Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-12-14
Phys.Rev. D54 (1996) 7867-7878
Physics
High Energy Physics
High Energy Physics - Phenomenology
31 pages, latex, 3 figures. The previous section 5 has been split into sections 5 and 6
Scientific paper
10.1103/PhysRevD.54.7867
A time-dependent projection technique is used to treat the initial-value problem for self-interacting fermionic fields. On the basis of the general dynamics of the fields, we derive formal equations of kinetic type for the set of one-body dynamical variables. A nonperturbative mean-field expansion can be written for these equations. We treat this expansion in lowest order, which corresponds to the Gaussian mean-field approximation, for a uniform system described by the Chiral Gross-Neveu Hamiltonian. Standard stationary features of the model, such as dynamical mass generation due to chiral symmetry breaking and a phenomenon analogous to dimensional transmutation, are reobtained in this context. The mean-field time evolution of non-equilibrium initial states is discussed.
Natti Paulo Laerte
Piza F. R. de A. T.
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