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Feynman diagram for gluon exchange, time up, gluon horizontal. 
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#1
Dec2113, 04:47 PM

P: 1,375

Consider the Feynman diagram below from,
http://hyperphysics.phyastr.gsu.edu...les/expar.html where I assume time runs upwards and the gluon in the graphic runs horizontal and is labled as a green_antiblue gluon. If the gluon runs horizontal can one still label a gluon as being green_antiblue? Only if the gluon is not horizontal can we specifically label it? Hope my question is not too confusing. Thanks for any help! 


#2
Dec2113, 05:24 PM

Mentor
P: 12,074

You could label it blue antigreen as well, the "direction" of color flow can (and has to) be seen from the quarks if the diagram is drawn like this.



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