On Wilsonian flows in gauge theories
Apr, 20016 pages
Part of Renormalization group. Proceedings, 5th International Conference, RG 2002, Tatranska Strba, Slovakia, March 10-16, 2002, The exact renormalization group. Proceedings, 2nd Conference, Rome, Italy, September 18-22, 2000
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- Int.J.Mod.Phys.A 16 (2001) 2105-2110
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Abstract: (WSP)
An Exact Renormalisation Group (ERG) approach to non-Abelian gauge theories is discussed. We focus on the derivation of universal beta-functions and the choice of the initial effective action, the latter being a key input in the approach. To that end we establish the map between Gell-Mann–Low scaling of the full theory and the scaling in an ERG approach. Then this map is used to derive the 2-loop β-function within a simple straightforward calculation. The implications for the choice of the initial effective action are discussed.- gauge field theory: nonabelian
- renormalization group: beta function
- effective action
- scaling
- background field
- renormalization
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