CLAS physics database search results Measurement E209M30 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y' Data errors Systematic errors GeV 1.64 0.1395 0.0469 0.0174 1.72 -0.1486 0.0244 0.0174 1.8 -0.1579 0.0248 0.0174 1.88 -0.1313 0.0297 0.0174 1.96 0.0372 0.0419 0.0173 2.04 0.1075 0.0613 0.0173 2.12 -0.0862 0.079 0.0173 2.2 -0.088 0.1105 0.0173 2.28 0.2485 0.1449 0.0175 2.36 0.7618 0.2371 0.0196