
#1
Aug1513, 09:08 PM

P: 2

Hi, I'm currently doing a course in particle physics at masters level and I have this problem:
I know that having an red:antired gluon isn't possible as this produces an nonzero trace for its representation, but if I have a red quark that emits a gluon and afterwards is still a red quark, what would be the possible gluon combinations/colors? is it just the two linear combinations: (R:aR  B:aB)/sqrt(2) and (R:aR + B:aB  2G:aG)/sqrt(6) ??? Thanks in advance 



#2
Aug1513, 11:12 PM

P: 2

never mind I found out




#3
Aug1613, 12:28 AM

Sci Advisor
P: 5,307





#4
Aug1613, 12:31 PM

P: 514

red quark going to a red quark via an gluon emission
In a common presentation of SU(3) operator matrices, two of them won't change color, but will give different phases to different colors.
A colorless operator would give the same phase to every color. 


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