Physics
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OutrageousKangaroo
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16 Questions

Score Activity Newest Views
12 votes
0 answers
305 views

Deriving non-relativistic potentials from QFT

5 votes
0 answers
94 views

Is the photon propagator always coupled to a conserved current?

5 votes
0 answers
138 views

Analytic continuation of Feynman amplitudes seems ill-defined

3 votes
1 answer
84 views

Time dependency in the Hamiltonian in Schwartz's book on Quantum Field Theory

3 votes
0 answers
189 views

In and out states in QFT

3 votes
1 answer
209 views

How can Chiral symmetry protect the mass of a fermion if it's broken by quantization?

3 votes
1 answer
348 views

Is gauge invariance necessary to have Ward identity hold for off-shell amplitudes?

3 votes
1 answer
384 views

Is the 1PI self-energy of a massive photon transverse? EDIT: Upsetting consequences for the photon mass and renormalizability

3 votes
1 answer
145 views

Why can't spherical nuclei rotate?

2 votes
0 answers
105 views

Frame of reference of a freely falling observer in General Relativity

1 vote
0 answers
51 views

Evaluation of the OPE coefficients in Peskin&Schroeder's book

1 vote
1 answer
212 views

Why are the poles of the propagator the masses of bound states and not the masses of unbound states as well?

1 vote
1 answer
257 views

Factor of 1/2 in the cross section of Møller scattering

1 vote
1 answer
112 views

Why can't the vector potential be seen as the wave function of a photon?

1 vote
1 answer
164 views

Symmetry protects against symmetry-breaking counterterms in renormalization

0 votes
0 answers
29 views

Independent parameters of a conformally invariant object depending on four points

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