Published March 2010 | Version v1
Journal article Metadata-only

Radiative π0 photoproduction on protons in the Δ+ (1232) region

Creators

  • 1. Rheinische Friedrich-Wilhelms-Universitaet Bonn, Helmholtz-Institut fuer Strahlen- und Kernphysik, Bonn (Germany)
  • 2. Johannes Gutenberg-Universitaet Mainz, Institut fuer Kernphysik, Mainz (Germany)
  • 3. Universitaet Basel, Institut fuer Physik, Basel (Switzerland)
  • 4. University of Glasgow, Department of Physics and Astronomy, Glasgow (United Kingdom)
  • 5. Petersburg Nuclear Physics Institute, Gatchina (Russian Federation)
  • 6. INFN Sezione di Pavia, Pavia (Italy)
  • 7. University of Edinburgh, School of Physics, Edinburgh (United Kingdom)
  • 8. The George Washington University, Center for Nuclear Studies, Washington, D.C. (United States)
  • 9. University of California at Los Angeles, Los Angeles, CA (United States)
  • 10. Lebedev Physical Institute, Moscow (Russian Federation)
  • 11. Justus Liebig-Universitaet Giessen, II. Physikalisches Institut, Giessen (Germany)
  • 12. Mount Allison University, Sackville, NB (Canada)
  • 13. Institute for Nuclear Research, Moscow (Russian Federation)
  • 14. Rudjer Boskovic Institute, Zagreb (Croatia)
  • 15. Kent State University, Kent, OH (United States)
  • 16. The Catholic University of America, Washington, D.C. (United States)

Description

The reaction γp→pπ0γ' has been measured with the Crystal Ball/TAPS detectors using the energy-tagged photon beam at the electron accelerator facility MAMI-B. Energy and angular differential cross-sections for the emitted photon γ' and angular differential cross-sections for the π0 have been determined with high statistics in the energy range of the Δ+ (1232)-resonance. Cross-sections and the ratio of the cross-section to the nonradiative process γp→pπ 0 are compared to theoretical reaction models, having the anomalous magnetic moment κ Δ as free parameter. As the shape of the experimental distributions is not reproduced in detail by the model calculations, currently no extraction of κΔ is feasible. (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1140/epja/i2010-10925-y

Additional details

Identifiers

DOI
10.1140/epja/i2010-10925-y;

Publishing Information

Journal Title
European Physical Journal. A
Journal Volume
43
Journal Issue
3
Journal Page Range
p. 269-282
ISSN
1434-6001

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
41038603
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ANGULAR DISTRIBUTION; BRANCHING RATIO; ENERGY SPECTRA; EXCITATION FUNCTIONS; EXPERIMENTAL DATA; GAMMA SPECTRA; INTEGRAL CROSS SECTIONS; MEV RANGE 100-1000; PHOTON-PROTON INTERACTIONS; PHOTONS; PHOTOPRODUCTION; PIONS NEUTRAL; PROTONS
Descriptors DEC
BARYONS; BASIC INTERACTIONS; BOSONS; CROSS SECTIONS; DATA; DIFFERENTIAL CROSS SECTIONS; DIMENSIONLESS NUMBERS; DISTRIBUTION; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; FUNCTIONS; HADRONS; INFORMATION; INTERACTIONS; MASSLESS PARTICLES; MESONS; MEV RANGE; NUCLEONS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PHOTON-BARYON INTERACTIONS; PHOTON-HADRON INTERACTIONS; PHOTON-NUCLEON INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; SPECTRA

Optional Information

Collaborations
Crystal Ball at MAMI, TAPS and A2 Collaborations