CLAS Physics Database

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Measurement E209M12

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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): W, GeV

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

Measured data:

W, GeV	P⁰_y	Data errors	Systematic errors
1.64	-0.2532	0.0442	0.0442
1.66	-0.325	0.0287	0.0423
1.69	-0.2438	0.0222	0.0371
1.71	-0.2763	0.0177	0.0322
1.74	-0.2827	0.0175	0.0104
1.76	-0.2784	0.0173	0.0055
1.79	-0.2916	0.0176	0.0121
1.81	-0.2446	0.0182	0.0139
1.84	-0.2814	0.0184	0.0113
1.86	-0.291	0.0192	0.0398
1.89	-0.3683	0.0195	0.0124
1.91	-0.3295	0.0208	0.0088
1.94	-0.361	0.0216	0.0146
1.96	-0.3583	0.0229	0.0095
1.99	-0.3844	0.0236	0.008
2.01	-0.419	0.0249	0.0266
2.04	-0.4529	0.0254	0.017
2.06	-0.4144	0.0272	0.017
2.09	-0.3793	0.0276	0.0295
2.11	-0.4403	0.0288	0.0102
2.14	-0.4231	0.0299	0.0423
2.16	-0.4283	0.0308	0.034
2.19	-0.3991	0.0318	0.0171
2.21	-0.4153	0.0326	0.0368
2.24	-0.4821	0.0336	0.0387
2.26	-0.5025	0.0346	0.0308
2.29	-0.4448	0.0353	0.0148
2.31	-0.5032	0.0368	0.0312
2.34	-0.4508	0.0382	0.0188
2.36	-0.4757	0.0389	0.0238
2.39	-0.4394	0.0397	0.0258