Measurement of the ttproduction cross-section using eμ events with b-tagged jets in ppcollisions at √s=13 TeV with the ATLAS detector
Aaboud, M ; Aad, G ; Abbott, B. ; Abdallah, J ; Abdinov, O ; Abeloos, B ; Åkesson, Torsten LU
; Bocchetta, Simona
LU
; BRYNGEMARK, LENE
LU
and Doglioni, Caterina
LU
, et al.
(2016)
In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
761.
p.136-157
- Abstract
- This paper describes a measurement of the inclusive top quark pair production cross-section (σtt̄) with a data sample of 3.2 fb−1of proton-proton collisions at a centre-of-mass energy of √s=13 TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron-muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b-tagged jets are counted and used to determine simultaneously σtt̄and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is... (More)
- This paper describes a measurement of the inclusive top quark pair production cross-section (σtt̄) with a data sample of 3.2 fb−1of proton-proton collisions at a centre-of-mass energy of √s=13 TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron-muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b-tagged jets are counted and used to determine simultaneously σtt̄and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: σtt̄ = 818±8 (stat)± 27 (syst)±19 (lumi)± 12 (beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented. © 2016 The Author(s). (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/0c5ea542-734a-4649-b646-43d147834381
- author
- Aaboud, M
; Aad, G
; Abbott, B.
; Abdallah, J
; Abdinov, O
; Abeloos, B
; Åkesson, Torsten
LU
; Bocchetta, Simona
LU
; BRYNGEMARK, LENE
LU
and Doglioni, Caterina
LU
, et al. (More)
- Aaboud, M
; Aad, G
; Abbott, B.
; Abdallah, J
; Abdinov, O
; Abeloos, B
; Åkesson, Torsten
LU
; Bocchetta, Simona
LU
; BRYNGEMARK, LENE
LU
; Doglioni, Caterina
LU
; Floderus, Anders
LU
; Hedberg, Vincent
LU
; Jarlskog, Göran
LU
; Lytken, Else
LU
; Mjörnmark, Ulf
LU
; Smirnova, Oxana
LU
and Viazlo, Oleksandr
LU
(Less)
- author collaboration
- organization
- publishing date
- 2016
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- volume
- 761
- pages
- 22 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85040840865
- ISSN
- 0370-2693
- DOI
- 10.1016/j.physletb.2016.08.019
- language
- English
- LU publication?
- yes
- additional info
- Cited By :13 Export Date: 21 July 2017
- id
- 0c5ea542-734a-4649-b646-43d147834381
- date added to LUP
- 2017-07-21 07:28:25
- date last changed
- 2023-04-07 19:39:45
@article{0c5ea542-734a-4649-b646-43d147834381,
abstract = {{This paper describes a measurement of the inclusive top quark pair production cross-section (σtt̄) with a data sample of 3.2 fb−1of proton-proton collisions at a centre-of-mass energy of √s=13 TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron-muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b-tagged jets are counted and used to determine simultaneously σtt̄and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: σtt̄ = 818±8 (stat)± 27 (syst)±19 (lumi)± 12 (beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented. © 2016 The Author(s).}},
author = {{Aaboud, M and Aad, G and Abbott, B. and Abdallah, J and Abdinov, O and Abeloos, B and Åkesson, Torsten and Bocchetta, Simona and BRYNGEMARK, LENE and Doglioni, Caterina and Floderus, Anders and Hedberg, Vincent and Jarlskog, Göran and Lytken, Else and Mjörnmark, Ulf and Smirnova, Oxana and Viazlo, Oleksandr}},
issn = {{0370-2693}},
language = {{eng}},
pages = {{136--157}},
publisher = {{Elsevier}},
series = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}},
title = {{Measurement of the ttproduction cross-section using eμ events with b-tagged jets in ppcollisions at √s=13 TeV with the ATLAS detector}},
url = {{http://dx.doi.org/10.1016/j.physletb.2016.08.019}},
doi = {{10.1016/j.physletb.2016.08.019}},
volume = {{761}},
year = {{2016}},
}