Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-02-06
Phys.Atom.Nucl.69:721-733,2006
Physics
Nuclear Physics
Nuclear Theory
18 pages, 8 figures; will be published in Phys.Atom.Nucl_4_2006
Scientific paper
10.1134/S1063778806040168
Within spectator model we study the reaction ${\gamma}d \to K^-{\Theta}^+p \to K^-K^+np$ in the threshold energy region. We present the predictions for the exclusive and inclusive antikaon angular distributions in the laboratory system for this reaction calculated for two possible parity states of the ${\Theta}^+$ resonance at 1.5 and 1.75 GeV beam energies with and without imposing the relevant kinematical cuts on those parts of the sampled phase space where contribution from the main background sources associated with the ${\phi}(1020)$, ${\Lambda}(1520)$ production as well as with the $K^-p$--rescattering in the final state, is expected to be dominant. We show that under chosen kinematics these distributions are sensitive to the ${\Theta}^+$ parity and, therefore, can be used as a filter for the determination of its parity.
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