Determining the $Θ^+$ quantum numbers through the $K^+p\to π^+K^+n$ reaction

T. Hyodo, A. Hosaka, E. Oset

Published 2003-07-28, updated 2003-11-12Version 2

We study the $K^+p\to \pi^+K^+n$ reaction with some kinematics suited to the production of the $\Theta^+$ resonance recently observed. We show that, independently of the quantum numbers of the $\Theta^+$, a resonance signal is always observed in the $K^+$ forward direction. In addition, we also show how a combined consideration of the strength at the peak, and the angular dependence of polarization observables can help determine the $\Theta^+$ quantum numbers using the present reaction.