MAID and the GDH sum rule in the resonance region

Slides:

Advertisements

Similar presentations

A Measurement of the Target Single-Spin Asymmetry in Quasi-Elastic 3 He (e, e) Joe Katich for E and the Hall A Collaboration Two-Photon Physics World.

Advertisements

April 06, 2005 JLab 12 GeV upgrade DOE Science Review 1 Fundamental Structure of Hadrons Zein-Eddine Meziani April 06, 2005 DOE Science Review for JLab.

Rory Miskimen University of Massachusetts, Amherst

Spin Structure in the Resonance Region Sarah K. Phillips The University of New Hampshire Chiral Dynamics 2009, Bern, Switzerland July 7, 2009 For the CLAS.

PION STRUCTURE FUNCTION AND MORE. Pion signature in experiment: Forward neutrons in DIS Gottfried Sum rule.

Electromagnetic Sum Rules and Low Energy Theorems Barbara Pasquini, Dieter Drechsel, L. T., Sabit Kamalov Pavia, Mainz, Dubna - the Gerasimov-Drell-Hearn.

THE DEEP INELASTIC SCATTERING ON THE POLARIZED NUCLEONS AT EIC E.S.Timoshin, S.I.Timoshin.

Does a nucleon appears different when inside a nucleus ? Patricia Solvignon Argonne National Laboratory Postdoctoral Research Symposium September 11-12,

Recoil Polarimetry in Meson Photoproduction at MAMI Mark Sikora, Derek Glazier, Dan Watts School of Physics, University of Edinburgh, UK Introduction The.

Real Compton Scattering from the Proton in the Hard Scattering Regime Alan M. Nathan SLAC Experimental Seminar December 2, 2003 I. Compton Scattering from.

UK Hadron Physics D. G. Ireland 10 October 2014 NuPECC Meeting, Edinburgh.

Quark Helicity Distribution at large-x Collaborators: H. Avakian, S. Brodsky, A. Deur, arXiv: [hep-ph] Feng Yuan Lawrence Berkeley National Laboratory.

Probe resolution (GeV) N π,  Q 2 =12 GeV 2 Q 2 =6 GeV 2 The study of nucleon resonance transitions provides a testing ground for our understanding.

Duality: Recent and Future Results Ioana Niculescu James Madison University Hall C “Summer” Workshop.

Baryon Spectroscopy: Recent Results and Impact – , Erice R. Beck HISKP, University of Bonn Introduction Impact of the new Polarization.

N* Production in α-p and p-p Scattering (Study of the Breathing Mode of the Nucleon) Investigation of the Scalar Structure of baryons (related to strong.

What pHe3 can teach us  Polarized He-3 is an effective neutron target  d-quark target  Polarized protons are an effective u-quark target 1 Therefore.

Recent Progress in the MAID Partial Wave Analysis Lothar Tiator Johannes Gutenberg Universität Mainz Compton scattering off Protons and Light Nuclei, ECT*,

Jim Stewart DESY Measurement of Quark Polarizations in Transversely and Longitudinally Polarized Nucleons at HERMES for the Hermes collaboration Introduction.

General Discussion some general remarks some questions.

Electromagnetic N →  (1232) Transition Shin Nan Yang Department of Physic, National Taiwan University  Motivations  Model for  * N →  N DMT (Dubna-Mainz-Taipei)

Dynamical study of N-  transition with N(e,e'  ) Shin Nan Yang Department of Physics National Taiwan University Collaborators: G.Y. Chen, J.C. Chen (NTU)

Accessing Orbital Angular Momentum Thru Pion Cloud Itaru Nakagawa RIKEN/RBRC.

Jump to first page Quark-Hadron Duality Science Driving the 12 GeV Upgrade Cynthia Keppel for Jefferson Lab PAC 23.

Nstars: Open Questions Nstars: Open Questions L. Tiator, Institut für Kernphysik, Universität Mainz  Introduction  Roper and S 11  the role of the D.

Higher order forward spin polarizabilities Barbara Pasquini Pavia U. and INFN Pavia Paolo Pedroni Dieter Drechsel Paolo Pedroni Dieter Drechsel INFN Pavia.

The Quark Structure of the Nucleon Inti Lehmann & Ralf Kaiser University of Glasgow Cosener’s House Meeting 23/05/2007 Nucleon Structure Generalised Parton.

Nucleon Polarizabilities: Theory and Experiments

Measurements with Polarized Hadrons T.-A. Shibata Tokyo Institute of Technology Aug 15, 2003 Lepton-Photon 2003.

Nucleon Resonances in  Scattering up to energies W < 2.0 GeV  introduction  a meson-exchange model for  scattering  conventional resonance parameters.

Measuring the Spin Structure of 3 He and the Neutron at Low Q 2 Timothy Holmstrom College of William and Mary For the Jefferson Lab Hall A Collaboration.

Meson Photoproduction with Polarized Targets   production a)  0 at threshold b) Roper and P 11 (1710)   production a) S 11 -D 13 phase rotation.

Thomas Jefferson National Accelerator Facility PAC-25, January 17, 2004, 1 Baldin Sum Rule Hall C: E Q 2 -evolution of GDH integral Hall A: E94-010,

Baryon Resonance Analysis from MAID D. Drechsel, S. Kamalov, L. Tiator.

