CLAS physics database search results Measurement E195M55 CLAS12 RG-K Daniel S. Carman 2022 W P'_x' Data errors Systematic errors GeV 1.64 -0.27926 0.04224 0.02538 1.72 -0.19414 0.02344 0.01506 1.8 -0.29135 0.02422 0.0149 1.88 -0.23388 0.02762 0.016 1.96 -0.31657 0.03179 0.01811 2.04 -0.26228 0.03468 0.01892 2.12 -0.22567 0.03949 0.01777 2.2 -0.24246 0.04269 0.01615 2.28 -0.37834 0.04918 0.01716 2.36 -0.33363 0.05778 0.01815