An explanation why the Theta+ is seen in some experiments and not in others

Abstract

To understand the whole set of positive and null data on the Theta+(1530) - production, we suggest the hypothesis that multiquark hadrons are mainly generated from many-quark states, which emerge either as short-term hadron fluctuations, or as hadron remnants in hard processes. This approach allows us to describe both non-observation of the Theta+ in current null experiments and peculiar features of its production in positive experiments. Further, we are able to propose new experiments that might be decisive for the problem of the Theta+ existence. Studies of properties and distributions of the Theta+ in such experiments can give important information on the structure of both conventional and multiquark hadrons. It would provide better insight into how QCD works.

The shortened and slightly modified version of arXiv:0704.3045, accepted for publication in Phys. Rev. D