High-Energy Scatterings in Infinite-Derivative Field Theory and Ghost-Free Gravity

Spyridon Talaganis, Anupam Mazumdar

OnderzoeksoutputAcademicpeer review

37 Citaten (Scopus)

Samenvatting

In this paper, we will consider scattering diagrams in the context of infinite-derivative theories. First, we examine a finite-order, higher-derivative scalar field theory and find that we cannot eliminate the growth of scattering diagrams for large external momenta. Then, we employ an infinite-derivative scalar toy model and obtain that the external momentum dependence of scattering diagrams is convergent as the external momenta become very large. In order to eliminate the external momentum growth, one has to dress the bare vertices of the scattering diagrams by considering renormalised propagator and vertex loop corrections to the bare vertices. Finally, we investigate scattering diagrams in the context of a scalar toy model which is inspired by a ghost-free and singularity-free infinite-derivative theory of gravity, where we conclude that infinite derivatives can eliminate the external momentum growth of scattering diagrams and make the scattering diagrams convergent in the ultraviolet.
Originele taal-2English
Artikelnummer145005
Aantal pagina's1
TijdschriftClassical and Quantum Gravity
Volume33
Nummer van het tijdschrift14
DOI's
StatusPublished - 20-jun-2016
Extern gepubliceerdJa

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