Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

A unitarity compatible approach to one-loop amplitudes with massive fermions.

Badger, Simon and Brønnum-Hansen, Christian and Buciuni, Francesco and O’Connell, Donal (2017) 'A unitarity compatible approach to one-loop amplitudes with massive fermions.', Journal of high energy physics., 2017 (6). p. 141.

Abstract

We explain how one-loop amplitudes with massive fermions can be computed using only on-shell information. We first use the spinor-helicity formalism in six dimensions to perform generalised unitarity cuts in d dimensions. We then show that divergent wave-function cuts can be avoided, and the remaining ambiguities in the renormalised amplitudes can be fixed, by matching to universal infrared poles in 4 − 2ϵ dimensions and ultraviolet poles in 6 − 2ϵ dimensions. In the latter case we construct an effective Lagrangian in six dimensions and reduce the additional constraint to an on-shell tree-level computation.

Item Type:Article
Full text:(VoR) Version of Record
First Live Deposit - 25 July 2017
Available under License - Creative Commons Attribution.
Download PDF
(897Kb)
Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1007/JHEP06(2017)141
Publisher statement:This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Record Created:25 Jul 2017 12:13
Last Modified:25 Jul 2017 14:37

Social bookmarking: del.icio.usConnoteaBibSonomyCiteULikeFacebookTwitterExport: EndNote, Zotero | BibTex
Look up in GoogleScholar | Find in a UK Library