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  • art%3A10.1007%2FJHEP08%282015%29105

    Rights statement: Open Access, Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP3. Date of Acceptance: 10/07/2015 Evidence of Acceptance on Publisher PDF

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Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at √ s =8 TeV with the ATLAS detector

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at √ s =8 TeV with the ATLAS detector. / The ATLAS collaboration.
In: Journal of High Energy Physics, No. 8, 105, 08.2015.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

The ATLAS collaboration 2015, 'Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at √ s =8 TeV with the ATLAS detector', Journal of High Energy Physics, no. 8, 105. https://doi.org/10.1007/JHEP08(2015)105

APA

The ATLAS collaboration (2015). Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at √ s =8 TeV with the ATLAS detector. Journal of High Energy Physics, (8), Article 105. https://doi.org/10.1007/JHEP08(2015)105

Vancouver

The ATLAS collaboration. Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at √ s =8 TeV with the ATLAS detector. Journal of High Energy Physics. 2015 Aug;(8):105. doi: 10.1007/JHEP08(2015)105

Author

The ATLAS collaboration. / Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at √ s =8 TeV with the ATLAS detector. In: Journal of High Energy Physics. 2015 ; No. 8.

Bibtex

@article{8b4e73e445a74cef98fadf19febe91de,
title = "Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at √ s =8 TeV with the ATLAS detector",
abstract = "A search for pair production of vector-like quarks, both up-type (T) and down-type (B), as well as for four-top-quark production, is presented. The search is based on pp collisions at TeV recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider and corresponding to an integrated luminosity of 20.3 fb(-1). Data are analysed in the lepton-plus-jets final state, characterised by an isolated electron or muon with high transverse momentum, large missing transverse momentum and multiple jets. Dedicated analyses are performed targeting three cases: a T quark with significant branching ratio to a W boson and a b-quark , and both a T quark and a B quark with significant branching ratio to a Higgs boson and a third-generation quark ( respectively). No significant excess of events above the Standard Model expectation is observed, and 95% CL lower limits are derived on the masses of the vector-like T and B quarks under several branching ratio hypotheses assuming contributions from T -> Wb, Zt, Ht and B -> Wt, Zb, Hb decays. The 95% CL observed lower limits on the T quark mass range between 715 GeV and 950 GeV for all possible values of the branching ratios into the three decay modes, and are the most stringent constraints to date. Additionally, the most restrictive upper bounds on four-top-quark production are set in a number of new physics scenarios. ",
author = "Adam Barton and Michael Beattie and Guennadi Borissov and Bouhova-Thacker, {Evelina Vassileva} and William Dearnaley and Harald Fox and Grimm, {Kathryn Ann Tschann} and Henderson, {Robert Charles William} and Gareth Hughes and Jones, {Roger William Lewis} and Vakhtang Kartvelishvili and Long, {Robin Eamonn} and Love, {Peter Allan} and Harvey Maddocks and Malcolm Skinner and Maria Smizanska and Walder, {James William} and Andy Wharton and {The ATLAS collaboration}",
year = "2015",
month = aug,
doi = "10.1007/JHEP08(2015)105",
language = "English",
journal = "Journal of High Energy Physics",
issn = "1029-8479",
publisher = "Springer-Verlag",
number = "8",

}

RIS

TY - JOUR

T1 - Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at √ s =8 TeV with the ATLAS detector

AU - Barton, Adam

AU - Beattie, Michael

AU - Borissov, Guennadi

AU - Bouhova-Thacker, Evelina Vassileva

AU - Dearnaley, William

AU - Fox, Harald

AU - Grimm, Kathryn Ann Tschann

AU - Henderson, Robert Charles William

AU - Hughes, Gareth

AU - Jones, Roger William Lewis

AU - Kartvelishvili, Vakhtang

AU - Long, Robin Eamonn

AU - Love, Peter Allan

AU - Maddocks, Harvey

AU - Skinner, Malcolm

AU - Smizanska, Maria

AU - Walder, James William

AU - Wharton, Andy

AU - The ATLAS collaboration

PY - 2015/8

Y1 - 2015/8

N2 - A search for pair production of vector-like quarks, both up-type (T) and down-type (B), as well as for four-top-quark production, is presented. The search is based on pp collisions at TeV recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider and corresponding to an integrated luminosity of 20.3 fb(-1). Data are analysed in the lepton-plus-jets final state, characterised by an isolated electron or muon with high transverse momentum, large missing transverse momentum and multiple jets. Dedicated analyses are performed targeting three cases: a T quark with significant branching ratio to a W boson and a b-quark , and both a T quark and a B quark with significant branching ratio to a Higgs boson and a third-generation quark ( respectively). No significant excess of events above the Standard Model expectation is observed, and 95% CL lower limits are derived on the masses of the vector-like T and B quarks under several branching ratio hypotheses assuming contributions from T -> Wb, Zt, Ht and B -> Wt, Zb, Hb decays. The 95% CL observed lower limits on the T quark mass range between 715 GeV and 950 GeV for all possible values of the branching ratios into the three decay modes, and are the most stringent constraints to date. Additionally, the most restrictive upper bounds on four-top-quark production are set in a number of new physics scenarios.

AB - A search for pair production of vector-like quarks, both up-type (T) and down-type (B), as well as for four-top-quark production, is presented. The search is based on pp collisions at TeV recorded in 2012 with the ATLAS detector at the CERN Large Hadron Collider and corresponding to an integrated luminosity of 20.3 fb(-1). Data are analysed in the lepton-plus-jets final state, characterised by an isolated electron or muon with high transverse momentum, large missing transverse momentum and multiple jets. Dedicated analyses are performed targeting three cases: a T quark with significant branching ratio to a W boson and a b-quark , and both a T quark and a B quark with significant branching ratio to a Higgs boson and a third-generation quark ( respectively). No significant excess of events above the Standard Model expectation is observed, and 95% CL lower limits are derived on the masses of the vector-like T and B quarks under several branching ratio hypotheses assuming contributions from T -> Wb, Zt, Ht and B -> Wt, Zb, Hb decays. The 95% CL observed lower limits on the T quark mass range between 715 GeV and 950 GeV for all possible values of the branching ratios into the three decay modes, and are the most stringent constraints to date. Additionally, the most restrictive upper bounds on four-top-quark production are set in a number of new physics scenarios.

U2 - 10.1007/JHEP08(2015)105

DO - 10.1007/JHEP08(2015)105

M3 - Journal article

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 8

M1 - 105

ER -