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Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector

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Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector. / The ATLAS collaboration.
In: Physical Review D, Vol. 97, No. 7, 072003, 09.04.2018.

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The ATLAS collaboration. Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector. Physical Review D. 2018 Apr 9;97(7):072003. doi: 10.1103/PhysRevD.97.072003

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The ATLAS collaboration. / Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector. In: Physical Review D. 2018 ; Vol. 97, No. 7.

Bibtex

@article{36f08d05c85b420aa97642178af759d2,
title = "Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector",
abstract = "A search for the associated production of the Higgs boson with a top quark pair (tt¯H) is reported. The search is performed in multilepton final states using a data set corresponding to an integrated luminosity of 36.1 fb−1 of proton-proton collision data recorded by the ATLAS experiment at a center-of-mass energy √s=13 TeV at the Large Hadron Collider. Higgs boson decays to WW∗, ττ, and ZZ∗ are targeted. Seven final states, categorized by the number and flavor of charged-lepton candidates, are examined for the presence of the Standard Model Higgs boson with a mass of 125 GeV and a pair of top quarks. An excess of events over the expected background from Standard Model processes is found with an observed significance of 4.1 standard deviations, compared to an expectation of 2.8 standard deviations. The best fit for the tt¯H production cross section is σ(tt¯H)=790+230−210 fb, in agreement with the Standard Model prediction of 507+35−50 fb. The combination of this result with other tt¯H searches from the ATLAS experiment using the Higgs boson decay modes to bb¯, γγ and ZZ∗→4ℓ, has an observed significance of 4.2 standard deviations, compared to an expectation of 3.8 standard deviations. This provides evidence for the tt¯H production mode.",
author = "Barton, {Adam Edward} and Michael Beattie and Bertram, {Iain Alexander} and Guennadi Borissov and Bouhova-Thacker, {Evelina Vassileva} and Harald Fox and Henderson, {Robert Charles William} and Jones, {Roger William Lewis} and Vakhtang Kartvelishvili and Long, {Robin Eamonn} and Love, {Peter Allan} and Muenstermann, {Daniel Matthias Alfred} and Parker, {Adam Jackson} and Malcolm Skinner and Maria Smizanska and Walder, {James William} and Wharton, {Andrew Mark} and Ben Whitmore and {The ATLAS collaboration}",
year = "2018",
month = apr,
day = "9",
doi = "10.1103/PhysRevD.97.072003",
language = "English",
volume = "97",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",
number = "7",

}

RIS

TY - JOUR

T1 - Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector

AU - Barton, Adam Edward

AU - Beattie, Michael

AU - Bertram, Iain Alexander

AU - Borissov, Guennadi

AU - Bouhova-Thacker, Evelina Vassileva

AU - Fox, Harald

AU - Henderson, Robert Charles William

AU - Jones, Roger William Lewis

AU - Kartvelishvili, Vakhtang

AU - Long, Robin Eamonn

AU - Love, Peter Allan

AU - Muenstermann, Daniel Matthias Alfred

AU - Parker, Adam Jackson

AU - Skinner, Malcolm

AU - Smizanska, Maria

AU - Walder, James William

AU - Wharton, Andrew Mark

AU - Whitmore, Ben

AU - The ATLAS collaboration

PY - 2018/4/9

Y1 - 2018/4/9

N2 - A search for the associated production of the Higgs boson with a top quark pair (tt¯H) is reported. The search is performed in multilepton final states using a data set corresponding to an integrated luminosity of 36.1 fb−1 of proton-proton collision data recorded by the ATLAS experiment at a center-of-mass energy √s=13 TeV at the Large Hadron Collider. Higgs boson decays to WW∗, ττ, and ZZ∗ are targeted. Seven final states, categorized by the number and flavor of charged-lepton candidates, are examined for the presence of the Standard Model Higgs boson with a mass of 125 GeV and a pair of top quarks. An excess of events over the expected background from Standard Model processes is found with an observed significance of 4.1 standard deviations, compared to an expectation of 2.8 standard deviations. The best fit for the tt¯H production cross section is σ(tt¯H)=790+230−210 fb, in agreement with the Standard Model prediction of 507+35−50 fb. The combination of this result with other tt¯H searches from the ATLAS experiment using the Higgs boson decay modes to bb¯, γγ and ZZ∗→4ℓ, has an observed significance of 4.2 standard deviations, compared to an expectation of 3.8 standard deviations. This provides evidence for the tt¯H production mode.

AB - A search for the associated production of the Higgs boson with a top quark pair (tt¯H) is reported. The search is performed in multilepton final states using a data set corresponding to an integrated luminosity of 36.1 fb−1 of proton-proton collision data recorded by the ATLAS experiment at a center-of-mass energy √s=13 TeV at the Large Hadron Collider. Higgs boson decays to WW∗, ττ, and ZZ∗ are targeted. Seven final states, categorized by the number and flavor of charged-lepton candidates, are examined for the presence of the Standard Model Higgs boson with a mass of 125 GeV and a pair of top quarks. An excess of events over the expected background from Standard Model processes is found with an observed significance of 4.1 standard deviations, compared to an expectation of 2.8 standard deviations. The best fit for the tt¯H production cross section is σ(tt¯H)=790+230−210 fb, in agreement with the Standard Model prediction of 507+35−50 fb. The combination of this result with other tt¯H searches from the ATLAS experiment using the Higgs boson decay modes to bb¯, γγ and ZZ∗→4ℓ, has an observed significance of 4.2 standard deviations, compared to an expectation of 3.8 standard deviations. This provides evidence for the tt¯H production mode.

U2 - 10.1103/PhysRevD.97.072003

DO - 10.1103/PhysRevD.97.072003

M3 - Journal article

VL - 97

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 7

M1 - 072003

ER -