ar X iv : h ep - p h / 00 05 19 0 v 1 1 8 M ay 2 00 0 1 Covariant Quark - Representation of Composite Meson Systems and Chiral Symmetry

ar X iv : h ep - p h / 00 05 10 2 v 1 1 1 M ay 2 00 0 1 Semi - Leptonic B Meson Decays to Excited D Mesons in the Covariant Oscillator Quark Model

The spectra and branching ratios of the weak semi-leptonic B meson decays to the first excited D mesons are predicted, taking into account the confined effects of quarks using the covariant oscillator quark model (COQM). In the COQM the same relation between general weak transition form factors as that in HQET is derived, and the concrete form of the IsgurWise function is given with no free par...

ar X iv : h ep - p h / 02 05 01 6 v 1 2 M ay 2 00 2 Scalar a 0 ( 980 ) meson in φ → π 0 ηγ decay

ar X iv : h ep - p h / 02 05 25 1 v 1 2 2 M ay 2 00 2 Strange quark matter in a chiral SU ( 3 ) quark mean field model

We apply the chiral SU(3) quark mean field model to investigate strange quark matter. The stability of strange quark matter with different strangeness fraction is studied. The interaction between quarks and vector mesons destabilizes the strange quark matter. If the strength of the vector coupling is the same as in hadronic matter, strangelets can not be formed. For the case of β equilibrium, t...

ar X iv : h ep - p h / 05 08 26 4 v 2 1 1 N ov 2 00 5 Scalar σ meson at finite temperature in nonlocal quark model

Properties and temperature behavior of π and σ bound states are studied in the framework of the nonlocal model with a separable interaction kernel based on the quark Dyson-Schwinger and the meson Bethe-Salpeter equations. Mπ(T ), fπ(T ), Mσ(T ) and Γσ→ππ(T ) are considered above and below the deconfinement and chiral restoration transitions.

ar X iv : h ep - p h / 04 12 14 0 v 1 1 0 D ec 2 00 4 Charm meson resonances in D → P l ν decays

Motivated by recent experimental results we reconsider semileptonic D → P ℓν ℓ decays within a model which combines heavy quark symmetry and properties of the chiral Lagrangian. We include all observed charm meson resonances in our Lagrangian and determine their impact on the charm meson semileptonic form factor F+. We find that the inclusion of recently discovered charm resonances in the model...