CLAS physics database search results Measurement E46M138 N/A 0 cos(theta_HS^pi+) dsigma/dcos(theta_HS^pi+) Data errors dimensionless mcb mcb -0.875 0.71993 0.188252 -0.625 0.376754 0.121036 -0.375 0.221886 0.079253 -0.125 0.251172 0.079374 0.125 0.243644 0.070522 0.375 0.257141 0.071524 0.625 0.170477 0.052114 0.875 0.173662 0.057141