CLAS Physics Database

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Measurement E209M2

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

Spokespersons: Daniel S. Carman

Publication:

D. S. Carman et al. (CLAS Collaboration) Recoil Polarization in K+Y Electroproduction in the Nucleon Resonance Region with CLAS12 // https://arxiv.org/abs/2505.12030

Quantity measured: P⁰_y′,
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
E_beam :	6.535 GeV

Observable quantity measured (Y axis): P⁰_y′,
Plot measurement data

Parameter (X axis): Q², GeV²

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

Measured data:

Q², GeV²	P⁰_y′	Data errors	Systematic errors
0.35	-0.3255	0.0089	0.0155
0.45	-0.427	0.0086	0.0125
0.55	-0.4301	0.0092	0.008
0.65	-0.3712	0.0102	0.0133
0.75	-0.4243	0.0109	0.0118
0.85	-0.4427	0.0117	0.0134
0.95	-0.4441	0.0128	0.0149
1.05	-0.4989	0.0137	0.0266
1.15	-0.487	0.0148	0.0204
1.25	-0.4889	0.0163	0.0291
1.35	-0.4698	0.0174	0.0151
1.45	-0.4574	0.0191	0.0276
1.6	-0.4644	0.0153	0.0169
1.8	-0.4625	0.0183	0.0171
2	-0.5197	0.0214	0.0148
2.2	-0.4955	0.0252	0.0262
2.4	-0.4885	0.0295	0.043
2.65	-0.4342	0.0286	0.0292
2.95	-0.3934	0.0347	0.0284
3.3	-0.4073	0.0386	0.0122