A Uniform Description of the States Recently Observed at B-factories

TL;DR

This paper proposes a unified baryonium framework to interpret recently observed exotic states at B-factories, providing explanations for their properties and making predictions for future experiments.

Contribution

It introduces a systematic baryonium-based interpretation for new charmonium-like states, unifying their descriptions and offering testable predictions.

Findings

New states fit into the baryonium picture

Characters of these states are explained within this framework

Predictions made for future experimental verification

Abstract

The newly found states Y(4260), Y(4361), Y(4664) and Z$^\pm$(4430) stir broad interest in the study of spectroscopy in a typical charmonium scale. The Y(4260) which was observed earlier has been interpreted as hybrid, molecular state, and baryonium, etc. In this note we show for the first time that these new structures, which are hard to be interpreted as charmonium states, can be systematically embedded into an extended baryonium picture. According to this assignment, the so far known characters of these states are understandable. And, in the same framework, we make some predictions for experimenters to measure in the future.