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Measurement of the top pair production cross section in 8 TeV proton-proton collisions using kinematic information in the lepton plus jets final state with ATLAS
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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Number of Authors: 2828
2015 (English)In: PHYSICAL REVIEW D, ISSN 1550-2368, Vol. 91, no 11, 112013Article in journal (Refereed) Published
Abstract [en]

A measurement is presented of the (tt) over bar inclusive production cross section in pp collisions at a center-ofmass energy of pffisffiffi root s = 8 TeV using data collected by the ATLAS detector at the CERN Large Hadron Collider. The measurement was performed in the lepton + jets final state using a data set corresponding to an integrated luminosity of 20.3 fb(-1). The cross section was obtained using a likelihood discriminant fit and b-jet identification was used to improve the signal-to-background ratio. The inclusive (tt) over bar production cross section was measured to be 260 +/- 1(stat)(-23)(+22)(stat) +/- 8(lumi) +/- 4(beam) pb assuming a top-quark mass of 172.5 GeV, in good agreement with the theoretical prediction of 253(-15)(+13) pb. The (tt) over bar -> (e, mu) + jets production cross section in the fiducial region determined by the detector acceptance is also reported.

Place, publisher, year, edition, pages
American Physical Society , 2015. Vol. 91, no 11, 112013
Keyword [en]
HADRON COLLIDERS, PARTON DISTRIBUTIONS, LHC
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-171207DOI: 10.1103/PhysRevD.91.112013ISI: 000356829100002Scopus ID: 2-s2.0-84935457926OAI: oai:DiVA.org:kth-171207DiVA: diva2:842572
Note

QC 20150721

Available from: 2015-07-21 Created: 2015-07-21 Last updated: 2015-07-21Bibliographically approved

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Strandberg, Jonas

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