We study the ρ and φ decays into ππγ, ππγ using a chiral unitary approach to deal with the final state interaction of the ππ system. The final state interaction modifies only moderately the large momenta tail of the photon spectrum of the ρ → ππγ decay. In the case of φ decay the contribution to ππγ and ππγ decay proceeds via kaonic loops, which are finite, and gives a distribution of ππ invari...

The Watson-Migdal approximation scheme to take into account final state interactions is shown to give the actual threshold momentum dependence of the reaction pp → ppπ. However, by an explicit plane wave replacement of the final state wave function it is stressed that not too much physical significance should be given to the proportionality coefficient extracted using this procedure. The plane ...

The K+K− final state interaction was investigated based on both the K+K− invariant mass distributions measured at excess energies of Q = 10 and 28 MeV and the near threshold excitation function for the pp → ppK+K− reaction. The K+K− final state enhancement factor was parametrized using the effective range expansion. The effective range of the K+K− interaction was estimated to be Re(bK+K− ) = −0...

Three experiments examined the role of step-by-step and final-state diagrams in supporting object assembly. A total of 180 college students made origami objects from instructions consisting of text only, text plus a final-state (completed-object) diagram, or text plus step-by-step and final-state diagrams. In Experiments 1 and 2, construction accuracy in the final-diagram condition was comparab...