Measurements of ${\mathrm{p}} {\mathrm{p}} \rightarrow {\mathrm{Z}} {\mathrm{Z}}$ production cross sections and constraints on anomalous triple gauge couplings at $\sqrt{s} = 13\,\text {TeV}$

The collaboration
Eur.Phys.J.C 81 (2021) 200, 2021.

Abstract (data abstract)
The production of Z boson pairs in proton-proton (pp) collisions, pp →(Z/γ∗)(Z/γ∗) → 2l2l', where l, l' = e or µ, is studied at a center-of-mass energy of 13 TeV with the CMS detector at the CERN LHC. The data sample corresponds to an integrated luminosity of $137~\mathrm{fb}^{-1}$, collected during 2016–2018. The ZZ production cross section, $\sigma_{tot}$(pp → ZZ) = 17.4±0.3 (stat)±0.5 (syst)±0.4 (theo)±0.3 (lumi) pb, measured for events with two pairs of opposite-sign, same-flavor leptons produced in the mass region 60 < $m_{l^+l^−}$ < 120 GeV is consistent with standard model predictions. Differential cross sections are also measured and agree with theoretical predictions. The invariant mass distribution of the four-lepton system is used to set limits on anomalous ZZZ and ZZγ couplings.

• #### Figure 1

Data from Figure 4 (left), located on page 12.

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Differential cross sections normalized to the fiducial cross section for the combined 4e, 2e2µ, and 4µ decay channels as a...

• #### Figure 2

Data from Figure 4 (right), located on page 12.

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Differential cross sections normalized to the fiducial cross section for the combined 4e, 2e2µ, and 4µ decay channels as a...

• #### Figure 3

Data from Figure 5 (left), located on page 13.

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Differential cross sections normalized to the fiducial cross section for the combined 4e, 2e2µ, and 4µ decay channels as a...

• #### Figure 4

Data from Figure 5 (right), located on page 13.

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Differential cross sections normalized to the fiducial cross section for the combined 4e, 2e2µ, and 4µ decay channels as a...

• #### Figure 5

Data from Figure 6 (left), located on page 14.

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Differential cross sections normalized to the fiducial cross section for the combined 4e, 2e2µ, and 4µ decay channels as a...

• #### Figure 6

Data from Figure 6 (right), located on page 14.

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Differential cross sections normalized to the fiducial cross section for the combined 4e, 2e2µ, and 4µ decay channels as a...

• #### Table 1

Data from Table 3, located on page 8.

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Measured fiducial cross section for each data sample and combined. The first uncertainty is statistical, the second is experimental systematic,...

• #### Table 2

Data from Table 4, located on page 9.

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Measured total σ(pp → ZZ) cross section for each data sample and combined. The first uncertainty is statistical, the second...

• #### Table 3

Data from Table 5(top), located on page 17.

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Expected and observed one-dimensional 95% CL limits on aTGC parameters. The corresponding constrains on EFT parameters are estimated using the...

• #### Table 4

Data from Table 5(bottom), located on page 17.

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Expected and observed one-dimensional 95% CL limits on aTGC parameters. The corresponding constrains on EFT parameters are estimated using the...