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| bio | website | |
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| location | ||
| age | ||
| visits | member for | 11 months |
| seen | May 6 at 22:21 | |
| stats | profile views | 32 |
Particle physics grad student.
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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? |
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Apr 11 |
awarded | Student |
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Apr 11 |
asked | Why is $R^2$ gravity not unitary? |
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Feb 19 |
revised |
Effective operator in four-fermion interaction Addedextra explanation |
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Feb 19 |
answered | Effective operator in four-fermion interaction |
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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! |
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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. |
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Jan 11 |
awarded | Organizer |
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Jan 11 |
revised |
“Hard wall”/ “soft wall” edited tags |
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Jan 11 |
answered | “Hard wall”/ “soft wall” |
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Jan 10 |
answered | Question on inflation |
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Jan 7 |
answered | Change of variables in path integrals |
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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. |
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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. |
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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. |
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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. |
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Dec 4 |
awarded | Caucus |
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Dec 4 |
awarded | Constituent |
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Dec 4 |
answered | Scalar Field Redefinition and Scattering Amplitude |
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Nov 21 |
answered | Quantum mechanics textbooks that use path integrals |
