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Measurement E209M1

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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+ Λ, 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 0.2182 0.1258 0.1978
-0.88 0.0053 0.0254 0.0305
-0.8 -0.0929 0.0166 0.0212
-0.72 -0.1982 0.0148 0.011
-0.64 -0.3185 0.0144 0.0054
-0.56 -0.4207 0.0141 0.026
-0.48 -0.5367 0.0148 0.015
-0.4 -0.5663 0.0151 0.0242
-0.32 -0.6314 0.0156 0.0113
-0.24 -0.6524 0.0155 0.0197
-0.16 -0.66 0.0153 0.0127
-0.08 -0.6421 0.0154 0.0245
0 -0.6449 0.0145 0.0121
0.08 -0.6024 0.0144 0.0231
0.16 -0.6008 0.0143 0.0089
0.24 -0.5718 0.0138 0.0124
0.32 -0.551 0.0135 0.0101
0.4 -0.5358 0.0129 0.0082
0.48 -0.5396 0.012 0.0115
0.56 -0.5 0.0117 0.0096
0.64 -0.4782 0.0113 0.0098
0.72 -0.4124 0.0112 0.0208
0.8 -0.4068 0.0115 0.0199
0.88 -0.3076 0.0126 0.0229
0.96 -0.1477 0.0163 0.0121