Agravity up to infinite energy
Abstract The self-interactions of the conformal mode of the graviton are controlled, in dimensionless gravity theories (agravity), by a coupling $$f_0$$ f0 that is not asymptotically free. We show that, nevertheless, agravity can be a complete theory valid up to infinite energy. When $$f_0$$ f0 grow...
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doaj-3b08ccbe33c14abfa7f6a225e678b3652020-11-24T21:21:42ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522018-02-0178211510.1140/epjc/s10052-018-5588-4Agravity up to infinite energyAlberto Salvio0Alessandro Strumia1Theoretical Physics Department, CERNDipartimento di Fisica dell’Universitá di Pisa and INFNAbstract The self-interactions of the conformal mode of the graviton are controlled, in dimensionless gravity theories (agravity), by a coupling $$f_0$$ f0 that is not asymptotically free. We show that, nevertheless, agravity can be a complete theory valid up to infinite energy. When $$f_0$$ f0 grows to large values, the conformal mode of the graviton decouples from the rest of the theory and does not hit any Landau pole provided that scalars are asymptotically conformally coupled and all other couplings approach fixed points. Then agravity can flow to conformal gravity at infinite energy. We identify scenarios where the Higgs mass does not receive unnaturally large physical corrections. We also show a useful equivalence between agravity and conformal gravity plus two extra conformally coupled scalars, and we give a simpler form for the renormalization group equations of dimensionless couplings as well as of massive parameters in the presence of the most general matter sector.http://link.springer.com/article/10.1140/epjc/s10052-018-5588-4 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Alberto Salvio Alessandro Strumia |
spellingShingle |
Alberto Salvio Alessandro Strumia Agravity up to infinite energy European Physical Journal C: Particles and Fields |
author_facet |
Alberto Salvio Alessandro Strumia |
author_sort |
Alberto Salvio |
title |
Agravity up to infinite energy |
title_short |
Agravity up to infinite energy |
title_full |
Agravity up to infinite energy |
title_fullStr |
Agravity up to infinite energy |
title_full_unstemmed |
Agravity up to infinite energy |
title_sort |
agravity up to infinite energy |
publisher |
SpringerOpen |
series |
European Physical Journal C: Particles and Fields |
issn |
1434-6044 1434-6052 |
publishDate |
2018-02-01 |
description |
Abstract The self-interactions of the conformal mode of the graviton are controlled, in dimensionless gravity theories (agravity), by a coupling $$f_0$$ f0 that is not asymptotically free. We show that, nevertheless, agravity can be a complete theory valid up to infinite energy. When $$f_0$$ f0 grows to large values, the conformal mode of the graviton decouples from the rest of the theory and does not hit any Landau pole provided that scalars are asymptotically conformally coupled and all other couplings approach fixed points. Then agravity can flow to conformal gravity at infinite energy. We identify scenarios where the Higgs mass does not receive unnaturally large physical corrections. We also show a useful equivalence between agravity and conformal gravity plus two extra conformally coupled scalars, and we give a simpler form for the renormalization group equations of dimensionless couplings as well as of massive parameters in the presence of the most general matter sector. |
url |
http://link.springer.com/article/10.1140/epjc/s10052-018-5588-4 |
work_keys_str_mv |
AT albertosalvio agravityuptoinfiniteenergy AT alessandrostrumia agravityuptoinfiniteenergy |
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1725998690767732736 |