1982 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
