Nstar 2001 : Proceedings of the Workshop on the Physics of Excited Nucleons Mainz, Germany 7-10 March 2001.
Title:
Nstar 2001 : Proceedings of the Workshop on the Physics of Excited Nucleons Mainz, Germany 7-10 March 2001.
Author:
Drechsel, D.
ISBN:
9789812810878
Personal Author:
Physical Description:
1 online resource (528 pages)
Contents:
CONTENTS -- Organization -- Foreword -- Nucleon Resonances in the Quark Model -- 1 Introduction -- 2 Effective Degrees of Freedom -- 3 Confining Interaction -- 4 Residual Interactions -- 5 Lattice Results -- 6 Hybrid Baryons -- 7 Effects of Decay Channel Couplings -- 8 Describing Reactions Using the Quark Model -- 9 Summary -- Acknowledgments -- References -- Quadrupole Strength in the N -> A Transition -- 1 Introduction -- 2 Theoretical Developments -- 3 The Bates y* N -> A Program -- 4 Future Prospects and Acknowledgments -- References -- Pion Electroproduction at ELSA -- 1 Introduction -- 2 Neutron Identification -- 3 First Results -- References -- TT0 Electroproduction in the A(1232) Region at MAMI -- 1 Introduction -- 2 Results of the p(e e'p)TT0 Experiment -- 3 Forward and Backward LT-Asymmetry in p(e e'p)TT0 -- 4 Fifth Structure Function in p(e e'p)TT0 -- 5 Summary -- Acknowledgements -- References -- Pion Electroproduction Using CLAS -- 1 Introduction -- References -- Recoil Polarization Measurements in TT0 Electroproduction at the Peak of the A(1232) -- 1 Introduction -- 2 Measurement Philosophy: Exploiting Hall A's Tools -- 3 Specific Measurements for E91-011 -- 4 Accessible Responses and Expected Sensitivity to S1+. -- 5 Data Analysis - Sample Spectra -- 6 Conclusions/Outlook -- Acknowledgments -- References -- Chiral Effective Field Theories with Explicit Spin 3/2 Degrees of Freedom - A Status Report -- 1 Introduction -- 2 Chiral Calculations and Power Counting -- 3 Anomalous Magnetic Moments of the Nucleon -- 4 Isovector Form Factors of the Nucleon -- 5 Isovector Nucleon-Delta Transition Form Factors -- 6 Summary -- Acknowledgments -- References -- Dynamical Meson-Baryon Resonances with Chiral Lagrangians -- 1 Introduction -- 2 Meson-Baryon Scattering in Coupled Channels.
3 Strangeness S = -1 Sector -- 4 Strangeness S = 0 Sector -- 5 Strangeness S = -2 Sector -- 6 Conclusions -- Acknowledgments -- References -- Chiral Lagrangians with Resonances -- 1 Chiral Symmetry -- 2 Elastic TTN Scattering and Unitarization -- 3 Coupled Channel NK Scattering -- 4 Conclusions -- Acknowledgments -- References -- Pion Photo- and Electroproduction in Dynamical Model -- 1 Introduction -- 2 Effective Hamiltonian and Electromagnetic Current -- 3 Pion Photoproduction and Electroproduction -- 4 Summary -- Acknowledgments -- References -- Recent Developments in the Dynamical and Unitary Isobar Models for Pion Electromagnetic Production -- 1 Introduction -- 2 Formalism -- 3 Pion Photo- and Electroproduction in the A(1232) Region -- 4 Threshold TT0 Photoproduction -- 5 Threshold TT0 Electroproduction -- 6 Conclusion -- References -- Two Pion Production in the Jiilich Model -- 1 Introduction -- 2 The Model -- 3 Results -- 4 Summary -- Acknowledgments -- References -- Update on Partial-Wave Analysis -- 1 Overview -- 2 Near-Threshold Studies -- 3 Fitting the Full Resonance Region -- 4 Conclusions and Further Questions -- Acknowledgments -- References -- Nucleon Resonance Properties in Multichannel Approaches -- 1 Introduction -- 2 Coupled-channels Analyses -- 3 Results and Discussion -- 4 Conclusions and Outlook -- Acknowledgments -- References -- Variation of Hadron Structure with Quark Mass -- 1 Introduction -- 2 Electromagnetic Form Factors -- 3 Structure Functions -- Acknowledgments -- References -- The Role of the Pion in Nucleon Resonance Structure -- 1 Pion Coupling to Constituent Quarks -- 2 Model Calculations of Resonance Decay Widths -- 3 Pion Decays of D-Mesons -- 4 Conclusion -- Acknowledgments -- References -- Relativistic Quark Models -- 1 Introduction.
