CLAS physics database search results Measurement E216M701 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 0.519969 0.0437585 0.04816534 27 0.535064 0.0289076 0.0393405 45 0.484912 0.0222787 0.03874956 63 0.484488 0.0214402 0.03717677 81 0.539201 0.0236708 0.04218277 99 0.586634 0.0302806 0.04331727 117 0.519775 0.0350633 0.04278 135 0.354759 0.0211752 0.05208625 153 0.326602 0.0722018 0.11172596 171 0.340237 0.00042857 0.18517942