Differential Cross Sections

for unpolarized target and without recoil polarization 


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)
(click here for a larger image)

On this page only the individual 2-fold cross sections dsT, dsL, dsLT, dsTT and dsLT' will be calculated. For a calculation of the complete 5-fold differential cross section see our alternative page.
Note: The longitudinal cross sections (dsL, dsLT and dsLT') differ from those in Drechsel and Tiator, J. Phys. G18 (1992) 449. Here we do not use the longitudinal polarization epsilon_L!!


Channel:  K+ K0 K+S0 K0S+ K+S K0S0
Model input (on and off): Born K* (893)K1(1270)
Resonances in KL:S11(1650)P11(1710) P13(1720) D13(1900) (missing resonance)
Resonances in KS:S11(1650)P11(1710) P13(1720) S31(1900) P31(1910) 
Change values of Born couplings, relative to standard values: gKLN = -13.47, gKSN = 4.25 (no factors of 4p):
gKLN
gKSN

Change values of vector meson couplings GV,T =  ggKK* gV,TK*YN (relative to standard values):
K* (893)
K1(1270)
GV
GT
GV
GT


Change values of resonance couplings G1,2,3 =   g1,2,3gNN* gKYN (relative to standard values):
KL and KS
S11(1650)
P11(1710)
P13(1720)
G1
G3
G1
G3
 G1
G2
G3

 
KL only
KS only
D13(1900)
S31(1900)
 P31(1910)
G1
G2
G3
G1
G3
G1
G3


Choose kinematical variables

choose an independent (running) variable: Q² QK

choose values for Q², W, QK, step size and maximum value:
Q² (GeV/c)²
W (MeV)
QK (deg)
increment
upper value



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