Indications of a Four-Quark Structure for the X(3872) and X(3876) Particles from Recent Belle and BABAR Data

TL;DR

Recent experimental data from BELLE and BaBar suggest that the X(3872) and a nearby state may have a four-quark structure, with implications for identifying charged partners and understanding their production and decay behaviors.

Contribution

This paper proposes a four-quark model explanation for the X(3872) and related states, aligning recent experimental findings with theoretical predictions.

Findings

Identification of two X states consistent with four-quark model

Production and decay patterns match four-quark state expectations

Hints provided for detecting charged partners of the X particles

Abstract

Recent results by BELLE and BaBar point to the existence of a second X particle decaying in D^0 D^0bar pi^0, a few MeV above the X(3872). We identify the two X states with the neutral particles predicted by the 4-quark model and show that production and decays are consistent with this assignement. We consider the yet-to-be-observed charged partners and give new hints on how to look for them.