CLAS physics database search results Measurement E195M56 CLAS12 RG-K Daniel S. Carman 2022 W P'_x' Data errors Systematic errors GeV 1.64 -0.18194 0.03964 0.02194 1.72 -0.17821 0.01851 0.01414 1.8 -0.17867 0.01864 0.01419 1.88 -0.24237 0.02102 0.01464 1.96 -0.28698 0.02298 0.01593 2.04 -0.20796 0.02547 0.01643 2.12 -0.23417 0.02671 0.01593 2.2 -0.24765 0.02795 0.01599 2.28 -0.28432 0.03018 0.01628 2.36 -0.35035 0.0321 0.01637