Threshold eta photoproduction and the role of the S/sub 11/ resonance

Conference · Sun Nov 20 00:00:00 EST 1988 · AIP Conf. Proc.; (United States)

OSTI ID:6314224

Benmerrouche, M; Mikhopadhyay, N C

We study the reaction ..gamma..p..-->..etap with a view to examining the extraction of the ..gamma..N..-->..S/sub 11/ resonant amplitude. A difficulty to be overcome is the role of the background. We investigate it in the effective Lagrangian theory (ELT) and show that there is a large difference between pseudoscalar (PS) and pseudovector (PV) theories, as in the neutral pion case. We also study the importance of the vector meson exchanges in the t-channel and show that rho and ..omega.. contributions can be substantial. Finally, we make contact between ..gamma..p..-->..S/sub 11/ amplitude determinations from the extant analyses of the pion and eta photoproduction experiments.

• Research Organization: Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12180-3590
• OSTI ID: 6314224
• Report Number(s): CONF-8805142-; TRN: 89-009023
• Journal Information: AIP Conf. Proc.; (United States), Vol. 176:1; Conference: 3. international conference on the intersections between particle and nuclear physics, Rockport, ME, USA, 14 May 1988
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PHOTON-PROTON INTERACTIONS
PARTICLE PRODUCTION
BOSON-EXCHANGE MODELS
ETA MESONS
GEV RANGE 01-10
LAGRANGIAN FUNCTION
N-1535 BARYONS
SCATTERING AMPLITUDES
VECTOR MESONS
AMPLITUDES
BARYONS
BASIC INTERACTIONS
BOSONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FUNCTIONS
GEV RANGE
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
MESONS
N BARYONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PERIPHERAL MODELS
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
645201* - High Energy Physics- Particle Interactions & Properties-Theoretical- General & Scattering Theory