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Integrable Renormalization II: the general case

Kurusch Ebrahimi-Fard, Li Guo, Dirk Kreimer

hep-tharXiv:hep-th/0403118

Abstract

We extend the results we obtained in an earlier work. The cocommutative case of rooted ladder trees is generalized to a full Hopf algebra of (decorated) rooted trees. For Hopf algebra characters with target space of Rota-Baxter type, the Birkhoff decomposition of renormalization theory is derived by using the Rota-Baxter double construction, respectively Atkinson's theorem. We also outline the extension to the Hopf algebra of Feynman graphs via decorated rooted trees.

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