CLAS physics database search results Measurement E159M345 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 3.01748 0.477521 27 3.91914 0.549368 45 3.28758 0.449918 63 3.79162 0.505143 81 3.66431 0.495055 99 3.21325 0.427488 117 2.87181 0.379775 135 3.15229 0.427349 153 3.41626 0.458843 171 3.1302 0.515866