CLAS physics database search results Measurement E159M318 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 3.43685 0.578853 27 3.91378 0.525978 45 3.18644 0.453742 63 2.74467 0.369743 81 2.35693 0.328545 99 1.91361 0.26559 117 1.82616 0.255862 135 1.82892 0.248575 153 2.21966 0.311648 171 2.20583 0.366899