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Author : A. Radyushkin
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (898 download)
Download or read book Quark-hadron Duality and Intrinsic Transverse Momentum written by A. Radyushkin and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 2067 pages
Book Rating : 4.:/5 (727 download)
Download or read book Quark-Hadron Duality and Intrinsic Transverse Momentum written by and published by . This book was released on 1995 with total page 2067 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is demonstrated in several exclusive processes involving the pion that a local quark-hadron duality prescription is equivalent to using an effective (bar)qq (two-body) light-cone wave function Psi (sup) (LD) (x, k (sub)perpendicular) for the pion. This wave function models soft dynamics of all higher (bar)qG ... Gq Fock components of the standard light-cone approach. Contributions corresponding to higher Fock components in a hard regime appear in this approach as radiative corrections and are suppressed by powers of alpha(sub)s / Pi.
Author : Alessandra Fantoni
Publisher : World Scientific
ISBN 13 : 9812566848
Total Pages : 298 pages
Book Rating : 4.8/5 (125 download)
Download or read book Proceedings of the First Workshop on Quark-Hadron Duality and Transition to PQCD written by Alessandra Fantoni and published by World Scientific. This book was released on 2006 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. Contents: Introduction and Review: Experimental and Theoretical Status: Duality in the Polarized Structure Functions (H 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 Thomas); Spin-Flavor Decomposition and Duality in Polarized SIDIS (X Jiang); Hadron Structure on the Back of an Envelope (A Thomas); Duality in Photoproduction: Duality in Vector Meson Production (A Donnachie); Onsef 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: Local Duality and Charge Symmetry Violation (F Steffens); Duality and QCD: Higher Twist Effects in Polarized DIS (D Stamenov); Quark-Hadron Duality and High Excitations (M Shifman); Highly Excited Hadrons in QCD and Beyond (M Shifman); Future Perspectives: Transverse Polarization and Quark-Hadron Duality (O Teryaev); Research Perspectives with the Jefferson Lab (K de Jager); Perspectives with PANDA (P Gianotti); Summary Talk (P Hoyer); Transverse Polarization and Quark Gluon Duality (O Teryaev); and other papers. Readership: Researchers, academics and lecturers in high energy, particle and nuclear physics.
Author : Simonetta Liuti
Publisher : World Scientific
ISBN 13 : 9814478490
Total Pages : 298 pages
Book Rating : 4.8/5 (144 download)
Download or read book Quark-hadron Duality And The Transition To Pqcd - Proceedings Of The First Workshop written by Simonetta Liuti and published by World Scientific. This book was released on 2006-02-06 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
ISBN 13 : 9812774130
Total Pages : 298 pages
Book Rating : 4.8/5 (127 download)
Download or read book Proceedings of the First Workshop on Quark-Hadron Duality and Transition to PQCD written by Alessandra Fantoni and published by World Scientific. This book was released on 2006 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : Paolo Bartalini
Publisher : World Scientific Publishing
ISBN 13 : 981322777X
Total Pages : 472 pages
Book Rating : 4.8/5 (132 download)
Download or read book Multiple Parton Interactions at the LHC written by Paolo Bartalini and published by World Scientific Publishing. This book was released on 2018-11-08 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many high-energy collider experiments (including the current Large Hadron Collider at CERN) involve the collision of hadrons. Hadrons are composite particles consisting of partons (quarks and gluons), and this means that in any hadron–hadron collision there will typically be multiple collisions of the constituents — i.e. multiple parton interactions (MPI). Understanding the nature of the MPI is important in terms of searching for new physics in the products of the scatters, and also in its own right to gain a greater understanding of hadron structure. This book aims at providing a pedagogical introduction and a comprehensive review of different research lines linked by an involvement of MPI phenomena. It is written by pioneers as well as young leading scientists, and reviews both experimental findings and theoretical developments, discussing also the remaining open issues.
Author : Paul Stoler
Publisher : World Scientific
ISBN 13 : 9814550906
Total Pages : 306 pages
Book Rating : 4.8/5 (145 download)
Download or read book Exclusive Reactions Of High Momentum Transfer, Proceedings Of The International Workshop written by Paul Stoler and published by World Scientific. This book was released on 1994-06-22 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past decade considerable literature has appeared on the topic of exclusive reactions at high momentum transfer. Two important recent developments offer the possiblity of experimentally testing the theoretical ideas in a systematic way. These are the potential CEBAF energy upgrades and the proposed 15 - 30 GeV European Electron Accelerator, ELFE.This volume records the state-of-the-art in studying exclusive reactions at high momentum transfers and establishes a common body of knowledge to be shared by all. There is some emphasis on the use of perturbative calculations to connect hadron structure to experimental measureables and other topics, including color transparency, the use of QCD sum rules and experiemental data.
