6533b851fe1ef96bd12a8eac
RESEARCH PRODUCT
Finite Quantum Gravity Amplitudes: No Strings Attached
Tom DraperBenjamin KnorrFrank SaueressigChris Ripkensubject
PhysicsHigh Energy Physics - TheoryUnitarityScatteringScalar (physics)General Physics and AstronomyFOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)String theory01 natural sciencesGeneral Relativity and Quantum CosmologyScattering amplitudeGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theory (hep-th)Quantum mechanics0103 physical sciencesQuantum gravityHigh Energy Physics010306 general physicsQuantumEffective actiondescription
We study the gravity-mediated scattering of scalar fields based on a parameterisation of the Lorentzian quantum effective action. We demonstrate that the interplay of infinite towers of spin zero and spin two poles at imaginary squared momentum leads to scattering amplitudes that are compatible with unitarity bounds, causal, and scale-free at trans-Planckian energy. Our construction avoids introducing non-localities or the massive higher-spin particles that are characteristic in string theory.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-10-27 | Physical Review Letters |