For some times I am having some problems with a few things in QFT. So please, i could use some clarification.(adsbygoogle = window.adsbygoogle || []).push({});

if we consider a quark-antiquark-pair in the QCD-vacuum (dual vacuum i mean, so no virtual quark antiquarks but magnetic monopoles bound in pairs like Cooperpairs) they are connected through a fluxtube.

Now when you consider moving quarks in such a vacuum it is stated that their mass depening on momentum (so this should be the kinetic part or the relativistic mass) is not zero but some positive integer which increases when the mass of the dual vacuum-particles increases.

This dynamical mass is also an effective mass , this means (i think) that the evolution of this mass is also (besides the momentum p) determened by the interactions of such quarks with the vacuum.

Is it ok to state that mass can be generated in such a way (i mean through these interactions) in QFT ???

Secondly, when we execute a Wick rotation in order to work with imaginary time right ??? But what is the big advatage of that ?? What are the fysical implications???

I hope someone can help me out here

marlon

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# This is for the QFT-specialists

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