Deng Wei-Zhen

Meson decays in an extended Nambu-Jona-Lasinio model with heavy quark flavors

In a previous work, we proposed an extended Nambu-Jona-Lasinio (NJL) model including heavy quark flavors. In this work, we will calculate strong and radiative decays of vector mesons in this extended NJL model, including light ρ, ω ,K ∗ , φ and heavy D ∗ ,D ∗ ,B ∗ ,B ∗.

Fine splitting in the charmonium spectrum with a channel coupling effect

We study the fine splitting in the charmomium spectrum in the quark model with the channel coupling effect, including DD, DD*, D*D* and DsDs, DsDs*, Ds*Ds* channels. The interaction for channel coupling is constructed from the current-current Lagrangian related to the color confinement and the one- gluon exchange potentials. By adopting the massive gluon propagator from the lattice calculation in the nonperturbative region, the coupling interaction is further simplified to four-fermion interaction. The numerical calculation still prefers the assignment 1++ of X(3872).

Dynamical study of the possible molecular state X(3872) with the s-channel one gluon exchange interaction

The recently observed X(3872) resonance, which is difficult to assign a conventional c charmonium state in the quark model, may be interpreted as a molecular state. Such a molecular state is a hidden flavor four quark state because of its charmonium-like quantum numbers. The s-channel one gluon exchange is an interaction which only acts in the hidden flavor multi-quark system. In this paper, we will study the X(3872) and other similiar hidden flavor molecular states in a quark model by taking into account the s-channel one gluon exchange interaction.The recently observed X(3872) resonance, which is difficult to be assigned a conventional cc̄ charmonium state in the quark model, may be interpreted as a molecular state. Such a molecular state is a hidden flavor four quark state because of its charmonium-like quantum numbers. The s-channel one gluon exchange is an interaction which only acts in the hidden flavor multi-quark system. In this paper, we will study the X(3872) and other similiar hidden flavor molecular states in a quark model by taking into account of the s-channel one gluon exchange interaction. ∗Electronic address: dwz@th.phy.pku.edu.cn

A note on Ξc(3055)+ and Ξc(3123)+*

Babar Collaboration announced two new excited charmed baryons

Study of the heavy molecular states in the quark model with meson exchange interaction

\Xi_c(3055)^+

Extended Quark Potential Model from Random Phase Approximation

and

Hamiltonian Approach to Meson Structure in Extended Nambu-Jona-Lasinio Model*

\Xi_c(3123)^+

Three-body force and the tetraquark interpretation of light scalar mesons

. We study their strong decays assuming they are D-wave states. Some assignments are excluded by comparing our numerical results with the experimental values of the total widths of

J{sup P}=1{sup +} udss tetraquark

\Xi_c(3055)^+

Radiative decays of decuplet baryons, {lambda}(1405) and {lambda}(1520) hyperons in the chiral quark model

and