CLAS Physics Database

Measurement E209M2

Experiment: CLAS12 RG-K K+Y recoil polarization
Year: 2025
Spokesperson: Daniel S. Carman
Reaction: ep → K+ Λ
Polarization: final
Quantity: P0y′
Q2: 0.3 — 3.5 GeV2
W: 1.625 — 2.4 GeV
Ebeam: 6.535 GeV
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

Measurement data
Q2, [GeV2] P0y′ uncertainty
0.35 -0.3255 0.0089
0.45 -0.427 0.0086
0.55 -0.4301 0.0092
0.65 -0.3712 0.0102
0.75 -0.4243 0.0109
0.85 -0.4427 0.0117
0.95 -0.4441 0.0128
1.05 -0.4989 0.0137
1.15 -0.487 0.0148
1.25 -0.4889 0.0163
1.35 -0.4698 0.0174
1.45 -0.4574 0.0191
1.6 -0.4644 0.0153
1.8 -0.4625 0.0183
2.0 -0.5197 0.0214
2.2 -0.4955 0.0252
2.4 -0.4885 0.0295
2.65 -0.4342 0.0286
2.95 -0.3934 0.0347
3.3 -0.4073 0.0386