Barvinsky A.O., Vilkovisky G.A. — Covariant perturbation theory (III). Spectral representations of the third-order form factors
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Название: Covariant perturbation theory (III). Spectral representations of the third-order form factors
Авторы: Barvinsky A.O., Vilkovisky G.A.
Аннотация:
Extension of covariant perturbation theory to third order in curvature requires the triple- spectral forms for one-loop vertex functions of massless fields to be established. For the simplest triangular graph with unit vertices the three spectral masses are known to form a triangle, and the spectral weight is 1/4πS where S is the area of this triangle. We generalize this result to an arbitrary derivative coupling.
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