CLAS physics database search results Measurement E46M13 N/A 0 Q^2 sigma Data errors GeV2 mcb mcb 2.05 1.44047 0.471043 2.65 0.85603 0.257481 2.95 0.599674 0.17724 3.35 0.517777 0.152199 3.85 0.661626 0.196315 4.35 0.387931 0.113735