Top network posts

• 20 Is there a mathematical reason for the Lagrangian to be Lorentz invariant?
• 17 Vector spaces for the irreducible representations of the Lorentz Group
• 17 Why is the "actual" gauge group of the standard model $SU(3) \times SU(2) \times U(1) /N$?
• 15 Why is the strong CP term $ \theta \frac{g^2}{32 \pi^2} G_{\mu \nu}^a \tilde{G}^{a, \mu \nu}$ never considered for $SU(2)$ or $U(1)$ interactions?
• 14 Do electrons oscillate into muons just like electron-neutrinos into muon-neutrinos?
• 11 How can we measure chirality in experiments?
• 9 Why do we require quantum fields to vanish at infinity?
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