2 Relativistic Constituent Quark Models -- 3 Nucleon Elastic Form Factors and the N - P11(1440) Transition -- 4 Conclusions -- References -- Generalized Polarizabilities in a Constituent Quark Model -- 1 Introduction -- 2 Compton Tensor and Low-Energy Theorem -- 3 Generalized Polarizabilities and their Interpretation -- 4 Compton Tensor in a Nonrelativistic Framework -- 5 Generalized Polarizabilities in a Constituent Quark Model -- 6 Results -- 7 Summary -- Acknowledgments -- References -- Nucleon Properties in the Perturbative Chiral Quark Model -- 1 Introduction -- 2 Perturbative Chiral Quark Model -- 3 Results -- Acknowledgments -- References -- The Glasgow Pion Photoproduction Partial Wave Analysis 2001 -- 1 Introduction -- 2 The Analysis -- 3 Results -- 4 Conclusions -- References -- Residues of the Multipole Amplitudes M3/2 1+ E3/2 1+ at the t-Matrix Pole Found in the Framework of Dispersion Relations -- 1 Introduction -- 2 Reducing of Dispersion Relations for M3/2 1+ E3/2 1+ to Integral Equations and the Solution of these Equations -- References -- An Isobar Model for n Photo- and Electroproduction on the Nucleon -- 1 Introduction -- 2 Isobar Model -- 3 Results and Discussion -- Acknowledgments -- References -- Detailed Analysis of n Production in Proton-Proton Collisions -- References -- Phenomenological Analysis of N* Excitation in Charged Double Pion Production -- 1 Introduction -- 2 Model Description -- 3 Real Photon -- 4 Virtual Photons -- References -- Results on A(1232) Resonance Parameters: A New TTN Partial Wave Analysis -- 1 Determination of Resonance Parameters from Speed Plots -- 2 The Background in the P33 Partial Wave -- 3 An Updated Version of the KH80 Partial Wave Analysis -- Acknowledgments -- References -- Solving the Puzzle of the yp -> TT+TT0n Reaction -- 1 Introduction -- 2 Formalism.
3 Discussion and Results -- 4 Summary -- References -- The Giessen Model - Vector Meson Production on the Nucleon in a Coupled Channel Approach -- 1 Introduction -- 2 The Model -- 3 Results on (Pseudo)scalar Meson Production -- 4 Vector Meson Production -- 5 Outlook -- 6 Acknowledgments -- References -- Multipole Analysis for Pion Photoproduction with MAID and a Dynamical Model -- References -- Model Dependence of E2/M1 -- 1 Introduction -- 2 The Participants and their Models -- 3 Results -- Acknowledgments -- References -- Eta Photoproduction in a Coupled-Channels Approach -- 1 Introduction -- 2 Low-Energy Region: S11(1535) and D13(1520) -- 3 Intermediate-Energy Region: S11(1650) and D13(1700) -- Acknowledgments -- References -- Electroweak Properties of Baryons in a Covariant Chiral Quark Model -- References -- Low Lying qqqqq States in the Baryon Spectrum -- 1 Introduction -- 2 The qqqqq System -- 3 Summary -- References -- Parity Doublets from a Relativistic Quark Model -- References -- A Dispersion Theoretical Approach to Virtual Compton Scattering off the Proton -- References -- Neutron Charge Form Factor and Quadrupole Deformation of the Nucleon -- References -- The Ground and Radial Excited States of the Nucleon in a Relativistic Schodinger-Type Model -- References -- Vector Meson Photoproduction in the Quark Model -- 1 Introduction -- 2 Analysis -- Acknowledgments -- References -- Status of Nucleon Resonances with Masses M yA -- References -- Structure of the Roper Resonance from a-Proton and TT-Nucleon Scattering -- 1 Introduction.