Chiral symmetry and Δ(1232) deformation in pion electromagnetic production Shin Nan Yang Department of Physics National Taiwan University “11th International.

Shin Nan Yang National Taiwan University Collaborators: S. S. Kamalov (Dubna) D. Drechsel, L. Tiator (Mainz) Guan Yeu Chen (Taipei) DMT dynamical model.

Overview of Jefferson Lab’s Spin Physics Programme Stephen Bültmann - ODU RHIC/AGS Users Meeting, June 2007 Introduction Experimental Setup Asymmetry Measurement.

Probe resolution (GeV) N π,  Q 2 =12 GeV 2 Q 2 =6 GeV 2 The study of nucleon resonance transitions provides a testing ground for our understanding.

Shin Nan Yang National Taiwan University Collaborators: Guan Yeu Chen (Taipei) Sabit S. Kamalov (Dubna) D. Drechsel, L. Tiator (Mainz) DMT dynamical model.

JLab, October 31, 2008 WACS in 12 GeV era 1 GPDs Wide-Angle Compton Scattering pi-0 photo-production in 12 GeV era B. Wojtsekhowski Outline WACS and other.

Tensor and Flavor-singlet Axial Charges and Their Scale Dependencies Hanxin He China Institute of Atomic Energy.

A partial wave analysis of pion photo- and electroproduction with MAID  introduction  a dynamical approach to meson electroproduction  the unitary isobar.

The EG4 Experiment: A Low Q 2 Determination of the GDH Integral Sarah K. Phillips The University of New Hampshire JLab Users Group Meeting June 9, 2009.

Nucleon spin physics with CLAS at Jlab Fifth International Conference on PERSPECTIVES IN HADRONIC PHYSICS Particle-Nucleus and Nucleus-Nucleus Scattering.

The Fubini-Furlan-Rossetti sum rule. LET.

Probe resolution (GeV) N π,  Q 2 =12 GeV 2 Q 2 =6 GeV 2 The study of nucleon resonance transitions provides a testing ground for our understanding.

Moments and Structure Functions at Low Q 2 Rolf Ent, DIS Formalism - F 2 Moments: Old Analysis (R “Guess”…) - E L/T Separation  F 2, F 1,

Envisioned PbWO4 detector Wide-Angle Compton Scattering at JLab-12 GeV with a neutral-particle detector With much input from B. Wojtsekhowski and P. Kroll.

Understanding the 3 He Nuclei: Asymmetry Measurements in Quasi- Elastic Ge Jin University of Virginia For the E Collaboration.

Timelike Compton Scattering at JLab

A.V. Eskin (Samara University) In collaboration with A.P. Martynenko

Flavor decomposition at LO

Parton to Hadron Transition in Nuclear Physics

DIS off Pions Bogdan Povh

Spin Structure of the Nucleon

Measurements of quark transversity and orbital motion in hard scattering Yoshiyuki Miyachi Tokyo Institute of Technology.

Luciano Pappalardo for the collaboration

Higher twist effects in polarized experiments

Wide Angle Compton Scattering

October 12, Tallahassee, FL

Mainz: Drechsel, Tiator Taipei: Guan Yeu Chen, SNY

Neutron (e,e’π±) Target Single-Spin Asymmetry in Semi-inclusive DIS on a Transversely Polarized 3He Target - Kalyan Allada, Chiranjib Dutta, Mitra Shabestari,

Transversity Distributions and Tensor Charges of the Nucleon

Selected Physics Topics at the Electron-Ion-Collider

B. Povh, MPIK Heidelberg Th. Walcher, Uni Mainz

Single Spin Asymmetry with a Transversely Polarized

Helicity dependence of g n ® Nπ(π) and the GDH integral on the neutrom

Exclusive production at HERMES

Current Status of EBAC Project

Nucleon Spin Structure

Presentation transcript:

MAID and the GDH sum rule in the resonance region Dieter Drechsel, Sabit Kamalov and Lothar Tiator Institut für Kernphysik Universität Mainz electromagnetic sum rules new MAID developments comparison with exclusive data model calculations of sum rules comparison with JLAB data at Q2 > 0 summary

the observed spin structure of the nucleon depends on the resolution of the probe: current quarks sea quarks gluons orbital angular momentum constituent quarks and pion cloud resonance phenomena deep inelastic scattering

Nucleon Compton Scattering Forward Compton Amplitude non spin-flip spin-flip Low Energy Theorems Helicity

Optical Theorem due to Unitarity Dispersion Relations lead to Sum Rules does not converge

Similar for the Spin Amplitude

Summary of various Sum Rules

Summary polarized photo absorption on the proton target s3/2 - s1/2 is reasonably well understood for the resonance region with 1p + 2p + h production exclusive channels are very important in nucleon resonance analysis, e.g. D13(1520) the GDH integral for the proton is not yet saturated in the resonance region Wcm < 2 GeV resonance models overestimate the GDH for the proton and underestimate the GDH for the neutron, e.g.: MAID02+RPR gives approximately: Ip  - 225 mb (proton) GDH(p) - Ip  +20 mb In  - 200 mb (neutron) GDH(n) - In  -33 mb situation with the proton target at Q2 > 0 : results from JLAB/CLAS show reasonable agreement situation with the neutron target at Q2 > 0 : results from Hall A on 3He show up to 40% disagreement for small Q² (below 0.4 GeV²), the agreement is much better for larger Q²