Measurement of the charge asymmetry in highly boosted top-quark pair production in √s=8TeV pp collision data collected by the ATLAS experiment

ATLAS Collaboration

doi:10.1016/j.physletb.2016.02.055

Measurement of the charge asymmetry in highly boosted top-quark pair production in √s=8TeV pp collision data collected by the ATLAS experiment

ATLAS Collaboration

Physics and Astronomy

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Abstract

In the $pp \rightarrow t\bar{t}$ process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb$^{-1}$ of $pp$ collision data at $\sqrt{s} =$ 8 TeV collected by the ATLAS experiment at the LHC, using reconstruction techniques specifically designed for the decay topology of highly boosted top quarks. The charge asymmetry in a fiducial region with large invariant mass of the top-quark pair ($m_{t\bar{t}} > $ 0.75 TeV) and an absolute rapidity difference of the top and anti-top quark candidates within $-$2 $

Original language	English
Pages (from-to)	52–71
Journal	Physics Letters B
Volume	756
Early online date	2 Mar 2016
DOIs	https://doi.org/10.1016/j.physletb.2016.02.055
Publication status	Published - 10 May 2016

Bibliographical note

19 pages plus author list (36 pages total), 3 figures, 2 tables. Submitted to Physics Letters B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-10/

Keywords

hep-ex

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1-s2.0-S0370269316001519-mainFinal published version, 1.9 MBLicence: Creative Commons: Attribution (CC BY)

Cite this

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title = "Measurement of the charge asymmetry in highly boosted top-quark pair production in √s=8TeV pp collision data collected by the ATLAS experiment",

abstract = "In the $pp \rightarrow t\bar{t}$ process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb$^{-1}$ of $pp$ collision data at $\sqrt{s} =$ 8 TeV collected by the ATLAS experiment at the LHC, using reconstruction techniques specifically designed for the decay topology of highly boosted top quarks. The charge asymmetry in a fiducial region with large invariant mass of the top-quark pair ($m_{t\bar{t}} > $ 0.75 TeV) and an absolute rapidity difference of the top and anti-top quark candidates within $-$2 $",

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author = "{ATLAS Collaboration} and Paul Newman",

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AU - Newman, Paul

N1 - 19 pages plus author list (36 pages total), 3 figures, 2 tables. Submitted to Physics Letters B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-10/

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N2 - In the $pp \rightarrow t\bar{t}$ process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb$^{-1}$ of $pp$ collision data at $\sqrt{s} =$ 8 TeV collected by the ATLAS experiment at the LHC, using reconstruction techniques specifically designed for the decay topology of highly boosted top quarks. The charge asymmetry in a fiducial region with large invariant mass of the top-quark pair ($m_{t\bar{t}} > $ 0.75 TeV) and an absolute rapidity difference of the top and anti-top quark candidates within $-$2 $

AB - In the $pp \rightarrow t\bar{t}$ process the angular distributions of top and anti-top quarks are expected to present a subtle difference, which could be enhanced by processes not included in the Standard Model. This Letter presents a measurement of the charge asymmetry in events where the top-quark pair is produced with a large invariant mass. The analysis is performed on 20.3 fb$^{-1}$ of $pp$ collision data at $\sqrt{s} =$ 8 TeV collected by the ATLAS experiment at the LHC, using reconstruction techniques specifically designed for the decay topology of highly boosted top quarks. The charge asymmetry in a fiducial region with large invariant mass of the top-quark pair ($m_{t\bar{t}} > $ 0.75 TeV) and an absolute rapidity difference of the top and anti-top quark candidates within $-$2 $

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DO - 10.1016/j.physletb.2016.02.055

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JO - Physics Letters B

JF - Physics Letters B

ER -

Measurement of the charge asymmetry in highly boosted top-quark pair production in √s=8TeV pp collision data collected by the ATLAS experiment

Abstract

Bibliographical note

Keywords

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