Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector

The ATLAS Collaboration

doi:10.1016/j.physletb.2018.07.035

Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector

The ATLAS Collaboration

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

The observation of Higgs boson production in association with a top quark pair (tt¯H), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb−1, and considering Higgs boson decays into bb¯, WW⁎, τ+τ−, γγ, and ZZ⁎, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the tt¯H searches using a dataset corresponding to integrated luminosities of 4.5 fb−1 at 7 TeV and 20.3 fb−1 at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total tt¯H production cross section at 13 TeV is measured to be 670 ± 90 (stat.) −100+110 (syst.) fb, in agreement with the Standard Model prediction.

Original language	English
Pages (from-to)	173-191
Number of pages	19
Journal	Physics Letters B
Volume	784
Early online date	24 Jul 2018
DOIs	https://doi.org/10.1016/j.physletb.2018.07.035 https://doi.org/10.1016/j.physletb.2018.07.035
Publication status	Published - 10 Sept 2018

Keywords / Materials (for Non-textual outputs)

p p: scattering | p p: colliding beams | top: pair production | Higgs particle: associated production | Higgs particle: decay modes | bottom: pair production | W: pair production | Z0: pair production | tau: pair production | photon: pair production | Higgs particle: coupling | coupling: Yukawa | CERN LHC Coll | ATLAS | mass spectrum: two-photon | mass spectrum: (4lepton) | Higgs particle: branching ratio | total cross section: measured | experimental results | 13000 GeV-cms

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1806.00425Submitted manuscript, 579 KBLicence: Creative Commons: Attribution (CC-BY)
1-s2.0-S0370269318305732-mainFinal published version, 1.39 MBLicence: CC BY
http://repo.scoap3.org/record/26958/files/main.pdfFinal published version, 1.17 MB

Liza Mijovic
- School of Physics and Astronomy - Chancellor's Fellow
Person: Academic: Research Active (Research Assistant)

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@article{f27c3102a31442faa151f38b694d7c05,

title = "Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector",

abstract = "The observation of Higgs boson production in association with a top quark pair (tt¯H), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb−1, and considering Higgs boson decays into bb¯, WW⁎, τ+τ−, γγ, and ZZ⁎, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the tt¯H searches using a dataset corresponding to integrated luminosities of 4.5 fb−1 at 7 TeV and 20.3 fb−1 at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total tt¯H production cross section at 13 TeV is measured to be 670 ± 90 (stat.) −100+110 (syst.) fb, in agreement with the Standard Model prediction.",

author = "{The ATLAS Collaboration} and Clark, {P J} and Farrington, {S M} and {Faucci Giannelli}, M and Y Gao and Ahmed Hasib and C Leonidopoulos and Martin, {V J} and L Mijovic and Benjamin Wynne",

year = "2018",

month = sep,

day = "10",

doi = "10.1016/j.physletb.2018.07.035",

language = "English",

volume = "784",

pages = "173--191",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

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TY - JOUR

T1 - Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector

AU - The ATLAS Collaboration

AU - Clark, P J

AU - Farrington, S M

AU - Faucci Giannelli, M

AU - Gao, Y

AU - Hasib, Ahmed

AU - Leonidopoulos, C

AU - Martin, V J

AU - Mijovic, L

AU - Wynne, Benjamin

PY - 2018/9/10

Y1 - 2018/9/10

N2 - The observation of Higgs boson production in association with a top quark pair (tt¯H), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb−1, and considering Higgs boson decays into bb¯, WW⁎, τ+τ−, γγ, and ZZ⁎, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the tt¯H searches using a dataset corresponding to integrated luminosities of 4.5 fb−1 at 7 TeV and 20.3 fb−1 at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total tt¯H production cross section at 13 TeV is measured to be 670 ± 90 (stat.) −100+110 (syst.) fb, in agreement with the Standard Model prediction.

AB - The observation of Higgs boson production in association with a top quark pair (tt¯H), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb−1, and considering Higgs boson decays into bb¯, WW⁎, τ+τ−, γγ, and ZZ⁎, the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the tt¯H searches using a dataset corresponding to integrated luminosities of 4.5 fb−1 at 7 TeV and 20.3 fb−1 at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total tt¯H production cross section at 13 TeV is measured to be 670 ± 90 (stat.) −100+110 (syst.) fb, in agreement with the Standard Model prediction.

U2 - 10.1016/j.physletb.2018.07.035

DO - 10.1016/j.physletb.2018.07.035

M3 - Article

SN - 0370-2693

VL - 784

SP - 173

EP - 191

JO - Physics Letters B

JF - Physics Letters B

ER -

Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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Liza Mijovic

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