Cloudy bag model, the ''sigma'' meson, and. pi. N scattering

Journal Article · Sat Mar 01 04:00:00 EST 1986 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.33.1509· OSTI ID:6098875

Cooper, E D; Jennings, B K

Although the cloudy bag model (CBM) can describe quite well p-wave ..pi..N scattering it has heretofore been unable to describe the energy dependence of the s-wave phase shifts. This problem is not unique to the CBM; it shows up dramatically in meson-exchange calculations. In this work it is shown that two higher-order graphs in the CBM, which cancel in the soft-pion limit, can cure this problem. One of the two graphs has properties similar to the exchange of a fictitious ''sigma'' meson and provides long-range attraction. The other term, usually not included in meson-exchange potentials, provides short-range repulsion.

• Research Organization: TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada
• OSTI ID: 6098875
• Journal Information: Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 33:5; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645206* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions
Baryon No. = 1-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BAG MODEL
BOSON-EXCHANGE MODELS
COMPOSITE MODELS
EXTENDED PARTICLE MODEL
FUNCTIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
LAGRANGIAN FUNCTION
MATHEMATICAL MODELS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
OBE MODEL
PARTIAL WAVES
PARTICLE INTERACTIONS
PARTICLE MODELS
PERIPHERAL MODELS
PHASE SHIFT
PION-NUCLEON INTERACTIONS
QUARK MODEL
S WAVES
SIGMA MODEL