Abstract
We consider the chiral expansion of the threshold amplitude for the reaction γp → π 0 π 0 p to order O ( M π 2). We substantiate a claim that this photoproduction channel is significantly enhanced close to threshold due to pion loops. A precise measurement of the corresponding cross sections is called for which allows to test chiral perturbation theory.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have