Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons
Measurements of differential top quark pair t[line over t] cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The data were recorded by the CMS experiment at the CERN LHC in 2016 and correspon...
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| Format: | Article |
| Language: | en_US |
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2020
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| Online Access: | https://hdl.handle.net/1721.1/124858 |
| _version_ | 1826193398268166144 |
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| author | CMS Collaboration |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics CMS Collaboration |
| author_sort | CMS Collaboration |
| collection | MIT |
| description | Measurements of differential top quark pair t[line over t] cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The data were recorded by the CMS experiment at the CERN LHC in 2016 and correspond to an integrated luminosity of 35.9 fb−1. The differential cross sections are presented as functions of kinematic observables of the top quarks and their decay products, the t[line over t] system, and the total number of jets in the event. The differential cross sections are defined both with particle-level objects in a fiducial phase space close to that of the detector acceptance and with parton-level top quarks in the full phase space. All results are compared with standard model predictions from Monte Carlo simulations with next-to-leading-order (NLO) accuracy in quantum chromodynamics (QCD) at matrix-element level interfaced to parton-shower simulations. Where possible, parton-level results are compared to calculations with beyond-NLO precision in QCD. Significant disagreement is observed between data and all predictions for several observables. The measurements are used to constrain the top quark chromomagnetic dipole moment in an effective field theory framework at NLO in QCD and to extract t[line over t] and leptonic charge asymmetries. ©2019 |
| first_indexed | 2024-09-23T09:38:26Z |
| format | Article |
| id | mit-1721.1/124858 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:38:26Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | mit-1721.1/1248582022-09-26T12:48:09Z Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons Measurements of t[line over t] differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons CMS Collaboration Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Measurements of differential top quark pair t[line over t] cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The data were recorded by the CMS experiment at the CERN LHC in 2016 and correspond to an integrated luminosity of 35.9 fb−1. The differential cross sections are presented as functions of kinematic observables of the top quarks and their decay products, the t[line over t] system, and the total number of jets in the event. The differential cross sections are defined both with particle-level objects in a fiducial phase space close to that of the detector acceptance and with parton-level top quarks in the full phase space. All results are compared with standard model predictions from Monte Carlo simulations with next-to-leading-order (NLO) accuracy in quantum chromodynamics (QCD) at matrix-element level interfaced to parton-shower simulations. Where possible, parton-level results are compared to calculations with beyond-NLO precision in QCD. Significant disagreement is observed between data and all predictions for several observables. The measurements are used to constrain the top quark chromomagnetic dipole moment in an effective field theory framework at NLO in QCD and to extract t[line over t] and leptonic charge asymmetries. ©2019 2020-04-24T17:45:05Z 2020-04-24T17:45:05Z 2019-02 2018-11 Article http://purl.org/eprint/type/JournalArticle 1029-8479 https://hdl.handle.net/1721.1/124858 CMS Collaboration (Sirunyan, A.M., et al.), "Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons." Journal of high energy physics 2019 (Feb. 2019): no. 149 doi 10.1007/JHEP02(2019)149 ©2019 Author(s) en_US 10.1007/JHEP02(2019)149 Journal of high energy physics Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Springer |
| spellingShingle | CMS Collaboration Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons |
| title | Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons |
| title_full | Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons |
| title_fullStr | Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons |
| title_full_unstemmed | Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons |
| title_short | Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons |
| title_sort | measurements of tt differential cross sections in proton proton collisions at √s 13 tev using events containing two leptons |
| url | https://hdl.handle.net/1721.1/124858 |
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