CLAS physics database search results Measurement E209M85 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y Data errors Systematic errors GeV 1.72 -0.0443 0.6473 0.0715 1.8 -0.9584 0.6137 0.0724 1.88 -0.3171 0.4509 0.0716 1.96 -0.9573 0.4103 0.0724 2.04 -0.977 0.5354 0.0724 2.12 -0.9587 0.5473 0.0724 2.2 -0.9598 0.4939 0.0724 2.28 -0.9591 0.4947 0.0724 2.36 -0.951 0.5652 0.0724