Multipoles
The multipoles can be given in 4 unique sets of isospin or charge channels  (click here for a larger image):

Further details can be found in D. Drechsel and L. Tiator, J. Phys. G 18 (1992) 449-497. (scanned version)


Type of the multipoles: (p(1/2), n(1/2), 3/2) (1/2, 0, 3/2) (0, +, - ) charge channels

Choose pion angular momentum l :  and multipoles: El+ El- Ml+ Ml- Ll+ Ll- Sl+ Sl-


Choose kinematical variables
choose an independent (running) variable: Q² W
choose values for Q², W, step size and maximum value:
Q² (GeV/c)²
W (MeV)
increment
upper value
click here

Change of model parameters:  ( suppress output )

Born Rho Omega 
P33(1232) P11(1440) D13(1520) S11(1535) S31(1620)
S11(1650) D15(1675)  F15(1680) D33(1700) P13(1720)
F35(1905) P31(1910) F37(1950) 

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 default values):
Isospin 3/2
P33(1232)
S31(1620)
D33(1700)
A3/2
A1/2
S1/2
A1/2
S1/2
A3/2
A1/2
S1/2
F35(1905)
P31(1910)
F37(1950)
A3/2
A1/2
S1/2
A1/2
S1/2
A3/2
A1/2
S1/2

Proton Isospin 1/2
P11(1440)
D13(1520)
S11(1535)
S11(1650)
A1/2
S1/2
A3/2
A1/2
S1/2
A1/2
S1/2
A1/2
S1/2
D15(1675)
F15(1680)
P13(1720)
A3/2
A1/2
S1/2
A3/2
A1/2
S1/2
A3/2
A1/2
S1/2

Neutron Isospin 1/2
P11(1440)
D13(1520)
S11(1535)
S11(1650)
A1/2
S1/2
A3/2
A1/2
S1/2
A1/2
S1/2
A1/2
S1/2
D15(1675)
F15(1680)
P13(1720)
A3/2
A1/2
S1/2
A3/2
A1/2
S1/2
A3/2
A1/2
S1/2
Back to Pion Electroproduction Main Page