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Measurement E17M40

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Experiment: E89-004 Photoproduction of Hyperons, 2005

Spokespersons: R. A. Schumacher

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.

Publications:

Quantity measured: dσ/dcos(θK+), mcbn
Differential cross section, where cos(θK+) is cosine of the K+ meson azimuthal angle in CMS.
Beam: γ, polarization: circular
Target: p (Z=1, A=1), polarization: none
Final state: K+ Σ0, polarization: polarized

W : 2.185 GeV
Eγ : 2.076 GeV

Observable quantity measured (Y axis): dσ/dcos(θK+), mcbn
Plot measurement data

Parameter (X axis): cos(θK+), dimensionless

Click here to get data in text file, delimited with tabs.

Measured data:

cos(θK+),
dimensionless
dσ/dcos(θK+),
mcbn
Data errors,
mcbn
-0.8 0.345 0.051
-0.7 0.304 0.033
-0.6 0.186 0.021
-0.5 0.118 0.019
-0.4 0.1 0.016
-0.3 0.145 0.017
-0.2 0.209 0.022
-0.1 0.229 0.024
0 0.304 0.023
0.1 0.44 0.028
0.2 0.517 0.031
0.3 0.61 0.035
0.4 0.672 0.036
0.5 0.875 0.04
0.6 1.032 0.055
0.7 1.235 0.068
0.8 1.066 0.06
0.9 0.938 0.091