CLAS physics database search results Measurement E209M35 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y Data errors Systematic errors GeV 1.64 -0.3164 0.0438 0.0177 1.72 -0.1106 0.0222 0.0173 1.8 -0.1288 0.0184 0.0174 1.88 -0.1817 0.0183 0.0174 1.96 -0.207 0.02 0.0175 2.04 -0.1051 0.0213 0.0173 2.12 -0.1043 0.0236 0.0173 2.2 -0.0936 0.0275 0.0173 2.28 -0.1641 0.0327 0.0174 2.36 -0.2317 0.0394 0.0175