Charge in field theory
131965
Why can't a real scalar couple to the electromagnetic field?
141907
Haag's theorem and practical QFT computations
53287
Why is charge of the electron negative?
131016
Question about Klein-Gordon field Lagrangian
69389
Gauge fields and strings: Loop equations
102561
Electric flux due to external charge
87914
Contradictory result for scalar-field propagator from Feynman rules and LSZ formula
36539
Simple conceptual question conformal field theory
88116
Ampere's law and external currents
38103
A No-Nonsense Introduction to Quantum Field Theory
67641
Why should field operators satisfy the classical equations of motion?
35409
Massless charged particles
127274
Textbook on QFT in curved space-time via path integrals
128937
Lie theory and particle physics
17451
Expanding electromagnetic field Lagrangian in terms of gauge field
35650
Number theory in Physics
152177
Griffiths on Averaging and the Macroscopic Electric Field