Target asymmetry for neutral π meson photoproduction on polarized protons at 4 GeV in the forward direction

The asymmetry A = (σ +−σ −) (σ ++σ −) of the reaction γp↑↓ → π 0p was measured at the Deutsches Elektronen Synchrotron DESY, Hamburg at a mean photon energy of 4.0 GeV in the four-momentum transfer range 0.2 (GeV/ c) 2 ⩽ −t ⩽ 1.1 (GeV/ c) 2 in steps of approximately 0.08 (GeV/ c) 2. The π 0-meson an...

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Bibliographic Details
Published in:Physics letters. B 1973-01, Vol.46 (1), p.131-134
Main Authors: Bienlein, H., Braunschweig, W., Dinter, H., Erlewein, W., Frese, H., Knütel, J., Lübelsmeyer, K., Mango, S., Meyer-Wachsmuth, H., Morehouse, C.C., Paul, L., Schmitz, D., Schultz Von Dratzig, A.
Format: Article
Language:English
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Summary:The asymmetry A = (σ +−σ −) (σ ++σ −) of the reaction γp↑↓ → π 0p was measured at the Deutsches Elektronen Synchrotron DESY, Hamburg at a mean photon energy of 4.0 GeV in the four-momentum transfer range 0.2 (GeV/ c) 2 ⩽ −t ⩽ 1.1 (GeV/ c) 2 in steps of approximately 0.08 (GeV/ c) 2. The π 0-meson and the proton were detected in coincidence. The asymmetry is compatible with zero in the t-range 0.2 (GeV/ c) 2 ⩽ − t ⩽ 0.4 (GeV/ c) 2 and negative in the t-range ⩾ 0.5 (GeV/ c) 2.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(73)90497-8