The past decades witnessed the golden era of hadron physics. Many excited open heavy
flavor mesons and baryons have been observed since 2017. We shall provide an updated …

Chiral symmetry and its spontaneous breaking play an important role both in the light
hadron and heavy hadron systems. The chiral perturbation theory (χ PT) is the low energy …

Quantum chromodynamics, the theory of the strong force, describes interactions of coloured
quarks and gluons and the formation of hadronic matter. Conventional hadronic matter …

Conventional hadronic matter consists of baryons and mesons made of three quarks and
quark-antiquark pairs, respectively. The observation of a new type of hadronic state, a …

There has recently been a dramatic renewal of interest in hadron spectroscopy and charm
physics. This renaissance has been driven in part by the discovery of a plethora of …

The quark model was formulated in 1964 to classify mesons as bound states made of a
quark–antiquark pair, and baryons as bound states made of three quarks. For a long time all …

The spectrum of hadronic molecules composed of heavy–antiheavy charmed hadrons has
been obtained in our previous work. The potentials are constants at the leading order, which …

We report a study of the processes of e+ e−→ K+ D s− D* 0 and K+ D s*− D 0 based on e+
e− annihilation samples collected with the BESIII detector operating at BEPCII at five center …

Many efforts have been made to reveal the nature of the overabundant resonant structures
observed by the worldwide experiments in the last two decades. Hadronic molecules attract …

A large number of experimental discoveries especially in the heavy quarkonium sector that
did not meet the expectations of the until then very successful quark model led to a …