CLAS physics database search results Measurement E159M280 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.338258 0.0461493 90 0.497021 0.0713977 150 0.74149 0.0983947 210 0.710615 0.0965088 270 0.46791 0.0665304 330 0.346822 0.0480885