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 …

We review the recent status of the QCD sum rule approach to study the properties of
hadrons in vacuum and in hot or dense matter. Special focus is laid on the progress made in …

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 …

Inspired by P c (4380) and P c (4450) recently observed by LHCb, a QCD sum rule
investigation is performed, by which they can be identified as exotic hidden-charm …

There may be seven hadronic molecular states. We construct their corresponding
interpolating currents and calculate their masses and decay constants using QCD sum rules …

We study the mass spectra of hidden-charm pentaquarks having spin J= 1\over 2/3\over
2/5\over 2 J= 1 2/3 2/5 2 and quark contents uud c ̄ c uudcc¯. We systematically construct …

We construct charmoniumlike and bottomoniumlike molecular interpolating currents with
quantum numbers JPC= 1+-in a systematic way, including both color singlet-singlet and …

We have studied the mass spectra of doubly charmed pentaquark states in the Λ c (*) D (*)
and Σ c (*) D (*) channels with JP= 1/2±, 3/2±, and 5/2±within the framework of quantum …

Spectral functions of the pseudoscalar D meson in the nuclear medium are analyzed using
QCD sum rules and the maximum entropy method. This approach enables us to extract the …

We study the hidden-charm pentaquark states udscc¯ with spins 1/2, 3/2, and 5/2 within the
QCD sum-rule approach. First, we construct the currents for the particular configuration of …