CLAS physics database search results Measurement E46M163 N/A 0 Q^2 R_rho Data errors GeV2 dimensionless dimensionless 2.05 1.912809 0.692324 2.35 1.248272 0.499125 2.65 0.960156 0.459415 2.95 0.776547 0.411979 3.295 3.152275 2.345962