Name: Measurement of electroweak production of a W boson in association with two jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
Creator: CMS Collaboration
Published: 2020

Abstract

A measurement is presented of electroweak (EW) production of a W boson in association with two jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV. The data sample was recorded by the CMS Collaboration at the LHC and corresponds to an integrated luminosity of 35.9 fb$^{-1}$. The measurement is performed for the $\ell\nu$jj final state (with $\ell\nu$ indicating a lepton-neutrino pair, and j representing the quarks produced in the hard interaction) in a kinematic region defined by invariant mass $m_\mathrm{jj}$ $>$ 120 GeV and transverse momenta $p_\mathrm{T j}$ $>$ 25 GeV. The cross section of the process is measured in the electron and muon channels yielding $\sigma_\mathrm{EW}$(Wjj) = 6.23 $\pm$ 0.12 (stat) $\pm$ 0.61 (syst) pb per channel, in agreement with leading-order standard model predictions. The additional hadronic activity of events in a signal-enriched region is studied, and the measurements are compared with predictions. The final state is also used to perform a search for anomalous trilinear gauge couplings. Limits on anomalous trilinear gauge couplings associated with dimension-six operators are given in the framework of an effective field theory. The corresponding 95% confidence level intervals are $-$2.3 $<$ $c_{\mathrm{WWW}}/\Lambda^2$ $<$ 2.5 TeV$^{-2}$, $-$8.8 $<$ $c_{\mathrm{W}}/\Lambda^2$ $<$ 16 TeV$^{-2}$, and $-$45 $<$ $c_{\mathrm{B}}/\Lambda^2$ $<$ 46 TeV$^{-2}$. These results are combined with the CMS EW Zjj analysis, yielding the constraint on the $c_{\mathrm{WWW}}$ coupling: $-$1.8 $<$ $c_{\mathrm{WWW}}/\Lambda^2$ $<$ 2.0 TeV$^{-2}$.

Figure 8a

Contents of Figure 8 (left)

10.17182/hepdata.86211.v1/t1

Transformed BDT output distribution after the event preselection, in the muon channel.
Figure 8b

Contents of Figure 8 (right)

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Transformed BDT output distribution after the event preselection, in the electron channel.
Figure 10a

Contents of Figure 10 (left)

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Muon pT in data and SM backgrounds, and various aTGC scenarios after the event preselection, in the muon channel.
Figure 10b

Contents of Figure 10 (right)

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Electron pT in data and SM backgrounds, and various aTGC scenarios after the event preselection, in the electron channel.
Measured cross sections

Contents from Section 10 text

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Measured cross section and signal strength, relative to the standard model expectation.
Table 3

Contents of Table 3

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One-dimensional limits on the ATGC EFT parameters at 95% CL.
Table 4

Contents of Table 4

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One-dimensional limits on the ATGC effective Lagrangian (LEP parametrization) parameters at 95% CL.
Table 5

Contents of Table 5

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One-dimensional limits on the ATGC EFT parameters at 95% CL from the combination of EW Wjj and EW Zjj analyses.
Table 6

Contents of Table 6

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One-dimensional limits on the ATGC effective Lagrangian (LEP parametrization) parameters at 95% CL from the combination of EW Wjj and...
Figure 19a

Fig 19 (top left)

10.17182/hepdata.86211.v1/t10

Hadronic activity veto efficiencies in the signal-enriched BDT> 0.95 region for the muon and electron channels combined, as a function...
Figure 19b

Fig 19 (top right)

10.17182/hepdata.86211.v1/t11

Hadronic activity veto efficiencies in the signal-enriched BDT> 0.95 region for the muon and electron channels combined, as a function...
Figure 19c

Fig 19 (bottom left)

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Hadronic activity veto efficiencies in the signal-enriched BDT> 0.95 region for the muon and electron channels combined, as a function...
Figure 19d

Fig 19 (bottom right)

10.17182/hepdata.86211.v1/t13

Hadronic activity veto efficiencies in the signal-enriched BDT> 0.95 region for the muon and electron channels combined, as a function...

Figure 8a

Figure 8b

Figure 10a

Figure 10b

Measured cross sections

Table 3

Table 4

Table 5

Table 6

Figure 19a

Figure 19b

Figure 19c

Figure 19d

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