CLAS physics database search results Measurement E209M88 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y Data errors Systematic errors GeV 1.72 -0.09 0.2329 0.0715 1.8 0.1165 0.4125 0.0715 1.88 -0.4249 0.3484 0.0717 1.96 -0.7875 0.4498 0.0721 2.04 -0.9828 0.4538 0.0725 2.12 0.4758 0.5802 0.0717 2.2 -0.18 0.5458 0.0715 2.28 0.4823 0.496 0.0717 2.36 0.2646 0.4623 0.0716