Effective Spacetime by Karen Crowther

Author:Karen Crowther
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

7This description of renormalisation borrows from Lepage (1989), Delamotte (2004) and Zee (2010).

8The first dedicated book on the philosophy of QFT is Teller’s (1995) An Interpretive Introduction to Quantum Field Theory. See also the critical review by Huggett and Weingard (1996), and Teller’s (1998) reply.

9See, for example, Feynman (2006).

10Nowadays, thanks to the re-conceptualisation of QFTs as EFTs, we no longer distinguish between renormalisable and non-renormalisable theories; rather, the distinction is made in regards to the terms that appear in the theories. If a coupling constant has dimension , with , then the integral for a process of order N will behave at high-energy like where A depends on the details of the process, but not N. Hence, the (naively) non-renormalisable terms are those whose couplings have negative mass dimension, i.e. .

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