Exclusive Reactions At High Momentum Transfer: Proceedings of the International Workshop 21 - 24 May 2007 Jefferson Lab, Newport News, Virginia, USA

SESSION PRESENTATIONS......Page 10
Organizing Committee......Page 6
Preface......Page 8
1. Introduction......Page 16
2. The ERBL factorization scheme......Page 17
3. Handbag factorization in exclusive reactions......Page 19
4. What do we know about the GPDs?......Page 21
5. Deeply virtual exclusive scattering......Page 25
5.1. Deeply virtual Compton scattering......Page 26
5.2. Electroproduction of mesons......Page 27
6. Alternative approaches to deeply virtual processes......Page 29
7. Wide-angle scattering......Page 30
8. Summary......Page 31
References......Page 32
AdS/CFT and Exclusive Processes in QCD S.J. Brodsky and G.F. de T eramond......Page 34
1. Exclusive Processes in QCD......Page 35
2.1. The Hard-Wall Holographic Model......Page 37
3. Light-Front Fock Representation......Page 38
3.1. Light-Front Wavefunctions in Impact Space......Page 39
4. Light-Front Mapping of String Amplitudes......Page 40
4.1. Holographic Light-Front Representation......Page 42
5. Integrability of AdS/CFT Equations......Page 43
6. Hadronic Spectra in AdS/QCD......Page 44
7.1. Hadronic Form Factors of Arbitrary Twist......Page 45
7.2. Meson Form Factors......Page 47
7.3. Contributions to Meson Form Factors and Structure Functions at Large Momentum Transfer in AdS/QCD......Page 48
7.4. The Meson Structure Function......Page 50
7.6. The Meson Distribution Amplitude......Page 51
7.7. The Nucleon Dirac Form Factors......Page 52
8. Overview of Hard Exclusive Processes......Page 53
9. Conclusions......Page 55
References......Page 56
1. Introduction......Page 60
2. Role of the Pion Cloud......Page 61
2.1. Neutron charge distribution......Page 62
2.2. Flavor symmetry violation......Page 63
3. Discoveries in Modern Lattice QCD......Page 64
4. Where is the Spin of the Proton?......Page 67
References......Page 68
The inclusive-exclusive connection......Page 70
Hard-soft coherence in large x Fock states......Page 73
Experimental hints......Page 76
Bloom-Gilman duality......Page 80
Concluding remarks......Page 81
Acknowledgments......Page 82
References......Page 83
1. Introduction......Page 85
2. Deeply virtual Compton scattering beyond NLO......Page 87
3. Results......Page 89
4. Summary......Page 91
References......Page 92
1. Introduction......Page 93
2. Impact Parameter Dependent PDFs and the Sivers Effect......Page 94
3. Charge Density in the Center of the Neutron......Page 96
4. Tensor Correlations......Page 98
References......Page 100
1. Threshold Pion Production......Page 102
2. Light-Cone-Sum Rules......Page 104
3. Moving Away From Threshold......Page 106
References......Page 109
1. Historical introduction......Page 110
2.1. Pion dissociation into two jets......Page 112
2.2. Vector meson production at HERA......Page 113
3.1. Expansion effects......Page 114
3.2. Large angle quasielastic A(p,2p) process......Page 115
3.3. Color transparency in meson production......Page 116
4. Directions for the future studies at Jlab......Page 117
References......Page 118
1. Introduction......Page 119
3. Definitions......Page 120
4. Light cone coordinates......Page 121
6. The main result......Page 122
7. Data analysis and results......Page 123
8. Summary and Interpretation......Page 125
References......Page 126
1. Introduction......Page 127
2. Gap equation......Page 128
3. Mesons and the axial-vector Ward-Takahashi identity......Page 130
4. Baryons......Page 131
5. Epilogue......Page 133
References......Page 134
1. Introduction......Page 136
2. Lattice Techniques......Page 137
3. N to   Electromagnetic Form Factors......Page 139
4. Nucleon and N to   Axial-Vector Form Factors......Page 140
4.1. Goldberger-Treiman relations......Page 141
5. Conclusions......Page 143
