CLAS physics database search results Measurement E216M395 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 0.641976 0.0772636 0.06599526 27 0.710453 0.0508914 0.06665758 45 0.729174 0.0343366 0.06120214 63 0.611404 0.0243794 0.04782379 81 0.598601 0.0281608 0.04542273 99 0.53737 0.0315626 0.04574274 117 0.510105 0.0240644 0.09590342 135 0.459137 0.0257669 0.14733339 153 0.579445 0.00376921 0.32393148 171 0.837247 0.00102824 0.4621414