Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/43817
Título: | Measurement of the tt¯ production cross-section using eμ events with b-tagged jets in pp collisions at s=13TeV with the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
Data: | 2016 |
Editora: | Elsevier 1 |
Revista: | Physics Letters B |
Citação: | Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., . . . Zwalinski, L. (2016). Measurement of the tt¯ production cross-section using eμ events with b-tagged jets in pp collisions at s=13TeV with the ATLAS detector. [Article]. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 761, 136-157. doi: 10.1016/j.physletb.2016.08.019 |
Resumo(s): | This paper describes a measurement of the inclusive top quark pair production cross-section (View the MathML sourceσtt¯) with a data sample of View the MathML source3.2fb−1 of proton–proton collisions at a centre-of-mass energy of View the MathML sources=13TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron–muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b -tagged jets are counted and used to determine simultaneously View the MathML sourceσtt¯ and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: View the MathML sourceσtt¯=818±8(stat)±27(syst)±19(lumi)±12(beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/43817 |
DOI: | 10.1016/j.physletb.2016.08.019 |
ISSN: | 0370-2693 |
e-ISSN: | 1873-2445 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1-s2.0-S0370269316304397.pdf | 1,49 MB | Adobe PDF | Ver/Abrir |