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| CMS-PAS-SMP-20-003 | ||
| Measurement of mass dependence of the transverse momentum of Drell Yan lepton pairs in proton-proton collisions at $\sqrt{s} = $ 13 TeV | ||
| CMS Collaboration | ||
| April 2021 | ||
| Abstract: The double differential cross sections of the Drell-Yan lepton pair ($\ell^+\ell^-$, electron or muon) production, as a function of its invariant mass $m_{\ell\ell}$, transverse momentum $p_\mathrm{T}(\ell\ell)$, and $\varphi^*$ are measured. The $\varphi^*$ observable is highly correlated with $p_\mathrm{T}(\ell\ell)$ and is used to probe the low $p_\mathrm{T}(\ell\ell)$ region in a complementary way. Drell-Yan masses up to 1 TeV are investigated. Additionally, a measurement is performed requiring at least one jet in the final state. To benefit from partial cancellation of the systematic uncertainty, the ratios of the differential cross sections in $p_\mathrm{T}(\ell\ell)$ and $\varphi^*$ for the $m_{\ell\ell}$ bins around the Z mass peak over the one on the Z mass peak are presented. The collected data correspond to an integrated luminosity of 36.3 fb$^{-1}$ of proton-proton collisions recorded with the CMS detector at the LHC at the center-of-mass energy of 13 TeV in 2016. Measurements are compared to state-of-the-art predictions based on perturbative quantum chromodynamics including soft gluon resummation. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, EPJC 83 (2023) 628. The superseded preliminary plots can be found here. |
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| Figures | |
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Figure 1:
Distributions of events passing the selection requirements in the muon channel (left) and electron channel (right). Each plot also presents in the lower part a ratio of simulation over data. Only statistical uncertainties on the data are shown, as error bars on the points. No bin width division is performed. The different background contributions are discussed in the text. |
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Figure 1-a:
Distributions of events passing the selection requirements in the muon channel (left) and electron channel (right). Each plot also presents in the lower part a ratio of simulation over data. Only statistical uncertainties on the data are shown, as error bars on the points. No bin width division is performed. The different background contributions are discussed in the text. |
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Figure 1-b:
Distributions of events passing the selection requirements in the muon channel (left) and electron channel (right). Each plot also presents in the lower part a ratio of simulation over data. Only statistical uncertainties on the data are shown, as error bars on the points. No bin width division is performed. The different background contributions are discussed in the text. |
png pdf |
Figure 2:
Distributions of events passing the selection requirements in the electron channel as a function of the dilepton ${p_{\mathrm {T}}}$ in five ranges of invariant mass: 50 to 76 GeV (top left), 76 to 106 GeV (top middle), 106 to 170 GeV (top right), 170 to 350 GeV (bottom left), and 350 to 1000 GeV (bottom right). More details are given in Fig. 1. |
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Figure 2-a:
Distributions of events passing the selection requirements in the electron channel as a function of the dilepton ${p_{\mathrm {T}}}$ in five ranges of invariant mass: 50 to 76 GeV (top left), 76 to 106 GeV (top middle), 106 to 170 GeV (top right), 170 to 350 GeV (bottom left), and 350 to 1000 GeV (bottom right). More details are given in Fig. 1. |
png pdf |
Figure 2-b:
Distributions of events passing the selection requirements in the electron channel as a function of the dilepton ${p_{\mathrm {T}}}$ in five ranges of invariant mass: 50 to 76 GeV (top left), 76 to 106 GeV (top middle), 106 to 170 GeV (top right), 170 to 350 GeV (bottom left), and 350 to 1000 GeV (bottom right). More details are given in Fig. 1. |
png pdf |
Figure 2-c:
Distributions of events passing the selection requirements in the electron channel as a function of the dilepton ${p_{\mathrm {T}}}$ in five ranges of invariant mass: 50 to 76 GeV (top left), 76 to 106 GeV (top middle), 106 to 170 GeV (top right), 170 to 350 GeV (bottom left), and 350 to 1000 GeV (bottom right). More details are given in Fig. 1. |
png pdf |
Figure 2-d:
Distributions of events passing the selection requirements in the electron channel as a function of the dilepton ${p_{\mathrm {T}}}$ in five ranges of invariant mass: 50 to 76 GeV (top left), 76 to 106 GeV (top middle), 106 to 170 GeV (top right), 170 to 350 GeV (bottom left), and 350 to 1000 GeV (bottom right). More details are given in Fig. 1. |
png pdf |
Figure 2-e:
Distributions of events passing the selection requirements in the electron channel as a function of the dilepton ${p_{\mathrm {T}}}$ in five ranges of invariant mass: 50 to 76 GeV (top left), 76 to 106 GeV (top middle), 106 to 170 GeV (top right), 170 to 350 GeV (bottom left), and 350 to 1000 GeV (bottom right). More details are given in Fig. 1. |
png pdf |
Figure 3:
Systematics breakdown of differential cross sections in ${{p_{\mathrm {T}}} (\ell \ell)}$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (middle left), 170 $ < {m_{\ell \ell}} < $ 350 GeV (middle right), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 3-a:
