6 papers
The q-Deformed NJL Model "Revisited"
S. S. Avancini, J. R. Marinelli, D. P. Menezes +1
In this work we investigate the chiral symmetry breaking in the q-deformed version of the NJL Model and its consequent mass generation mechanism . We show that the deformation of t…
Quons as su(2) Irreducible Tensor Operators
S. S. Avancini, F. F. de Souza Cruz, J. R. Marinelli +1
We prove that, for the quon algebra, which interpolates between the Bose and Fermi statistics and depends on a free parameter q,it is possible to build an su(2) irreducible represe…
Optimized delta expansion for relativistic nuclear models
G. Krein, R. S. Marques de Carvalho, D. P. Menezes +2
The optimized -expansion is a nonperturbative approach for field theoretic models which combines the techniques of perturbation theory and the variational principle. This techni…
Exact Q-Deformed Dyson Expansion for the Nuclear J=5/2 Shell
S. S. Avancini, J. R. Marinelli, D. P. Menezes +2
The quon algebra, which interpolates between the Bose and Fermi algebras and depends on a free paramenter , is used to generate a deformed Dyson boson expansion of the quadrupol…
q- Deformed Boson Expansions
S. S. Avancini, F. F. de Souza Cruz, J. R. Marinelli +2
A deformed boson mapping of the Marumori type is derived for an underlying algebra. As an example, we bosonize a pairing hamiltonian in a two level space, for which an exac…
Studying medium effects with the optimized $\bdelta$ expansion
G. Krein, D. P. Menezes, M. Nielsen +1
The possibility of using the optimized expansion for studying medium effects on hadronic properties in quark or nuclear matter is investigated. The expansion is employed to…