CLAS physics database search results Measurement E216M998 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 0.322826 0.0430207 0.03180787 27 0.27442 0.0402982 0.02474998 45 0.290595 0.0192079 0.02430728 63 0.299316 0.0221552 0.02841105 81 0.275508 0.0203849 0.02311268 99 0.204679 0.0282279 0.01844404 117 0.199279 0.0346321 0.01954302 135 0.159847 0.0191745 0.02086375 153 0.105826 0.0147614 0.02484962 171 0.122775 0.00012946 0.06542285