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 …

Very recently, the LHCb Collaboration reported the doubly charmed tetraquark state T cc+
below the D*+ D 0 threshold about 273 keV. As a very near-threshold state, its long-distance …

We study the heavy quarkonium within the basis light-front quantization approach. We
implement the one-gluon exchange interaction and a confining potential inspired by light …

In this article, we calculate the contributions of the vacuum condensates up to dimension-6
including the O (α _s) O (α s) corrections to the quark condensates in the operator product …

We examine e+ e-→ D sD s*+ and D s*-D s+ interactions at 4170 MeV using the CLEO-c
detector in order to measure the decay constant f D s+ with good precision. Previously our …

In this work, we revisit the isospin violating decays of X (3872) in a coupled-channel effective
field theory. In the molecular scheme, the X (3872) is interpreted as the bound state of D¯* 0 …

Stimulated by the exciting progress in the observation of new bottomonium states, we study
the bottomonium spectrum. To calculate the mass spectrum, we adopt a nonrelativistic …

We study the radiative decay of X (3872) based on the assumption that X (3872) is regarded
as acc‾ charmonium with quantum number JPC= 1++(J, P, C represent the spin, parity and …

The LHCb Collaboration has systematically measured the rates of B c→ J/ψ K, B c→ J/ψ D s,
B c→ J/ψ D s*, and B c→ ψ (2 S) π. The new data enable us to study relevant theoretical …

The mass spectra and wave functions of both 1 S and 2 S state heavy pseudoscalar (P) and
vector (V) mesons are analyzed within the light-front quark model. Important empirical …