Unitary coupled-channel analysis of diffractive production of the A/sub 1/ resonance

Journal Article · Mon Aug 01 04:00:00 EDT 1977 · Phys. Rev., D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.16.657· OSTI ID:7214076

Basdevant, J L; Berger, E L

Employing unitary coupled-channel J/sup P C/ = 1/sup + +/ partial-wave amplitudes for the rho..pi.. and KK-bar systems, we show that the mass dependence and phase variations of the diffractive data on ..pi..p ..-->.. (rho..pi..) p are indicative of the presence of an A/sub 1/ resonance whose mass and width we determine to be roughly 1.3 +- 0.15 GeV and 400 +- 100 MeV, respectively. Our unitary amplitudes incorporate the Deck backgrounds explicitly. The fits to the data are excellent. We point out some interesting quantities to be measured in the future in order to resolve remaining uncertainties.

• Research Organization: Laboratoire de Physique Theorique et Hautes Energies, Universite Pierre et Marie Curie, Paris, France
• OSTI ID: 7214076
• Journal Information: Phys. Rev., D; (United States), Journal Name: Phys. Rev., D; (United States) Vol. 16:3; 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
A RESONANCES
A1-1070 RESONANCES
AMPLITUDES
BOSONS
COUPLED CHANNEL THEORY
COUPLING CONSTANTS
CROSS SECTIONS
DECK EFFECT
DIFFRACTION MODELS
ELEMENTARY PARTICLES
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
KAONS
LIE GROUPS
MATHEMATICAL MODELS
MESON RESONANCES
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
PARTIAL WAVES
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE WIDTHS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
PSEUDOSCALAR MESONS
QUANTUM NUMBERS
RESONANCE PARTICLES
SCATTERING AMPLITUDES
STRANGE PARTICLES
SU GROUPS
SU-3 GROUPS
SYMMETRY GROUPS
TOTAL CROSS SECTIONS
UNITARITY