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Title: Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel

Abstract

A measurement of the production cross-section for top quark pairs ($$t\bar{t}$$) in pp collisions at $$\sqrt{s} = 7TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in the single lepton topology by requiring an electron or muon, large missing transverse momentum and at least three jets. With a data sample of 35 pb -1, two different multivariate methods, one of which uses b-quark jet identification while the other does not, use kinematic variables to obtain cross-section measurements of σ $$t\bar{t}$ = 187±11 (stat.) $$+18\atop{-17}$$ (syst.) ± 6 (lumi.) pb and σ $$t\bar{t}$$ =173 ± 17 (stat.) $$+18\atop{-16}$$ (syst.) ± 6 (lumi.) pb respectively. In conclusion, the two measurements are in agreement with each other and with QCD calculations. The first measurement has a better a priori sensitivity and constitutes the main result of this Letter.

Authors:
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Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1046428
Report Number(s):
BNL-98249-2012-JA
KA1101021; TRN: US1203759
DOE Contract Number:  
AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Volume: 711; Journal Issue: 3-4
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRONS; HADRONS; LEPTONS; PAIR PRODUCTION; PHYSICS; PRODUCTION; QUANTUM CHROMODYNAMICS; SENSITIVITY; T QUARKS; TOPOLOGY; TRANSVERSE MOMENTUM

Citation Formats

Aad, G, Abbott, B, Abdallah, J, Abdelalim, AA, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Acharya, BS, Adams, DL, Addy, TN, Adelman, J, Aderholz, M, Adomeit, S, Adragna, R, Adye, T, Aefsky, S, Aguilar-Saavedra, JA, and et al. Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel. United States: N. p., 2012. Web. doi:10.1016/j.physletb.2012.03.083.
Aad, G, Abbott, B, Abdallah, J, Abdelalim, AA, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Acharya, BS, Adams, DL, Addy, TN, Adelman, J, Aderholz, M, Adomeit, S, Adragna, R, Adye, T, Aefsky, S, Aguilar-Saavedra, JA, & et al. Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel. United States. doi:10.1016/j.physletb.2012.03.083.
Aad, G, Abbott, B, Abdallah, J, Abdelalim, AA, Abdesselam, A, Abdinov, O, Abi, B, Abolins, M, Abramowicz, H, Abreu, H, Acerbi, E, Acharya, BS, Adams, DL, Addy, TN, Adelman, J, Aderholz, M, Adomeit, S, Adragna, R, Adye, T, Aefsky, S, Aguilar-Saavedra, JA, and et al. Tue . "Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel". United States. doi:10.1016/j.physletb.2012.03.083.
@article{osti_1046428,
title = {Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel},
author = {Aad, G and Abbott, B and Abdallah, J and Abdelalim, AA and Abdesselam, A and Abdinov, O and Abi, B and Abolins, M and Abramowicz, H and Abreu, H and Acerbi, E and Acharya, BS and Adams, DL and Addy, TN and Adelman, J and Aderholz, M and Adomeit, S and Adragna, R and Adye, T and Aefsky, S and Aguilar-Saavedra, JA and et al.},
abstractNote = {A measurement of the production cross-section for top quark pairs ($t\bar{t}$) in pp collisions at $\sqrt{s} = 7TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in the single lepton topology by requiring an electron or muon, large missing transverse momentum and at least three jets. With a data sample of 35 pb-1, two different multivariate methods, one of which uses b-quark jet identification while the other does not, use kinematic variables to obtain cross-section measurements of σ$t\bar{t}$ = 187±11 (stat.) $+18\atop{-17}$ (syst.) ± 6 (lumi.) pb and σ$t\bar{t}$ =173 ± 17 (stat.) $+18\atop{-16}$ (syst.) ± 6 (lumi.) pb respectively. In conclusion, the two measurements are in agreement with each other and with QCD calculations. The first measurement has a better a priori sensitivity and constitutes the main result of this Letter.},
doi = {10.1016/j.physletb.2012.03.083},
journal = {Physics Letters B},
number = 3-4,
volume = 711,
place = {United States},
year = {2012},
month = {5}
}

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