Search for a strongly decaying neutral charmed pentaquark

TL;DR

This paper reports a search for a neutral charmed pentaquark decaying strongly to D(*)-p, but finds no evidence and sets upper limits on its production rate relative to known particles.

Contribution

It provides the first experimental limits on the production of a neutral charmed pentaquark in high-energy collisions.

Findings

No evidence for the pentaquark was observed.

Upper limits were established on the production cross section.

The results constrain theoretical models of pentaquark production.

Abstract

We present a search for a charmed pentaquark decaying strongly to $D^{(*)-}p$. Finding no evidence for such a state, we set limits on the cross section times branching ratio relative to $D^{*-}$ and $D^-$ under particular assumptions about the production mechanism.