CLAS physics database search results Measurement E159M549 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 0.779877 0.119215 90 0.739262 0.098409 150 0.849284 0.121542 210 0.801088 0.109711 270 0.788935 0.118513 330 0.667061 0.0974793