Abstract (data abstract)

This paper presents a measurement of fiducial and differential cross-sections for $W^{+}W^{-}$ production in proton--proton collisions at $\sqrt{s}=13$~TeV with the ATLAS experiment at the Large Hadron Collider using a dataset corresponding to an integrated luminosity of 139~fb$^{-1}$. Events with exactly one electron, one muon and no hadronic jets are studied. The fiducial region in which the measurements are performed is inspired by searches for the electroweak production of supersymmetric charginos decaying to two-lepton final states. The selected events have moderate values of missing transverse momentum and the `stransverse mass' variable $m_{\textrm{T2}}$, which is widely used in searches for supersymmetry at the LHC. The ranges of these variables are chosen so that the acceptance is enhanced for direct $W^{+}W^{-}$ production and suppressed for production via top quarks, which is treated as a background. The fiducial cross-section and particle-level differential cross-sections for six variables are measured and compared with two theoretical SM predictions from perturbative QCD calculations.

Figure 1a

Data from Figure 1a

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Signal region detector-level distribution for the observable $|y_{e\mu}|$.
Figure 1b

Data from Figure 1b

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Signal region detector-level distribution for the observable $|\Delta \phi(e \mu)|$.
Figure 1c

Data from Figure 1c

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Signal region detector-level distribution for the observable $ \cos\theta^{\ast}$.
Figure 1d

Data from Figure 1d

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Signal region detector-level distribution for the observable $p_{\mathrm{T}}^{\mathrm{lead}\, \ell}$.
Figure 1e

Data from Figure 1e

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Signal region detector-level distribution for the observable $m_{e\mu}$.
Figure 1f

Data from Figure 1f

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Signal region detector-level distribution for the observable $p_{\mathrm{T}}^{e\mu}$.
Figure 3a

Data from Figure 3a

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Measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $|y_{e\mu}|$
Figure 3b

Data from Figure 3b

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Relative systematic uncertainties for the fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $|y_{e\mu}|$
Figure 3c

Data from Figure 3c

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Measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $|\Delta \phi(e \mu)|$
Figure 3d

Data from Figure 3d

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Relative systematic uncertainties for the fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $|\Delta \phi(e \mu)|$
Figure 3e

Data from Figure 3e

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Measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $ \cos\theta^{\ast}$
Figure 3f

Data from Figure 3f

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Relative systematic uncertainties for the fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $ \cos\theta^{\ast}$
Figure 4a

Data from Figure 4a

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Measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $p_{\mathrm{T}}^{\mathrm{lead}\, \ell}$
Figure 4b

Data from Figure 4b

10.17182/hepdata.132115.v1/t14

Relative systematic uncertainties for the fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $p_{\mathrm{T}}^{\mathrm{lead}\, \ell}$
Figure 4c

Data from Figure 4c

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Measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $m_{e\mu}$
Figure 4d

Data from Figure 4d

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Relative systematic uncertainties for the fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $m_{e\mu}$
Figure 4e

Data from Figure 4e

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Measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $p_{\mathrm{T}}^{e\mu}$
Figure 4f

Data from Figure 4f

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Relative systematic uncertainties for the fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for the observable $p_{\mathrm{T}}^{e\mu}$
Aux. Figure 3a

Data from additional Figure 3a complementing Figures 3a and b

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The statistical correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 3b

Data from additional Figure 3b complementing Figures 3a and b

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The total correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 4a

Data from additional Figure 4a complementing Figures 3c and d

10.17182/hepdata.132115.v1/t21

The statistical correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 4b

Data from additional Figure 4b complementing Figures 3c and d

10.17182/hepdata.132115.v1/t22

The total correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 5a

Data from additional Figure 5a complementing Figures 3e and f

10.17182/hepdata.132115.v1/t23

The statistical correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 5b

Data from additional Figure 5b complementing Figures 3e and f

10.17182/hepdata.132115.v1/t24

The total correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 6a

Data from additional Figure 6a complementing Figures 4a and b

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The statistical correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 6b

Data from additional Figure 6b complementing Figures 4a and b

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The total correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 7a

Data from additional Figure 7a complementing Figures 4c and d

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The statistical correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 7b

Data from additional Figure 7b complementing Figures 4c and d

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The total correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 8a

Data from additional Figure 8a complementing Figures 4e and f

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The statistical correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...
Aux. Figure 8b

Data from additional Figure 8b complementing Figures 4e and f

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The total correlation coefficients (in percentage) between bins for the measured fiducial differential cross-section of $WW \rightarrow e^{\pm}\nu\mu^{\mp}\nu$ production for...

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