Abstract

Measurements of the inclusive and normalised differential cross sections are presented for the production of single top quarks in association with a W boson in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data used were recorded with the CMS detector at the LHC during 2016-2018, and correspond to an integrated luminosity of 138 fb$^{-1}$. Events containing one electron and one muon in the final state are analysed. For the inclusive measurement, a multivariate discriminant, exploiting the kinematic properties of the events is used to separate the signal from the dominant $\mathrm{t\bar{t}}$ background. A cross section of 79.2 $\pm$ 0.9 (stat) $^{+7.7}_{-8.0}$ (syst) $\pm$ 1.2 (lumi) pb is obtained, consistent with the predictions of the standard model. For the differential measurements, a fiducial region is defined according to the detector acceptance, and the requirement of exactly one jet coming from the fragmentation of a bottom quark. The resulting distributions are unfolded to particle level and agree with the predictions at next-to-leading order in perturbative quantum chromodynamics.

Figure 6a

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

10.17182/hepdata.128942.v1/t1

The distribution of the BDT discriminant for events in the 1j1b region. The data (points) and the MC predictions (coloured...
Figure 6b

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

10.17182/hepdata.128942.v1/t2

The distribution of the BDT discriminant for events in the 2j1b region. The data (points) and the MC predictions (coloured...
Figure 6c

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

10.17182/hepdata.128942.v1/t3

The distribution of the Subleading jet $p_{T}$ for events in the 2j2b region. The data (points) and the MC predictions...
Cross section

Data from page 13.

10.17182/hepdata.128942.v1/t4

Observed and theoretical cross sections. In the observed, the first uncertainty is statistical, the second is the systematic, and the...
Table 3

Data from Table 3, located on page 14.

10.17182/hepdata.128942.v1/t5

The number of observed and MC predicted events after the fit in the 1j1b, 2j1b, and 2j2b regions. The statistical...
Figure 8a

Data from Figure 8 (top left), located on page 17.

10.17182/hepdata.128942.v1/t6

Normalised fiducial differential tW production cross section as a function of the $Leading$ $lepton$ $p_{T}$. The vertical bars on the...
Figure 8b

Data from Figure 8 (top right), located on page 17.

10.17182/hepdata.128942.v1/t7

Normalised fiducial differential tW production cross section as a function of the $p_{Z}(e^{\pm}, \mu^{\pm}, j)$. The vertical bars on the...
Figure 8c

Data from Figure 8 (middle left), located on page 17.

10.17182/hepdata.128942.v1/t8

Normalised fiducial differential tW production cross section as a function of the $Jet$ $p_{T}$. The vertical bars on the points...
Figure 8d

Data from Figure 8 (middle right), located on page 17.

10.17182/hepdata.128942.v1/t9

Normalised fiducial differential tW production cross section as a function of the $m(e^{\pm}, \mu^{\pm}, j)$. The vertical bars on the...
Figure 8e

Data from Figure 8 (bottom left), located on page 17.

10.17182/hepdata.128942.v1/t10

Normalised fiducial differential tW production cross section as a function of the $\Delta\phi(e^{\pm}, \mu^{\pm})/\pi$. The vertical bars on the points...
Figure 8f

Data from Figure 8 (bottom right), located on page 17.

10.17182/hepdata.128942.v1/t11

Normalised fiducial differential tW production cross section as a function of the $m_{T}(e^{\pm}, \mu^{\pm}, j, p_{T}^{miss})$. The vertical bars on...
Tables 4 and 5

Data from Tables 4 and 5 located on page 15.

10.17182/hepdata.128942.v1/t12

The p-values from the goodness-of-fit tests comparing the six differential cross section measurements with the predictions from POWHEG (PH) +...
Supplemental material: Lep1_Pt response matrix

Supplemental material.

10.17182/hepdata.128942.v1/t13

Response matrix between detector and particle level for the $Leading$ $lepton$ $p_{T}$.
Supplemental material: Lep1Lep2Jet1MET_Pz response matrix

Supplemental material.

10.17182/hepdata.128942.v1/t14

Response matrix between detector and particle level for the $p_{Z}(e^{\pm}, \mu^{\pm}, j)$.
Supplemental material: Jet1_Pt response matrix

Supplemental material.

10.17182/hepdata.128942.v1/t15

Response matrix between detector and particle level for the $Jet$ $p_{T}$.
Supplemental material: Lep1Lep2Jet1_M response matrix

Supplemental material.

10.17182/hepdata.128942.v1/t16

Response matrix between detector and particle level for the $m(e^{\pm}, \mu^{\pm}, j)$.
Supplemental material: Lep1Lep2_DPhi response matrix

Supplemental material.

10.17182/hepdata.128942.v1/t17

Response matrix between detector and particle level for the $\Delta\phi(e^{\pm}, \mu^{\pm})/\pi$.
Supplemental material: Lep1Lep2Jet1MET_Mt response matrix

Supplemental material.

10.17182/hepdata.128942.v1/t18

Response matrix between detector and particle level for the $m_{T}(e^{\pm}, \mu^{\pm}, j, p_{T}^{miss})$.
Supplemental material: Lep1_Pt covariance matrix

Supplemental material.

10.17182/hepdata.128942.v1/t19

Covariance matrix including all uncertainties of the differential result for the $Leading$ $lepton$ $p_{T}$.
Supplemental material: Lep1Lep2Jet1MET_Pz covariance matrix

Supplemental material.

10.17182/hepdata.128942.v1/t20

Covariance matrix including all uncertainties of the differential result for the $p_{Z}(e^{\pm}, \mu^{\pm}, j)$.
Supplemental material: Jet1_Pt covariance matrix

Supplemental material.

10.17182/hepdata.128942.v1/t21

Covariance matrix including all uncertainties of the differential result for the $Jet$ $p_{T}$.
Supplemental material: Lep1Lep2Jet1_M covariance matrix

Supplemental material.

10.17182/hepdata.128942.v1/t22

Covariance matrix including all uncertainties of the differential result for the $m(e^{\pm}, \mu^{\pm}, j)$.
Supplemental material: Lep1Lep2_DPhi covariance matrix

Supplemental material.

10.17182/hepdata.128942.v1/t23

Covariance matrix including all uncertainties of the differential result for the $\Delta\phi(e^{\pm}, \mu^{\pm})/\pi$.
Supplemental material: Lep1Lep2Jet1MET_Mt covariance matrix

Supplemental material.

10.17182/hepdata.128942.v1/t24

Covariance matrix including all uncertainties of the differential result for the $m_{T}(e^{\pm}, \mu^{\pm}, j, p_{T}^{miss})$.

Figure 6a

Figure 6b

Figure 6c

Cross section

Table 3

Figure 8a

Figure 8b

Figure 8c

Figure 8d

Figure 8e

Figure 8f

Tables 4 and 5

Supplemental material: Lep1_Pt response matrix

Supplemental material: Lep1Lep2Jet1MET_Pz response matrix

Supplemental material: Jet1_Pt response matrix

Supplemental material: Lep1Lep2Jet1_M response matrix

Supplemental material: Lep1Lep2_DPhi response matrix

Supplemental material: Lep1Lep2Jet1MET_Mt response matrix

Supplemental material: Lep1_Pt covariance matrix

Supplemental material: Lep1Lep2Jet1MET_Pz covariance matrix

Supplemental material: Jet1_Pt covariance matrix

Supplemental material: Lep1Lep2Jet1_M covariance matrix

Supplemental material: Lep1Lep2_DPhi covariance matrix

Supplemental material: Lep1Lep2Jet1MET_Mt covariance matrix

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