CLAS physics database search results Measurement E209M54 CLAS12 RG-K K+Y recoil polarization Daniel S. Carman 2025 W P^0_y Data errors Systematic errors 1.64 0.0668 0.0717 0.0173 1.72 0.0738 0.0339 0.0173 1.8 0.0759 0.0334 0.0173 1.88 -0.0027 0.0396 0.0173 1.96 0.0351 0.0569 0.0173 2.04 0.0085 0.0819 0.0173 2.12 0.2095 0.108 0.0175 2.2 -0.0387 0.1493 0.0173 2.28 0.4397 0.2013 0.0181 2.36 0.6737 0.2916 0.0191