Motivated by the [Formula presented] expansion, we present a simple model of [Formula presented] scattering as a sum of a current-algebra contact term and resonant pole exchanges. The model preserves crossing symmetry as well as unitarity up to 1.2 GeV. Key features include chiral dynamics, vector meson dominance, a broad low energy scalar ([Formula presented]) meson, and a Ramsauer-Townsend mechanism for the understanding of the 980 MeV region. We discuss in detail the regularization (corresponding to rescattering effects) necessary to make all these nice features work. © 1996 The American Physical Society.
Simple description of [Formula presented] scattering to 1 GeV / Harada, M.; Sannino, F.; Schechter, J.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 54:3(2004), pp. 1991-2004. [10.1103/PhysRevD.54.1991]
Simple description of [Formula presented] scattering to 1 GeV
Sannino F.;
2004
Abstract
Motivated by the [Formula presented] expansion, we present a simple model of [Formula presented] scattering as a sum of a current-algebra contact term and resonant pole exchanges. The model preserves crossing symmetry as well as unitarity up to 1.2 GeV. Key features include chiral dynamics, vector meson dominance, a broad low energy scalar ([Formula presented]) meson, and a Ramsauer-Townsend mechanism for the understanding of the 980 MeV region. We discuss in detail the regularization (corresponding to rescattering effects) necessary to make all these nice features work. © 1996 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
