Nature of X(3872) from data

TL;DR

This paper analyzes experimental data from Belle and BaBar to explore the nature of the X(3872) state, suggesting it has both a charmonium component and a dynamically generated Dar{D}* state.

Contribution

It provides a comparative analysis of recent Belle and BaBar data, proposing a mixed charmonium and molecular structure for X(3872).

Findings

BaBar data favor a virtual Dar{D}* state

Belle data indicate a significant car{c} 2^3P_1 component

X(3872) has a mixed charmonium and molecular nature

Abstract

Properties of the charmonium-like state X(3872) are investigated and its nature is discussed as based on the existing experimental data. In particular, we analyse the new data from Belle and BaBar Collaborations and argue that, while the BaBar data prefer the dynamically generated virtual state in the D\bar{D}* system, the new Belle data clearly indicate a sizable c\bar{c} 2^3P_1 component in the X wave function.