CLAS physics database search results Measurement E216M421 CLAS12 Run Group A Krishna Chandra 2018 theta(pi-) dsigma/d(−cos(theta_pim)) Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 9 1.25096 0.0809823 0.16004852 27 1.08715 0.0451551 0.12058894 45 1.10419 0.0698222 0.1026282 63 0.868866 0.0371253 0.07694021 81 0.683834 0.0317853 0.05803326 99 0.607861 0.0293317 0.05224156 117 0.551862 0.0216111 0.05546277 135 0.567549 0.0222052 0.05401606 153 0.723005 0.0587693 0.06895721 171 0.766408 0.0591632 0.0876421