4 papers
A q-deformed NJL model at finite temperature: chiral symmetry restoration and pion properties
V. S. Timoteo, C. L. Lima
We review the implementation of a q-deformed fermionic algebra in the Nambu--Jona-Lasinio model (NJL). The gap equations obtained from a deformed condensate as well as from the def…
Quantum spin tunneling in a soluble quasi-spin model: An angle-based potential description
D. Galetti, C. L. Lima, B. M. Pimentel
We propose an approach which allows to construct and use a potential function written in terms of an angle variable to describe interacting spin systems. We show how this can be im…
Are there thin accretion disks?
Cesar Meirelles Filho, Celso Luiz Lima, Hideaki Miyake
Total and internal energy requirements set constraints on the allowable temperature on the disk. In a gas pressure dominated disk, they lead to a cooling rate that decreases with t…
Mass formula for T=0 and T=1 ground states of N=Z nuclei
E. Baldini-Neto, C. L. Lima, P. Van Isacker
An algebraic model is developed to calculate the T=0 and T=1 ground state binding energies for N=Z nuclei. The method is tested in the sd shell and is then extended to 28-50 shell…