Unitarity of Minkowski nonlocal theories made explicit
| Autor: | Alexey S. Koshelev, Anna Tokareva |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
High Energy Physics - Theory Unitarity 010308 nuclear & particles physics Analytic continuation FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences General Relativity and Quantum Cosmology Scattering amplitude Amplitude High Energy Physics - Theory (hep-th) 0103 physical sciences Euclidean geometry Minkowski space 010306 general physics Signature (topology) Scalar field Mathematical physics |
| Zdroj: | Physical Review |
| Popis: | In this work we explicitly show that the perturbative unitarity of analytic infinite derivative (AID) 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 non-local $\phi^4$ model for various infinite derivative operators. General UV properties of amplitudes in non-local theories are discussed. Comment: 16 pages, 7 figures; revision matching the published version |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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