ROOT suggestion

From: Nick van Eijndhoven (Nick@fys.ruu.nl)
Date: Thu Jan 15 1998 - 09:50:42 MET


Dear friends,
To my opinion it would be very convenient if the ROOT graphics editor
contained tools to draw Feynman diagrams.
A functionality which would fit my needs would be something like this :

1) Select the 'Editor' from the canvas menu

2) Click the (new) item 'Feynman' from the editor panel

3) A new panel pops up with items (i.e. pictures of line types) as :

   ------ (internal boson line)
   -->--- (external fermion line)
   --<--- (external anti-fermion line)

   and of course the wavy photon and gluon lines etc...

4) One could then activate a certain line type (by clicking)

5) Go with the pointer to the canvas and click a certain position

6) Keep left button down and drag to another position

7) Release button, and the selected line type between the 2 points is drawn

8) With the normal editor panel one can put text (incl. Greek chars etc..)
   into the picture.

As usual the picture can then be saved as a .ps .eps etc... file.

P.S. It would be convenient if the convention for text chars could follow
     the LaTeX one; everybody know this (by heart) and I think no one
     is used anymore to the old HBOOK/PAW convention.

Could this be implemented ? I think a lot more people would then start
using ROOT immediately (e.g. theoreticians would then also be interested).

                                                  Cheers,
                                                   Nick.

*----------------------------------------------------------------------*
 Dr. Nick van Eijndhoven                Department of Subatomic Physics
 email : nick@fys.ruu.nl                Utrecht University / NIKHEF
 tel. +31-30-2532331 (direct)           P.O. Box 80.000
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 fax. +31-30-2518689                    The Netherlands
 WWW : http://www.fys.ruu.nl/~nick      Office : Ornstein lab. 172
 ----------------------------------------------------------------------
 tel. +41-22-7679751 (direct)           CERN PPE Division / ALICE exp.
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 fax. +41-22-7679480                    Switzerland
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