Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-03-08
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pp, LaTeX 2e, uses acromake package
Scientific paper
We consider double-photon and bremsstrahlung mechanisms for the production of two charged pions in high-energy electron (or proton) scattering off a transversely polarised proton. Interference between the relevant amplitudes generates a charge-odd contribution to the cross-section for the process. In the kinematical configuration with a jet nearly collinear to the electron, the spin-independent part may be used to the determine phase differences for pion-pion scattering in states with orbital momentum 0 or 2 and 1, while for the configuration with a jet nearly collinear to the proton, the spin-dependent part may be used to explain the experimental data for single-spin correlations in the production of negatively charged pions. We also discuss the backgrounds and estimate the accuracy of the results to be better than 10 %. In addition, simplified formulae derived for specific kinematics, with small total transverse pion momenta, are given. The accuracy is estimated to remain at the same level despite the lower energy.
Galynsky M.
Kuraev E.
Ratcliffe Philip
Shaikhatdenov Binur
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