Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton-proton collisions at root s=13 TeV with the ATLAS detector

M. Aaboud; G. Aad; B. Abbott; O. Abdinov; B Abeloos; S.H. Abidi; Ossama Sherif Alexander Abouzeid; NL Abraham; H. Abramowicz; H. Abreu; R. Abreu; B.S. Acharya; Sosuke Adachi; L. Adamczyk; D Adelmann; M. Adersberger; A. Adiguzel; T. Adye; Milena Bajic; Alejandro Alonso Diaz; Mogens Dam; Flavia de Almeida Dias; Geert-Jan Besjes; Peter Henrik Hansen; Jørgen Beck Hansen; Jørn Dines Hansen; Gorm Aske Gram Krohn Galster; Fabian Alexander Jürgen Thiele; Graig Wiglesworth; Troels Christian Petersen; Stefania Xella; James William Monk; Simon Holm Stark

doi:10.1140/epjc/s10052-018-5995-6

Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton-proton collisions at root s=13 TeV with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, O. Abdinov, B Abeloos, S.H. Abidi, Ossama Sherif Alexander Abouzeid, NL Abraham, H. Abramowicz, H. Abreu, R. Abreu, B.S. Acharya, Sosuke Adachi, L. Adamczyk, D Adelmann, M. Adersberger, A. Adiguzel, T. Adye, Milena Bajic, Alejandro Alonso DiazMogens Dam, Flavia de Almeida Dias, Geert-Jan Besjes, Peter Henrik Hansen, Jørgen Beck Hansen, Jørn Dines Hansen, Gorm Aske Gram Krohn Galster, Fabian Alexander Jürgen Thiele, Graig Wiglesworth, Troels Christian Petersen, Stefania Xella, James William Monk, Simon Holm Stark

Experimental Particle Physics

66 Citations (Scopus)

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Abstract

A search for new heavy particles that decay into top-quark pairs is performed using data collected from proton–proton collisions at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The integrated luminosity of the data sample is 36.1 fb^{- 1}. Events consistent with top-quark pair production are selected by requiring a single isolated charged lepton, missing transverse momentum and jet activity compatible with a hadronic top-quark decay. Jets identified as likely to contain b-hadrons are required to reduce the background from other Standard Model processes. The invariant mass spectrum of the candidate top-quark pairs is examined for local excesses above the background expectation. No significant deviations from the Standard Model predictions are found. Exclusion limits are set on the production cross-section times branching ratio for hypothetical Z^′ bosons, Kaluza–Kein gluons and Kaluza–Klein gravitons that decay into top-quark pairs.

Original language	English
Article number	565
Journal	European Physical Journal C
Volume	78
Issue number	7
Number of pages	39
ISSN	1434-6044
DOIs	https://doi.org/10.1140/epjc/s10052-018-5995-6
Publication status	Published - 1 Jul 2018

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Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abidi, S. H., Abouzeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abreu, R., Acharya, B. S., Adachi, S., Adamczyk, L., Adelmann, D., Adersberger, M., Adiguzel, A., Adye, T., Bajic, M., ... Stark, S. H. (2018). Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton-proton collisions at root s=13 TeV with the ATLAS detector. European Physical Journal C, 78(7), [565]. https://doi.org/10.1140/epjc/s10052-018-5995-6

Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abidi, SH, Abouzeid, OSA, Abraham, NL, Abramowicz, H, Abreu, H, Abreu, R, Acharya, BS, Adachi, S, Adamczyk, L, Adelmann, D, Adersberger, M, Adiguzel, A, Adye, T, Bajic, M, Alonso Diaz, A, Dam, M, de Almeida Dias, F, Besjes, G-J, Hansen, PH , Hansen, JB , Hansen, JD, Galster, GAGK, Thiele, FAJ, Wiglesworth, G , Petersen, TC , Xella, S, Monk, JW & Stark, SH 2018, 'Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton-proton collisions at root s=13 TeV with the ATLAS detector', European Physical Journal C, vol. 78, no. 7, 565. https://doi.org/10.1140/epjc/s10052-018-5995-6

