Feynman diagram for gluon exchange, time up, gluon horizontal.


by Spinnor
Tags: diagram, exchange, feynman, gluon, horizontal, time
Spinnor
Spinnor is offline
#1
Dec21-13, 04:47 PM
P: 1,361
Consider the Feynman diagram below from,

http://hyperphysics.phy-astr.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!
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gluon.gif  
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mfb
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#2
Dec21-13, 05:24 PM
Mentor
P: 10,801
You could label it blue anti-green 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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