CLAS physics database search results Measurement E209M58 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y' Data errors Systematic errors GeV 1.72 -0.9526 0.7111 0.0724 1.8 0.4935 0.1248 0.0717 1.88 0.6843 0.0723 0.072 1.96 0.2785 0.0834 0.0716 2.04 -0.21 0.1323 0.0715 2.12 -0.0791 0.1783 0.0715 2.2 0.2877 0.2176 0.0716 2.28 -0.0534 0.2686 0.0715 2.36 -0.0194 0.3507 0.0715