CLAS physics database search results Measurement E216M1007 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 0.36673 0.0527953 0.03591392 27 0.403584 0.0329285 0.0497093 45 0.330371 0.0249039 0.04369468 63 0.306224 0.0261828 0.02870495 81 0.221625 0.0240479 0.02614221 99 0.253603 0.0294493 0.02901968 117 0.198914 0.0234195 0.05491494 135 0.140956 0.0212459 0.02226113 153 0.0757476 0.0213657 0.02755011 171 0.138697 0.00015056 0.07064258