Large Mass Expansion versus Small Momentum Expansion of Feynman Diagrams

Details Large Mass Expansion versus Small Momentum Expansion of Feynman Diagrams Large Mass Expansion versus Small Momentum Expansion of Feynman Diagrams

1998-02-06

arxiv.org/abs/hep-ph/9802262v1

Phys.Lett. B427 (1998) 141-146

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 8 pages including 5 eps figures, uses epsf.sty

Scientific paper

10.1016/S0370-2693(98)00312-8

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 $\Gamma$-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-loop vertex functions ocurring in the $Z \to b\bar{b}$ decay by comparing it with the small momentum expansion. It turns out that in general high order approximants have to be taken into account for a sufficient accuracy.

Affiliated with

Also associated with

No associations

Rating

Large Mass Expansion versus Small Momentum Expansion of Feynman Diagrams does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Large Mass Expansion versus Small Momentum Expansion of Feynman Diagrams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large Mass Expansion versus Small Momentum Expansion of Feynman Diagrams will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-423795