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HK: Physik der Hadronen und Kerne

HK 38: Electromagnetic and Hadronic Probes VI

HK 38.8: Talk

Thursday, March 11, 2004, 15:45–16:00, B

Photo-induced Φ-meson production in a coupled channels framework. — •Olaf Scholten — KVI, 9747 AA Groningen, The Netherlands

Results are presented of a coupled channels calculation of photo-induced Φ-meson production off the proton. In addition to π-N also the coupling to the η-N, K-Λ and K-Σ channels is taken into account with realistic coupling constants in a gauge-invariant approach. The approach is in some respects similar to that of ref.[1]

Coupled channels effects are shown to have large effects on the cross sections at larger scattering angles. Much of the structure seen in various polarization observables appears to be due to the interplay between the direct reaction component and coupled channels effects.

[1] A.Yu. Korchin, O. Scholten and R.G.E. Timmermans, Phys. Lett. B438, 1 (1998); G. Penner and U. Mosel, Phys. Rev. C 66, 055212 (2002).