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seen May 13 at 22:40

Particle physics grad student.


Jun
22
awarded  Yearling
Jun
22
awarded  Yearling
Apr
11
comment Why is $R^2$ gravity not unitary?
Thanks for your reply. But I don't see that a simple fourth-order Hamiltonian for a real scalar field (for example) is not Hermitian. If it is Hermitian how can the $S$-matrix not be unitary?
Apr
11
awarded  Student
Apr
11
asked Why is $R^2$ gravity not unitary?
Feb
19
revised Effective operator in four-fermion interaction
Addedextra explanation
Feb
19
answered Effective operator in four-fermion interaction
Feb
19
comment Effective operator in four-fermion interaction
The operator in question doesn't come from BSM physics. It comes from integrating out the W boson which is part of the SM!
Jan
25
comment Nonpertubative renormalization in quantum field theory versus statistical physics
Not sure if this is the sort of thing you are looking for but you might find this review. It uses the concept of the ERGE and starts of with familiar ideas of blocks of spins on a lattice from statistical physics.
Jan
11
awarded  Organizer
Jan
11
revised “Hard wall”/ “soft wall”
edited tags
Jan
11
answered “Hard wall”/ “soft wall”
Jan
10
answered Question on inflation
Jan
7
answered Change of variables in path integrals
Dec
13
comment Was the Higgs mass correctly predicted by asymptotic safety of gravity?
Not sure if this exactly responds to your point but this recent paper shows that with a specific identification of the RG scale, conformal scaling is encoded in the equation of state in the limit of vanishing horizon area.
Dec
4
comment Scalar Field Redefinition and Scattering Amplitude
Ok, so I cancelled my down vote after your edit. I still think you should elaborate much more on your 'just because of LSZ' comment, please explain the details.
Dec
4
comment Scalar Field Redefinition and Scattering Amplitude
Good point, I agree with you and should have written a comment first as you say. Sorry for not doing so.
Dec
4
comment Scalar Field Redefinition and Scattering Amplitude
The answer is unclear, 'just because the LSZ reduction' does not give much insight at all, how does that help the questioner? That is NOT the only term at first order in $\lambda$, what about the derivative term? Your statement that there is no tree level amplitude for $2 \to 2$ scattering from a $\phi^3$ theory is just wrong, you have $s$, $t$ and $u$ channel diagrams! Lots of erroneous and unclear information hence the down vote.
Dec
4
awarded  Caucus
Dec
4
awarded  Constituent