Standard Model EFTs via on-shell methods

Abstract We present the Standard Model Effective Field Theories (SMEFT) from purely on-shell arguments. Starting from few basics assumptions such as Poincaré invariance and locality, we classify all the renormalisable and non-renormalisable interactions at lowest order in the couplings. From these b...

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Autores principales:	Manuel Accettulli Huber, Stefano De Angelis
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Scattering Amplitudes Effective Field Theories Beyond Standard Model Renormalization Group Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/97fc00be3a0a4733a05f2a0a5d161dec
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id	oai:doaj.org-article:97fc00be3a0a4733a05f2a0a5d161dec
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spelling	oai:doaj.org-article:97fc00be3a0a4733a05f2a0a5d161dec2021-12-05T12:25:01ZStandard Model EFTs via on-shell methods10.1007/JHEP11(2021)2211029-8479https://doaj.org/article/97fc00be3a0a4733a05f2a0a5d161dec2021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)221https://doaj.org/toc/1029-8479Abstract We present the Standard Model Effective Field Theories (SMEFT) from purely on-shell arguments. Starting from few basics assumptions such as Poincaré invariance and locality, we classify all the renormalisable and non-renormalisable interactions at lowest order in the couplings. From these building blocks, we review how locality and unitarity enforce Lie algebra structures to appear in the S-matrix elements together with relations among couplings (and hypercharges). Furthermore, we give a fully on-shell algorithm to compute any higher-point tree-level amplitude (or form factor) in generic EFTs, bypassing BCFW-like recursion relations which are known to be problematic when non-renormalisable interactions are involved. Finally, using known amplitudes techniques we compute the mixing matrix of SMEFT marginal interactions up to mass dimension 8, to linear order in the effective interactions.Manuel Accettulli HuberStefano De AngelisSpringerOpenarticleScattering AmplitudesEffective Field TheoriesBeyond Standard ModelRenormalization GroupNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-55 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Scattering Amplitudes Effective Field Theories Beyond Standard Model Renormalization Group Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Scattering Amplitudes Effective Field Theories Beyond Standard Model Renormalization Group Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Manuel Accettulli Huber Stefano De Angelis Standard Model EFTs via on-shell methods
description	Abstract We present the Standard Model Effective Field Theories (SMEFT) from purely on-shell arguments. Starting from few basics assumptions such as Poincaré invariance and locality, we classify all the renormalisable and non-renormalisable interactions at lowest order in the couplings. From these building blocks, we review how locality and unitarity enforce Lie algebra structures to appear in the S-matrix elements together with relations among couplings (and hypercharges). Furthermore, we give a fully on-shell algorithm to compute any higher-point tree-level amplitude (or form factor) in generic EFTs, bypassing BCFW-like recursion relations which are known to be problematic when non-renormalisable interactions are involved. Finally, using known amplitudes techniques we compute the mixing matrix of SMEFT marginal interactions up to mass dimension 8, to linear order in the effective interactions.
format	article
author	Manuel Accettulli Huber Stefano De Angelis
author_facet	Manuel Accettulli Huber Stefano De Angelis
author_sort	Manuel Accettulli Huber
title	Standard Model EFTs via on-shell methods
title_short	Standard Model EFTs via on-shell methods
title_full	Standard Model EFTs via on-shell methods
title_fullStr	Standard Model EFTs via on-shell methods
title_full_unstemmed	Standard Model EFTs via on-shell methods
title_sort	standard model efts via on-shell methods
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/97fc00be3a0a4733a05f2a0a5d161dec
work_keys_str_mv	AT manuelaccettullihuber standardmodeleftsviaonshellmethods AT stefanodeangelis standardmodeleftsviaonshellmethods
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Standard Model EFTs via on-shell methods

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