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

M Aaboud; Torsten Åkesson; Simona Bocchetta; Eric Corrigan; Caterina Doglioni; Kristian Gregersen; Eva Brottmann Hansen; Vincent Hedberg; Göran Jarlskog; Charles Kalderon; Edgar Kellermann; Balazs Konya; Else Lytken; Katja Mankinen; Ulf Mjörnmark; Ruth Pöttgen; Trine Poulsen; Oxana Smirnova; 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

M Aaboud, Torsten Åkesson, Simona Bocchetta, Eric Corrigan, Caterina Doglioni, Kristian Gregersen, Eva Brottmann Hansen, Vincent Hedberg, Göran Jarlskog, Charles Kalderon, Edgar Kellermann, Balazs Konya, Else Lytken, Katja Mankinen, Ulf Mjörnmark, Ruth Pöttgen, Trine Poulsen, Oxana Smirnova, ATLAS Collaboration

Mohamed Premier University

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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. © 2018 The Author(s)

Original language	English
Pages (from-to)	173-191
Number of pages	19
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	784
DOIs	https://doi.org/10.1016/j.physletb.2018.07.035
Publication status	Published - 2018

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Export Date: 7 September 2018

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Subatomic Physics

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10.1016/j.physletb.2018.07.035

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Aaboud, M., Åkesson, T., Bocchetta, S., Corrigan, E., Doglioni, C., Gregersen, K., Brottmann Hansen, E., Hedberg, V., Jarlskog, G., Kalderon, C., Kellermann, E., Konya, B., Lytken, E., Mankinen, K., Mjörnmark, U., Pöttgen, R., Poulsen, T., Smirnova, O., & ATLAS Collaboration (2018). Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 784, 173-191. https://doi.org/10.1016/j.physletb.2018.07.035

@article{7bc8b49988bd44628d9404db914ee9f1,

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. {\textcopyright} 2018 The Author(s)",

author = "M Aaboud and Torsten {\AA}kesson and Simona Bocchetta and Eric Corrigan and Caterina Doglioni and Kristian Gregersen and {Brottmann Hansen}, Eva and Vincent Hedberg and G{\"o}ran Jarlskog and Charles Kalderon and Edgar Kellermann and Balazs Konya and Else Lytken and Katja Mankinen and Ulf Mj{\"o}rnmark and Ruth P{\"o}ttgen and Trine Poulsen and Oxana Smirnova and {ATLAS Collaboration}",

note = "Export Date: 7 September 2018",

year = "2018",

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

language = "English",

volume = "784",

pages = "173--191",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

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Aaboud, M, Åkesson, T, Bocchetta, S, Corrigan, E, Doglioni, C, Gregersen, K, Brottmann Hansen, E, Hedberg, V , Jarlskog, G, Kalderon, C, Kellermann, E, Konya, B , Lytken, E, Mankinen, K, Mjörnmark, U, Pöttgen, R, Poulsen, T, Smirnova, O & ATLAS Collaboration 2018, 'Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 784, pp. 173-191. https://doi.org/10.1016/j.physletb.2018.07.035

TY - JOUR

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

AU - Aaboud, M

AU - Åkesson, Torsten

AU - Bocchetta, Simona

AU - Corrigan, Eric

AU - Doglioni, Caterina

AU - Gregersen, Kristian

AU - Brottmann Hansen, Eva

AU - Hedberg, Vincent

AU - Jarlskog, Göran

AU - Kalderon, Charles

AU - Kellermann, Edgar

AU - Konya, Balazs

AU - Lytken, Else

AU - Mankinen, Katja

AU - Mjörnmark, Ulf

AU - Pöttgen, Ruth

AU - Poulsen, Trine

AU - Smirnova, Oxana

AU - ATLAS Collaboration

N1 - Export Date: 7 September 2018

PY - 2018

Y1 - 2018

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. © 2018 The Author(s)

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. © 2018 The Author(s)

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, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

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

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