{eta} meson photoproduction on hydrogen near threshold

Journal Article · Mon May 01 04:00:00 EDT 1995 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.51.R2283· OSTI ID:44663

Price, J W ^[1]; Anton, G; Arends, J; Beulertz, W; Bock, A; Breuer, M; Buechler, K ^[2]; Clajus, M ^[1]; Detemple, P; Hey, J; Kraemer, D; Meyer, W ^[2]; Nefkens, B M.K. ^[1]; Noeldeke, G; Schneider, W; Zucht, B ^[3]

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1. Department of Physics, University of California, Los Angeles, California 90024 (United States)
2. Physikalisches Institut der Universitaet Bonn, Nu/Sallee 12, Bonn (Germany)
3. Physikalisches Institut der Universitaet Bonn, Nu/Sallee 12, D-53115 Bonn (Germany)

The total cross section for {gamma}{ital p}{r_arrow}{eta}{ital p} near threshold has been measured using the PHOENICS tagging system at the ELSA electron facility of the Physikalisches Institut der Universitaet Bonn. The photons are created by bremsstrahlung, and are tagged by measuring the momentum of each electron after the photon has been emitted. The recoil proton from {gamma}{ital p}{r_arrow}{eta}{ital p} is detected by the AMADEUS counter setup in coincidence with the tagging system. Data were taken with AMADEUS at 3.3{degree} in the laboratory, where the large Jacobian increases our event rate so that we obtain the cross section from threshold ({ital E}{sub {gamma}}=707.2 MeV) to {ital E}{sub {gamma}}{congruent}720 MeV with adequate statistics. The {gamma}{ital p}{r_arrow}{eta}{ital p} events are identified by kinematics, {ital dE}/{ital dx}, and timing information. We find that in our energy region the production cross section is consistent with {ital S}-wave production.

• OSTI ID: 44663
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 51; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BREMSSTRAHLUNG
ETA MESONS
HYDROGEN 1 TARGET
PHOTONS
PHOTOPRODUCTION
RESONANCE
S WAVES
TOTAL CROSS SECTIONS