Theta⁺ formation in inclusive gamma D to pK^-X

We analyze the possibility to produce an intermediate Tp via a KN to Tp formation process in gamma D to pK^-X (X=nK⁺,pK⁰) reactions at some specific kinematical conditions, in which a pK^- pair is knocked out in the forward direction and its invariant mass is close to the mass of Ls (Ls equiv Lambda(1520)). The Theta⁺ signal may appear in the [gamma D,pK^-] missing mass distribution. The ratio of the signal (cross section at the Theta⁺ peak position) to the smooth background processes varies from 0.7 to 2.5 depending on the spin and parity of Tp, and it decreases correspondingly if the pK^- invariant mass is outside of the Ls-resonance region. We analyze the recent CLAS search for the Tp in the gamma D to pK^-nK⁺ reaction and show that the conditions of this experiment greatly reduce the Tp formation process making it difficult to extract a Tp peak from the data.