One-pion exchange in the X(3872) revisited

TL;DR

This paper reevaluates the role of one-pion exchange in binding the X(3872) state, concluding it is insufficient and suggesting other short-range interactions are responsible.

Contribution

It provides a critical reassessment of one-pion exchange as a binding mechanism for X(3872), highlighting the need for alternative short-range dynamics.

Findings

One-pion exchange is not sufficiently binding for X(3872).

Other short-range interactions are likely responsible for X(3872) formation.

Reevaluation challenges previous assumptions about pion exchange in this context.

Abstract

We re-examine one-pion exchange as a possible binding mechanism in the X(3872) charmonium-like state and argue it to be not sufficiently binding for this purpose. We conclude therefore that other short-range dynamics are responsible for the X formation.