CLAS physics database search results Measurement E159M874 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.0401026 0.0115303 90 0.0334322 0.00865006 150 0.0508902 0.0132209 210 0.0663799 0.0150394 270 0.0375372 0.0102534 330 0.0427652 0.0112947