CLAS physics database search results Measurement E46M157 N/A 0 cos(theta_HS^pi+) dsigma/dcos(theta_HS^pi+) Data errors dimensionless mcb mcb -0.875 0.283637 0.071225 -0.625 0.218436 0.091725 -0.375 0.224692 0.108266 -0.125 0.121871 0.0475 0.125 0.1584 0.054176 0.375 0.149789 0.049894 0.625 0.237752 0.070704