A1 Journal article (refereed)
Unitarity of Minkowski nonlocal theories made explicit (2021)
Koshelev, A. S., & Tokareva, A. (2021). Unitarity of Minkowski nonlocal theories made explicit. Physical Review D, 104(2), Article 025016. https://doi.org/10.1103/physrevd.104.025016
JYU authors or editors
Publication details
All authors or editors: Koshelev, Alexey S.; Tokareva, Anna
Journal or series: Physical Review D
ISSN: 2470-0010
eISSN: 2470-0029
Publication year: 2021
Publication date: 23/07/2021
Volume: 104
Issue number: 2
Article number: 025016
Publisher: American Physical Society (APS)
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1103/physrevd.104.025016
Publication open access: Openly available
Publication channel open access: Partially open access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/77204
Web address of parallel published publication (pre-print): https://arxiv.org/abs/2103.01945
Abstract
In this work we explicitly show that the perturbative unitarity of analytic infinite derivative scalar field theories can be achieved using a modified prescription for computing scattering amplitudes. The crux of the new prescription is the analytic continuation of a result obtained in the Euclidean signature to the Minkowski external momenta. We intensively elaborate an example of a nonlocal ϕ4 model for various infinite derivative operators. General UV properties of amplitudes in nonlocal theories are discussed.
Contributing organizations
Related projects
- Dark Universe
- Kainulainen, Kimmo
- Research Council of Finland
Ministry reporting: Yes
Reporting Year: 2021
JUFO rating: 2