Register to reply 
What is colorsuppressed ?by Miralansa
Tags: colorsuppressed 
Share this thread: 
#1
Jun214, 10:50 AM

P: 6

Can someone explain to me what is a Feyman diagram colorsuppressed at the treelevel?
It's my first post, sorry if I'm too needy, I will try to improve. Thank you for the answers. 


#2
Jun214, 02:52 PM

Sci Advisor
Thanks
P: 4,160

Miralansa, Welcome to PF!
It always helps to start out by giving a reference. Where did you hear the term color suppression? Did they try to explain what it meant? Did they give an example? How about Googling "color suppressed" and looking up the first few hits. 


#3
Jun314, 06:02 AM

P: 6

This is a colorfavored Feynman diagram.
I think I need to do the Clebsch–Gordan of SU(3) for initial and final state to understand this, because they are in a given representation to be bound states. I'm not sure of this. Thank you for the reply. 


#4
Jun314, 07:10 AM

Sci Advisor
Thanks
P: 4,160

What is colorsuppressed ?
I still don't understand exactly what your question is, or how much you have already researched it.
Page 4 of this PDF gives a very simple explanation of what colorsuppressed means. The quick answer is that the suppression factor is 3^{2}, but this turns out to be pretty far off. The long answer is that the factor depends on a more detailed modeling of QCD interactions. 


#5
Jun314, 08:51 AM

P: 6

I have read these:
http://arxiv.org/abs/hepph/9504326 http://arxiv.org/abs/1104.4144 http://arxiv.org/abs/hepph/9404283v1 I'm searching to understand a more detailed modeling of QCD interactions. For example in exchange diagram, Rosner says that you have to consider 3 or more gluon for the singlet [itex]\phi[/itex], why? It's important because you have to consider all the diagrams in MonteCarlo. Maybe I'm doing the wrong questions, in the wrong place. Sorry. 


#6
Jun1114, 10:51 AM

P: 6

For posterities,
a good summary of B physics, that explains ideas, without a lot of calculations is this: http://arxiv.org/abs/hepph/0111177 With it you can check if you have understood, without reading 3 or 4 books. 


Register to reply 
Related Discussions  
Calculating Color temperature and Color Rendering Index..  General Physics  9  
Questions about the gluons, their color and anticolor charges and charge of quarks  High Energy, Nuclear, Particle Physics  15  
Superfluid suppressed while condensation enhanced  Atomic, Solid State, Comp. Physics  0  
Mathematica PlotStyle>{color,color,color} not working  Math & Science Software  3  
Planck's constant and suppressed vacuum fields  General Physics  0 