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Homework Help: Particle Physics: Gluon Lines

  1. Dec 20, 2013 #1
    I draw Feynman diagrams in JaxoDraw. But If I draw gluon line up to down or down to up, I get different results for gluon lines. I share a picture to explain my problem. Are these two diagrams the same?
    http://img809.imageshack.us/img809/3184/rq9z.jpg [Broken]
    Last edited by a moderator: May 6, 2017
  2. jcsd
  3. Dec 20, 2013 #2
    You mean just that the lines appear to be spiraling clockwise vs. counter-clockwise? That makes no difference, it's just stylistic. I see no difference between these two diagrams.

    I would draw the dd quarks off to the side to avoid having the lines overlapping like this, just better stylistically. But totally equivalent from a physics standpoint.

    As for Jaxodraw, I'm not familiar with the software, I normally use FeynMP in Latex. But I don't think either is widely used, I wonder what the most common Feynman-diagram drawing tool is?
  4. Dec 20, 2013 #3
    Thank you very much for your reply. Maybe this link is useful for you.
    http://www.insectnation.org/howto/academic-software [Broken]
    Last edited by a moderator: May 6, 2017
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