CLAS physics database search results Measurement E159M714 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 0.645057 0.165415 27 0.993519 0.163122 45 0.923203 0.149245 63 0.755923 0.119829 81 0.672018 0.109834 99 0.610204 0.105142 117 0.465896 0.0822896 135 0.75652 0.154668 153 0.62912 0.130282 171 0.448308 0.114877