Programs electron scattering, pion electroproduction and positron yield

The codes that will be used are:

$\star$ qfs (epc) - $e^-$ ($\pi^-$) cross section near resonance region[1]
$\star$ whitlow (wiser) - $e^-$ ($\pi^-$) cross section in deep inelastic region [2]([3])
$\star$ rosetail - $(e,e')$ elastic tail
$\star$ pos_epc, pos_wiser - $e^+$ cross section

For positron yield only one reaction channel has been included for calculating $e^+$ cross section: $\pi^0 \rightarrow e^+e^-$. The code pos_epc was first developed by J.P.Chen based on SLAC data and epc code for yield of $\pi^0$. Code pos_wiser was developed by using the same reaction channel, but using wiser's fit for yield of $\pi^0$.

[1] J. W. Lightbody, Jr., J. S. O'Connell, Computers in Physics, May/June (1988);
[2] L. W. Whitlow, SLAC-Report-357, (1990);
[3] D. E. Wiser, Ph.D. thesis, Univ. of Wisconsin, (1977);
[4] Mo and Tsai,Rev. Mod. Phys., 41, 205 (1969);
[5] Stein, et. al. Phys. Rev. D,12, 1884 (1975).