Higher nucleon resonances in exclusive ([gamma],[pi]N) reactions on nuclei

Journal Article · Wed Sep 01 00:00:00 EDT 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.60.034605· OSTI ID:6464502

Lee, F X; Bennhold, C ^[1]; Lee, F X ^[2]; Kamalov, S S ^[3]; Wright, L E ^[4]

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1. Center for Nuclear Studies, Department of Physics, The George Washington University, Washington, D.C. 20052 (United States)
2. Jefferson Laboratory, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States)
3. Institut fuer Kernphysik, Johannes Gutenberg-Universitaet, D-55099 Mainz (Germany)
4. Institute of Nuclear and Particle Physics, Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701 (United States)

We report calculations for exclusive pion photoproduction on nuclei beyond the first resonance region in the distorted wave impulse approximation. The elementary operator contains contributions from the resonances P[sub 33](1232), P[sub 11](1440), D[sub 13](1520), D[sub 33](1700), S[sub 11](1535), S[sub 11](1650), and F[sub 15](1680), in addition to the usual Born plus vector meson contributions. It gives a good description of single pion photoproduction data up to about 1.1 GeV. Final state interactions are incorporated via optical potentials and are found to be substantial in the coincidence cross sections, but insensitive to the photon asymmetry. Clear signatures of possible medium modifications of the D[sub 13] and F[sub 15] resonances are predicted under selected kinematics. [copyright] [ital 1999] [ital The American Physical Society]

• OSTI ID: 6464502
• Journal Information: Physical Review, C, Vol. 60:3; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
FINAL-STATE INTERACTIONS
OPTICAL MODELS
PHOTONUCLEAR REACTIONS
PHOTOPRODUCTION
PIONS
RESONANCE PARTICLES
BASIC INTERACTIONS
BOSONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
HADRONS
INTERACTIONS
MESONS
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PSEUDOSCALAR MESONS
663410* - Photonuclear Reactions & Photon Scattering- (1992-)