Search for a heavy Standard Model Higgs boson in the channel H->ZZ->llqq using the ATLAS detector

G. Aad; Mogens Dam; Jørgen Beck Hansen; Peter Henrik Hansen; John Renner Hansen; Jørn Dines Hansen; Simon Johann Franz Heisterkamp; Morten Dam Jørgensen; Nele Maria Philomena Boelaert; Esben Bryndt Klinkby; Sascha Mehlhase; Björn Stefan Nilsson; Troels Christian Petersen; Stefania Xella

doi:10.1016/j.physletb.2011.11.056

Search for a heavy Standard Model Higgs boson in the channel H->ZZ->llqq using the ATLAS detector

G. Aad, Mogens Dam, Jørgen Beck Hansen, Peter Henrik Hansen, John Renner Hansen, Jørn Dines Hansen, Simon Johann Franz Heisterkamp, Morten Dam Jørgensen, Nele Maria Philomena Boelaert, Esben Bryndt Klinkby, Sascha Mehlhase, Björn Stefan Nilsson, Troels Christian Petersen, Stefania Xella

9 Citations (Scopus)

Abstract

A search for a heavy Standard Model Higgs boson decaying via H→ZZ→ℓ⁺ℓ^-qq̄, where ℓ=e, μ, is presented. The search is performed using a data set of pp collisions at √s=7 TeV, corresponding to an integrated luminosity of 1.04 fb^-1 collected in 2011 by the ATLAS detector at the CERN LHC collider. No significant excess of events above the estimated background is found. Upper limits at 95% confidence level on the production cross section (relative to that expected from the Standard Model) of a Higgs boson with a mass in the range between 200 and 600 GeV are derived. Within this mass range, there is at present insufficient sensitivity to exclude a Standard Model Higgs boson. For a Higgs boson with a mass of 360 GeV, where the sensitivity is maximal, the observed and expected cross section upper limits are factors of 1.7 and 2.7, respectively, larger than the Standard Model prediction.

Original language	English
Journal	Physics Letters B
Volume	707
Issue number	1
Pages (from-to)	27-45
Number of pages	18
ISSN	0370-2693
DOIs	https://doi.org/10.1016/j.physletb.2011.11.056
Publication status	Published - 16 Jan 2012

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10.1016/j.physletb.2011.11.056

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Aad, G., Dam, M., Hansen, J. B., Hansen, P. H., Hansen, J. R., Hansen, J. D., Heisterkamp, S. J. F., Jørgensen, M. D., Boelaert, N. M. P., Klinkby, E. B., Mehlhase, S., Nilsson, B. S., Petersen, T. C., & Xella, S. (2012). Search for a heavy Standard Model Higgs boson in the channel H->ZZ->llqq using the ATLAS detector. Physics Letters B, 707(1), 27-45. https://doi.org/10.1016/j.physletb.2011.11.056

Aad, G, Dam, M , Hansen, JB , Hansen, PH , Hansen, JR , Hansen, JD, Heisterkamp, SJF, Jørgensen, MD, Boelaert, NMP, Klinkby, EB, Mehlhase, S, Nilsson, BS, Petersen, TC & Xella, S 2012, 'Search for a heavy Standard Model Higgs boson in the channel H->ZZ->llqq using the ATLAS detector', Physics Letters B, vol. 707, no. 1, pp. 27-45. https://doi.org/10.1016/j.physletb.2011.11.056

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title = "Search for a heavy Standard Model Higgs boson in the channel H->ZZ->llqq using the ATLAS detector",

abstract = "A search for a heavy Standard Model Higgs boson decaying via H→ZZ→ℓ+ℓ-q{\=q}, where ℓ=e, μ, is presented. The search is performed using a data set of pp collisions at √s=7 TeV, corresponding to an integrated luminosity of 1.04 fb-1 collected in 2011 by the ATLAS detector at the CERN LHC collider. No significant excess of events above the estimated background is found. Upper limits at 95% confidence level on the production cross section (relative to that expected from the Standard Model) of a Higgs boson with a mass in the range between 200 and 600 GeV are derived. Within this mass range, there is at present insufficient sensitivity to exclude a Standard Model Higgs boson. For a Higgs boson with a mass of 360 GeV, where the sensitivity is maximal, the observed and expected cross section upper limits are factors of 1.7 and 2.7, respectively, larger than the Standard Model prediction.",

author = "G. Aad and Mogens Dam and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Hansen, {John Renner} and Hansen, {J{\o}rn Dines} and Heisterkamp, {Simon Johann Franz} and J{\o}rgensen, {Morten Dam} and Boelaert, {Nele Maria Philomena} and Klinkby, {Esben Bryndt} and Sascha Mehlhase and Nilsson, {Bj{\"o}rn Stefan} and Petersen, {Troels Christian} and Stefania Xella",

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doi = "10.1016/j.physletb.2011.11.056",

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T1 - Search for a heavy Standard Model Higgs boson in the channel H->ZZ->llqq using the ATLAS detector

AU - Aad, G.

AU - Dam, Mogens

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Hansen, John Renner

AU - Hansen, Jørn Dines

AU - Heisterkamp, Simon Johann Franz

AU - Jørgensen, Morten Dam

AU - Boelaert, Nele Maria Philomena

AU - Klinkby, Esben Bryndt

AU - Mehlhase, Sascha

AU - Nilsson, Björn Stefan

AU - Petersen, Troels Christian

AU - Xella, Stefania

PY - 2012/1/16

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N2 - A search for a heavy Standard Model Higgs boson decaying via H→ZZ→ℓ+ℓ-qq̄, where ℓ=e, μ, is presented. The search is performed using a data set of pp collisions at √s=7 TeV, corresponding to an integrated luminosity of 1.04 fb-1 collected in 2011 by the ATLAS detector at the CERN LHC collider. No significant excess of events above the estimated background is found. Upper limits at 95% confidence level on the production cross section (relative to that expected from the Standard Model) of a Higgs boson with a mass in the range between 200 and 600 GeV are derived. Within this mass range, there is at present insufficient sensitivity to exclude a Standard Model Higgs boson. For a Higgs boson with a mass of 360 GeV, where the sensitivity is maximal, the observed and expected cross section upper limits are factors of 1.7 and 2.7, respectively, larger than the Standard Model prediction.

AB - A search for a heavy Standard Model Higgs boson decaying via H→ZZ→ℓ+ℓ-qq̄, where ℓ=e, μ, is presented. The search is performed using a data set of pp collisions at √s=7 TeV, corresponding to an integrated luminosity of 1.04 fb-1 collected in 2011 by the ATLAS detector at the CERN LHC collider. No significant excess of events above the estimated background is found. Upper limits at 95% confidence level on the production cross section (relative to that expected from the Standard Model) of a Higgs boson with a mass in the range between 200 and 600 GeV are derived. Within this mass range, there is at present insufficient sensitivity to exclude a Standard Model Higgs boson. For a Higgs boson with a mass of 360 GeV, where the sensitivity is maximal, the observed and expected cross section upper limits are factors of 1.7 and 2.7, respectively, larger than the Standard Model prediction.

U2 - 10.1016/j.physletb.2011.11.056

DO - 10.1016/j.physletb.2011.11.056

M3 - Journal article

SN - 0370-2693

VL - 707

SP - 27

EP - 45

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

IS - 1

ER -

Search for a heavy Standard Model Higgs boson in the channel H->ZZ->llqq using the ATLAS detector

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