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IGY
  • Member for 3 years
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12 votes
1 answer
628 views

How does Algebraic QFT deal with renormalization?

8 votes
3 answers
2k views

How can I determine if an element undergoes electron or positron emission?

7 votes
2 answers
2k views

Is there a cutoff for Newtonian gravity?

6 votes
2 answers
632 views

Why there is a 3-point interaction in this theory?

5 votes
2 answers
488 views

How do I understand the Hodge $⋆$ operator in Yang-Mills Lagrangian?

5 votes
2 answers
452 views

Why is non-abelian gauge theory unique in 4 dimensional spacetime?

5 votes
2 answers
313 views

Grassmann numbers for fermions in QFT

5 votes
1 answer
393 views

Can I say two physical systems are isomorphic?

5 votes
1 answer
307 views

How can I determine which Feynman diagram picks up a minus sign?

4 votes
1 answer
115 views

$γγh$ interaction in the Standard Model

4 votes
1 answer
154 views

Understanding the symmetry factors in diagrammatic expansion

4 votes
1 answer
99 views

How are the gauge transformations of $\epsilon(\mu)$ and $A^\mu$ related?

3 votes
1 answer
76 views

How can I count diagrams (in this scalar QED example) at a particular order without drawing all the Feynman diagrams?

3 votes
2 answers
289 views

Schwinger–Dyson equation represented in a different form?

3 votes
1 answer
199 views

How can we determine which subgroup remains unbroken after spontaneous symmetry breaking for $SU(2)\times U(1)$ symmetry?

3 votes
1 answer
228 views

How to understand this field redefinition example from path integral formalism?

3 votes
2 answers
300 views

Auxiliary field in Quantum Field Theory

3 votes
0 answers
135 views

Why is there a phase difference between these Feynman diagrams?

3 votes
2 answers
281 views

Do commutation relations stay the same when we use different definitions to quantize a free scalar field?

3 votes
1 answer
104 views

Is there any relationship between cross-terms in QFT and double slit experiment?

3 votes
0 answers
116 views

How to find magnetic moment without using the trick?

3 votes
0 answers
578 views

What is a Taub–NUT space?

3 votes
1 answer
252 views

How does $[H,H] = 0$ imply $dH/dt = 0$?

2 votes
1 answer
581 views

Two questions about the Higgs decay mode graph

2 votes
1 answer
271 views

Why is $\beta^+$ decay possible for $\text{Cu}$-64?

2 votes
0 answers
95 views

Quantum computing and string theory: which path should I pursue first? [closed]

2 votes
1 answer
256 views

Does this quantum concentration work for both atoms and molecules?

2 votes
2 answers
341 views

Where is this counterterm coming from?

2 votes
1 answer
85 views

Locality and local gauge invariance

2 votes
2 answers
396 views

Why there is no $s$-channel for fermion-fermion scattering?