The radiative decay of the axial-vector resonances into a pseudoscalar meson and a photon
is studied using the vector meson Lagrangian obtained from the hidden gauge symmetry …

A collective treatment of the I= 0 scalar mesons below 2 GeV [σ (550), f0 (980), f0 (1370), f0
(1500) and f0 (1710)] in a nonlinear chiral Lagrangian framework that is constrained by the …

There are attempts in the literature to theoretically explain the large breaking of isotopic
invariance in the decay η (1405)→ f 0 (980) π 0→ 3 π by the mechanism containing the …

The a 0 0 (980)-f 0 (980) mixing intensity has been predicted to be in the range of 0.01 to 0.2
by various theoretical models, but it lacks firm experimental observation. We examine the …

Isospin symmetry breaking is discussed as a tool for studying the nature and production
mechanisms of light scalar mesons. We are concerned with isospin breaking effects with an …

Various processes have been proposed previously to study a 0 0 (980)-f 0 (980) mixing
through the f 0 (980)→ a 0 0 (980) transition. Here we investigate in detail the difference …

We calculate the decay rates φ→ γπ0π0 and γπ0η in very good agreement with the recent
accurate experimental data. We also point out the necessity of a φγK 0K 0 contact vertex …

The high-precision cross section data for the reaction γ p→ K*+ Λ reported by the CLAS
Collaboration at the Thomas Jefferson National Accelerator Facility have been analyzed …

We perform a QCD sum-rule study of the open-charmed D s (2317) as a four-quark state.
Using the diquark-antidiquark picture for the four-quark state, we consider four possible …

The K+ and K 0 meson mass difference induces the mixing of the a 0 0 (980) and f 0 (980)
resonances, the amplitude of which, between the K+ K-and K 0 K¯ 0 thresholds, is large in …