Skip to main content
OutrageousKangaroo's user avatar
OutrageousKangaroo's user avatar
OutrageousKangaroo's user avatar
OutrageousKangaroo
  • Member for 3 years, 1 month
  • Last seen this week
12 votes
0 answers
383 views

Deriving non-relativistic potentials from QFT

5 votes
0 answers
99 views

Is the photon propagator always coupled to a conserved current?

5 votes
0 answers
159 views

Analytic continuation of Feynman amplitudes seems ill-defined

3 votes
1 answer
91 views

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

3 votes
0 answers
230 views

In and out states in QFT

3 votes
1 answer
325 views

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

3 votes
1 answer
473 views

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

3 votes
1 answer
482 views

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

3 votes
1 answer
181 views

Why can't spherical nuclei rotate?

2 votes
0 answers
107 views

Frame of reference of a freely falling observer in General Relativity

1 vote
0 answers
19 views

Long and short range correlations in nuclear physics

1 vote
0 answers
57 views

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

1 vote
1 answer
288 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
343 views

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

1 vote
1 answer
141 views

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

1 vote
1 answer
221 views

Symmetry protects against symmetry-breaking counterterms in renormalization

0 votes
0 answers
47 views

Connection between superconductivity and breaking of $U(1)$ symmetry in superconductors

0 votes
0 answers
31 views

Independent parameters of a conformally invariant object depending on four points