Eta photoproduction near threshold

Conference · Wed Apr 10 04:00:00 EDT 1991 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:5609833

Benmerrouche, M; Mukhopadhyay, N C ^[1]

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1. Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12180-3590 (US)

The eta photoproduction near threshold has a number of similarities and differences in comparison to the pi-zero photoproduction near threshold. Both processes probe Born amplitudes involving the s- and u- channel nucleon exchanges. While eta production is also sensitive to the vector meson contribution in the t-chennel and excitation of several baryond resonances the pi-zero process is not. The former has a large s-channel {ital S}{sub 11} (1535) excitation amplitude, but the latter has a relatively small contribution from the {Delta}(1232) excitation. We discuss the implications of our analysis on the recent Bates data presented at this conference, and report the value of the {ital A}{sub 1/2} amplitude for the {ital S}{sub 11} {r arrow} {ital N}{sub {gamma}} transition that we can extract from the existing eta photoproduction experiments. The latter is of interest to the test of hadron models.

• OSTI ID: 5609833
• Report Number(s): CONF-9009332--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 221:1
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645300 -- High Energy Physics-- Particle Invariance Principles & Symmetries
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
CHIRAL SYMMETRY
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY
ETA MESONS
FUNCTIONS
HADRONS
INTERACTIONS
LAGRANGIAN FUNCTION
MESONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PHOTON-PROTON INTERACTIONS
PHOTOPRODUCTION
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
S CHANNEL
SYMMETRY
SYMMETRY BREAKING
T CHANNEL
THRESHOLD ENERGY
U CHANNEL
VECTOR MESONS