Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-03-10
Nucl.Phys. A642 (1998) 210
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, LaTeX, 3 figures
Scientific paper
10.1016/S0375-9474(98)00518-1
Using the concept of dynamical mappings, two symmetry conserving nonperturbative approaches are presented. The first is based on the 1/N-expansion and sorted out using Holstein-Primakoff mapping. The second consists of dynamically mapping the canonical fields into the corresponding currents. It is argued, either by comparing the Fock spaces or the observables, that the latter constitutes a higher approach which transcends the 1/N-expansion and contains the dynamics generated by the Gaussian functional approach.
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