CLAS Physics Database

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Measurement E209M11

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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	-0.4605	0.0156	0.0124
0.55	-0.4333	0.0126	0.012
0.65	-0.3924	0.0133	0.0062
0.75	-0.4135	0.0141	0.0084
0.85	-0.3722	0.0152	0.0054
0.95	-0.347	0.0163	0.0074
1.05	-0.3483	0.0177	0.0075
1.15	-0.3424	0.0188	0.0125
1.25	-0.3614	0.0202	0.0164
1.35	-0.3146	0.0215	0.02
1.45	-0.3515	0.0241	0.0085
1.6	-0.3559	0.018	0.0087
1.8	-0.3079	0.0211	0.007
2	-0.2866	0.0256	0.012
2.2	-0.2331	0.0304	0.0059
2.4	-0.2493	0.0348	0.0146
2.65	-0.3029	0.0339	0.0312
2.95	-0.2749	0.0418	0.0251
3.3	-0.2874	0.0453	0.0088
4	-0.2437	0.0434	0.017