Measurement of top quark pair production in association with a Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV - INSPIRE

DataBETA

Measurement of top quark pair production in association with a Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV

CMS

Collaboration

Jul 25, 2019

47 pages

Published in:

JHEP 03 (2020) 056

Published: Mar 10, 2020

e-Print:

1907.11270 [hep-ex]

DOI:

10.1007/JHEP03(2020)056

PDG:

{{\mathit t}}{{\overline{\mathit t}}}{{\mathit Z}}

Production Cross Section in

{{\mathit p}}{{\mathit p}}

\sqrt {s }

Report number:

CNS-TOP-18-009,
CERN-EP-2019-124

Experiments:

CERN-LHC-CMS

View in:

reference search173 citations

Citations per year

Abstract: (Springer)

A measurement of the inclusive cross section of top quark pair production in association with a Z boson using proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC is performed. The data sample corresponds to an integrated luminosity of 77.5 fb

^{−1}

, collected by the CMS experiment during 2016 and 2017. The measurement is performed using final states containing three or four charged leptons (electrons or muons), and the Z boson is detected through its decay to an oppositely charged lepton pair. The production cross section is measured to be σ(

\mathrm{t}\overline{\mathrm{t}}\mathrm{Z}

) = 0.95 ± 0.05 (stat) ± 0.06 (syst) pb. For the first time, differential cross sections are measured as functions of the transverse momentum of the Z boson and the angular distribution of the negatively charged lepton from the Z boson decay. The most stringent direct limits to date on the anomalous couplings of the top quark to the Z boson are presented, including constraints on the Wilson coefficients in the framework of the standard model effective field theory.[graphic not available: see fulltext]

Note:

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-18-009 (CMS Public Pages)

Hadron-Hadron scattering (experiments)
Top physics
p p: colliding beams
Z0: associated production
top: pair production
p p: scattering
Z0: leptonic decay
Z0: transverse momentum
channel cross section: measured
top: coupling

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