CLAS physics database search results Measurement E209M83 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y Stat. error Syst. error GeV 1.72 -0.1774 0.7933 0.0715 1.8 -0.3794 0.2271 0.0716 1.88 -0.7187 0.1464 0.072 1.96 -0.2431 0.1683 0.0715 2.04 0.3221 0.2045 0.0716 2.12 0.1095 0.2349 0.0715 2.2 -0.1567 0.2708 0.0715 2.28 -0.5122 0.2846 0.0717 2.36 0.3175 0.3328 0.0716