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

TL;DR

This paper proposes a hypothesis that the Theta+ pentaquark is produced mainly from many-quark states in high-energy processes, explaining its inconsistent observation across experiments and suggesting new experiments to clarify its existence.

Contribution

It introduces a novel hypothesis linking Theta+ production to many-quark states, unifying positive and null experimental results, and proposes new experimental approaches for investigation.

Findings

Explains non-observation of Theta+ in some experiments

Describes production mechanisms involving many-quark states

Suggests new experiments to test Theta+ existence

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.