References......Page 144
1. Introduction......Page 145
2. PQCD in Light-Front Dynamics......Page 146
3. RCS Results......Page 149
4. Extension to Virtual Compton Scattering......Page 150
References......Page 152
1. Introduction......Page 153
2. The First DVCS Publications from Hall B/CLAS......Page 154
3. The Hall A Experiments E00-110 and E03-106......Page 155
4. The E1-DVCS Hall B/CLAS Experiment......Page 158
References......Page 160
1. Introduction......Page 161
2. GPD H via beam-charge and beam-spin asymmetries......Page 162
3. GPDs H and E via transverse target-spin asymmetry......Page 165
4. DVCS on nuclei......Page 166
References......Page 168
1. Introduction......Page 169
2. Experimental context......Page 170
3. Analysis and results......Page 171
References......Page 173
1. Introduction......Page 174
2. Physics case......Page 175
4. Results......Page 176
References......Page 177
1. Critical experimental assessment of the previous generation of DVCS experiments in Hall A at JLab......Page 178
2. E07-007: Complete separation of deeply virtual photon and   0 electroproduction observables of unpolarized protons......Page 179
3. E12-06-114: Measurements of the electron-helicity dependent cross sections of the DVCS with CEBAF at 12 GeV......Page 180
References......Page 181
1. Introduction......Page 182
2. GPDs and DVCS......Page 184
4. Projected Results at 12 GeV with CLAS12......Page 185
References......Page 187
Quark Helicity Flip and the Transverse Spin Dependence of Inclusive DIS A. Afanasev, M. Strikman and C. Weiss......Page 188
References......Page 195
Introduction......Page 196
References......Page 204
Exclusive  0 Electroproduction on the Proton: GPDs or not GPDs? M. Guidal and S. Morrow......Page 205
Acknowledgment......Page 214
References......Page 215
2. Hard Exclusive   0 Meson Production......Page 216
Acknowledgment......Page 218
References......Page 219
1. Introduction......Page 221
3. Results......Page 223
References......Page 224
1. Introduction......Page 226
2. Generalized Parton Distributions from Lattice Moments......Page 227
3. Reconstruction from Bernstein Polynomials......Page 228
4. Comparison with Experiment......Page 230
5. Angular Momentum Sum Rule......Page 231
6. Conclusions......Page 232
References......Page 233
Imaging the Proton via Hard Exclusive Production in Di ractive pp Scattering C.E. Hyde, L. Frankfurt, M. Strikman and C. Weiss......Page 234
References......Page 239
1. Introduction......Page 240
2. t-channel description of DIS and DVCS reactions......Page 241
3. s-channel description of DVCS......Page 243
4. Summary......Page 244
References......Page 245
1. Introduction to Nuclear QCD......Page 246
2. High Energy Break-Up of Two Nucleons in Nuclei......Page 247
3. Hard Rescattering Mechanism of Two-Body Break-up Reactions......Page 248
4. Hard Break-Up of Two Protons from 3He......Page 250
5. Helicity Selection Mechanism......Page 251
6. Summary and Outlook......Page 252
References......Page 253
1. Introduction......Page 254
2. High Energy Deuteron Photodisintegration......Page 255
3. Low Energy Deuteron Photodisintegration......Page 256
4. pp photodisintegration in 3He......Page 258
Acknowledgments and Appendices......Page 260
References......Page 261
A Review of the Few-Body Form Factors G.G. Petratos......Page 262
References......Page 267
Nucleon Form Factor Measurements and Interpretation C.F. Perdrisat......Page 268
References......Page 275
1. INTRODUCTION......Page 278
2. CONSEQUENCES ON CHARGE DISTRIBUTION WITHIN PROTON......Page 280
3. POSSIBLE INSIGHT BY DIS......Page 281
4. SENSITIVITY OF STRANGE NUCLEON FFs ON DIPOLE AND NON-DIPOLE GEp(Q2)-BEHAVIOR......Page 282
References......Page 284
High Q2 Large Acceptance Gp E=Gp M Measurements Using Polarization Transfer L. Pentchev, C.F. Perdrisat and B. Wojtsekhowski......Page 285
