CLAS physics database search results Measurement E46M87 N/A 0 Q^2 sigma_TT Data errors GeV2 mcb mcb 2.35 -0.236671 0.471034 2.65 -0.111924 0.366887 2.95 0.408056 0.288816 3.35 0.43922 0.298859 3.807 0.608577 0.469527