Coulomb Production Method for Studying

ABSTR4CT We consider the production of pion pairs in the Coulomb field by photons and pions, a method which can be used to study the 7r-r interaction. Simple general formulas are given for the angular correlations of the 71 pairs, the behavior of the cross section with angle and energy, and the effects of the p " coherent production background.. The question of the nature value of the T-T interaction, particularly in the s-wave, continues to be of the greatest interest in elementary particle physics. It is relevant to such diverse questions as the final state interaction in K " decays, chiral symmetry, and nuclear force calculations. A considerable effort has been expended in studying " p reactions' in situations where r exchange is dominant, allowing for a separation of the process 7~ + 7r-r-t r. This method, particularly for s-wave TVJ interactions is troubled by the facts that the p resonance in the p-wave is the very dominant feature of the 7~7r system, and the existence of possible background processes other than 7r exchange, some of which can behave like r