CLAS physics database search results Measurement E45M4 N/A 0 Q^2 sigma Data errors GeV2 mcb mcb 1.785 6.94324 0.974054 2.05 3.68319 0.516282 2.35 3.78175 0.530231 2.65 2.41115 0.338354 3.35 1.66143 0.233324 3.85 1.33349 0.187675 4.307 1.03791 0.146964