New answers tagged regularization
The fine tuning you describe isn't present in the $\phi^4$ model. You need some some other heavy fields around to see it. For example, couple your $\phi$ to a heavy fermion of mass M, Then when you will have a shift in your mass $\delta m^2 \sim M^2 $. There will be other factors of $\pi$ and coupling constants and such, but the problem remains - for large M ...
for an analysis of anomalies via quantum impedances, see http://vixra.org/author/peter_cameron the paper on the pizero, eta, and etaprime branching ratios gives another perspective
Dimensional regularization (i.e., dim-reg) is a method to regulate divergent integrals. Instead of working in $4$ dimensions where loop integrals are divergent you can work in $4-\epsilon$ dimensions. This trick enables you to pick out the divergent part of the integral, as using a cutoff does. However, it treats all divergences equally so you can't ...
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