A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector
Abstract We present a novel framework for carrying out global analyses of the Standard Model Effective Field Theory (SMEFT) at dimension-six: SMEFiT. This approach is based on the Monte Carlo replica method for deriving a faithful estimate of the experimental and theoretical uncertainties and enable...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-04-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | http://link.springer.com/article/10.1007/JHEP04(2019)100 |
| _version_ | 1818657023606128640 |
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| author | Nathan P. Hartland Fabio Maltoni Emanuele R. Nocera Juan Rojo Emma Slade Eleni Vryonidou Cen Zhang |
| author_facet | Nathan P. Hartland Fabio Maltoni Emanuele R. Nocera Juan Rojo Emma Slade Eleni Vryonidou Cen Zhang |
| author_sort | Nathan P. Hartland |
| collection | DOAJ |
| description | Abstract We present a novel framework for carrying out global analyses of the Standard Model Effective Field Theory (SMEFT) at dimension-six: SMEFiT. This approach is based on the Monte Carlo replica method for deriving a faithful estimate of the experimental and theoretical uncertainties and enables one to construct the probability distribution in the space of the SMEFT degrees of freedom. As a proof of concept of the SMEFiT methodology, we present a first study of the constraints on the SMEFT provided by top quark production measurements from the LHC. Our analysis includes more than 30 independent measurements from 10 different processes at s $$ \sqrt{s} $$ = 8 and 13 TeV such as inclusive t t ¯ $$ t\overline{t} $$ and single-top production and the associated production of top quarks with weak vector bosons and the Higgs boson. State-of-the-art theoretical calculations are adopted both for the Standard Model and for the SMEFT contributions, where in the latter case NLO QCD corrections are included for the majority of processes. We derive bounds for the 34 degrees of freedom relevant for the interpretation of the LHC top quark data and compare these bounds with previously reported constraints. Our study illustrates the significant potential of LHC precision measurements to constrain physics beyond the Standard Model in a model-independent way, and paves the way towards a global analysis of the SMEFT. |
| first_indexed | 2024-12-17T03:34:53Z |
| format | Article |
| id | doaj.art-5d5e7e44c5c84f51affcbec292c0071d |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-17T03:34:53Z |
| publishDate | 2019-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-5d5e7e44c5c84f51affcbec292c0071d2022-12-21T22:05:09ZengSpringerOpenJournal of High Energy Physics1029-84792019-04-012019417810.1007/JHEP04(2019)100A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sectorNathan P. Hartland0Fabio Maltoni1Emanuele R. Nocera2Juan Rojo3Emma Slade4Eleni Vryonidou5Cen Zhang6Department of Physics and Astronomy, Vrije Universiteit AmsterdamCentre for Cosmology, Particle Physics and Phenomenology (CP3), Université Catholique de LouvainNikhef Theory GroupDepartment of Physics and Astronomy, Vrije Universiteit AmsterdamRudolf Peierls Centre for Theoretical Physics, University of Oxford, Clarendon LaboratoryTheoretical Physics Department, CERNInstitute of High Energy Physics, and School of Physical Sciences, University of Chinese Academy of SciencesAbstract We present a novel framework for carrying out global analyses of the Standard Model Effective Field Theory (SMEFT) at dimension-six: SMEFiT. This approach is based on the Monte Carlo replica method for deriving a faithful estimate of the experimental and theoretical uncertainties and enables one to construct the probability distribution in the space of the SMEFT degrees of freedom. As a proof of concept of the SMEFiT methodology, we present a first study of the constraints on the SMEFT provided by top quark production measurements from the LHC. Our analysis includes more than 30 independent measurements from 10 different processes at s $$ \sqrt{s} $$ = 8 and 13 TeV such as inclusive t t ¯ $$ t\overline{t} $$ and single-top production and the associated production of top quarks with weak vector bosons and the Higgs boson. State-of-the-art theoretical calculations are adopted both for the Standard Model and for the SMEFT contributions, where in the latter case NLO QCD corrections are included for the majority of processes. We derive bounds for the 34 degrees of freedom relevant for the interpretation of the LHC top quark data and compare these bounds with previously reported constraints. Our study illustrates the significant potential of LHC precision measurements to constrain physics beyond the Standard Model in a model-independent way, and paves the way towards a global analysis of the SMEFT.http://link.springer.com/article/10.1007/JHEP04(2019)100Beyond Standard ModelEffective Field TheoriesPerturbative QCD |
| spellingShingle | Nathan P. Hartland Fabio Maltoni Emanuele R. Nocera Juan Rojo Emma Slade Eleni Vryonidou Cen Zhang A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector Journal of High Energy Physics Beyond Standard Model Effective Field Theories Perturbative QCD |
| title | A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector |
| title_full | A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector |
| title_fullStr | A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector |
| title_full_unstemmed | A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector |
| title_short | A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector |
| title_sort | monte carlo global analysis of the standard model effective field theory the top quark sector |
| topic | Beyond Standard Model Effective Field Theories Perturbative QCD |
| url | http://link.springer.com/article/10.1007/JHEP04(2019)100 |
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