CLAS physics database search results Measurement E209M45 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y' Stat. error Syst. error GeV 1.64 -0.3687 0.0918 0.0178 1.72 -0.3902 0.0407 0.0179 1.8 -0.533 0.0471 0.0184 1.88 -0.4621 0.0456 0.0182 1.96 -0.082 0.0517 0.0173 2.04 0.0164 0.0703 0.0173 2.12 0.2503 0.1193 0.0176 2.2 0.3854 0.1779 0.0179 2.28 0.5453 0.2003 0.0185 2.36 0.1573 0.2276 0.0174