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Measurement E209M13

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

Spokespersons: Daniel S. Carman

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 : 0.3 — 3.5 GeV2
W : 1.625 — 2.4 GeV
Ebeam : 6.535 GeV

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

Parameter (X axis): cos(θKc.m.),

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

Measured data:

cos(θKc.m.) P0y′ Data errors Systematic errors
-0.96 0.3638 0.5726 0.1228
-0.88 -0.38 0.1736 0.019
-0.8 -0.5734 0.141 0.1469
-0.72 -0.1103 0.1327 0.1292
-0.64 0.0715 0.1261 0.0784
-0.56 -0.0394 0.1202 0.0415
-0.48 0.2029 0.11 0.0754
-0.4 0.2469 0.1038 0.0643
-0.32 0.2845 0.093 0.0864
-0.24 0.1323 0.093 0.0479
-0.16 0.2969 0.0894 0.0936
-0.08 0.4516 0.0886 0.1347
0 0.5276 0.0878 0.1149
0.08 0.426 0.0898 0.0874
0.16 0.4341 0.0914 0.1256
0.24 0.4456 0.0965 0.1067
0.32 0.3752 0.0951 0.1518
0.4 0.5255 0.0968 0.0924
0.48 0.5266 0.0956 0.0197
0.56 0.6767 0.0969 0.079
0.64 0.6144 0.1065 0.1555
0.72 0.3198 0.114 0.0641
0.8 0.1556 0.1369 0.1492
0.88 0.1528 0.2295 0.1784
0.96 0.3823 0.4726 0.385