CLAS physics database search results Measurement E216M224 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 2.90546 0.0919933 0.28804655 27 2.55549 0.0538555 0.24341742 45 2.24554 0.0372306 0.201175 63 2.18467 0.0459983 0.18087444 81 2.31026 0.0555437 0.17457506 99 2.42828 0.036651 0.17925596 117 2.24704 0.0378752 0.1891313 135 2.01874 0.0472428 0.19573619 153 1.88601 0.0872385 0.31402099 171 1.44363 0.0127475 0.8588833