Publication details for Professor Steven AbelAbel, Steven & Dondi, Nicola Andrea (2019). UV completion on the worldline. Journal of High Energy Physics 2019(7): 90.
- Publication type: Journal Article
- ISSN/ISBN: 1029-8479 (electronic)
- DOI: 10.1007/JHEP07(2019)090
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
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".