On the Density Dependent Nuclear Matter Compressibility (2007)
Dexheimer, V. A., Vasconcellos, C. A. Z., Bodmann, B. E. J.
In the present work we apply a quantum hadrodynamic effective model in the mean-field approximation to the description of neutron stars. We consider an adjustable derivative-coupling model and study...
Quark Model Estimates of the Structure of the Meson-N-N*(1535,1/2-) Transition Vertices (2006)
Dillig, M., Rocha, S. S., Marranghello, G. F., Luetz, E. F., Vasconcellos, C. A. Z.
We address an actual problem of baryon-resonance dominated meson-exchange processes in the low GeV regime, i.e. the phase and the structure of meson-NN* transition vertices. Our starting point is a...
Do glueballs contribute in heavy ion collisions? (2006)
Da Silva, M. L. L., Hadjimichef, D., Vasconcellos, C. A. Z., Bodmann, B. E. J.
In heavy ion collision simulations many hadron states and/or parton degrees of freedom are included in order to obtain the observables. Meson spectroscopy, for example, considers the $0^{++}$ meson...
Glueball decay in the Fock-Tani formalism (2005)
Da Silva, D. T., Da Silva, M. L. L., Hadjimichef, D., Vasconcellos, C. A. Z.
We investigate the two-meson decay modes for $f_0(1500)$. In this calculation we consider this resonance as a glueball. The Fock-Tani formalism is introduced to calculate the decay width.
Meson decay in the Fock-Tani Formalism (2005)
Da Silva, D. T., Da Silva, M. L. L., Hadjimichef, D., Vasconcellos, C. A. Z.
The Fock-Tani formalism is a first principle method to obtain effective interactions from microscopic Hamiltonians. Usually this formalism was applied to scattering, here we introduced it to...
Glueball-glueball scattering in a constituent gluon model (2004)
Da Silva, M. L. L., Hadjimichef, D., Vasconcellos, C. A. Z.
In this work we use a mapping technique to derive in the context of a constituent gluon model an effective Hamiltonian that involves explicit gluon degrees of freedom. We study glueballs with two...
Phase Transitions in Neutron Stars and Gravitational Wave Emission (2002)
Marranghello, G. F., Vasconcellos, C. A. Z., Pacheco, J. A. De Freitas
We review the detectability of gravitational waves generated by oscillations excited during a phase transition from hadronic matter to deconfined quark-gluon matter in the core of a neutron star....
Neutron stars in a class of non-linear relativistic models (2000)
Taurines, A. R., Vasconcellos, C. A. Z., Malheiro, M., Chiapparini, M.
We introduce in this work a class of relativistic models for nuclear matter and neutron stars which exhibits a parameterization, through mathematical constants, of the non-linear meson-baryon...