CLAS physics database search results Measurement E159M444 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 0.383252 0.125967 27 0.484759 0.10724 45 0.359261 0.0652163 63 0.401257 0.0712667 81 0.276768 0.0480226 99 0.453476 0.085522 117 0.291821 0.0652429 135 0.30817 0.0616863 153 0.407467 0.0897406 171 0.329201 0.126658