CLAS physics database search results Measurement E195M50 CLAS12 RG-K Daniel S. Carman 2022 W P'_x' Data errors Systematic errors GeV 1.64 -0.20849 0.03191 0.01627 1.72 -0.15191 0.0189 0.01589 1.8 -0.18495 0.01898 0.01802 1.88 -0.20383 0.02017 0.02401 1.96 -0.23264 0.02487 0.02955 2.04 -0.20036 0.03275 0.03354 2.12 -0.11136 0.04297 0.03711 2.2 -0.00953 0.06078 0.04582 2.28 -0.14314 0.07511 0.04679 2.36 -0.3201 0.10951 0.05557