CLAS Physics Database

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Measurement E209M18

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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⁺ Σ⁰, 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): W, GeV

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

Measured data:

W, GeV	P⁰_y	Data errors	Systematic errors
1.74	0.681	0.3276	0.4326
1.76	0.3929	0.1848	0.1328
1.79	0.3464	0.1328	0.1274
1.81	-0.0973	0.1063	0.1918
1.84	0.1709	0.0861	0.0465
1.86	0.2191	0.08	0.1523
1.89	0.2137	0.0781	0.0229
1.91	0.0939	0.0704	0.0495
1.94	-0.0538	0.0725	0.0788
1.96	0.241	0.0802	0.0659
1.99	0.1456	0.09	0.0601
2.01	0.2676	0.0945	0.1242
2.04	0.4057	0.1014	0.0395
2.06	0.5049	0.1076	0.0937
2.09	0.446	0.1114	0.0749
2.11	0.377	0.1135	0.0958
2.14	0.4	0.1166	0.0864
2.16	0.2821	0.1221	0.1295
2.19	0.1208	0.1255	0.0985
2.21	0.1963	0.1439	0.099
2.24	-0.0092	0.1229	0.1214
2.26	-0.1935	0.1227	0.0932
2.29	0.1973	0.1255	0.0804
2.31	0.2725	0.1296	0.1676
2.34	0.1424	0.1484	0.0466
2.36	0.1309	0.1413	0.0485
2.39	-0.4709	0.1482	0.2602