Ghost-pole subtraction and the sigma-exchange NN potential

Journal Article · Tue Jul 01 04:00:00 EDT 1980 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.22.229· OSTI ID:5327162

Lomon, E L

The summing of all pion bubble graphs in the computation of the sigma-meson propagator leads to the appearance of ghost poles when sigma..pi pi.. coupling strengths are equivalent to sigma-meson decay widths greater than 625.2 MeV. A result satisfying dispersion relations is obtained by the direct subtraction of the ghost pole from the results published previously by this author. The effect is to decrease the sensitivity to the sigma-meson width of both the central and spin-orbit nucleon-nucleon potentials. The potentials are small for separations greater than half a pion Compton wavelength and decrease in magnitude with increasing width. Larger widths are more compatible with phenomenological and dispersion-theory potentials.

• Research Organization: Center for Theoretical Physics, Laboratory for Nuclear Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• DOE Contract Number: EY-76-C-02-3069
• OSTI ID: 5327162
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 22:1; ISSN PRVDA
• Country of Publication: United States
• Language: English

Related Subjects

645204* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BOUND STATE
COUPLING
DECAY
DISPERSION RELATIONS
ELEMENTARY PARTICLES
EXCHANGE INTERACTIONS
GELL-MANN THEORY
HADRONS
INTERACTIONS
INTERMEDIATE COUPLING
L-S COUPLING
MESON RESONANCES
MESONS
NUCLEON-NUCLEON POTENTIAL
PARTICLE DECAY
PERTURBATION THEORY
PIONS
POTENTIALS
PROPAGATOR
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
SIGMA-410 RESONANCES