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Results tagged with quantum-field-theory
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user 325017
Quantum Field Theory (QFT) is the theoretical framework describing the quantisation of classical fields which allows a Lorentz-invariant formulation of quantum mechanics. QFT is used both in high energy physics as well as condensed matter physics and closely related to statistical field theory. Use this tag for many-body quantum-mechanical problems and the theory of particle physics. Don’t combine with the [quantum-mechanics] tag.
3
votes
1
answer
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How to use Passarino-Veltman reduction for integral containing two tensors?
I am trying to use Passarino-Veltman reduction to solve the following integral:
$$ \int \frac{d^{D}k}{(2\pi)^{D}} \frac{k^{\mu}k^{\nu}}{k^{2}(k-q)^{2}} $$
However every ansatz I try, the integral goes …
- 115
5
votes
4
answers
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Vacuum polarisation in QED - why is it significant to renormalisation?
I have followed along for the derivation of the amplitude of the 2-photon vacuum polarisation and the book says the result is important for the renormalisation of QED, why is this?
- 115