CLAS physics database search results Measurement E159M66 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.26216 0.465461 27 2.38758 0.400925 45 2.72739 0.430499 63 2.35135 0.36971 81 1.93428 0.31811 99 1.77498 0.29155 117 1.63907 0.270943 135 1.63461 0.273417 153 1.39709 0.253179 171 0.973871 0.258502