Arenhövel / Backe / Drechsel Many Body Structure of Strongly Interacting Systems

Refereed and Selected Contributions from the Symposium '20 Years of Physics at the Mainz Microtron MAMI'
1. Auflage 2007
ISBN: 978-3-540-36754-3
Verlag: Springer-Verlag
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 219 Seiten

This carefully edited proceedings volume provides an extensive review and analysis of the work carried out over the past 20 years at the Mainz Microtron (MAMI). This research is centered on the application of Quantum Chromodynamics in the strictly nonperturbative regime at hadronic scales of about 1 fm. The book goes further to offer an outlook on the next wave research, with the forthcoming upgrade of MAMI.

Autoren/Hrsg.

Arenhövel, Hartmuth

Backe, Hartmut

Drechsel, Dieter

Friedrich, Jörg

Kaiser, Karl-Heinz

Walche, Thomas

Inhaltsverzeichnis

1;Sponsors;4
2;Contents;5
3;Foreword;7
4;The beauty of the electromagnetic probe;9
4.1;1 Introduction;9
4.2;2 Evidence for multiple photon effects in elastic electron scattering from the proton;10
4.3;3 Role of sea quarks in nucleon structure;10
4.4;4 BLAST Experiment at MIT-Bates;11
4.5;5 Conclusion;12
4.6;References;13
5;Physics at the Thomas Jefferson National Accelerator Facility;14
5.1;1 Personal Comments;14
5.2;2 Research at Jefferson Laboratory;14
5.3;3 How are the nucleons made from quarks and glue?;15
5.4;4 Explore the limits of our understanding of nuclear structure;21
5.5;5 Summary;23
5.6;References;23
6;Few-nucleon systems at MAMI and beyond;25
6.1;1 Introduction;25
6.2;2 Short overview of the (e, eN) reaction;25
6.3;3 Studies of the deuteron;26
6.4;4 3He and 4He studies;29
6.5;5 Polarization transfer experiments;32
6.6;6 Summary and conclusion;33
6.7;References;33
7;Experiments with polarized 3He at MAMI;34
7.1;1 Introduction;34
7.2;2 Polarization methods;35
7.3;3 Experiments with polarized;35
7.4;4 Summary and outlook;42
7.5;References;43
8;Few-nucleon systems (theory);44
8.1;1 Introduction;44
8.2;2 The two-nucleon system;44
8.3;3 More complex few-nucleon systems;51
8.4;4 Summary and outlook;52
8.5;References;53
9;Nucleon form factors in dispersion theory;54
9.1;1 Introduction;54
9.2;2 Definitions;55
9.3;3 Dispersion relations and spectral decomposition;55
9.4;4 Two-pion continuum;56
9.5;5 Spectral functions;57
9.6;6 Constraints;58
9.7;7 Fit results;58
9.8;8 Time-like data;59
9.9;9 Pion cloud of the nucleon;60
9.10;10 Summary & outlook;61
9.11;References;62
10;Chiral perturbation theory;63
10.1;Success and challenge;63
10.2;1 Introduction;63
10.3;2 Chiral perturbation theory for mesons;64
10.4;3 Chiral perturbation theory for baryons;67
10.5;4 Summary;73
10.6;References;73
11;Two-photon physics;75
11.1;1 Introduction;75
11.2;2 Sum rules in Compton scattering;75
11.3;3 Nucleon excitation spectrum;77
11.4;4 Conclusions;83
11.5;References;83
12;Electromagnetic form factors of the nucleon;85
12.1;Experiments at MAMI;85
12.2;1 Introduction;85
12.3;2 Coincidence experiments to measure GM,n;86
12.4;3 Double-polarisation observables;87
12.5;4 Double-polarisation experiments;88
12.6;5 Interpretation;92
12.7;6 Conclusions;93
12.8;References;93
13;Photo- and electro-excitation of the .-resonance at MAMI;95
13.1;1 Introduction;95
13.2;2 Kinematics and cross section of pion photo-and electro- production;96
13.3;3 Experimental methods and results;97
13.4;4 Interpretation;103
13.5;5 Summary and outlook;104
13.6;References;104
14;Parity violation in electron scattering;105
14.1;1 Introduction;105
14.2;2 Physics program;105
14.3;3 Summary;110
14.4;References;110
15;Parity-violating electron scattering at the MAMI facility in Mainz;111
15.1;The strangeness contribution to the form factors of the nucleon;111
15.2;1 Introduction;111
15.3;2 Strangeness in the nucleon;111
15.4;3 Strangeness contribution to the form factors of the nucleon;112
15.5;4 The A4 experimental setup and analysis;113
15.6;5 Conclusion;116
15.7;6 Perspectives;117
15.8;References;118
16;Virtual Compton Scattering at MAMI;120
16.1;1 Virtual Compton Scattering and polarizabilities;120
16.2;2 The unpolarized experiments at threshold;122
16.3;3 Single polarized experiments above pion threshold;128
16.4;4 Double polarized experiments at threshold;128
16.5;5 Conclusion;130
16.6;References;130
17;Experimental tests of Chiral Perturbation Theory;131
17.1;1 Introduction ;131
17.2;2 Neutral pion photo production;131
17.3;3 Electroproduction;133
17.4;4 Coherent production from the deuteron;136
17.5;5 Summary and outlook;139
17.6;References;139
18;The Bonn Electron Stretcher Accelerator ELSA: Past and future;140
18.1;1 The beginning ;140
18.2;2 The 500MeV synchrotron;140
18.3;3 The 2.5GeV synchrotron;141
18.4;4 The 3.5GeV ELSA stretcher ring;144
18.5;5 Polarised electrons;146
18.6;6 Future plans;148
19;The Mainz Microtron MAMI —Past and future;150
19.1;1 Introduction;150
19.2;2 The racetrack microtron (RTM);151
19.3;3 From MAMIA to MAMIB;152
19.4;4 The Harmonic Double-Sided Microtron ( HDSM) as the fourth stage of MAMI;155
19.5;References;160
20;The Gerasimov-Drell-Hearn sum rule at MAMI;162
20.1;1 Introduction;162
20.2;2 Experimental setup;163
20.3;3 Results;165
20.4;References;172
21;Experiments with photons at MAMI;173
21.1;1 Introduction;173
21.2;2 Low-energy Compton scattering;173
21.3;3 Pion polarizability;174
21.4;4 Pion photoproduction in the threshold region;176
21.5;5 The .N . .(1232) transition and the E2/M1 ratio;178
21.6;6 Future plans;180
21.7;References;183
22;Coherent X-rays at MAMI;184
22.1;1 Introduction;184
22.2;2 X-Ray interferometry;185
22.3;3 Parametric X-radiation;189
22.4;4 Conclusion and outlook;192
22.5;References;192
23;X-ray phase contrast imaging at MAMI;195
23.1;1 Introduction;195
23.2;2 Absorption versus phase shift;196
23.3;3 Refraction contrast radiography;196
23.4;4 Toward hard X-ray in-line holography;200
23.5;References;205
24;Twenty years of physics at MAMI —What did it mean?;207
24.1;1 Introduction;207
24.2;2 MAMI microtron development;208
24.3;3 Experimental equipment at MAMI;209
24.4;4 Selected experiments;210
24.5;5 Experiment —Theory interplay at MAMI;215
24.6;6 MAMI funding and operation;216
24.7;7 The legacy of 20 year of MAMI physics;217
24.8;8 Summary;217
24.9;References;217
25;Author index;218