CLAS physics database search results Measurement E209M73 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y' Data errors Systematic errors GeV 1.72 0.4529 0.7846 0.0717 1.8 -0.508 0.3917 0.0717 1.88 0.4756 0.222 0.0717 1.96 0.9413 0.247 0.0724 2.04 0.9834 0.3402 0.0725 2.12 -0.7184 0.3303 0.072 2.2 -0.8143 0.2931 0.0721 2.28 -0.9552 0.3323 0.0724 2.36 -0.95 0.41 0.0724