CLAS physics database search results Measurement E195M88 CLAS12 RG-K Daniel S. Carman 2022 W P'_x' Data errors Systematic errors GeV 1.64 -0.13586 0.05767 0.02539 1.72 -0.15766 0.02738 0.0146 1.8 -0.14889 0.02663 0.01469 1.88 -0.22603 0.02928 0.01512 1.96 -0.19288 0.03286 0.01649 2.04 -0.1706 0.03667 0.01732 2.12 -0.24722 0.03798 0.01594 2.2 -0.20685 0.0398 0.01625 2.28 -0.21339 0.0436 0.01654 2.36 -0.2126 0.04574 0.01655