Systematics breakdown of differential cross sections in ${{p_{\mathrm {T}}} (\ell \ell)}$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (middle left), 170 $ < {m_{\ell \ell}} < $ 350 GeV (middle right), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 3-b:
Systematics breakdown of differential cross sections in ${{p_{\mathrm {T}}} (\ell \ell)}$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (middle left), 170 $ < {m_{\ell \ell}} < $ 350 GeV (middle right), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 3-c:
Systematics breakdown of differential cross sections in ${{p_{\mathrm {T}}} (\ell \ell)}$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (middle left), 170 $ < {m_{\ell \ell}} < $ 350 GeV (middle right), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 3-d:
Systematics breakdown of differential cross sections in ${{p_{\mathrm {T}}} (\ell \ell)}$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (middle left), 170 $ < {m_{\ell \ell}} < $ 350 GeV (middle right), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 3-e:
Systematics breakdown of differential cross sections in ${{p_{\mathrm {T}}} (\ell \ell)}$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (middle left), 170 $ < {m_{\ell \ell}} < $ 350 GeV (middle right), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 4:
Systematic uncertainty breakdown of differential cross section ratios in ${{p_{\mathrm {T}}} (\ell \ell)}$ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 4-a:
Systematic uncertainty breakdown of differential cross section ratios in ${{p_{\mathrm {T}}} (\ell \ell)}$ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 4-b:
Systematic uncertainty breakdown of differential cross section ratios in ${{p_{\mathrm {T}}} (\ell \ell)}$ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 4-c:
Systematic uncertainty breakdown of differential cross section ratios in ${{p_{\mathrm {T}}} (\ell \ell)}$ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 4-d:
Systematic uncertainty breakdown of differential cross section ratios in ${{p_{\mathrm {T}}} (\ell \ell)}$ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The black line is the quadratic sum of the colored lines. |
png pdf |
Figure 5:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The error bars on data points (black dots) correspond to the statistical uncertainty and the shaded bands around the data points correspond to the total experimental uncertainty. The measurement is compared to aMC@NLO + PYTHIA 8 (blue dots), arTeMiDe (green triangles), aMC@NLO + PB (Cascade) (red triangles), and GENEVA (yellow dots). The light blue band around aMC@NLO corresponds to the statistical uncertainty of the simulation, the dark blue band includes the QCD scale uncertainty, and the largest band includes the PDF and $ {\alpha _S} $ uncertainties, added in quadrature. The light (dark) green band around arTeMiDe predictions represent the non-perturbative (QCD scale) uncertainties, the darker green representing the QED FSR correction uncertainties. The arTeMiDe predictions without QED FSR corrections are shown in pink. The range of invalidity of the arTeMiDe predictions is shaded with a grey band. The light (dark) red bands around Cascade represents the statistical (QCD scale) uncertainties of the simulation, where the TMD uncertainty is represented with empty red box. The yellow (orange) bands around GENEVA represents the statistical (QCD scale and resummation) uncertainties of the simulation. |
png pdf |
Figure 5-a:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The error bars on data points (black dots) correspond to the statistical uncertainty and the shaded bands around the data points correspond to the total experimental uncertainty. The measurement is compared to aMC@NLO + PYTHIA 8 (blue dots), arTeMiDe (green triangles), aMC@NLO + PB (Cascade) (red triangles), and GENEVA (yellow dots). The light blue band around aMC@NLO corresponds to the statistical uncertainty of the simulation, the dark blue band includes the QCD scale uncertainty, and the largest band includes the PDF and $ {\alpha _S} $ uncertainties, added in quadrature. The light (dark) green band around arTeMiDe predictions represent the non-perturbative (QCD scale) uncertainties, the darker green representing the QED FSR correction uncertainties. The arTeMiDe predictions without QED FSR corrections are shown in pink. The range of invalidity of the arTeMiDe predictions is shaded with a grey band. The light (dark) red bands around Cascade represents the statistical (QCD scale) uncertainties of the simulation, where the TMD uncertainty is represented with empty red box. The yellow (orange) bands around GENEVA represents the statistical (QCD scale and resummation) uncertainties of the simulation. |
png pdf |
Figure 5-b:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The error bars on data points (black dots) correspond to the statistical uncertainty and the shaded bands around the data points correspond to the total experimental uncertainty. The measurement is compared to aMC@NLO + PYTHIA 8 (blue dots), arTeMiDe (green triangles), aMC@NLO + PB (Cascade) (red triangles), and GENEVA (yellow dots). The light blue band around aMC@NLO corresponds to the statistical uncertainty of the simulation, the dark blue band includes the QCD scale uncertainty, and the largest band includes the PDF and $ {\alpha _S} $ uncertainties, added in quadrature. The light (dark) green band around arTeMiDe predictions represent the non-perturbative (QCD scale) uncertainties, the darker green representing the QED FSR correction uncertainties. The arTeMiDe predictions without QED FSR corrections are shown in pink. The range of invalidity of the arTeMiDe predictions is shaded with a grey band. The light (dark) red bands around Cascade represents the statistical (QCD scale) uncertainties of the simulation, where the TMD uncertainty is represented with empty red box. The yellow (orange) bands around GENEVA represents the statistical (QCD scale and resummation) uncertainties of the simulation. |
