CLAS physics database search results Measurement E209M55 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y Stat. error Syst. error GeV 1.64 0.0145 0.0697 0.0173 1.72 -0.0076 0.0283 0.0173 1.8 -0.051 0.0289 0.0173 1.88 -0.1221 0.0343 0.0174 1.96 -0.0333 0.0424 0.0173 2.04 -0.0442 0.0471 0.0173 2.12 -0.0398 0.0541 0.0173 2.2 -0.0489 0.061 0.0173 2.28 -0.0576 0.0697 0.0173 2.36 -0.0788 0.079 0.0173