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New infra-red enhancements in 4-derivative gravity
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...
| Autores principales: | , , |
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| Lenguaje: | eng |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1140/epjc/s10052-018-6311-1 http://cds.cern.ch/record/2636311 |
| _version_ | 1780959867835514880 |
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| author | Salvio, Alberto Strumia, Alessandro Veermäe, Hardi |
| author_facet | Salvio, Alberto Strumia, Alessandro Veermäe, Hardi |
| author_sort | Salvio, Alberto |
| collection | CERN |
| description | 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. |
| id | cern-2636311 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2018 |
| record_format | invenio |
| spelling | cern-26363112021-11-12T20:30:52Zdoi:10.1140/epjc/s10052-018-6311-1http://cds.cern.ch/record/2636311engSalvio, AlbertoStrumia, AlessandroVeermäe, HardiNew infra-red enhancements in 4-derivative gravityhep-phParticle Physics - Phenomenologygr-qcGeneral Relativity and Cosmologyhep-thParticle Physics - Theory4-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.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.arXiv:1808.07883CERN-TH-2018-195oai:cds.cern.ch:26363112018-08-23 |
| spellingShingle | hep-ph Particle Physics - Phenomenology gr-qc General Relativity and Cosmology hep-th Particle Physics - Theory Salvio, Alberto Strumia, Alessandro Veermäe, Hardi New infra-red enhancements in 4-derivative gravity |
| title | New infra-red enhancements in 4-derivative gravity |
| title_full | New infra-red enhancements in 4-derivative gravity |
| title_fullStr | New infra-red enhancements in 4-derivative gravity |
| title_full_unstemmed | New infra-red enhancements in 4-derivative gravity |
| title_short | New infra-red enhancements in 4-derivative gravity |
| title_sort | new infra-red enhancements in 4-derivative gravity |
| topic | hep-ph Particle Physics - Phenomenology gr-qc General Relativity and Cosmology hep-th Particle Physics - Theory |
| url | https://dx.doi.org/10.1140/epjc/s10052-018-6311-1 http://cds.cern.ch/record/2636311 |
| work_keys_str_mv | AT salvioalberto newinfraredenhancementsin4derivativegravity AT strumiaalessandro newinfraredenhancementsin4derivativegravity AT veermaehardi newinfraredenhancementsin4derivativegravity |