Few-Body Systems Composed of Heavy Quarks

TL;DR

This paper reviews recent experimental discoveries of heavy-quark hadron states, focusing on few-body systems like charmonium-like and loosely bound states that challenge traditional quark models.

Contribution

It provides an overview of the experimental findings on heavy-quark few-body systems and discusses their implications for understanding hadron structure.

Findings

Observation of new heavy-quark hadron states

Identification of charmonium-like and loosely bound states

Challenges to conventional quark model explanations

Abstract

Within the past ten years many new hadrons states were observed experimentally, some of which do not fit into the conventional quark model. I will talk about the few-body systems composed of heavy quarks, including the charmonium-like states and some loosely bound states.