CLAS physics database search results Measurement E159M120 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 3.84223 0.732545 27 4.91445 0.787997 45 5.30322 0.797515 63 4.65633 0.699434 81 3.92843 0.585324 99 4.04204 0.619008 117 3.51724 0.536444 135 3.75859 0.579081 153 4.33366 0.66995 171 3.21564 0.580317