Positivity constraints for off-forward parton distributions
B. Pire1 - J. Soffer 2 - O.Teryaev1,3
1 CPhT, Ecole Polytechnique, F-91128
2 CPT-CNRS, F-13288 Marseille Cedex 9, France
3 Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
Received: 16 September 1998 / Revised version: 15 October 1998 / Published online: 11 March 1999
Off-Forward Parton Distributions (OFPD's) are new hadronic objects which may be measured in various exclusive reactions. We derive non-trivial positivity constraints for them that should allow to get unbiased rate estimates for proposed experiments.