Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector

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

doi:10.1016/j.physletb.2012.03.082

Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector

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

31 Citationer (Scopus)

Abstract

This Letter presents a search for singly produced vector-like quarks, Q, coupling to light quarks, q. The search is sensitive to both charged current (CC) and neutral current (NC) processes, pp?Qq?Wqq ^' and pp?Qq?Zqq ^' with a leptonic decay of the vector gauge boson. In 1.04fb ^-1 of data taken in 2011 by the ATLAS experiment at a center-of-mass energy vs=7 TeV, no evidence of such heavy vector-like quarks is observed above the expected Standard Model background. Limits on the heavy vector-like quark production cross section times branching ratio as a function of mass m _Q are obtained. For a coupling ?qQ=v/mQ, where v is the Higgs vacuum expectation value, 95% C.L. lower limits on the mass of a vector-like quark are set at 900 GeV and 760 GeV from CC and NC processes, respectively.

Originalsprog	Engelsk
Tidsskrift	Physics Letters B
Vol/bind	712
Udgave nummer	1-2
Sider (fra-til)	22-39
ISSN	0370-2693
DOI	https://doi.org/10.1016/j.physletb.2012.03.082
Status	Udgivet - 30 maj 2012

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10.1016/j.physletb.2012.03.082

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Aad, G., Dam, M., Boelaert, N. M. P., Hansen, J. B., Hansen, J. R., Hansen, P. H., Hansen, J. D., Heisterkamp, S. J. F., Jørgensen, M. D., Mehlhase, S., Klinkby, E. B., Nilsson, B. S., Petersen, T. C., Løvschall-Jensen, A. E., & Xella, S. (2012). Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector. Physics Letters B, 712(1-2), 22-39. https://doi.org/10.1016/j.physletb.2012.03.082

Aad, G, Dam, M, Boelaert, NMP, Hansen, JB , Hansen, JR , Hansen, PH , Hansen, JD, Heisterkamp, SJF, Jørgensen, MD, Mehlhase, S, Klinkby, EB, Nilsson, BS, Petersen, TC, Løvschall-Jensen, AE & Xella, S 2012, 'Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector', Physics Letters B, bind 712, nr. 1-2, s. 22-39. https://doi.org/10.1016/j.physletb.2012.03.082

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title = "Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector",

abstract = " This Letter presents a search for singly produced vector-like quarks, Q, coupling to light quarks, q. The search is sensitive to both charged current (CC) and neutral current (NC) processes, pp?Qq?Wqq ' and pp?Qq?Zqq ' with a leptonic decay of the vector gauge boson. In 1.04fb -1 of data taken in 2011 by the ATLAS experiment at a center-of-mass energy vs=7 TeV, no evidence of such heavy vector-like quarks is observed above the expected Standard Model background. Limits on the heavy vector-like quark production cross section times branching ratio as a function of mass m Q are obtained. For a coupling ?qQ=v/mQ, where v is the Higgs vacuum expectation value, 95% C.L. lower limits on the mass of a vector-like quark are set at 900 GeV and 760 GeV from CC and NC processes, respectively.",

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

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T1 - Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector

AU - Aad, G.

AU - Dam, Mogens

AU - Boelaert, Nele Maria Philomena

AU - Hansen, Jørgen Beck

AU - Hansen, John Renner

AU - Hansen, Peter Henrik

AU - Hansen, Jørn Dines

AU - Heisterkamp, Simon Johann Franz

AU - Jørgensen, Morten Dam

AU - Mehlhase, Sascha

AU - Klinkby, Esben Bryndt

AU - Nilsson, Björn Stefan

AU - Petersen, Troels Christian

AU - Løvschall-Jensen, Ask Emil

AU - Xella, Stefania

PY - 2012/5/30

Y1 - 2012/5/30

N2 - This Letter presents a search for singly produced vector-like quarks, Q, coupling to light quarks, q. The search is sensitive to both charged current (CC) and neutral current (NC) processes, pp?Qq?Wqq ' and pp?Qq?Zqq ' with a leptonic decay of the vector gauge boson. In 1.04fb -1 of data taken in 2011 by the ATLAS experiment at a center-of-mass energy vs=7 TeV, no evidence of such heavy vector-like quarks is observed above the expected Standard Model background. Limits on the heavy vector-like quark production cross section times branching ratio as a function of mass m Q are obtained. For a coupling ?qQ=v/mQ, where v is the Higgs vacuum expectation value, 95% C.L. lower limits on the mass of a vector-like quark are set at 900 GeV and 760 GeV from CC and NC processes, respectively.

AB - This Letter presents a search for singly produced vector-like quarks, Q, coupling to light quarks, q. The search is sensitive to both charged current (CC) and neutral current (NC) processes, pp?Qq?Wqq ' and pp?Qq?Zqq ' with a leptonic decay of the vector gauge boson. In 1.04fb -1 of data taken in 2011 by the ATLAS experiment at a center-of-mass energy vs=7 TeV, no evidence of such heavy vector-like quarks is observed above the expected Standard Model background. Limits on the heavy vector-like quark production cross section times branching ratio as a function of mass m Q are obtained. For a coupling ?qQ=v/mQ, where v is the Higgs vacuum expectation value, 95% C.L. lower limits on the mass of a vector-like quark are set at 900 GeV and 760 GeV from CC and NC processes, respectively.

U2 - 10.1016/j.physletb.2012.03.082

DO - 10.1016/j.physletb.2012.03.082

M3 - Journal article

SN - 0370-2693

VL - 712

SP - 22

EP - 39

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

Search for heavy vector-like quarks coupling to light quarks in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector

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