- Main
Measurement of the top quark-pair production cross section with ATLAS in pp collisions at √s = 7 TeV
- Author(s): Aad, G;
- Abbott, B;
- Abdallah, J;
- Abdelalim, AA;
- Abdesselam, A;
- Abdinov, O;
- Abi, B;
- Abolins, M;
- Abramowicz, H;
- Abreu, H;
- Acerbi, E;
- Acharya, BS;
- Ackers, M;
- Adams, DL;
- Addy, TN;
- Adelman, J;
- Aderholz, M;
- Adomeit, S;
- Adragna, P;
- Adye, T;
- Aefsky, S;
- Aguilar-Saavedra, JA;
- Aharrouche, M;
- Ahlen, SP;
- Ahles, F;
- Ahmad, A;
- Ahmed, H;
- Ahsan, M;
- Aielli, G;
- Akdogan, T;
- Åkesson, TPA;
- Akimoto, G;
- Akimov, AV;
- Alam, MS;
- Alam, MA;
- Albrand, S;
- Aleksa, M;
- Aleksandrov, IN;
- Aleppo, M;
- Alessandria, F;
- Alexa, C;
- Alexander, G;
- Alexandre, G;
- Alexopoulos, T;
- Alhroob, M;
- Aliev, M;
- Alimonti, G;
- Alison, J;
- Aliyev, M;
- Allport, PP;
- Allwood-Spiers, SE;
- Almond, J;
- Aloisio, A;
- Alon, R;
- Alonso, A;
- Alonso, J;
- Alviggi, MG;
- Amako, K;
- Amaral, P;
- Amelung, C;
- Ammosov, VV;
- Amorim, A;
- Amorós, G;
- Amram, N;
- Anastopoulos, C;
- Andeen, T;
- Anders, CF;
- Anderson, KJ;
- Andreazza, A;
- Andrei, V;
- Andrieux, ML;
- Anduaga, XS;
- Angerami, A;
- Anghinolfi, F;
- Anjos, N;
- Annovi, A;
- Antonaki, A;
- Antonelli, M;
- Antonelli, S;
- Antos, J;
- Antunovic, B;
- Anulli, F;
- Aoun, S;
- Bella, LA;
- Apolle, R;
- Arabidze, G;
- Aracena, I;
- Arai, Y;
- Arce, ATH;
- Archambault, JP;
- Arfaoui, S;
- Arguin, JF;
- Arik, E;
- Arik, M;
- Armbruster, AJ;
- Arms, KE;
- Armstrong, SR;
- Arnaez, O;
- Arnault, C;
- Artamonov, A
- et al.
Abstract
A measurement of the production cross-section for top quark pairs (tt̅) in pp collisions at √s =7 TeVis presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in two different topologies: single lepton (electron e or muon μ) with large missing transverse energy and at least four jets, and dilepton (ee, μμ or eμ) with large missing transverse energy and at least two jets. In a data sample of 2.9 pb–1, 37 candidate events are observed in the single-lepton topology and 9 events in the dilepton topology. The corresponding expected backgrounds from non-tt̅ Standard Model processes are estimated using data-driven methods and determined to be 12.2 ± 3.9 events and 2.5± 0.6 events, respectively. The kinematic properties of the selected events are consistent with SM tt̅ production. The inclusive top quark pair production cross-section is measured to be The measurement agrees with perturbative QCD calculations.
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