CLAS physics database search results Measurement E195M49 CLAS12 RG-K Daniel S. Carman 2022 W P'_x' Data errors Systematic errors GeV 1.64 -0.17722 0.04808 0.01751 1.72 -0.24571 0.02616 0.01986 1.8 -0.21783 0.02385 0.02269 1.88 -0.22117 0.02044 0.02016 1.96 -0.24454 0.02084 0.02031 2.04 -0.20336 0.02836 0.02513 2.12 -0.14008 0.04285 0.03453 2.2 -0.22046 0.05537 0.04026 2.28 -0.10631 0.05968 0.03596 2.36 -0.02638 0.06895 0.03376