Resurgence of the renormalization group equation (CROSBI ID 278288)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
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Bersini, Jahmall ; Maiezza, Alessio ; Vasquez, Juan Carlos
engleski
Resurgence of the renormalization group equation
We show how the renormalons emerge from the renormalization group equation with a priori no reference to any Feynman diagrams. The proof is rather given by recasting the renormalization group equation as a resurgent equation studied in the mathematical literature, which describes a function with an infinite number of singularities in the positive axis of the Borel plane. Consistency requires a one-to-one correspondence between the existence of such kind of equation and the actual (generalized) Borel resummation of the renormalons through a one-parameter transseries. Our finding suggests how non-perturbative contributions can affect the running couplings. We also discuss these concepts within the context of gauge theories, making use of the large number of flavor expansion.
Renormalization, Renormalon, Renormalization group equation, Resurgence, Analyzable function
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