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UV completion on the worldline.

Abel, Steven and Dondi, Nicola Andrea (2019) 'UV completion on the worldline.', Journal of high energy physics., 2019 (7). 090.


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".

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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.
Date accepted:04 July 2019
Date deposited:01 August 2019
Date of first online publication:17 July 2019
Date first made open access:No date available

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