2 T-Matrix Description of TT-N and a-p Scattering -- 3 Comparison with y-N -- References -- Structure of the Nucleon Investigated by Compton Scattering -- References -- Virtual Compton Scattering at Jefferson Lab: Preliminary Results in the Polarizability Domain at Q2 = 1 and 1.9 GeV2 -- 1 Virtual Compton Scattering -- 2 Virtual Compton Scattering at Jefferson Laboratory. -- 3 Preliminary Results for Cross Sections -- References -- Measurement of the Cross Section Asymmetry E for yp -> TT0p over the Range Ey = 0.5 - 1.1 GeV -- 1 Introduction -- 2 Experiment and Data Analysis -- 3 Results and Discussion -- Acknowledgments -- References -- Positive Pion Photoproduction and Compton Scattering at GRAAL -- References -- Virtual Compton Scattering and Pion Electroproduction in the Nucleon Resonance Region -- 1 Introduction -- 2 Experimental Considerations -- 3 Pion Electroproduction -- 4 Virtual Compton Scattering (VCS) -- 5 Conclusion -- References -- Single Spin Beam Asymmetry Measurements from Single TT0 Electroproduction in the A(1232) Resonance Region -- 1 Introduction -- 2 Data Analysis and Results -- References -- The New Crystal Ball Experimental Program -- 1 Introduction -- 2 Experimental Considerations -- 3 Results -- 4 Acknowledgments -- Observation of n-Mesic Nuclei in Photoreactions: Results and Perspectives -- Acknowledgment -- References -- Baryon Spectroscopy: Experiments at PNPI -- 1 Study of TT-p Charge Exchange Scattering in the Region of Low-Lying Pion-Nucleon Resonances -- 2 Measurement of the Spin Rotation Parameters for TT+p Elastic Scattering in the Second Resonance Region -- References.
Measurement of the Cross Section Asymmetry in Deuteron Photodisintegration by Linearly Polarized Photons in the Energy Range Er = 0.8 - 1.6 GeV.
Abstract:
The study of N ∗ s can provide us with critical insights into the nature of QCD in the confinement domain. The keys to progress in this domain are the identification of its important degrees of freedom and the effective forces between them. The nucleon is the simplest system in which the nonabelian character of QCD is manifest. There are N c quarks in a baryon because there are N c colors, and as a consequence Gell-Mann and Zweig were forced to introduce the quarks in order to describe the octet and decuplet baryons. This volume gives a status report on the recent experimental and theoretical results in the field of nucleon resonance physics. A wealth of new high precision data was presented from facilities around the world, such as BES, BNL, ELSA, GRAAL, JLab, MAMI, MIT/Bates, SPring8, and Yerevan. Particular emphasis was laid on polarization degrees of freedom and large acceptance detectors as precision tools for studying small but important transition amplitudes, and the helicity (spin) structure of the nucleon. There were new results describing the nucleon resonance structure on the basis of quantum chromodynamics, either directly in terms of quarks and gluons by means of lattice gauge theory, or in terms of hadrons in the framework of chiral field theories. A status report on duality showed the surprising connections between the physics of the low energy nucleon resonance region and the realm of quark structure functions in deep inelastic scattering. Finally, this volume contains a summary report of the BRAG workshop, devoted to the analysis of baryon resonances. Contents: Nucleon Resonances in the Quark Model (S Capstick); Recent Developments in the Dynamical and Unitary Isobar Models for Pion Electromagnetic Production (S N Yang et al.); The Role of the Pion in Nucleon Resonance Structure (D-O Riska); Generalized Polarizabilities in a
Constituent Quark Model (S Scherer et al.); Multipole Analysis for Pion Photoproduction with MAID and a Dynamical Model (S S Kamalov et al.); Electroweak Properties of Baryons in a Covariant Chiral Quark Model (S Boffi); Neutron Charge Form Factor and Quadrupole Deformation of the Nucleon (A J Buchmann); Vector Meson Photoproduction in the Quark Model (Q Zhao); The New Crystal Ball Experimental Program (W J Briscoe); Lattice Study of Nucleon Properties with Domain Wall Fermions (S Sasaki); and other papers. Readership: Graduate students, researchers and academics in high energy and nuclear physics.
Local Note:
Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2017. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.
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