Final state interactions in the decays J/ψ→VPP

Bochao Liu, Markus Büscher, Feng-Kun Guo, Christoph Hanhart, Ulf-G. Meißner
2009 European Physical Journal C: Particles and Fields  
We investigate the interplay between crossed channel final state interactions and the constraints from two--particle unitarity for the reactions J/psi->V pi pi and VK\bar K, where V is either omega or phi. Using a model where the parameters are largely constrained by other sources, we find that, although small, crossed channel final state interaction can influence the amplitudes considerably, in special areas of phase space. These results cast doubt on the inapplicability of unitarity
more » ... s on production amplitudes as recently claimed in the literature.
doi:10.1140/epjc/s10052-009-1083-2 fatcat:mdslztv6tvb7pchbdiz2zxjh3u