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eta. photoproduction from threshold through the S sub 11 (1535) resonance

Journal Article · · Physical Review Letters; (United States)
;  [1]
  1. Rensselaer Polytechnic Institute, Troy, New York (USA)
+ Show Author Affiliations
We study photoproduction of {eta} mesons off protons in the effective Lagrangian approach. Unlike the {pi}{sup 0} case, {eta} photoproduction at threshold is strongly dominated by resonance excitation. The quantity ({chi}{Gamma}{sub {eta}}){sup 1/2}{ital A}{sub 1/2}/{Gamma}{sub {ital T}}, characteristic of the photoexcitation of the {ital S}{sub 11}(1535) resonance and its decay into the {eta}-nucleon channel, of interest to hadron models, is determined to be (0.22{plus minus}0.02){times}10{sup {minus}3} MeV{sup {minus}1} from the existing data.
DOE Contract Number:
FG02-88ER40448
OSTI ID:
5185113
Journal Information:
Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 67:9; ISSN PRLTA; ISSN 0031-9007
Country of Publication:
United States
Language:
English

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Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645204 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BASIC INTERACTIONS
BORN APPROXIMATION
BOSONS
COUPLING CONSTANTS
ELECTRODYNAMICS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
HADRONS
HELICITY
INELASTIC SCATTERING
INTERACTIONS
LAGRANGIAN FIELD THEORY
LIE GROUPS
MESONS
MEV RANGE
MEV RANGE 100-1000
N BARYONS
N-1535 BARYONS
PARAMETRIC ANALYSIS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PHOTON-PROTON INTERACTIONS
PHOTOPRODUCTION
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
SCATTERING
SU GROUPS
SU-3 GROUPS
SYMMETRY GROUPS