CLAS physics database search results Measurement E19M15 E89-004 R. A. Schumacher 2005 cos(theta) Cx Data errors dimensionless dimensionless dimensionless -0.7 0.782 0.529 -0.4 -1.255 0.403 -0.1 -0.458 0.264 0.2 -0.388 0.176 0.5 -0.601 0.166 0.8 -0.227 0.182