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Measurements of tt‾ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at √s = 13 TeV

Measurements of tt‾ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at √s = 13 TeV
Measurements of tt‾ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at √s = 13 TeV
The cross sections for the production of tt¯bb¯ and tt¯jj events and their ratio σtt¯bb¯/σtt¯jj are measured using data corresponding to an integrated luminosity of 2.3 fb−1collected in pp collisions at s=13TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and at least four reconstructed jets, including at least two identified as b quark jets, in the final state are selected. In the full phase space, the measured ratio is 0.022±0.003(stat)±0.006(syst), the cross section σtt¯bb¯ is 4.0±0.6(stat)±1.3(syst)pb and σtt¯jj is 184±6(stat)±33(syst)pb. The measurements are compared with the standard model expectations obtained from a powheg simulation at next-to-leading-order interfaced with pythia.
0370-2693
355-378
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Belyaev, A. , The CMS Collaboration (2018) Measurements of tt‾ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at √s = 13 TeV. Physics Letters B, 776, 355-378. (doi:10.1016/j.physletb.2017.11.043).

Record type: Article

Abstract

The cross sections for the production of tt¯bb¯ and tt¯jj events and their ratio σtt¯bb¯/σtt¯jj are measured using data corresponding to an integrated luminosity of 2.3 fb−1collected in pp collisions at s=13TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and at least four reconstructed jets, including at least two identified as b quark jets, in the final state are selected. In the full phase space, the measured ratio is 0.022±0.003(stat)±0.006(syst), the cross section σtt¯bb¯ is 4.0±0.6(stat)±1.3(syst)pb and σtt¯jj is 184±6(stat)±33(syst)pb. The measurements are compared with the standard model expectations obtained from a powheg simulation at next-to-leading-order interfaced with pythia.

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Accepted/In Press date: 21 November 2017
e-pub ahead of print date: 23 November 2017
Published date: 10 January 2018

Identifiers

Local EPrints ID: 417525
URI: https://eprints.soton.ac.uk/id/eprint/417525
ISSN: 0370-2693
PURE UUID: f86fb7cd-ea03-4945-b205-c43f055fbb2e
ORCID for A. Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 02 Feb 2018 17:30
Last modified: 06 Jun 2018 12:38

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