CLAS Physics Database

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Measurement E209M8

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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 :	0.4 — 4.5 GeV²
W :	1.625 — 2.4 GeV
E_beam :	7.546 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
0.45	-0.3219	0.0159	0.0155
0.55	-0.3707	0.0126	0.0122
0.65	-0.4073	0.0133	0.0078
0.75	-0.437	0.0139	0.0136
0.85	-0.45	0.0147	0.0119
0.95	-0.4941	0.0159	0.0137
1.05	-0.4562	0.0171	0.0149
1.15	-0.4863	0.0191	0.0265
1.25	-0.4707	0.0202	0.0203
1.35	-0.4725	0.0208	0.0291
1.45	-0.4866	0.0231	0.0152
1.6	-0.4733	0.0175	0.0277
1.8	-0.4951	0.0208	0.017
2	-0.4517	0.0249	0.017
2.2	-0.5587	0.0289	0.015
2.4	-0.4866	0.0336	0.0261
2.65	-0.4787	0.033	0.043
2.95	-0.4676	0.0401	0.0293
3.3	-0.4717	0.0442	0.0286
4	-0.4157	0.0426	0.0122