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Measurement of the top quark pair production cross section in pp collisions at root s=7 TeV in dilepton final states with ATLAS

Aad, G ; Abbott, B ; Abdallah, J ; Abdelalim, A A ; Abdesselam, A ; Abdinov, O ; Abi, B ; Abolins, M ; Abramowicz, H ; Abreu, H ; Acerbi, E ; Acharya, B S ; Adams, D L ; Addy, T N ; Adelman, J ; Aderholz, M ; Adomeit, S ; Adragna, P ; Adye, T ; Aefsky

Physics letters. B, 2012-02, Vol.707 (5), p.459 [Periódico revisado por pares]

United States

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Título:
Measurement of the top quark pair production cross section in pp collisions at root s=7 TeV in dilepton final states with ATLAS
Autor: Aad, G ; Abbott, B ; Abdallah, J ; Abdelalim, A A ; Abdesselam, A ; Abdinov, O ; Abi, B ; Abolins, M ; Abramowicz, H ; Abreu, H ; Acerbi, E ; Acharya, B S ; Adams, D L ; Addy, T N ; Adelman, J ; Aderholz, M ; Adomeit, S ; Adragna, P ; Adye, T ; Aefsky
Assuntos: B QUARKS ; CROSS SECTIONS ; HADRONS ; Heavy quark production ; LUMINOSITY ; NUCLEAR PHYSICS AND RADIATION PHYSICS ; PAIR PRODUCTION ; PHYSICS ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; PRODUCTION ; QUARKS ; STANDARD MODEL ; T QUARKS ; Top physics ; TOPOLOGY ; Total cross section ; TOTAL CROSS SECTIONS ; TRANSVERSE ENERGY
É parte de: Physics letters. B, 2012-02, Vol.707 (5), p.459
Notas: BNL-97241-2012-JA
DE-AC02-98CH10886
USDOE SC OFFICE OF SCIENCE (SC)
Descrição: A measurement of the production cross section of top quark pairs (t{bar t}) in proton-proton collisions at a center-of-mass energy of 7 TeV recorded with the ATLAS detector at the Large Hadron Collider is reported. Candidate events are selected in the dilepton topology with large missing transverse energy and at least two jets. Using a data sample corresponding to an integrated luminosity of 35 pb{sup -1}, a t{bar t} production cross section {sigma}{sub t{bar t}} = 177 {+-} 20(stat.) {+-} 14(syst.) {+-} 7(lum.) pb is measured for an assumed top quark mass of mt = 172.5 GeV. A second measurement requiring at least one jet identified as coming from a b quark yields a comparable result, demonstrating that the dilepton final states are consistent with being accompanied by b-quark jets. These measurements are in good agreement with Standard Model predictions.
Editor: United States
Idioma: Inglês

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Measurement of the top quark pair production cross section in pp collisions at root s=7 TeV in dilepton final states with ATLAS

Aad, G ; Abbott, B ; Abdallah, J ; Abdelalim, A A ; Abdesselam, A ; Abdinov, O ; Abi, B ; Abolins, M ; Abramowicz, H ; Abreu, H ; Acerbi, E ; Acharya, B S ; Adams, D L ; Addy, T N ; Adelman, J ; Aderholz, M ; Adomeit, S ; Adragna, P ; Adye, T ; Aefsky

United States

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