CLAS physics database search results Measurement E209M61 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y' Data errors Systematic errors GeV 1.72 0.9524 0.5241 0.0724 1.8 0.9658 0.3818 0.0724 1.88 0.2047 0.2655 0.0715 1.96 0.957 0.2555 0.0724 2.04 0.95 0.3352 0.0724 2.12 0.3951 0.3751 0.0716 2.2 -0.1665 0.3313 0.0715 2.28 -0.677 0.3555 0.0719 2.36 -0.9795 0.4401 0.0724