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Two-loop scalar functions with $I$ internal lines, $I le 5$ | | J. Ph. Guillet
; E. Pilon
; Y. Shimizu
; M. S. Zidi
; | | Date: |
1 Mar 2021 | | Abstract: | This article displays a proof of concept of the mixed analytical/numerical
method, presented in previous publications, to compute two-loop functions with
up to five massive propagators in a scalar theory having three- and four-leg
vertices as the Higgs sector of the Standard Model. Several amplitudes are
considered with two, three and four external legs. Some of them diverge in the
UV region and we demonstrate that the method works in that case. It is shown
that all these classes of amplitudes can be generated by four master
topologies. Results of a numerical evaluation for some kinematics are
presented, they are compared to a public code and agree well within the error
bars quoted by the different programs. | | Source: | arXiv, 2103.01177 | | Services: | Forum | Review | PDF | Favorites | |
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