CLAS physics database search results Measurement E195M52 CLAS12 RG-K Daniel S. Carman 2022 W P'_x' Data errors Systematic errors GeV 1.64 -0.07708 0.05548 0.02312 1.72 -0.12341 0.02773 0.01501 1.8 -0.14881 0.02591 0.01511 1.88 -0.13534 0.02517 0.01506 1.96 -0.1697 0.02318 0.01497 2.04 -0.16153 0.02255 0.01503 2.12 -0.15973 0.02135 0.01535 2.2 -0.17931 0.02013 0.0156 2.28 -0.20745 0.02052 0.01653 2.36 -0.25927 0.02106 0.01694