Measurements of top-quark pair differential cross-sections in the eμ channel in pp collisions at √s=13 TeV using the ATLAS detector

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Measurements of top-quark pair differential cross-sections in the eμ channel in pp collisions at √s=13 TeV using the ATLAS detector. / Aaboud, M; Aad, G; Abdallah, J; Abdinov, O; Abeloos, B; Aben, R; Åkesson, Torsten; Bocchetta, Simona; BRYNGEMARK, LENE; Doglioni, Caterina; Hedberg, Vincent; Jarlskog, Göran; Lytken, Else; Mjörnmark, Ulf; Smirnova, Oxana; ATLAS Collaboration.

In: European Physical Journal C, Vol. 77, No. 5, 292, 2017.

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TY - JOUR

T1 - Measurements of top-quark pair differential cross-sections in the eμ channel in pp collisions at √s=13 TeV using the ATLAS detector

AU - Aaboud, M

AU - Aad, G

AU - Abdallah, J

AU - Abdinov, O

AU - Abeloos, B

AU - Aben, R

AU - Åkesson, Torsten

AU - Bocchetta, Simona

AU - BRYNGEMARK, LENE

AU - Doglioni, Caterina

AU - Hedberg, Vincent

AU - Jarlskog, Göran

AU - Lytken, Else

AU - Mjörnmark, Ulf

AU - Smirnova, Oxana

AU - ATLAS Collaboration

N1 - Export Date: 12 June 2017

PY - 2017

Y1 - 2017

N2 - This article presents measurements of tt¯ differential cross-sections in a fiducial phase-space region, using an integrated luminosity of 3.2 fb−1 of proton–proton data at a centre-of-mass energy of s√=13 TeV recorded by the ATLAS experiment at the LHC in 2015. Differential cross-sections are measured as a function of the transverse momentum and absolute rapidity of the top quark, and of the transverse momentum, absolute rapidity and invariant mass of the tt¯ system. The tt¯ events are selected by requiring one electron and one muon of opposite electric charge, and at least two jets, one of which must be tagged as containing a b-hadron. The measured differential cross-sections are compared to predictions of next-to-leading order generators matched to parton showers and the measurements are found to be consistent with all models within the experimental uncertainties with the exception of the Powheg-Box+ Herwig++ predictions, which differ significantly from the data in both the transverse momentum of the top quark and the mass of the tt¯ system.

AB - This article presents measurements of tt¯ differential cross-sections in a fiducial phase-space region, using an integrated luminosity of 3.2 fb−1 of proton–proton data at a centre-of-mass energy of s√=13 TeV recorded by the ATLAS experiment at the LHC in 2015. Differential cross-sections are measured as a function of the transverse momentum and absolute rapidity of the top quark, and of the transverse momentum, absolute rapidity and invariant mass of the tt¯ system. The tt¯ events are selected by requiring one electron and one muon of opposite electric charge, and at least two jets, one of which must be tagged as containing a b-hadron. The measured differential cross-sections are compared to predictions of next-to-leading order generators matched to parton showers and the measurements are found to be consistent with all models within the experimental uncertainties with the exception of the Powheg-Box+ Herwig++ predictions, which differ significantly from the data in both the transverse momentum of the top quark and the mass of the tt¯ system.

U2 - 10.1140/epjc/s10052-017-4821-x

DO - 10.1140/epjc/s10052-017-4821-x

M3 - Article

VL - 77

JO - European Physical Journal C

T2 - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 5

M1 - 292

ER -