CLAS Physics Database

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Measurement E209M5

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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	Stat. error	Syst. error
0.35	-0.4767	0.0086	0.0125
0.45	-0.4561	0.0086	0.0121
0.55	-0.472	0.0096	0.007
0.65	-0.388	0.0103	0.0082
0.75	-0.3673	0.0111	0.0053
0.85	-0.3506	0.012	0.0075
0.95	-0.3495	0.0132	0.0075
1.05	-0.3743	0.0143	0.0127
1.15	-0.3523	0.0153	0.0164
1.25	-0.3592	0.0167	0.0201
1.35	-0.3469	0.0179	0.0084
1.45	-0.3694	0.0196	0.0088
1.6	-0.3684	0.0156	0.0074
1.8	-0.3597	0.0189	0.0123
2	-0.3245	0.0224	0.0065
2.2	-0.2824	0.0259	0.0147
2.4	-0.2916	0.0305	0.0312
2.65	-0.261	0.0294	0.0251
2.95	-0.2904	0.0353	0.0088
3.3	-0.2827	0.0394	0.0171