CLAS physics database search results Measurement E209M67 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y' Data errors Systematic errors GeV 1.72 -0.2444 0.7668 0.0715 1.8 -0.4789 0.1619 0.0717 1.88 -0.5568 0.0895 0.0718 1.96 -0.1552 0.0943 0.0715 2.04 0.0855 0.1123 0.0715 2.12 0.0616 0.1246 0.0715 2.2 -0.0464 0.1381 0.0715 2.28 -0.2252 0.1613 0.0715 2.36 -0.2993 0.1915 0.0716