Quark Hadron Duality And The Transition To Pqcd
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| Author | : Simonetta Liuti |
| Publisher | : World Scientific |
| Total Pages | : 298 |
| Release | : 2006-02-06 |
| Genre | : Science |
| ISBN | : 9814478490 |
Download Quark-hadron Duality And The Transition To Pqcd - Proceedings Of The First Workshop Book in PDF, Epub and Kindle
While perturbative QCD methods fully describe experimental results at high energies, and chiral perturbation theory is the low energy effective theory of the strong interactions, a form of duality is observed connecting these two regimes. In these intermediate kinematics, a wide variety of reactions are observed which can be described simultaneously by single particle (quark) scattering, and by exclusive resonance (hadron) scattering.The contributions in this proceedings volume discuss recent and existing results, and aim to foster current and future research, investigating the phenomenon of quark-hadron duality.This unique volume contains research work by scientists from different arenas of hadronic physics, dealing with different manifestations of quark-hadron duality.
| Author | : Alessandra Fantoni |
| Publisher | : World Scientific |
| Total Pages | : 298 |
| Release | : 2006 |
| Genre | : Science |
| ISBN | : 9812774130 |
Download Proceedings of the First Workshop on Quark-Hadron Duality and Transition to PQCD Book in PDF, Epub and Kindle
While perturbative QCD methods fully describe experimental results at high energies, and chiral perturbation theory is the low energy effective theory of the strong interactions, a form of duality is observed connecting these two regimes. In these intermediate kinematics, a wide variety of reactions are observed which can be described simultaneously by single particle (quark) scattering, and by exclusive resonance (hadron) scattering. The contributions in this proceedings volume discuss recent and existing results, and aim to foster current and future research, investigating the phenomenon of quark-hadron duality. This unique volume contains research work by scientists from different arenas of hadronic physics, dealing with different manifestations of quark-hadron duality. Sample Chapter(s). Chapter 1: Introductory Remarks on Duality in Lepton-Hadron Scattering (490 KB). Contents: Introduction and Review: Experimental and Theoretical Status: Duality in the Polarized Structure Functions (H P Blok); Spin Structure of the Nucleon and Aspects of Duality (Z E Meziani); Duality and Confinement: Quark Models of Duality in Electron and Neutrino Scattering (W Melnitchouk); Hadron Structure on the Back of an Envelope (A W Thomas et al.); Spin-Flavor Decomposition and in Polarized Semi-Inclusive Deep Inelastic Scattering Experiments at Jefferson Lab (X Jiang); Duality in Photoproduction: Duality in Vector-Meson Production (A Donnachie); Onset of Scaling in Exclusive Processes (M Mirazita); Duality in Nuclei: A Partonic Picture of Jet Fragmentation in Nuclei (X-N Wang); Quark Gluon Plasma and Hadronic Gas on the Lattice (M P Lombardo); Duality in Neutrino Experiments: Neutrinos and Local Duality (F Steffens & K Tsushima); Duality and QCD: Higher Twist Effects in Polarized DIS (E Leader et al.); Highly Excited Hadrons in QCD and Beyond (M Shifman); Future Perspectives: Transverse Polarization and Quark-Hadron Duality (O V Teryaev); Research Perspectives with the Jefferson Lab (K de Jager); Perspectives with PANDA (P Gianotti); Summary Talk (P Hoyer); and other papers. Readership: Researchers, academics and lecturers in high energy, particle and nuclear physics.
| Author | : Alessandra Fantoni |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2006 |
| Genre | : Hadrons |
| ISBN | : 9789812774132 |
Download Quark-Hadron Duality and the Transition to Pqcd Book in PDF, Epub and Kindle
While perturbative QCD methods fully describe experimental results at high energies, and chiral perturbation theory is the low energy effective theory of the strong interactions, a form of duality is observed connecting these two regimes. In these intermediate kinematics, a wide variety of reactions are observed which can be described simultaneously by single particle (quark) scattering, and by exclusive resonance (hadron) scattering. The contributions in this proceedings volume discuss recent and existing results, and aim to foster current and future research, investigating the phenomenon of.
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| Release | : 1998 |
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Download Exclusive Processes at Intermediate Energy, Quark-hadron Duality and the Transition to Perturbative QCD. Book in PDF, Epub and Kindle
Experiments at CEBAF will scan the intermediate-energy region of the QCD dynamics for the nucleon form factors and for Compton Scattering. These experiments will definitely clarify the role of resumed perturbation theory and of quark-hadron duality (QCD sum rules) in this regime. With this perspective in mind, the authors review the factorization theorem of perturbative QCD for exclusive processes at intermediate energy scales, which embodies the transverse degrees of freedom of a parton and the Sudakov resummation of the corresponding large logarithms. They concentrate on the pion and proton electromagnetic form factors and on pion Compton scattering. New ingredients, such as the evolution of the pion wave function and the complete two-loop expression of the Sudakov factor, are included. The sensitivity of their predictions to the infrared cutoff for the Sudakov evolution is discussed. They also elaborate on QCD sum rule methods for Compton Scattering, which provide an alternative description of th is process. They show that, by comparing the local duality analysis to resumed perturbation theory, it is possible to describe the transition of exclusive processes to perturbative QCD.
