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=13TeV

the CMS Collaboration

doi:10.1016/j.physletb.2017.11.043

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=13TeV

the CMS Collaboration

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Abstract

The cross sections for the production of tt¯bb¯ and tt¯jj events and their ratio σ_tt¯bb¯/σ_tt¯jj are measured using data corresponding to an integrated luminosity of 2.3 fb⁻¹collected in pp collisions at s=13 TeV 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 σ_tt¯bb¯ is 4.0±0.6(stat)±1.3(syst) pb and σ_tt¯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.

Original language	English
Pages (from-to)	355-378
Number of pages	24
Journal	Physics Letters B
Volume	776
Early online date	23 Nov 2017
DOIs	https://doi.org/10.1016/j.physletb.2017.11.043
Publication status	Published - 10 Jan 2018

Keywords

CMS
Physics
Top quark

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@article{078433dfbc4e4b04a600834663f932ea,

title = "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=13TeV",

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=13 TeV 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.",

keywords = "CMS, Physics, Top quark",

author = "Robin Aggleton and Fionn Ball and Lana Beck and Jim Brooke and Douglas Burns and Emyr Clement and David Cussans and H. Fl{\"a}cher and Joel Goldstein and Mark Grimes and Greg Heath and Helen Heath and Jeson Jacob and Luke Kreczko and Chris Lucas and David Newbold and Sudarshan Paramesvaran and Tony Poll and Tai Sakuma and {Seif El Nasr}, Sarah and Duncan Smith and Vincent Smith and {the CMS Collaboration}",

year = "2018",

month = jan,

day = "10",

doi = "10.1016/j.physletb.2017.11.043",

language = "English",

volume = "776",

pages = "355--378",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "North-Holland Publishing Company",

}

TY - JOUR

T1 - 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=13TeV

AU - Aggleton, Robin

AU - Ball, Fionn

AU - Beck, Lana

AU - Brooke, Jim

AU - Burns, Douglas

AU - Clement, Emyr

AU - Cussans, David

AU - Flächer, H.

AU - Goldstein, Joel

AU - Grimes, Mark

AU - Heath, Greg

AU - Heath, Helen

AU - Jacob, Jeson

AU - Kreczko, Luke

AU - Lucas, Chris

AU - Newbold, David

AU - Paramesvaran, Sudarshan

AU - Poll, Tony

AU - Sakuma, Tai

AU - Seif El Nasr, Sarah

AU - Smith, Duncan

AU - Smith, Vincent

AU - the CMS Collaboration

PY - 2018/1/10

Y1 - 2018/1/10

N2 - 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=13 TeV 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.

AB - 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=13 TeV 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.

KW - CMS

KW - Physics

KW - Top quark

UR - http://www.scopus.com/inward/record.url?scp=85037659942&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2017.11.043

DO - 10.1016/j.physletb.2017.11.043

M3 - Article (Academic Journal)

AN - SCOPUS:85037659942

SN - 0370-2693

VL - 776

SP - 355

EP - 378

JO - Physics Letters B

JF - Physics Letters B

ER -

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=13TeV

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