CLAS physics database search results Measurement E159M237 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 0.947604 0.195423 27 0.893266 0.138512 45 0.792606 0.116152 63 0.79133 0.107741 81 0.691714 0.0996686 99 0.648792 0.0893863 117 0.721081 0.104258 135 0.715474 0.106154 153 0.773684 0.125302 171 0.546177 0.138819