Physics
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Tim

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21 Is there a mathematical reason for the Lagrangian to be Lorentz invariant? Dec 1 '14
18 Why is the “actual” gauge group of the standard model $SU(3) \times SU(2) \times U(1) /N$? Apr 16 '15
17 Vector spaces for the irreducible representations of the Lorentz Group Nov 29 '14
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? Apr 16 '15
15 Do electrons oscillate into muons just like electron-neutrinos into muon-neutrinos? Apr 15 '15
12 Why do we require quantum fields to vanish at infinity? Jan 23 '15
11 How can we measure chirality in experiments? Jan 24 '15
9 If $v_{a \dot{b}}$ transforms like a four-vector, what does $v_{a}^{\dot{b}}$ describe? Jan 18 '15
7 Why does the minus sign in the Minkowski metric mean that nothing can move backwards in time? Apr 3 '15
7 A No-Nonsense Introduction to Quantum Field Theory Jun 20 '15
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