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Measurement E17M67

Experiment: E89-004 Photoproduction of Hyperons
Year: 2005

Experiment comment:

The given error bars are statistical. The overall systematic uncertainty in these results was estimated to be +-8.0% for most bins. In the forward-most angle bin the uncertainty is +-11%. All known corrections were applied to the yield extraction, normalization, and acceptance calculations. No renormalization to any other cross sections was made; the measurement was absolute. The data are the thesis work of Robert Bradford (May, 2005), and this thesis is available on the CLAS web site. An alternate source of this data is to email schumacher@cmu.edu for a compact text file with all the information. Correlated data on W & cos(theta) distribution are available in E17M74 measurement.
Spokesperson: R. A. Schumacher
Reaction: γp → K+ Σ0
Polarization: beam (circular), final
Quantity: dσ/dcos(θK+)
W: 2.478 GeV
Eγ: 2.803 GeV
Publications:
R. Bradford, R. A. Schumacher, J. W. C. McNabb, L. Todor & CLAS Collaboration Differentail Cross Sections fro gamma p --> K+ Y for Lambda and Sigma0 Hyperons // Physical Review C 73, 035202 (2006)
J. W. C. McNabb, R. A. Schumacher, L .Todor & CLAS Collaboration Hyperon Photoproduction in the Nucleon Resonance Region // Physical Review C 69, 042201 (2004)

Measurement data
cos(θK+) dσ/dcos(θK+), [μb] uncertainty
-0.8 0.158 0.057
-0.7 0.142 0.027
-0.6 0.122 0.023
-0.5 0.091 0.02
-0.4 0.068 0.017
-0.3 0.054 0.017
-0.2 0.047 0.005
-0.1 0.094 0.016
0.0 0.035 0.016
0.1 0.026 0.011
0.2 0.025 0.01
0.3 0.123 0.022
0.4 0.145 0.027
0.5 0.334 0.043
0.6 0.469 0.06
0.7 0.795 0.055
0.8 0.968 0.095
0.9 1.426 0.225
Created in SINP MSU, CLAS Collaboration