Θ+ formation in inclusive γD→pK-X

We analyze the possibility of producing an intermediate Θ+ via a KN→Θ+ formation process in γD→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 Λ*[Λ*≡Λ(1520)]. The Θ+ signal may appear in the [γD,pK-] missing mass distribution. The ratio of the signal (cross section at the Θ+ peak position) to the smooth background processes varies from 0.7 to 2.5 depending on the spin and parity of Θ+, and it decreases correspondingly if the pK- invariant mass is outside of the Λ*-resonance region. We analyze the recent CLAS search for the Θ+ in the γD→pK-nK+ reaction and show that the conditions of this experiment greatly reduce the Θ+ formation process making it difficult to extract a Θ+ peak from the data