CLAS physics database search results Measurement E46M134 N/A 0 cos(theta_HS^pi+) dsigma/dcos(theta_HS^pi+) Data errors dimensionless mcb mcb -0.875 0.847809 0.227066 -0.625 0.341596 0.105508 -0.375 0.294191 0.082742 -0.125 0.282342 0.087107 0.125 0.242335 0.073325 0.375 0.240615 0.066282 0.625 0.177734 0.053636