CLAS physics database search results Measurement E216M889 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 0.125632 0.0733232 0.03061727 27 0.105585 0.0342665 0.02221341 45 0.0761861 0.0248771 0.01149263 63 0.0447143 0.0127887 0.01023536 81 0.0388719 0.010795 0.00572479 99 0.0700595 0.0158975 0.01065396 117 0.0831168 0.0329672 0.01242608 135 0.0665151 0.0175874 0.01118366 153 0.0621946 0.0176101 0.0159358 171 0.0871543 0.0376028 0.03437526