CLAS physics database search results Measurement E159M246 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 0.952621 0.191829 27 1.13238 0.170047 45 1.28896 0.178601 63 1.16886 0.162409 81 0.872125 0.12398 99 0.864901 0.11983 117 1.13947 0.157213 135 1.09979 0.167776 153 1.2235 0.188875 171 0.986544 0.217581