Results of the searches for pentaquarks with strangeness in DIS at HERA

The K 0 S p invariant mass spectrum was reconstructed in several kinematic regions with the main emphasis on the studies of the production mechanism of the Θ + candidate recently observed by ZEUS. The candidate Θ + signal was found to be produced predominantly in the forward hemisphere in the laboratory frame. This is unlike the case for the Λ(1520) or the Λ c , and indicates that the Θ + may have an unusual production mechanism related to proton-remnant fragmentation. H1 does not observe a signal and sets an upper limit at 95% C.L. which does not exclude the ZEUS observation. c Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.