Large mass expansion versus small momentum expansion of Feynman diagrams

  title={Large mass expansion versus small momentum expansion of Feynman diagrams},
  author={J. Fleischer and Mikhail Yu. Kalmykov and Oleg L. Veretin},
  journal={Physics Letters B},
Abstract The method of the large mass expansion (LME) has the technical advantage that two-loop integrals occur only as bubbles with large masses. In many cases only one large mass occurs. In such cases these integrals are expressible in terms of Γ-functions, i.e. they can be handled completely analytically avoiding even recursions and therefore this approach may find a wide field of application. We consider it necessary to investigate the precision of this method and test it for several two… Expand
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