CLAS physics database search results Measurement E209M4 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 cos(theta_K^c.m.) P^0_y Data errors Systematic errors -0.96 0.5394 0.1149 0.0575 -0.88 0.2701 0.0255 0.0714 -0.8 0.1035 0.0173 0.067 -0.72 0.0827 0.0156 0.047 -0.64 0.0131 0.0151 0.0366 -0.56 -0.0458 0.0148 0.023 -0.48 -0.1584 0.0159 0.0386 -0.4 -0.1692 0.0159 0.0183 -0.32 -0.2712 0.0166 0.02 -0.24 -0.2363 0.0166 0.0155 -0.16 -0.3339 0.0163 0.0154 -0.08 -0.3804 0.0162 0.0143 0 -0.3914 0.0158 0.0215 0.08 -0.357 0.0156 0.0126 0.16 -0.3765 0.0149 0.011 0.24 -0.3717 0.0146 0.0132 0.32 -0.3855 0.0138 0.0314 0.4 -0.4006 0.0128 0.0148 0.48 -0.4397 0.0124 0.0309 0.56 -0.4604 0.0115 0.0225 0.64 -0.4927 0.0112 0.021 0.72 -0.5176 0.0109 0.0148 0.8 -0.5533 0.0111 0.0293 0.88 -0.5294 0.0133 0.026 0.96 -0.5334 0.0162 0.0175