A. Gokalp

Quantum statistical effects on fusion dynamics of heavy ions

In order to describe the fusion of two very heavy nuclei at near barrier energies, a generalized Langevin approach is proposed, which incorporates the quantum statistical fluctuations in accordance with the fluctuation and dissipation theorem. It is illustrated that the quantum statistical effects introduce an enhancement of the formation of compound nucleus, though the quantum enhancement is somewhat less pronounced as indicated in the previous calculations.

Collisional Damping of Nuclear Collective Vibrations in a Non-Markovian Transport Approach ∗

A detailed derivation of the collisional widths of collective vibrations is presented in both quantal and semiclassical frameworks by considering the linearized limits of the extended time-dependent Hartree-Fock and the Boltzmann-Uehling-Uhlenbeck model with a non-Markovian binary collision term. Damping widths of giant dipole and giant quadrupole excitations are calculated by employing an effective Skyrme force, and the results are compared with giant dipole resonance measurements in lead and tin nuclei at finite temperature. {copyright} {ital 1998} {ital The American Physical Society}

The decay ρ0→π0π0γ and the role of σ-meson

We study the radiative decay

The role of σ-meson in ω→ππγ decays and the coupling constant gωσγ

\rho^{0}\to\pi^{0}\pi^{0}\gamma

On the collisional damping of giant dipole resonance

within the framework of a phenomenological approach in which the contributions of

An analysis of f0–σ mixing in light cone QCD sum rules

\sigma

Vector meson dominance, chiral loops,σmeson, andω−ρmixing inω→π0π0γdecay

-meson and

Coupling constants \(g_{a_0\omega\gamma}\) and \(g_{a_0\rho\gamma}\) as derived from QCD sum rules

\omega

Scalar sigma meson effects in radiative rho0 meson decays

-meson intermediate states and of the pion-loops are considered. We conclude that the

Scalar

\sigma