Double-polarization observable G in neutral-pion photoproduction off the proton
Creators
- Thiel, A.1
- Lang, M.1
- Afzal, F.1
- Beck, R.1
- Boese, S.1
- Funke, C.1
- Gottschall, M.1
- Gruener, M.1
- Hammann, C.1
- Hannappel, J.1
- Hartmann, J.1
- Hoffmeister, P.1
- Honisch, C.1
- Kaiser, D.1
- Kalinowsky, H.1
- Kalischewski, F.1
- Klassen, P.1
- Klempt, E.1
- Koop, K.1
- Kube, M.1
- Mahlberg, P.1
- Mueller, J.1
- Muellers, J.1
- Piontek, D.1
- Schmidt, C.1
- Seifen, T.1
- Sokhoyan, V.1
- Spieker, K.1
- Thoma, U.1
- Urban, M.1
- Pee, H. van1
- Walther, D.1
- Wendel, C.1
- Winnebeck, A.1
- Eberhardt, H.2
- Bantes, B.2
- Dutz, H.2
- Elsner, D.2
- Ewald, R.2
- Fornet-Ponse, K.2
- Frommberger, F.2
- Goertz, S.2
- Hammann, D.2
- Hillert, W.2
- Jude, T.2
- Kammer, S.2
- Kleber, V.2
- Klein, F.2
- Reeve, S.2
- Runkel, S.2
- Schmieden, H.2
- Anisovich, A.V.3, 1
- Bayadilov, D.3, 1
- Nikonov, V.3, 1
- Sarantsev, A.3, 1
- Bichow, M.4
- Meyer, W.4
- Reicherz, G.4
- Brinkmann, K.T.5, 6
- Gutz, E.5, 6
- Crede, V.7
- Dieterle, M.8
- Keshelashvili, I.8
- Krusche, B.8
- Witthauer, L.8
- Friedrich, S.5
- Makonyi, K.5
- Metag, V.5
- Nanova, M.5
- Gridnev, A.3
- Lopatin, I.3
- Wilson, A.7, 1
- The CBELSA/TAPS Collaboration
- 1. Universitaet Bonn, Helmholtz-Institut fuer Strahlen- und Kernphysik, Bonn (Germany)
- 2. Universitaet Bonn, Physikalisches Institut, Bonn (Germany)
- 3. Petersburg Nuclear Physics Institute, Gatchina (Russian Federation)
- 4. Ruhr-Universitaet Bochum, Institut fuer Experimentalphysik I, Bochum (Germany)
- 5. Universitaet Giessen, II. Physikalisches Institut, Giessen (Germany)
- 6. Universitaet Bonn, Helmholtz-Institut fuer Strahlen und Kernphysik, Bonn (Germany)
- 7. Florida State University, Department of Physics, Tallahassee, FL (United States)
- 8. Universitaet Basel, Institut fuer Physik, Basel (Switzerland)
Description
This paper reports on a measurement of the double-polarization observable G in π0 photoproduction off the proton using the CBELSA/TAPS experiment at the ELSA accelerator in Bonn. The observable G is determined from reactions of linearly polarized photons with longitudinally polarized protons. The polarized photons are produced by bremsstrahlung off a diamond radiator of well-defined orientation. A frozen spin butanol target provides the polarized protons. The data cover the photon energy range from 617 to 1325 MeV and a wide angular range. The experimental results for G are compared to predictions by the Bonn-Gatchina (BnGa), Juelich-Bonn (JueBo), MAID and SAID partial wave analyses. Implications of the new data for the pion photoproduction multipoles are discussed. (orig.)
Availability note (English)
Available from: http://dx.doi.org/10.1140/epja/i2017-12194-8Additional details
Identifiers
Publishing Information
- Journal Title
- European Physical Journal. A
- Journal Volume
- 53
- Journal Issue
- 1
- Journal Page Range
- p. 1-12
- ISSN
- 1434-6001
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 48038123
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ENERGY DEPENDENCE; EXPERIMENTAL DATA; GEV RANGE 01-10; MEV RANGE 100-1000; PHOTON-PROTON INTERACTIONS; PHOTOPRODUCTION; PIONS NEUTRAL; POLARIZATION-ASYMMETRY RATIO; POLARIZED BEAMS; POLARIZED TARGETS; PROTONS
- Descriptors DEC
- BARYONS; BASIC INTERACTIONS; BEAMS; BOSONS; DATA; DIMENSIONLESS NUMBERS; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; INFORMATION; INTERACTIONS; MESONS; MEV RANGE; NUCLEONS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PHOTON-BARYON INTERACTIONS; PHOTON-HADRON INTERACTIONS; PHOTON-NUCLEON INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; TARGETS
Optional Information
- Collaborations
- The CBELSA/TAPS Collaboration