Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC

Abstract We present a global interpretation of Higgs, diboson, and top quark production and decay measurements from the LHC in the framework of the Standard Model Effective Field Theory (SMEFT) at dimension six. We constrain simultaneously 36 independent directions in its parameter space, and compar...

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Autores principales:	The SMEFiT collaboration, Jacob J. Ethier, Giacomo Magni, Fabio Maltoni, Luca Mantani, Emanuele R. Nocera, Juan Rojo, Emma Slade, Eleni Vryonidou, Cen Zhang
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Effective Field Theories Higgs Physics Beyond Standard Model Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/211db0165e464266b95edc8c98aea660
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spelling	oai:doaj.org-article:211db0165e464266b95edc8c98aea6602021-11-14T12:40:44ZCombined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC10.1007/JHEP11(2021)0891029-8479https://doaj.org/article/211db0165e464266b95edc8c98aea6602021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)089https://doaj.org/toc/1029-8479Abstract We present a global interpretation of Higgs, diboson, and top quark production and decay measurements from the LHC in the framework of the Standard Model Effective Field Theory (SMEFT) at dimension six. We constrain simultaneously 36 independent directions in its parameter space, and compare the outcome of the global analysis with that from individual and two-parameter fits. Our results are obtained by means of state-of-the-art theoretical calculations for the SM and the EFT cross-sections, and account for both linear and quadratic corrections in the 1/Λ2 expansion. We demonstrate how the inclusion of NLO QCD and O $$ \mathcal{O} $$ (Λ −4) effects is instrumental to accurately map the posterior distributions associated to the fitted Wilson coefficients. We assess the interplay and complementarity between the top quark, Higgs, and diboson measurements, deploy a variety of statistical estimators to quantify the impact of each dataset in the parameter space, and carry out fits in BSM-inspired scenarios such as the top-philic model. Our results represent a stepping stone in the ongoing program of model-independent searches at the LHC from precision measurements, and pave the way towards yet more global SMEFT interpretations extended to other high-p T processes as well as to low-energy observables.The SMEFiT collaborationJacob J. EthierGiacomo MagniFabio MaltoniLuca MantaniEmanuele R. NoceraJuan RojoEmma SladeEleni VryonidouCen ZhangSpringerOpenarticleEffective Field TheoriesHiggs PhysicsBeyond Standard ModelNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-97 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Effective Field Theories Higgs Physics Beyond Standard Model Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Effective Field Theories Higgs Physics Beyond Standard Model Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 The SMEFiT collaboration Jacob J. Ethier Giacomo Magni Fabio Maltoni Luca Mantani Emanuele R. Nocera Juan Rojo Emma Slade Eleni Vryonidou Cen Zhang Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC
description	Abstract We present a global interpretation of Higgs, diboson, and top quark production and decay measurements from the LHC in the framework of the Standard Model Effective Field Theory (SMEFT) at dimension six. We constrain simultaneously 36 independent directions in its parameter space, and compare the outcome of the global analysis with that from individual and two-parameter fits. Our results are obtained by means of state-of-the-art theoretical calculations for the SM and the EFT cross-sections, and account for both linear and quadratic corrections in the 1/Λ2 expansion. We demonstrate how the inclusion of NLO QCD and O $$ \mathcal{O} $$ (Λ −4) effects is instrumental to accurately map the posterior distributions associated to the fitted Wilson coefficients. We assess the interplay and complementarity between the top quark, Higgs, and diboson measurements, deploy a variety of statistical estimators to quantify the impact of each dataset in the parameter space, and carry out fits in BSM-inspired scenarios such as the top-philic model. Our results represent a stepping stone in the ongoing program of model-independent searches at the LHC from precision measurements, and pave the way towards yet more global SMEFT interpretations extended to other high-p T processes as well as to low-energy observables.
format	article
author	The SMEFiT collaboration Jacob J. Ethier Giacomo Magni Fabio Maltoni Luca Mantani Emanuele R. Nocera Juan Rojo Emma Slade Eleni Vryonidou Cen Zhang
author_facet	The SMEFiT collaboration Jacob J. Ethier Giacomo Magni Fabio Maltoni Luca Mantani Emanuele R. Nocera Juan Rojo Emma Slade Eleni Vryonidou Cen Zhang
author_sort	The SMEFiT collaboration
title	Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC
title_short	Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC
title_full	Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC
title_fullStr	Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC
title_full_unstemmed	Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC
title_sort	combined smeft interpretation of higgs, diboson, and top quark data from the lhc
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/211db0165e464266b95edc8c98aea660
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Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC

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