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Tagged with goldstone-mode standard-model
5
questions
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Global symmetries QCD goldstone bosons
Beside the local $SU(3)$-Color-symmetrie The QCD Lagrangian also has global symmetries:
$$L_{QCD}=\sum_{f,c}\bar{q_{fc}}(i\gamma^\mu D_\mu - m ) q_{fc} - \frac{1}{4}F^a_{\mu \nu} F^{a \mu \nu} $$
$SU(...
- 63
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1
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How could negative $W$ "eat" the positive Goldstone bosons $\phi_1$ and $\phi_2$?
In the Standard Model, the Higgs field is
$\Phi=\left(\begin{array}{c}\phi^+\\\phi^0\\\end{array}\right)=\frac{1}{\sqrt{2}}\left(\begin{array}{c}\phi_1+i\phi_2\\\phi_3+i\phi_4\\\end{array}\right)$.
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Goldstone and longitudinal polarization equivalence between off-shell $W$s
If I understand correctly, the couplings of the longitudinal component of the $W$ and $Z$ bosons should be "equivalent" to the Goldstone bosons they ate after SSB.
In practice, this makes ...
- 41
4
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1
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Spontaneous symmetry breaking in the Standard Model. What is "broken"?
I know this question has been asked other times, but I am looking for a confirmation of the following.
When we say that the gauge group of the standard model is $G_{SM} = SU(3)_{c} \times SU(2)_{L} \...
- 858
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Does Goldstone-boson absorption by $W$ and $Z$ bosons mean that their masses are stochastic?
I have heard it explained that a complex doublet scalar field produces the Higgs boson, and also three Goldstone bosons which are absorbed by $W$ and $Z$ bosons, giving them mass.
Does this mean that ...
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