Download or read book Intrinsic Transverse Momentum and Dynamical Chiral Symmetry Breaking written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We study the effect of QCD vacuum structure on the intrinsic transverse momentum distribution of partons in the nucleon at a low scale. The dynamical breaking of chiral symmetry is caused by non-perturbative interactions at distances of the order rho ̃0.2 - 0.3 fm, much smaller than the typical nucleon size R ̃1 fm, resulting in a two-scale picture of nucleon structure. Using an effective dynamical model based on chiral constituent quark degrees of freedom and the 1/N_c expansion (chiral quark-soliton model), we calculate the transverse momentum distribution of quarks and antiquarks at a low scale. The distribution of valence quarks is localized at p_T ̃1/R. The distribution of flavor-singlet unpolarized sea quarks exhibits a power-like tail extending up to the chiral-symmetry-breaking scale 1/?. A similar tail is present in the flavor-nonsinglet polarized sea. These features are model-independent and represent the imprint of the QCD vacuum on the nucleon's partonic structure. At the level of the nucleon's light-cone wave function, we show that sea quarks partly exist in correlated pairs of transverse size? “R, analogous to short-range NN correlations in nuclei. We discuss the implications of our findings for the transverse momentum distributions in hard scattering processes (semi-inclusive DIS, Drell-Yan pair production) and possible experimental tests of the non-perturbative parton correlations induced by QCD vacuum structure.
Download or read book Lepton Scattering and Quark-Hadron Duality Studies at Jefferson Lab written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: At high enough energies asymptotic freedom guarantees the deep inelastic scattering cross sections to be calculated as nearly free electron-quark scattering. However, confinement guarantees that the experimentally observed final states particles are hadrons. Low-energy quark hadron duality suggests that the hadronic cross sections, when averaged over an appropriate energy range, nevertheless coincide with the naive leading-twist quark-gluon calculations. Deep inelastic inclusive scattering shows that scaling at modest Q2 and v already arises from very few resonance channels. This is reflected by the striking agreement (10%) between data in the nucleon resonance region and the deep inelastic (W24GeV2) region for the Q2>0.5 (GeV/c)2, known as the Bloom-Gilman duality. Electron-hadron scattering allows for further investigation of quark-hadron duality by virtue of its ability to select resonances, by tagging with either spin or flavor.
Download or read book Exclusive Processes at Intermediate Energy, Quark-hadron Duality and the Transition to Perturbative QCD. written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author :
Publisher :
ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.X/5 (2 download)
Download or read book Acta Physica Polonica written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quark-Hadron Duality and Scaling in Reduced QCD. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We introduce a generalization of 1+1 dimensional large N{sub c} QCD, which we refer to as ''reduced'' QCD, or rQCD. In this model gluons and quark momenta live in 1+1 dimensions only, but the quark spin and all other particles (leptons, and the photon) live in the full 1 + 3 dimensions. The bound states of quarks and antiquarks are identical to those originally described by 't Hooft (except that there are new transversely polarized states previously excluded), so the model is exactly soluble. However, significant differences arise when the model is applied to electromagnetic interactions. After reviewing the strongly interacting sector of the theory, we discuss deep inelastic scattering (DIS) in this model, and show that the new states with transverse polarization give the Callan-Gross relation and remove the pathological features of the original 1+1 dimensional description. We conclude that rQCD gives a satisfactory description of the phenomenology and provides a deep understanding of both duality and DIS.
Author : Jorge Casalderrey-Solana
Publisher : Cambridge University Press
ISBN 13 : 1107782813
Total Pages : 467 pages
Book Rating : 4.1/5 (77 download)
Download or read book Gauge/String Duality, Hot QCD and Heavy Ion Collisions written by Jorge Casalderrey-Solana and published by Cambridge University Press. This book was released on 2014-06-19 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heavy ion collision experiments recreating the quark-gluon plasma that filled the microseconds-old universe have established that it is a nearly perfect liquid that flows with such minimal dissipation that it cannot be seen as made of particles. String theory provides a powerful toolbox for studying matter with such properties. This book provides a comprehensive introduction to gauge/string duality and its applications to the study of the thermal and transport properties of quark-gluon plasma, the dynamics of how it forms, the hydrodynamics of how it flows, and its response to probes including jets and quarkonium mesons. Calculations are discussed in the context of data from RHIC and LHC and results from finite temperature lattice QCD. The book is an ideal reference for students and researchers in string theory, quantum field theory, quantum many-body physics, heavy ion physics and lattice QCD.
Author : Rolf Ent
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)
Download or read book Experimental Overview of Quark-hadron Duality in Electron Scattering written by Rolf Ent and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book L'Italia rigenerata. Ballo erocco pantomimo in quattro atti, composto da Filippo Beretti written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Wally Melnitchouk
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (316 download)
Download or read book Quark-hadron Duality in Electron-nucleon Scattering written by Wally Melnitchouk and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 39 pages
Book Rating : 4.:/5 (16 download)
Download or read book Transverse Momentum Resummation for Top Quark Pairs Production at Hadron Collider written by and published by . This book was released on 2013 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
