CLAS physics database search results Measurement E195M58 CLAS12 RG-K Daniel S. Carman 2022 W P'_x Data errors Systematic errors GeV 1.64 0.04711 0.03275 0.01627 1.72 -0.03878 0.01966 0.01589 1.8 -0.0509 0.01994 0.01802 1.88 -0.04192 0.02141 0.02401 1.96 -0.02858 0.02553 0.02955 2.04 0.00246 0.03388 0.03354 2.12 -0.05297 0.04253 0.03711 2.2 -0.0522 0.06147 0.04582 2.28 0.16335 0.0757 0.04679 2.36 0.04774 0.10733 0.05557