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 …

The past seventeen years have witnessed tremendous progress on the experimental and
theoretical explorations of the multiquark states. The hidden-charm and hidden-bottom …

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 …

The spectrum of hadrons is the manifestation of color confinement of quantum
chromodynamics. Hadronic resonances correspond to poles of the S-matrix. Since 2003 …

In the past decade many charmonium-like states were observed experimentally. Especially
those charged charmonium-like Z c states and bottomonium-like Z b states cannot be …

Since the discovery of the first charmed meson in 1976, many open-charm and open-bottom
hadrons were observed. In 2003 two narrow charm-strange states $ D_ {s0}^{\ast}(2317) …

There are eighteen possibly existing D (*) D¯(*), D (*) K¯(*), and D (*) D s (*)-hadronic
molecular states. We construct their corresponding interpolating currents and calculate their …

Based on our previous QCD sum rule studies on hidden-charm pentaquark states, we
discuss possible interpretations of the P c (4312), P c (4440), and P c (4457), which were …

In the present work, we assign the newly observed P c (4312) as a I (JP)= 1 2 (1 2)-
molecular state composed of Σ c D¯, while P c (4440) and P c (4457) as Σ c D¯* molecular …

Recently, the LHCb Collaboration reported three P c states in the J/ψ p channel. We
systematically study the mass spectrum of the hidden charm pentaquark in the framework of …