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UV completion on the worldline

Abel, Steven; Dondi, Nicola Andrea

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Nicola Andrea Dondi


A framework for UV completing particle theories is proposed, based on the worldline formalism, which is equivalent to weighting all sums over histories with a propertime dependent measure that has a smallest proper-time. We deduce a criterion to avoid ghosts, and nd that the ghost-free theories have the (string-theory inspired) innitederivative model of Siegel as a special case, but represent a signicant generalisation. Generically, the UV of such theories is dominated by a saddle-point in the proper-time, leading to simplication in the computation of amplitudes. We focus on a particularly attractive option which is to mimic the regulating properties of modular invariance with a worldline \inversion symmetry".


Abel, S., & Dondi, N. A. (2019). UV completion on the worldline. Journal of High Energy Physics, 2019(7), Article 90.

Journal Article Type Article
Acceptance Date Jul 4, 2019
Online Publication Date Jul 17, 2019
Publication Date Jul 17, 2019
Deposit Date Aug 1, 2019
Publicly Available Date Aug 1, 2019
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2019
Issue 7
Article Number 90


Published Journal Article (377 Kb)

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Copyright 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.

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