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论文类型：期刊论文

发表时间：2013-04-26

发表刊物：Eur.Phys.J. C

学科门类：理学

一级学科：物理学

卷号：73

期号：4

页面范围：2411

摘要：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

备注：arXiv:1211.1110 [hep-ph]