How I Learned to Stop Worrying and Love QFT

Abstract

Lecture notes of a block course explaining why quantum field theory might be in a better mathematical state than one gets the impression from the typical introduction to the topic. It is explained how to make sense of a perturbative expansion that fails to converge and how to express Feynman loop integrals and their renormalization using the language of distribtions rather than divergent, ill-defined integrals.

Lecture notes of a block course by RCH, notes taken by MF and CS, 23 pages, V2: Typos fixed

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