Scholars@Duke

Search for tt̄ resonances in the lepton plus jets final state with ATLAS using 4.7 fb–1of pp collisions at √s = 7 TeV

Publication ,  Journal Article
Aad, G; Abajyan, T; Abbott, B; Abdallah, J; Abdel Khalek, S; Abdelalim, AA; Abdinov, O; Aben, R; Abi, B; Abolins, M; Abouzeid, OS; Abreu, H ...
Published in: Physical Review D - Particles, Fields, Gravitation and Cosmology
January 1, 2013
Published version (DOI)

A search for new particles that decay into top quark pairs (tt) is performed with the ATLAS experiment at the LHC using an integrated luminosity of 4.7 fb–1of proton–proton (pp) collision data collected at a center-of-mass energy √s = 7 TeV. In the tt̄→ WbWb decay, the lepton plus jets final state is used, where one W boson decays leptonically and the other hadronically. The tt̄system is reconstructed using both small-radius and large-radius jets, the latter being supplemented by a jet substructure analysis. A search for local excesses in the number of data events compared to the Standard Model expectation in the tt̄invariant mass spectrum is performed. No evidence for a tt̄resonance is found and 95% credibility-level limits on the production rate are determined for massive states predicted in two benchmark models. The upper limits on the cross section times branching ratio of a narrow Z′ resonance range from 5.1 pb for a boson mass of 0.5 TeV to 0.03 pb for a mass of 3 TeV. A narrow leptophobic topcolor Z′ resonance with a mass below 1.74 TeV is excluded. Limits are also derived for a broad color-octet resonance with Γ/m = 15.3%. A Kaluza–Klein excitation of the gluon in a Randall–Sundrum model is excluded for masses below 2.07 TeV.

Duke Scholars

Alfred T. Goshaw
Author Alfred T. Goshaw Physics
Mark C. Kruse
Author Mark C. Kruse Physics
Ayana T. Arce
Author Ayana T. Arce Physics
Ashutosh V. Kotwal
Author Ashutosh V. Kotwal Physics
Seog Oh
Author Seog Oh Physics
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Published In

Physical Review D - Particles, Fields, Gravitation and Cosmology

DOI

10.1103/PhysRevD.88.012004

EISSN

1550-2368

ISSN

1550-7998

Publication Date

January 1, 2013

Volume

88

Issue

1

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

Citation

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MLA
NLM
Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdelalim, A. A., … Arik, M. (2013). Search for tt̄ resonances in the lepton plus jets final state with ATLAS using 4.7 fb–1of pp collisions at √s = 7 TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology, 88(1). https://doi.org/10.1103/PhysRevD.88.012004
Aad, G., T. Abajyan, B. Abbott, J. Abdallah, S. Abdel Khalek, A. A. Abdelalim, O. Abdinov, et al. “Search for tt̄ resonances in the lepton plus jets final state with ATLAS using 4.7 fb–1of pp collisions at √s = 7 TeV.” Physical Review D - Particles, Fields, Gravitation and Cosmology 88, no. 1 (January 1, 2013). https://doi.org/10.1103/PhysRevD.88.012004.
Aad G, Abajyan T, Abbott B, Abdallah J, Abdel Khalek S, Abdelalim AA, et al. Search for tt̄ resonances in the lepton plus jets final state with ATLAS using 4.7 fb–1of pp collisions at √s = 7 TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2013 Jan 1;88(1).
Aad, G., et al. “Search for tt̄ resonances in the lepton plus jets final state with ATLAS using 4.7 fb–1of pp collisions at √s = 7 TeV.” Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 88, no. 1, Jan. 2013. Scopus, doi:10.1103/PhysRevD.88.012004.
Aad G, Abajyan T, Abbott B, Abdallah J, Abdel Khalek S, Abdelalim AA, Abdinov O, Aben R, Abi B, Abolins M, Abouzeid OS, Abramowicz H, Abreu H, Acharya BS, Adamczyk L, Adams DL, Addy TN, Adelman J, Adomeit S, Adragna P, Adye T, Aefsky S, Aguilar-Saavedra JA, Agustoni M, Aharrouche M, Ahlen SP, Ahles F, Ahmad A, Ahsan M, Aielli G, Akdogan T, Åkesson TPA, Akimoto G, Akimov AV, Alam MS, Alam MA, Albert J, Albrand S, Aleksa M, Aleksandrov IN, Alessandria F, Alexa C, Alexander G, Alexandre G, Alexopoulos T, Alhroob M, Aliev M, Alimonti G, Alison J, Allbrooke BMM, Allport PP, Allwood-Spiers SE, Almond J, Aloisio A, Alon R, Alonso A, Alonso F, Altheimer A, Alvarez Gonzalez B, Alviggi MG, Amako K, Amelung C, Ammosov VV, Amor Dos Santos SP, Amorim A, Amram N, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders G, Anderson KJ, Andreazza A, Andrei V, Andrieux ML, Anduaga XS, Anger P, Angerami A, Anghinolfi F, Anisenkov A, Anjos N, Annovi A, Antonaki A, Antonelli M, Antonov A, Antos J, Anulli F, Aoki M, Aoun S, Aperio Bella L, Apolle R, Arabidze G, Aracena I, Arai Y, Arce ATH, Arfaoui S, Arguin JF, Arik E, Arik M. Search for tt̄ resonances in the lepton plus jets final state with ATLAS using 4.7 fb–1of pp collisions at √s = 7 TeV. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2013 Jan 1;88(1).

Published In

Physical Review D - Particles, Fields, Gravitation and Cosmology

DOI

10.1103/PhysRevD.88.012004

EISSN

1550-2368

ISSN

1550-7998

Publication Date

January 1, 2013

Volume

88

Issue

1

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences