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Abstract:

This paper describes a measurement of the inclusive top quark pair production cross-section (σ tt¯ ) with a data sample of 3.2fb −1 of proton–proton collisions at a centre-of-mass energy of s=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 σ tt¯ 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: σ tt¯ =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. © 2016 The Author(s)

Registro:

Documento: Artículo
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:Aaboud, M. et al.
Este artículo contiene 2856 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2856 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2016
Volumen:761
Página de inicio:136
Página de fin:157
DOI: http://dx.doi.org/10.1016/j.physletb.2016.08.019
Título revista:Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Título revista abreviado:Phys Lett Sect B Nucl Elem Part High-Energy Phys
ISSN:03702693
CODEN:PYLBA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v761_n_p136_Aaboud

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Citas:

---------- APA ----------
(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. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 761, 136-157.
http://dx.doi.org/10.1016/j.physletb.2016.08.019
---------- CHICAGO ----------
Aaboud, M. "Measurement of the tt¯ production cross-section using eμ events with b-tagged jets in pp collisions at √s=13TeV with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 761 (2016) : 136-157.
http://dx.doi.org/10.1016/j.physletb.2016.08.019
---------- MLA ----------
Aaboud, M. "Measurement of the tt¯ production cross-section using eμ events with b-tagged jets in pp collisions at √s=13TeV with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 761, 2016, pp. 136-157.
http://dx.doi.org/10.1016/j.physletb.2016.08.019
---------- VANCOUVER ----------
Aaboud, M. Measurement of the tt¯ production cross-section using eμ events with b-tagged jets in pp collisions at √s=13TeV with the ATLAS detector. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2016;761:136-157.
http://dx.doi.org/10.1016/j.physletb.2016.08.019