Evidence for a narrow dip structure at 1.9 GeV/c$^2$ in $3\pi^+ 3\pi^- $ diffractive photoproduction

TL;DR

This paper reports the observation of a narrow dip at 1.9 GeV/c² in the 3π+3π− final state during diffractive photoproduction, providing new experimental evidence for this phenomenon.

Contribution

The study presents the first observation of a narrow dip structure at 1.9 GeV/c² in diffractive photoproduction of 3π+3π−, expanding understanding of meson production mechanisms.

Findings

Narrow dip observed at 1.9 GeV/c²

First experimental evidence of this dip in photoproduction

Implications for meson spectroscopy and resonance structures

Abstract

A narrow dip structure has been observed at 1.9 GeV/c$^2$ in a study of diffractive photoproduction of the $~3\pi^+3\pi^-$ final state performed by the Fermilab experiment E687.