PION-PRODUCTION BY THE REACTION P + P-]PI+ + D USING POLARIZED BEAM AND TARGET

The information to be obtained from differential cross section measurements on the reaction p + p → π+ + d using a polarized beam and target is discussed. Up to now this reaction has been investigated only with an unpolarized target. The experimental knowledge on the reaction is briefly reviewed. Expressions are given for the differential cross section, using also polarized target, and information to be obtained on production amplitudes is discussed. For proton lab energies up to 1 GeV only pion partial s-, p- and d-waves are supposed to be effective. The seven kinematically permissible production amplitudes can be fully determined from differential cross section measurements using a polarized beam and target if only two deuteron vector polarizations without a polarized target are determined in addition. Some solid-angle restrictions for usual" dynamically polarized targets are discussed. © 1978."