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Дата изменения: Tue Aug 15 14:29:16 2000
Дата индексирования: Mon Oct 1 22:37:54 2012
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L^ATEX  output

CompHEP  uses the Axodraw package by J.A.M. Vermaseren [Vermaseren-1994] to write diagrams and plots in L^ATEX  format. To use this package the Axodraw style should be included in the documentstyle statement. An example would be

$\backslash$documentstyle[axodraw]{article}

Under kind permission of the author we put a copy of axodraw.sty file in the $COMPHEP/ directory. One bug in the axis drawing routine has been corrected.

The Axodraw syntax is very easy and you can alter the CompHEP  output to get some local correction in picture if any. The user can also change line width, scale of picture, and size of characters. The corresponding L^ATEX  and Axodraw instructions are presented in the beginning of the output. For example,

{  \small              % letter  size control
   \SetWidth{0.7}      % line  width control
   \SetScale{1.0}      % line scale control
   \unitlength=1.0 pt  % text position control
   ............
}

Note that the $\backslash$SetScale instruction influences on positions of lines, whereas the $\backslash$unitlength variable is responsible for position if texts. Consequently, if the user would like to change the scale of picture, he must improve these instructions in the same manner. For instance, to increase the picture by two times use

   \SetScale{2.0}      % picture size control
   \unitlength=2.0 pt  % picture size control

In the case of Feynman diagram output CompHEP  substitutes L^ATEX  names of particles as they are defined in the Particle table (see Section ).