Massless fermions in a bag at finite density and temperature

De Francia M.; Falomir H.; Loewe, M.


We introduce the chemical potential in a system of massless fermions in a bag by imposing boundary conditions in the Euclidean time direction. We express the fermionic mean number in terms of a functional trace involving the Green's function of the boundary value problem, which we study analytically. Numerical evaluations are made, and an application to a simple hadron model is discussed.

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Título de la Revista: Physical Review D
Volumen: 55
Número: 4
Editorial: American Physical Society
Fecha de publicación: 1997
Página de inicio: 2477
Página final: 2485