CLAS physics database search results Measurement E209M48 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y' Data errors Systematic errors 1.64 -0.0194 0.0606 0.0173 1.72 -0.1273 0.0208 0.0174 1.8 -0.1122 0.0213 0.0173 1.88 -0.1164 0.0241 0.0173 1.96 -0.1974 0.0282 0.0175 2.04 -0.2592 0.032 0.0176 2.12 -0.2396 0.0332 0.0175 2.2 -0.1803 0.036 0.0174 2.28 -0.1672 0.0396 0.0174 2.36 -0.225 0.0427 0.0175