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Measurement E209M9

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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 : 0.4 — 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
1.64 -0.4012 0.044 0.0263
1.66 -0.3051 0.0273 0.0222
1.69 -0.4477 0.0214 0.0194
1.71 -0.4591 0.0174 0.0172
1.74 -0.4799 0.0167 0.012
1.76 -0.5377 0.0166 0.0256
1.79 -0.5303 0.0169 0.013
1.81 -0.5658 0.0176 0.0088
1.84 -0.552 0.0178 0.0137
1.86 -0.5249 0.0184 0.0167
1.89 -0.4983 0.019 0.0094
1.91 -0.49 0.0202 0.0082
1.94 -0.4537 0.0213 0.0156
1.96 -0.4063 0.0229 0.0118
1.99 -0.4441 0.0233 0.0116
2.01 -0.4935 0.0246 0.018
2.04 -0.5067 0.0253 0.0176
2.06 -0.4867 0.0269 0.0102
2.09 -0.4931 0.0274 0.0101
2.11 -0.4911 0.0288 0.0197
2.14 -0.454 0.0298 0.0105
2.16 -0.4348 0.031 0.0096
2.19 -0.4729 0.0314 0.0109
2.21 -0.4612 0.0324 0.0126
2.24 -0.4248 0.0342 0.0088
2.26 -0.3861 0.0351 0.0118
2.29 -0.3147 0.0361 0.01
2.31 -0.3077 0.0379 0.0202
2.34 -0.3014 0.0393 0.0103
2.36 -0.3763 0.0398 0.0168
2.39 -0.3395 0.0406 0.0146