New infra-red enhancements in 4-derivative gravity

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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...

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Detalles Bibliográficos
Autores principales: Salvio, Alberto, Strumia, Alessandro, Veermäe, Hardi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2018
Materias:
Regular Article - Theoretical Physics
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6405058/
https://www.ncbi.nlm.nih.gov/pubmed/30930684
http://dx.doi.org/10.1140/epjc/s10052-018-6311-1
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author Salvio, Alberto
Strumia, Alessandro
Veermäe, Hardi
author_facet Salvio, Alberto
Strumia, Alessandro
Veermäe, Hardi
author_sort Salvio, Alberto
collection PubMed
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.
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spelling pubmed-64050582019-03-27 New infra-red enhancements in 4-derivative gravity Salvio, Alberto Strumia, Alessandro Veermäe, Hardi Eur Phys J C Part Fields Regular Article - Theoretical Physics 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. Springer Berlin Heidelberg 2018-10-20 2018 /pmc/articles/PMC6405058/ /pubmed/30930684 http://dx.doi.org/10.1140/epjc/s10052-018-6311-1 Text en © The Author(s) 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3
spellingShingle Regular Article - Theoretical Physics
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 Regular Article - Theoretical Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6405058/
https://www.ncbi.nlm.nih.gov/pubmed/30930684
http://dx.doi.org/10.1140/epjc/s10052-018-6311-1
work_keys_str_mv AT salvioalberto newinfraredenhancementsin4derivativegravity
AT strumiaalessandro newinfraredenhancementsin4derivativegravity
AT veermaehardi newinfraredenhancementsin4derivativegravity

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