  Considering a realistic situation, where electron-neutral collisions persist
in plasma, analytical calculations are carried out for the THz radiation
generation by beating of two Skew Cosh-Gaussian (SG) lasers of parameters n &
s. The competency of these lasers over Gaussian lasers is discussed in detail
with respect to the effects of collision and beam width on the THz field
amplitude and efficiency of the mechanism. A critical transverse distance of
the peak of the THz field is defined that shows a dependence on the skewness
parameter of skew ChG lasers. Although electron-neutral collisions and larger
beam width lead to the drastic reduction in the THz field when the skew ChG
lasers are used in the plasma, the efficiency of the mechanism remains much
larger than the case of Gaussian lasers. Moreover, the skewChG lasers produce
stronger and multifocal THz radiation.
