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A novel approach to the computation of one-loop three- and four-point functions. III - The infrared divergent case | | J.Ph. Guillet
; E. Pilon
; Y. Shimizu
; M. S. Zidi
; | | Date: |
19 Nov 2018 | | Abstract: | This article is the third and last of a series presenting an alternative
method to compute the one-loop scalar integrals. It extends the results of
first two articles to the infrared divergent case. This novel method enjoys a
couple of interesting features as compared with the methods found in the
literature. It directly proceeds in terms of the quantities driving algebraic
reduction methods. It yields a simple decision tree based on the vanishing of
internal masses and one-pinched kinematic matrices which avoids a profusion of
cases. Lastly, it extends to kinematics more general than the one of physical
e.g. collider processes relevant at one loop. This last feature may be useful
when considering the application of this method beyond one loop using
generalised one-loop integrals as building blocks. | | Source: | arXiv, 1811.7760 | | Services: | Forum | Review | PDF | Favorites | |
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