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title = "Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton-proton collisions at root s=13 TeV with the ATLAS detector",

abstract = "A search for new heavy particles that decay into top-quark pairs is performed using data collected from proton–proton collisions at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The integrated luminosity of the data sample is 36.1 fb- 1. Events consistent with top-quark pair production are selected by requiring a single isolated charged lepton, missing transverse momentum and jet activity compatible with a hadronic top-quark decay. Jets identified as likely to contain b-hadrons are required to reduce the background from other Standard Model processes. The invariant mass spectrum of the candidate top-quark pairs is examined for local excesses above the background expectation. No significant deviations from the Standard Model predictions are found. Exclusion limits are set on the production cross-section times branching ratio for hypothetical Z′ bosons, Kaluza–Kein gluons and Kaluza–Klein gravitons that decay into top-quark pairs.",

author = "M. Aaboud and G. Aad and B. Abbott and O. Abdinov and B Abeloos and S.H. Abidi and Abouzeid, {Ossama Sherif Alexander} and NL Abraham and H. Abramowicz and H. Abreu and R. Abreu and B.S. Acharya and Sosuke Adachi and L. Adamczyk and D Adelmann and M. Adersberger and A. Adiguzel and T. Adye and Milena Bajic and {Alonso Diaz}, Alejandro and Mogens Dam and {de Almeida Dias}, Flavia and Geert-Jan Besjes and Hansen, {Peter Henrik} and Hansen, {J{\o}rgen Beck} and Hansen, {J{\o}rn Dines} and Galster, {Gorm Aske Gram Krohn} and Thiele, {Fabian Alexander J{\"u}rgen} and Graig Wiglesworth and Petersen, {Troels Christian} and Stefania Xella and Monk, {James William} and Stark, {Simon Holm}",

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AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdinov, O.

AU - Abeloos, B

AU - Abidi, S.H.

AU - Abouzeid, Ossama Sherif Alexander

AU - Abraham, NL

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abreu, R.

AU - Acharya, B.S.

AU - Adachi, Sosuke

AU - Adamczyk, L.

AU - Adelmann, D

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adye, T.

AU - Bajic, Milena

AU - Alonso Diaz, Alejandro

AU - Dam, Mogens

AU - de Almeida Dias, Flavia

AU - Besjes, Geert-Jan

AU - Hansen, Peter Henrik

AU - Hansen, Jørgen Beck

AU - Hansen, Jørn Dines

AU - Galster, Gorm Aske Gram Krohn

AU - Thiele, Fabian Alexander Jürgen

AU - Wiglesworth, Graig

AU - Petersen, Troels Christian

AU - Xella, Stefania

AU - Monk, James William

AU - Stark, Simon Holm

PY - 2018/7/1

Y1 - 2018/7/1

N2 - A search for new heavy particles that decay into top-quark pairs is performed using data collected from proton–proton collisions at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The integrated luminosity of the data sample is 36.1 fb- 1. Events consistent with top-quark pair production are selected by requiring a single isolated charged lepton, missing transverse momentum and jet activity compatible with a hadronic top-quark decay. Jets identified as likely to contain b-hadrons are required to reduce the background from other Standard Model processes. The invariant mass spectrum of the candidate top-quark pairs is examined for local excesses above the background expectation. No significant deviations from the Standard Model predictions are found. Exclusion limits are set on the production cross-section times branching ratio for hypothetical Z′ bosons, Kaluza–Kein gluons and Kaluza–Klein gravitons that decay into top-quark pairs.

AB - A search for new heavy particles that decay into top-quark pairs is performed using data collected from proton–proton collisions at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. The integrated luminosity of the data sample is 36.1 fb- 1. Events consistent with top-quark pair production are selected by requiring a single isolated charged lepton, missing transverse momentum and jet activity compatible with a hadronic top-quark decay. Jets identified as likely to contain b-hadrons are required to reduce the background from other Standard Model processes. The invariant mass spectrum of the candidate top-quark pairs is examined for local excesses above the background expectation. No significant deviations from the Standard Model predictions are found. Exclusion limits are set on the production cross-section times branching ratio for hypothetical Z′ bosons, Kaluza–Kein gluons and Kaluza–Klein gravitons that decay into top-quark pairs.

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DO - 10.1140/epjc/s10052-018-5995-6

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SN - 1434-6044

VL - 78

JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

IS - 7

M1 - 565

ER -

Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton-proton collisions at root s=13 TeV with the ATLAS detector

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