CLAS physics database search results Measurement E216M584 CLAS12 Run Group A Krishna Chandra 2018 theta(pi+) dsigma/d(−cos(theta_pip)) Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 9 0.803179 0.0481119 0.06633733 27 0.792094 0.032611 0.06804103 45 0.775938 0.0230616 0.05978991 63 0.822272 0.0231966 0.06356724 81 0.869054 0.0289815 0.06670481 99 0.889277 0.0389537 0.06572033 117 0.758472 0.0324754 0.06432716 135 0.635762 0.027013 0.08047487 153 0.497981 0.0301718 0.13814376 171 0.575432 0.00143987 0.29974117