We study determination of the parity of the pentaquark baryons in two different processes. First, we investigate the Theta^+ production via the vec{ p} vec{ p} -> Sigma^+ Theta^+ reaction process which was proposed to determine unambiguously the parity of Theta^+. We observe the clear differences in the total cross sections and the spin observable A_{ xx}. As for the Xi_5 in the bar{ K} N -> K Xi_5 reaction process, the total cross section for the positive parity presents about one hundred times lager than that of the negative one due to the huge destructive interference.
Categories: hep-ph