The following notation of the coincidence cross section
will be used in our calculations. Further details can be found in D. Drechsel
and L. Tiator, J. Phys. G 18 (1992) 449-497. (scanned
version)Channel: (pi0,p) (pi0,n) (pi+,n) (pi-,p)
Model parameters: Born Rho Omega P33(1232) P11(1440)
D13(1520) S11(1535) S31(1620) S11(1650) F15(1680) D33(1700)
Change of S-wave low-energy
corrections and type of pi-N coupling (click
here for details)
E0+
S0+
PS-PV mixing range parameter Lambda
Change
values of resonance couplings (relative to standard values):
P33(1232)
S31(1620)
D33(1700)
M1+
E1+
S1+
E0+
S0+
M2-
E2-
S2-
P11(1440)
D13(1520)
S11(1535)
S11(1650)
F15(1680)
M1-
S1-
M2-
E2-
S2-
E0+
S0+
E0+
S0+
M3-
E3-
S3-
Choose kinematical variables
choose an independent (running)
variable: Q² W
choose values for Q², W, step
size and maximum value: