S-wave and P-wave pi pi and K pi contributions to three-body decay processes in the resonance-spectrum expansion

摘要

We study S- and P- wave pp and Kp distributions for the three- body production processes J/psi -> omega pi(+)pi(-), D+ -> K- pi(+)pi(+), D+ -> K+pi(+)pi(-) and D-s(+) -> K+ pi(+)pi(-), by applying the resonance-spectrum expansion to the two-body subamplitudes. The results are compared to the corresponding signals reported by the BES, E791 and FOCUS collaborations. We find that the studied S- and P- wave channels can largely account for the observed structures in the data up to 1 GeV.