Kroll, P. and Schaefer, Andreas (2005) The process pp(-) -> gamma pi(0) within the handbag approach. EUROPEAN PHYSICAL JOURNAL A, 26 (1). pp. 89-98. ISSN 1434-6001,
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We analyse the exclusive channel p (p) over bar -> gamma pi(O); assuming handbag dominance. The soft parts are parametrized in terms of CGLN amplitudes for the q (q) over bar -> gamma pi(O) transition and form factors for the p (p) over bar -> q (q) over bar ones; the latter represent moments of Generalized Distribution Amplitudes. We present a combined fit to Fermilab data from E760 taking simultaneously into account information from other exclusive reactions, especially from p (p) over bar -> gamma gamma data. Overall a nicely consistent picture emerges, such that one can hope, that our theoretical analysis will be reliable also for the kinematics of GSI/FAIR, which, hopefully, will provide much more precise and complete data. Consequently, data from this facility should improve our knowledge both on the proton-antiproton distribution amplitudes and the pion production mechanism.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GENERALIZED PARTON DISTRIBUTIONS; CROSS-SECTION; FORM-FACTOR; TRANSVERSE-MOMENTUM; EXCLUSIVE PROCESSES; COMPTON-SCATTERING; SCALING LIMIT; QCD; PHOTOPRODUCTION; ANNIHILATION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Apr 2021 08:09 |
| Last Modified: | 26 Apr 2021 08:10 |
| URI: | https://pred.uni-regensburg.de/id/eprint/35564 |
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