1996/11/30 by Z. Aouissat, P. Schuck, J. Wambach
Physics and Astronomy · #Black Holes and Theoretical Physics #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1016/s0375-9474(97)00047-x
published as Nucl.Phys. A618 (1997) 402-426 · 28 pages, Latex, (with minor corrections to some misprints in the appendix of the old version)
openalex publication_date 1997/06/01 · arxiv created 1997/10/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We present a non-perturbative method for the study of the O(N+1)-version of the linear sigma-model. Using boson-mapping techniques, in close analogy to those well-known for fermionic systems, we obtain a systematic 1/N-expansion for the Hamiltonian which is symmetry-conserving order by order. The leading order for the Hamiltonian is evaluated explicitly and we apply the method to ππ-scattering, in deriving the T-matrix to leading order.