CLAS physics database search results Measurement E195M86 CLAS12 RG-K Daniel S. Carman 2022 W P'_x' Data errors Systematic errors GeV 1.64 -0.28801 0.06381 0.01776 1.72 -0.19646 0.03627 0.01475 1.8 -0.12767 0.03934 0.01621 1.88 -0.21817 0.04576 0.01914 1.96 -0.24888 0.06251 0.02498 2.04 -0.12859 0.08506 0.03088 2.12 0.20143 0.11436 0.03957 2.2 -0.13399 0.14173 0.03688 2.28 -0.19724 0.20311 0.04389 2.36 -0.3103 0.29993 0.04894