CLAS physics database search results Measurement E159M741 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.03186 0.217577 27 1.07334 0.184314 45 0.988351 0.150735 63 0.756256 0.116939 81 0.684567 0.125245 99 0.644414 0.107584 117 0.637597 0.109705 135 0.71771 0.11956 153 0.587671 0.123866 171 0.505615 0.13076