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ersbygre1
  • Member for 5 years, 11 months
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12 votes
1 answer
605 views

How do we know from representation theory that a massless spin-1 particle has only two polarizations?

11 votes
3 answers
666 views

Chirality of the Electromagnetic Field Tensor

9 votes
1 answer
1k views

What is dynamical symmetry breaking, exactly?

9 votes
1 answer
198 views

About Itzykson and Zuber's proof of Goldstone's theorem

8 votes
1 answer
377 views

Counting degrees of freedom in the Higgs mechanism for different gauges

7 votes
1 answer
1k views

How to calculate an axial anomaly in 1+1 dimensions?

6 votes
1 answer
358 views

How to deal with two-loop integrals in dimensional regularization?

5 votes
1 answer
839 views

Covariant Derivative in QCD: How does it act on gluons?

5 votes
1 answer
730 views

On-shell and off-shell transformations in Noether's theorem

4 votes
1 answer
199 views

What is pion condensation (or hadron condensation in general)?

3 votes
1 answer
117 views

Which quarks can form vacuum condensates?

3 votes
1 answer
156 views

Normalization of momentum eigenstates in QFT

3 votes
1 answer
726 views

What does the $R$ stand for in $R_\xi$ gauge?

3 votes
1 answer
195 views

Why do particle resonances lead to peaks in the cross section?

3 votes
2 answers
748 views

How are parity and charge conjugation eigenvalues related to angular momentum?

3 votes
1 answer
102 views

Are there finite-dimensional unitary irreducible representations in Euclidean space?

3 votes
1 answer
152 views

Using entanglement to transfer information faster than light

2 votes
0 answers
237 views

Calculating the pion decay constant in Chiral Perturbation Theory

2 votes
1 answer
375 views

Dirac sea interpretation VS the Feynman-Stueckelberg interpretation for antiparticles

2 votes
1 answer
106 views

Why do we need two gluons for the decay $ϕ \to 2K$?

2 votes
1 answer
499 views

How many counterterms does QED have?

2 votes
1 answer
177 views

Showing that the Wess-Zumino Lagrangian is invariant under a SUSY transformation

2 votes
1 answer
168 views

How to calculate a real (vector) superfield in Wess-Zumino gauge

2 votes
2 answers
282 views

How to interpret $\langle\pi|J|\pi\rangle$?

2 votes
2 answers
82 views

Fabri-Picasso theorem: Why can we assume that the charge commutes with momentum?

2 votes
1 answer
107 views

Why are Delta baryons called "Delta isobars"?

2 votes
2 answers
132 views

How does the propagation of a complex scalar field work?

2 votes
1 answer
124 views

Connection between quaternions and electromagnetism

2 votes
1 answer
46 views

Feasibility of the Aharonov-Bohm effect

1 vote
1 answer
86 views

Why does the Lorenz gauge $\partial_\mu A^\mu=0$ eliminate the spin-0 part of $A^\mu$?