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Measurement E209M86

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Experiment: CLAS12 RG-K K+Y recoil polarization, 2025

Spokespersons: Daniel S. Carman

Measurement comment: cos(θKc.m.) bin: [-0.5: 0.0]

Publication:

Quantity measured: P0y,
y projection of recoil polarization P0; in (x,y,z) system
Beam: e, polarization: none
Target: p (Z=1, A=1), polarization: none
Final state: K+ Σ0, polarization: polarized

Q2 : 1 — 4.5 GeV2
W : 1.625 — 2.4 GeV
Ebeam : 7.546 GeV

Observable quantity measured (Y axis): P0y,
Plot measurement data

Parameter (X axis): W, GeV

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

Measured data:

W,
GeV
P0y Data errors Systematic errors
1.72 0.6927 0.6593 0.072
1.8 -0.6804 0.3012 0.0719
1.88 -0.957 0.1943 0.0724
1.96 -0.2961 0.2248 0.0716
2.04 -0.9465 0.3914 0.0724
2.12 0.7599 0.6589 0.0721
2.2 -0.9547 0.8037 0.0724
2.28 0.8257 0.7566 0.0722
2.36 -0.9008 0.8852 0.0723