A search for tt resonances with the ATLAS detector in 2.05 fb −1 of proton-proton collisions at √ s =7 TeV

The ATLAS Collaboration

doi:10.1140/epjc/s10052-012-2083-1

A search for tt resonances with the ATLAS detector in 2.05 fb ⁻¹ of proton-proton collisions at √ s =7 TeV

The ATLAS Collaboration

European Organization for Nuclear Research
University of Freiburg
University of Oklahoma
The Barcelona Institute of Science and Technology
Laboratoire de l'Accélérateur Linéaire
Section de Physique
University of Geneva
Azerbaijan Academy of Sciences
Oklahoma State University
Department of Physics and Astronomy
Michigan State University
University of Toronto
Tel Aviv University
Universite Paris-Saclay
Sezione INFN di Milano
University of Milano
Sezione di Roma
Abdus Salam International Centre for Theoretical Physics
Agh University of Science and Technology Faculty of Computer Science
Brookhaven National Laboratory Physics Department
Department of Physics
Hampton University
Yale University
Universität München
School of Physics and Astronomy
Queen Mary University of London
Rutherford Appleton Laboratory
Department of Physics
Brandeis University
Lisboa
Departamento de Fisica Teorica y del Cosmos and CAFPE
University of Granada
University of Bern
Johannes Gutenberg University
Boston University
Departments of Physics & Astronomy and Chemistry
Stony Brook University
Physics Department
University of Texas
INFN Roma Tor Vergata
University of Rome “Tor Vergata”
Department of Physics
Bogazici University
Department of Physics
Lund University
International Center for Elementary Particle Physics and Department of Physics
University of Tokyo
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
State University of New York Albany
Department of Physics
Royal Holloway University of London
Department of Physics and Astronomy
University of Victoria
Laboratoire de Physique Subatomique et de Cosmologie de Grenoble
Joint Institute for Nuclear Research, Dubna
Horia Hulubei National Institute of Physics and Nuclear Engineering
Physics Department
National Technical University of Athens
Dipartimento di Chimica
and Physics University of Udine
Department of Physics
Humboldt-Universität zu Berlin
University of Pennsylvania School of Arts and Sciences

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

24 Citations (Scopus)

Résumé

A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb⁻¹, which was recorded in 2011 at a proton-proton centre-of-mass energy of 7 TeV. No evidence for a resonance is found and limits are set on the production cross-section times branching ratio to tt for narrow and wide resonances. For narrow Z′ bosons, the observed 95 % Bayesian credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of m_Z′ = 500 GeV to m_{Z ′}= 1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z′ boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is m_Z < 880 GeV (m_gKK < 1130 GeV).

langue originale	Anglais
Numéro d'article	2083
journal	European Physical Journal C
Volume	72
Numéro de publication	7
Les DOIs	https://doi.org/10.1140/epjc/s10052-012-2083-1
état	Publié - 26 juil. 2012
Modification externe	Oui

Accès au document

10.1140/epjc/s10052-012-2083-1

Contient cette citation

@article{74389fb7e9b544e5af502f850febe8d7,

title = "A search for tt resonances with the ATLAS detector in 2.05 fb −1 of proton-proton collisions at √ s =7 TeV",

abstract = "A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb−1, which was recorded in 2011 at a proton-proton centre-of-mass energy of 7 TeV. No evidence for a resonance is found and limits are set on the production cross-section times branching ratio to tt for narrow and wide resonances. For narrow Z′ bosons, the observed 95 \% Bayesian credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of mZ′ = 500 GeV to mZ ′= 1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z′ boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is mZ < 880 GeV (mgKK < 1130 GeV).",

author = "\{The ATLAS Collaboration\} and G. Aad and B. Abbott and J. Abdallah and Khalek, \{S. Abdel\} and Abdelalim, \{A. A.\} and O. Abdinov and B. Abi and M. Abolins and Zeid, \{O. S.Abou\} and H. Abramowicz and H. Abreu and E. Acerbi and Acharya, \{B. S.\} and L. Adamczyk and Adams, \{D. L.\} and Addy, \{T. N.\} and J. Adelman and S. Adomeit and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, \{J. A.\} and M. Agustoni and M. Aharrouche and Ahlen, \{S. P.\} and F. Ahles and A. Ahmad and M. Ahsan and G. Aielli and T. Akdogan and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and Alam, \{M. S.\} and Alam, \{M. A.\} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, \{I. N.\} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and M. Aliev and G. Alimonti and J. Alison and \{De La Taille\}, C. and O. Simard",

note = "Publisher Copyright: {\textcopyright} CERN for the benefit of the ATLAS collaboration 2012.",

year = "2012",

month = jul,

day = "26",

doi = "10.1140/epjc/s10052-012-2083-1",

language = "English",

volume = "72",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "7",

}

TY - JOUR

T1 - A search for tt resonances with the ATLAS detector in 2.05 fb −1 of proton-proton collisions at √ s =7 TeV

AU - The ATLAS Collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Khalek, S. Abdel

AU - Abdelalim, A. A.

AU - Abdinov, O.

AU - Abi, B.

AU - Abolins, M.

AU - Zeid, O. S.Abou

AU - Abramowicz, H.

AU - Abreu, H.

AU - Acerbi, E.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Adomeit, S.

AU - Adragna, P.

AU - Adye, T.

AU - Aefsky, S.

AU - Aguilar-Saavedra, J. A.

AU - Agustoni, M.

AU - Aharrouche, M.

AU - Ahlen, S. P.

AU - Ahles, F.

AU - Ahmad, A.

AU - Ahsan, M.

AU - Aielli, G.

AU - Akdogan, T.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Alam, M. S.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Aliev, M.

AU - Alimonti, G.

AU - Alison, J.

AU - De La Taille, C.

AU - Simard, O.

PY - 2012/7/26

Y1 - 2012/7/26

N2 - A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb−1, which was recorded in 2011 at a proton-proton centre-of-mass energy of 7 TeV. No evidence for a resonance is found and limits are set on the production cross-section times branching ratio to tt for narrow and wide resonances. For narrow Z′ bosons, the observed 95 % Bayesian credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of mZ′ = 500 GeV to mZ ′= 1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z′ boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is mZ < 880 GeV (mgKK < 1130 GeV).

AB - A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb−1, which was recorded in 2011 at a proton-proton centre-of-mass energy of 7 TeV. No evidence for a resonance is found and limits are set on the production cross-section times branching ratio to tt for narrow and wide resonances. For narrow Z′ bosons, the observed 95 % Bayesian credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of mZ′ = 500 GeV to mZ ′= 1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z′ boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is mZ < 880 GeV (mgKK < 1130 GeV).

U2 - 10.1140/epjc/s10052-012-2083-1

DO - 10.1140/epjc/s10052-012-2083-1

M3 - Article

AN - SCOPUS:84865462061

SN - 1434-6044

VL - 72

JO - European Physical Journal C

JF - European Physical Journal C

IS - 7

M1 - 2083

ER -

A search for tt resonances with the ATLAS detector in 2.05 fb −1 of proton-proton collisions at √ s =7 TeV

Résumé

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Contient cette citation

A search for tt resonances with the ATLAS detector in 2.05 fb ⁻¹ of proton-proton collisions at √ s =7 TeV