Measurement of the four-lepton invariant mass spectrum in 13 TeV proton-proton collisions with the ATLAS detector - INSPIRE

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Measurement of the four-lepton invariant mass spectrum in 13 TeV proton-proton collisions with the ATLAS detector

ATLAS

Collaboration

Feb 15, 2019

51 pages

Published in:

JHEP 04 (2019) 048

Published: Apr 5, 2019

e-Print:

1902.05892 [hep-ex]

DOI:

10.1007/JHEP04(2019)048 (publication)

PDG:

{{\mathit Z}}

\rightarrow

{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}

Report number:

CERN-EP-2018-318

Experiments:

CERN-LHC-ATLAS

View in:

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Abstract: (Springer)

A measurement of the four-lepton invariant mass spectrum is made with the ATLAS detector, using an integrated luminosity of 36.1 fb

^{−1}

of proton-proton collisions at

\sqrt{s}

= 13 TeV delivered by the Large Hadron Collider. The differential cross-section is measured for events containing two same-flavour opposite-sign lepton pairs. It exhibits a rich structure, with different mass regions dominated in the Standard Model by single Z boson production, Higgs boson production, and Z boson pair production, and non-negligible interference effects at high invariant masses. The measurement is compared with state-of-the-art Standard Model calculations, which are found to be consistent with the data. These calculations are used to interpret the data in terms of gg → ZZ → 4ℓ and Z → 4ℓ subprocesses, and to place constraints on a possible contribution from physics beyond the Standard Model.

Note:

51 pages in total, author list starting page 35, 15 figures, 3 tables, submitted to JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-09

Hadron-Hadron scattering (experiments)
p p: scattering
p p: colliding beams
Z0: single production
Z0: pair production
Higgs particle: hadroproduction
Z0: leptonic decay
differential cross section: measured
mass dependence
interference: effect

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