CLAS physics database search results Measurement E209M86 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y Data errors Systematic errors GeV 1.72 0.6927 0.6593 0.072 1.8 -0.6804 0.3012 0.0719 1.88 -0.957 0.1943 0.0724 1.96 -0.2961 0.2248 0.0716 2.04 -0.9465 0.3914 0.0724 2.12 0.7599 0.6589 0.0721 2.2 -0.9547 0.8037 0.0724 2.28 0.8257 0.7566 0.0722 2.36 -0.9008 0.8852 0.0723