All Questions
Tagged with locality renormalization
6
questions
1
vote
1
answer
57
views
Definition of “quasi-locality” in Wilsonian RG scheme
I’m studying about the holographic RG with this paper.
In that paper they say Wilsonian action expects quasi locality, but I’m not sure what “quasi-locality" exactly means.
If quasi-locality ...
- 61
0
votes
1
answer
101
views
Understanding this abstract Lagrangian of effective field theory
I'm learning Wilson's approach to renormalization and the Effective Field Theory. Typically, the theory is defined by a Lagrangian valid up to some scale $Λ$. I saw these two definitions for 4-...
- 1,783
2
votes
2
answers
502
views
Locality of interactions and their high energy behavior
In a classic Georgi review of EFT, I have read the following quote
The result of eliminating heavy particles is inevitably a
nonrenormalizable theory, in which the nontrivial effects of the heavy
...
- 1,742
2
votes
1
answer
200
views
Why does the Lagrangian Density have to be a polynomial of the field?
In a lecture, a professor appeared to have said that the Lagrangian can only contain terms that have powers of $\phi$ and a term with $\partial_\mu \partial^\mu \phi$ . I imagine this would make any ...
- 305
10
votes
1
answer
316
views
Why don't we have logarithms or exponentials of the fields in the Lagrangians?
All the Lagrangian densities I have seen have always been polynomials of the fields. Is this a coincidence or is there a reason which forbids, say, Lagrangians with logarithms or exponentials of the ...
- 6,067
6
votes
1
answer
1k
views
$U(1)$ abelian/axial/chiral anomaly in 4D
I am reading $U(1)$ abelian/axial/chiral anomaly in 3+1 dimensions using the path integral method (Fujikawa). Am I wrong in assuming that the anomaly can be cancelled by introducing a counter term in ...
- 311