Title of Paper:A new resummation scheme in scalar field theories

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Date of Publication:2013-04-26

Journal:Eur.Phys.J. C

Discipline:Natural Science

First-Level Discipline:Physics

Volume:73

Issue:4

Page Number:2411

Abstract:A new resummation scheme in scalar field theories is proposed by combining parquet resummation techniques and flow equations, which is characterized by a hierarchy structure of the Bethe–Salpeter (BS) equations. The new resummation scheme greatly improves on the approximations for the BS kernel. Resummation of the BS kernel in the t and u channels to infinite order is equivalent to truncate the effective action to infinite order. Our approximation approaches ensure that the theory can be renormalized, which is very important for numerical calculations. Two-point function can also be obtained

Note:arXiv:1211.1110 [hep-ph]