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Download L'Italia rigenerata. Ballo erocco pantomimo in quattro atti, composto da Filippo Beretti Book in PDF, Epub and Kindle
| Author | : Paul Hoyer |
| Publisher | : Springer Nature |
| Total Pages | : 172 |
| Release | : 2021-08-14 |
| Genre | : Science |
| ISBN | : 303079489X |
Download Journey to the Bound States Book in PDF, Epub and Kindle
This book is a graduate-level self-study guide of bound states in elementary particle physics and consequently in the standard model. The author first recalls the usual quantum electrodynamics (QED) approach to atoms in terms of Feynman diagrams, which assume free states at asymptotic times. Motivated by general principles and data, he then develops a novel method based on a Fock expansion of bound states in temporal gauge. The properties of relativistic bound states are discussed for Dirac states, atoms in motion, QED in D=1+1 dimensions, and hadrons in quantum chromodynamics (including color confinement). This book provides complementary material for quantum field theory courses and is accessible for graduate students and more senior researchers.
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| Release | : 2002 |
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Download Quark-hadron Duality in Electron-nucleon Scattering Book in PDF, Epub and Kindle
Quark-hadron duality addresses some of the most fundamental issues in strong interaction physics, in particular the nature of the transition from perturbative to nonperturbative QCD. In this talk I summarize recent developments in quark-hadron duality in lepton-hadron scattering, and outline how duality can be studied at future high-luminosity facilities such as the electron-ion collider. In its broadest form, quark-hadron duality postulates that physical quantities calculated in a quark-gluon basis should be identical to those evaluated in a hadronic basis. The phenomenon of duality shows up in many physical processes, such as ee− annihilation into hadrons, or semi-leptonic decays of heavy mesons. One of the more intriguing examples, initially observed some 30 years ago by Bloom and Gilman [1], is in inclusive inelastic electron-nucleon scattering.
| Author | : A. V. Radyushkin |
| Publisher | : World Scientific |
| Total Pages | : 453 |
| Release | : 2008 |
| Genre | : Science |
| ISBN | : 9812796959 |
Download Exclusive Reactions at High Momentum Transfer Book in PDF, Epub and Kindle
Exclusive reactions are becoming one of the major sources of information about the deep structure of nucleons and other hadrons. The 2007 International Workshop held at Jefferson Lab in Newport News, Virginia, USA - the world's leading facility performing research on nuclear, hadronic and quark-gluon structure of matter - focused on the application of a variety of exclusive reactions at high momentum transfer, utilizing unpolarized and polarized beams and targets, to obtain information about nucleon ground-state and excited-state structure at short distances. This is a subject which is central to the programs of current accelerators and especially planned future facilities. This proceedings volume contains, in concentrated form, information about the newest developments, both theoretical and experimental, in the study of hard exclusive reactions.
| Author | : Anatoly Radyushkin |
| Publisher | : World Scientific |
| Total Pages | : 453 |
| Release | : 2008-03-13 |
| Genre | : Science |
| ISBN | : 9814471518 |
Download Exclusive Reactions At High Momentum Transfer - Proceedings Of The International Workshop Book in PDF, Epub and Kindle
Exclusive reactions are becoming one of the major sources of information about the deep structure of nucleons and other hadrons. The 2007 International Workshop held at Jefferson Lab in Newport News, Virginia, USA — the world's leading facility performing research on nuclear, hadronic and quark-gluon structure of matter — focused on the application of a variety of exclusive reactions at high momentum transfer, utilizing unpolarized and polarized beams and targets, to obtain information about nucleon ground-state and excited-state structure at short distances. This is a subject which is central to the programs of current accelerators and especially planned future facilities.This proceedings volume contains, in concentrated form, information about the newest developments, both theoretical and experimental, in the study of hard exclusive reactions.
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| Total Pages | : |
| Release | : 2005 |
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Download Quark-Hadron Duality Book in PDF, Epub and Kindle
I review recent developments in the study of quark-hadron duality in inclusive electron scattering in the resonance-scaling transition region. Results on matrix elements of twist-4 operators extracted from moments of the spin-dependent g1 structure function suggest that duality violating higher twists are small above Q2 (almost equal to) 1 GeV2. The systematics of the x dependence of local duality are analyzed within a quark model framework, and mechanisms are identified for spin-flavor symmetry breaking which underpin the behavior of structure functions at large x.
