Tagged Questions
3
votes
0answers
48 views
Does the number of left handed chiral quark superfields always equal half the number of quark flavours?
In Weinberg's "The Quantum Theory of Fields Vol III" page 267 we're told that $n_f = 2N_f$. Where $n_f$ are the number of flavours and $N_f$ is the number of left chiral quark superfields (or the ...
6
votes
0answers
94 views
Beta function of pure $SU(N_\text{c})$ Yang-Mills theory
What is the dependence of the beta function of pure $SU(N_\text{c})$ Yang-Mills theory on the number of colors? I guess
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2
votes
0answers
60 views
CP-violation in weak and strong sectors
There is a possible CP-violating term in the strong sector of the standard model proportional to $\theta_\text{QCD}$. In the absence of this term, the strong interactions are CP-invariant. In the ...
8
votes
1answer
118 views
What is the Principle of Maximum Conformality?
I'm trying to understand this article about an advance in the theoretical understanding of QCD which centers on the Principal of Maximum Conformality. What is this Principle? In other words, what is ...
1
vote
2answers
258 views
Is QCD free from all divergences?
On page 8 in http://arxiv.org/pdf/hep-th/9704139v1.pdf David Gross makes the following comment:
"This theory [QCD] has no ultraviolet divergences at all. The local (bare) coupling vanishes, and the ...