References......Page 289
1. INTRODUCTION......Page 290
2. THE CLAS MEASUREMENT......Page 291
References......Page 293
1. Introduction......Page 294
2. Experimental Technique......Page 295
3. Calibration......Page 296
References......Page 297
1. Introduction......Page 298
1.3. Cross Sections for Time-like Momentum Transfers......Page 299
2.1. Spacelike Form Factors of the Proton......Page 300
2.2. Timelike Form Factors of the Proton......Page 301
3. Meson Form Factors......Page 302
3.1. Pion Form Factors......Page 303
3.3. The CLEO Measurements of Pion and Kaon Form Factors......Page 304
References......Page 306
1. Introduction......Page 307
2. Single and double spin polarization observables......Page 308
References......Page 312
1. Introduction......Page 313
2. Light-cone sum rules for form factors......Page 314
3. Nucleon- -transition......Page 316
4. Conclusions......Page 317
References......Page 318
1. Overview......Page 319
2. Physical Motivation......Page 322
3. Experimental Overview......Page 323
5. Differential Cross Sections......Page 324
Acknowledgements......Page 327
References......Page 328
1. Introduction......Page 329
3. Multipion Background......Page 330
5. Helicity Amplitude......Page 331
6. Conclusion......Page 333
References......Page 334
Two-Photon Exchange in Electron-Proton Elastic Scattering: Theory Update A.V. Afanasev......Page 335
References......Page 342
1. Introduction......Page 344
3. Calculation and Results......Page 345
References......Page 347
1. Introduction......Page 349
2. Hall-B lepton beamline......Page 352
3. October 2006 engineering run......Page 353
4. Future measurements......Page 355
References......Page 356
1. Meson Form Factors in QCD......Page 357
2.1.      0 Form Factor Measurements......Page 358
2.2. Charged Pion (and Kaon) Form Factor Measurements......Page 360
References......Page 364
2.1. Nucleon DAs of twist-3......Page 365
2.2. Pion-Nucleon DAs of twist-3......Page 367
Acknowledgements......Page 368
References......Page 370
1. Introduction......Page 371
2. Group Theory Preliminaries......Page 372
4. Phenomenological Results......Page 373
References......Page 374
2. e+e......Page 375
3. e+e......Page 376
4. e+e-      (Preliminary result)......Page 378
References......Page 381
1. Introduction......Page 382
2.1. Mesonic TDAs vs. GPDs......Page 383
2.3. Models......Page 385
3.1. Definitions......Page 386
3.2. Experimental situation......Page 387
References......Page 388
1. Introduction......Page 390
2. Diffractive Deep Inelastic Scattering......Page 392
3. Shadowing and Antishadowing of Nuclear Structure Functions......Page 396
4. Single-Spin Asymmetries from Initial- and Final-State Interactions......Page 398
6. The Sivers Effect in General Inclusive Reactions......Page 400
Acknowledgments......Page 401
References......Page 402
1. Introduction......Page 403
2. Large-x  q distribution......Page 404
3. Phenomenological applications......Page 407
References......Page 408
1. Introduction......Page 409
2. Distribution and Fragmentation Functions......Page 410
3. Double Spin Asymmetry......Page 411
4. Discussions......Page 413
Acknowledgments......Page 414
References......Page 415
1. Introduction......Page 416
2. T-even parton distributions......Page 417
3. T-odd parton distributions......Page 419
4. Phenomenology......Page 421
References......Page 425
2. Space-like Process (e p e X)......Page 427
3. Time-like Process (e+e  F(or A)X)......Page 428
Acknowledgments......Page 430
References......Page 431
1. Introduction......Page 432
2. The HERMES Recoil Detector......Page 433
3. Performance and Statistics......Page 434
References......Page 435
2. CLAS/DVCS Experiment......Page 436
3. Energy Calibration......Page 437
5. CLAS and IC Measurements......Page 438
References......Page 439
1. Introduction......Page 440
Participants List......Page 446