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- Title
New infra-red enhancements in 4-derivative gravity.
- Authors
Salvio, Alberto; Strumia, Alessandro; Veermäe, Hardi
- Abstract
4-Derivative gravity provides a renormalizable theory of quantum gravity at the price of introducing a physical ghost, which could admit a sensible positive-energy quantization. To understand its physics, we compute ghost-mediated scatterings among matter particles at tree-level, finding a new power-like infra-red enhancement typical of 4-derivative theories, that we dub ‘ghostrahlung’. Super-Planckian scatterings get downgraded to Planckian by radiating hard gravitons and ghosts, which are weakly coupled and carry away the energy.
- Subjects
INFRARED spectroscopy; QUANTUM gravity; QUANTIZATION (Physics); SCATTERING (Physics); GRAVITONS
- Publication
European Physical Journal C -- Particles & Fields, 2018, Vol 78, Issue 10, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-018-6311-1