CLAS physics database search results Measurement E216M152 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 1.37945 0.109555 0.20189958 27 1.5013 0.112913 0.16730711 45 1.3898 0.0434715 0.12478432 63 1.2482 0.0319666 0.11213209 81 1.2617 0.0289826 0.10279781 99 1.18617 0.0537663 0.11238892 117 1.20682 0.0237392 0.23765121 135 1.21128 0.0910678 0.31779772 153 1.12901 0.124902 0.52272536 171 1.60212 0.0120325 0.90019851