6533b7dbfe1ef96bd127070e

RESEARCH PRODUCT

Deeply bound pionic states with the (Sigma-, Lambda) reaction

subject

description

We study the reactionΣ − +A→Λ + (Aπ −) with the π− bound in the nucleus, as a means of producing deeply bound pionic states in nuclei, so far unobserved. The reaction is similar to the (n, p) reaction but, because of theΣ −, Λ mass difference, it allows the reaction to occur with smaller momentum transfer, thus increasing the transition probability and reducing the effects of distortion. The ratios of signal to background are one to two orders of magnitude better than in the (n, p) reaction.