Search for single production of a vector-like quark via a heavy gluon in the 4b final state with the ATLAS detector in pp collisions at root s=8 TeV

G. Aad; B. Abbott; J. Abdallah; O. Abdinov; B Abeloos; R. Aben; M. Abolins; O.S. AbouZeid; H. Abramowicz; H. Abreu; Mogens Dam; Jørn Dines Hansen; Jørgen Beck Hansen; Stefania Xella; Peter Henrik Hansen; Troels Christian Petersen; Almut Maria Pingel; Lotte Ansgaard Thomsen; Alejandro Alonso Diaz; James William Monk; Gorm Aske Gram Krohn Galster

doi:10.1016/j.physletb.2016.04.061

Search for single production of a vector-like quark via a heavy gluon in the 4b final state with the ATLAS detector in pp collisions at root s=8 TeV

G. Aad, B. Abbott, J. Abdallah, O. Abdinov, B Abeloos, R. Aben, M. Abolins, O.S. AbouZeid, H. Abramowicz, H. Abreu, Mogens Dam, Jørn Dines Hansen, Jørgen Beck Hansen, Stefania Xella, Peter Henrik Hansen, Troels Christian Petersen, Almut Maria Pingel, Lotte Ansgaard Thomsen, Alejandro Alonso Diaz, James William MonkGorm Aske Gram Krohn Galster

Experimental Particle Physics

18 Citations (Scopus)

51 Downloads (Pure)

Abstract

A search is performed for the process pp→G*→BHb-/B-Hb→Hbb-→bb-bb-, predicted in composite Higgs scenarios, where G^* is a heavy colour octet vector resonance and B_H a vector-like quark of charge -1/3. The data were obtained from pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.5 fb^-1, recorded by the ATLAS detector at the LHC. The largest background, multijet production, is estimated using a data-driven method. No significant excess of events with respect to Standard Model predictions is observed, and upper limits on the production cross section times branching ratio are set. Comparisons to the predictions from a specific benchmark model are made, resulting in lower mass limits in the two-dimensional mass plane of mG* vs. mBH.

Original language	English
Journal	Physics Letters B
Volume	758
Pages (from-to)	249-268
ISSN	0370-2693
DOIs	https://doi.org/10.1016/j.physletb.2016.04.061
Publication status	Published - 10 Jul 2016

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10.1016/j.physletb.2016.04.061

1-s2.0-S037026931630140X-mainFinal published version, 1.61 MBLicence: CC BY

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Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., Aben, R., Abolins, M., AbouZeid, O. S., Abramowicz, H., Abreu, H., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Petersen, T. C., Pingel, A. M., Thomsen, L. A., Alonso Diaz, A., ... Galster, G. A. G. K. (2016). Search for single production of a vector-like quark via a heavy gluon in the 4b final state with the ATLAS detector in pp collisions at root s=8 TeV. Physics Letters B, 758, 249-268. https://doi.org/10.1016/j.physletb.2016.04.061

Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Aben, R, Abolins, M, AbouZeid, OS, Abramowicz, H, Abreu, H, Dam, M , Hansen, JD , Hansen, JB , Xella, S , Hansen, PH , Petersen, TC, Pingel, AM, Thomsen, LA, Alonso Diaz, A, Monk, JW & Galster, GAGK 2016, 'Search for single production of a vector-like quark via a heavy gluon in the 4b final state with the ATLAS detector in pp collisions at root s=8 TeV', Physics Letters B, vol. 758, pp. 249-268. https://doi.org/10.1016/j.physletb.2016.04.061

@article{bd540290f8914d5d94fc3927a0d907bd,

title = "Search for single production of a vector-like quark via a heavy gluon in the 4b final state with the ATLAS detector in pp collisions at root s=8 TeV",

abstract = "A search is performed for the process pp→G*→BHb-/B-Hb→Hbb-→bb-bb-, predicted in composite Higgs scenarios, where G* is a heavy colour octet vector resonance and BH a vector-like quark of charge -1/3. The data were obtained from pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.5 fb-1, recorded by the ATLAS detector at the LHC. The largest background, multijet production, is estimated using a data-driven method. No significant excess of events with respect to Standard Model predictions is observed, and upper limits on the production cross section times branching ratio are set. Comparisons to the predictions from a specific benchmark model are made, resulting in lower mass limits in the two-dimensional mass plane of mG* vs. mBH.",

author = "G. Aad and B. Abbott and J. Abdallah and O. Abdinov and B Abeloos and R. Aben and M. Abolins and O.S. AbouZeid and H. Abramowicz and H. Abreu and Mogens Dam and Hansen, {J{\o}rn Dines} and Hansen, {J{\o}rgen Beck} and Stefania Xella and Hansen, {Peter Henrik} and Petersen, {Troels Christian} and Pingel, {Almut Maria} and Thomsen, {Lotte Ansgaard} and {Alonso Diaz}, Alejandro and Monk, {James William} and Galster, {Gorm Aske Gram Krohn}",

year = "2016",

month = jul,

day = "10",

doi = "10.1016/j.physletb.2016.04.061",

language = "English",

volume = "758",

pages = "249--268",

journal = "Physics Letters B",

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TY - JOUR

T1 - Search for single production of a vector-like quark via a heavy gluon in the 4b final state with the ATLAS detector in pp collisions at root s=8 TeV

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdinov, O.

AU - Abeloos, B

AU - Aben, R.

AU - Abolins, M.

AU - AbouZeid, O.S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Dam, Mogens

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Xella, Stefania

AU - Hansen, Peter Henrik

AU - Petersen, Troels Christian

AU - Pingel, Almut Maria

AU - Thomsen, Lotte Ansgaard

AU - Alonso Diaz, Alejandro

AU - Monk, James William

AU - Galster, Gorm Aske Gram Krohn

PY - 2016/7/10

Y1 - 2016/7/10

N2 - A search is performed for the process pp→G*→BHb-/B-Hb→Hbb-→bb-bb-, predicted in composite Higgs scenarios, where G* is a heavy colour octet vector resonance and BH a vector-like quark of charge -1/3. The data were obtained from pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.5 fb-1, recorded by the ATLAS detector at the LHC. The largest background, multijet production, is estimated using a data-driven method. No significant excess of events with respect to Standard Model predictions is observed, and upper limits on the production cross section times branching ratio are set. Comparisons to the predictions from a specific benchmark model are made, resulting in lower mass limits in the two-dimensional mass plane of mG* vs. mBH.

AB - A search is performed for the process pp→G*→BHb-/B-Hb→Hbb-→bb-bb-, predicted in composite Higgs scenarios, where G* is a heavy colour octet vector resonance and BH a vector-like quark of charge -1/3. The data were obtained from pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.5 fb-1, recorded by the ATLAS detector at the LHC. The largest background, multijet production, is estimated using a data-driven method. No significant excess of events with respect to Standard Model predictions is observed, and upper limits on the production cross section times branching ratio are set. Comparisons to the predictions from a specific benchmark model are made, resulting in lower mass limits in the two-dimensional mass plane of mG* vs. mBH.

U2 - 10.1016/j.physletb.2016.04.061

DO - 10.1016/j.physletb.2016.04.061

M3 - Journal article

SN - 0370-2693

VL - 758

SP - 249

EP - 268

JO - Physics Letters B

JF - Physics Letters B

ER -

Search for single production of a vector-like quark via a heavy gluon in the 4b final state with the ATLAS detector in pp collisions at root s=8 TeV

Abstract

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