png pdf |
Figure 5-c:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The error bars on data points (black dots) correspond to the statistical uncertainty and the shaded bands around the data points correspond to the total experimental uncertainty. The measurement is compared to aMC@NLO + PYTHIA 8 (blue dots), arTeMiDe (green triangles), aMC@NLO + PB (Cascade) (red triangles), and GENEVA (yellow dots). The light blue band around aMC@NLO corresponds to the statistical uncertainty of the simulation, the dark blue band includes the QCD scale uncertainty, and the largest band includes the PDF and $ {\alpha _S} $ uncertainties, added in quadrature. The light (dark) green band around arTeMiDe predictions represent the non-perturbative (QCD scale) uncertainties, the darker green representing the QED FSR correction uncertainties. The arTeMiDe predictions without QED FSR corrections are shown in pink. The range of invalidity of the arTeMiDe predictions is shaded with a grey band. The light (dark) red bands around Cascade represents the statistical (QCD scale) uncertainties of the simulation, where the TMD uncertainty is represented with empty red box. The yellow (orange) bands around GENEVA represents the statistical (QCD scale and resummation) uncertainties of the simulation. |
png pdf |
Figure 5-d:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The error bars on data points (black dots) correspond to the statistical uncertainty and the shaded bands around the data points correspond to the total experimental uncertainty. The measurement is compared to aMC@NLO + PYTHIA 8 (blue dots), arTeMiDe (green triangles), aMC@NLO + PB (Cascade) (red triangles), and GENEVA (yellow dots). The light blue band around aMC@NLO corresponds to the statistical uncertainty of the simulation, the dark blue band includes the QCD scale uncertainty, and the largest band includes the PDF and $ {\alpha _S} $ uncertainties, added in quadrature. The light (dark) green band around arTeMiDe predictions represent the non-perturbative (QCD scale) uncertainties, the darker green representing the QED FSR correction uncertainties. The arTeMiDe predictions without QED FSR corrections are shown in pink. The range of invalidity of the arTeMiDe predictions is shaded with a grey band. The light (dark) red bands around Cascade represents the statistical (QCD scale) uncertainties of the simulation, where the TMD uncertainty is represented with empty red box. The yellow (orange) bands around GENEVA represents the statistical (QCD scale and resummation) uncertainties of the simulation. |
png pdf |
Figure 5-e:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). The error bars on data points (black dots) correspond to the statistical uncertainty and the shaded bands around the data points correspond to the total experimental uncertainty. The measurement is compared to aMC@NLO + PYTHIA 8 (blue dots), arTeMiDe (green triangles), aMC@NLO + PB (Cascade) (red triangles), and GENEVA (yellow dots). The light blue band around aMC@NLO corresponds to the statistical uncertainty of the simulation, the dark blue band includes the QCD scale uncertainty, and the largest band includes the PDF and $ {\alpha _S} $ uncertainties, added in quadrature. The light (dark) green band around arTeMiDe predictions represent the non-perturbative (QCD scale) uncertainties, the darker green representing the QED FSR correction uncertainties. The arTeMiDe predictions without QED FSR corrections are shown in pink. The range of invalidity of the arTeMiDe predictions is shaded with a grey band. The light (dark) red bands around Cascade represents the statistical (QCD scale) uncertainties of the simulation, where the TMD uncertainty is represented with empty red box. The yellow (orange) bands around GENEVA represents the statistical (QCD scale and resummation) uncertainties of the simulation. |
png pdf |
Figure 6:
Ratios of differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 6-a:
Ratios of differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 6-b:
Ratios of differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 6-c:
Ratios of differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 6-d:
Ratios of differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 7:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for one or more jets in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (bottom left), and 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 7-a:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for one or more jets in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (bottom left), and 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 7-b:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for one or more jets in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (bottom left), and 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 7-c:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for one or more jets in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (bottom left), and 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 7-d:
Differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for one or more jets in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top right), 106 $ < {m_{\ell \ell}} < $ 170 GeV (bottom left), and 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 8:
Ratios of differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for one or more jets in different for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), and 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 8-a:
Ratios of differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for one or more jets in different for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), and 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 8-b:
Ratios of differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for one or more jets in different for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), and 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 8-c:
Ratios of differential unfolded cross sections in $ {{p_{\mathrm {T}}} (\ell \ell)} $ for one or more jets in different for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), and 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 9:
Differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5 |
png pdf |
Figure 9-a:
Differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5 |
png pdf |
Figure 9-b:
Differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5 |
png pdf |
Figure 9-c:
Differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5 |
png pdf |
Figure 9-d:
Differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5 |
png pdf |
Figure 9-e:
Differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ in different invariant mass ranges: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 76 $ < {m_{\ell \ell}} < $ 106 GeV (top center), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5 |
png pdf |
Figure 10:
Ratios of differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 10-a:
Ratios of differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 10-b:
Ratios of differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 10-c:
Ratios of differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
png pdf |
Figure 10-d:
Ratios of differential unfolded cross sections in $ {\varphi ^*} (\ell \ell)$ for invariant mass ranges with respect to the peak region 76 $ < {m_{\ell \ell}} < $ 106 GeV: 50 $ < {m_{\ell \ell}} < $ 76 GeV (top left), 106 $ < {m_{\ell \ell}} < $ 170 GeV (top right), 170 $ < {m_{\ell \ell}} < $ 350 GeV (bottom left), and 350 $ < {m_{\ell \ell}} < $ 1000 GeV (bottom right). Details on the presentation of the results is given in Fig. 5. |
| Tables | |
png pdf |
Table 1:
Differential cross section in $ {p_{\mathrm {T}}} (\ell \ell)$ for the 50 $ < m_{\ell \ell}\le $ 76 GeV mass window in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 2:
Differential cross section in $ {p_{\mathrm {T}}} (\ell \ell)$ for the 76 $ < m_{\ell \ell}\le $ 106 GeV mass window in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 3:
Differential cross section in $ {p_{\mathrm {T}}} (\ell \ell)$ for the 106 $ < m_{\ell \ell}\le $ 170 GeV mass window in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 4:
Differential cross section in $ {p_{\mathrm {T}}} (\ell \ell)$ for the 170 $ < m_{\ell \ell}\le $ 350 GeV mass window in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 5:
Differential cross section in $ {p_{\mathrm {T}}} (\ell \ell)$ for the 350 $ < m_{\mathrm{e} \mathrm{e}}\le $ 1000 GeV mass window in the electron channel, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 6:
Differential cross section in $ {p_{\mathrm {T}}} (\ell \ell)$ for the 50 $ < m_{\ell \ell}\le $ 76 GeV mass window for Z + $\geq $ 1 jet case in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 7:
Differential cross section in $ {p_{\mathrm {T}}} (\ell \ell)$ for the 76 $ < m_{\ell \ell}\le $ 106 GeV mass window for Z + $\geq $ 1 jet case in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 8:
Differential cross section in $ {p_{\mathrm {T}}} (\ell \ell)$ for the 106 $ < m_{\ell \ell}\le $ 170 GeV mass window for Z + $\geq $ 1 jet case in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 9:
Differential cross section in $ {p_{\mathrm {T}}} (\ell \ell)$ for the 170 $ < m_{\ell \ell}\le $ 350 GeV mass window for Z + $\geq $ 1 jet case in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 10:
Differential cross section in $ {\varphi ^*} (\ell \ell)$ for the 50 $ < m_{\ell \ell}\le $ 76 GeV mass window in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 11:
Differential cross section in $ {\varphi ^*} (\ell \ell)$ for the 76 $ < m_{\ell \ell}\le $ 106 GeV mass window in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 12:
Differential cross section in $ {\varphi ^*} (\ell \ell)$ for the 106 $ < m_{\ell \ell}\le $ 170 GeV mass window in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 13:
Differential cross section in $ {\varphi ^*} (\ell \ell)$ for the 170 $ < m_{\ell \ell}\le $ 350 GeV mass window in the combination of the two channels, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 14:
Differential cross section in $ {\varphi ^*} (\ell \ell)$ for the 350 $ < m_{\mathrm{e} \mathrm{e}} $ 1000 GeV mass window in the combination of the electron channel, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 15:
Differential cross section ratio in $ {p_{\mathrm {T}}} (\ell \ell)$ of the 50 $ < m_{\ell \ell}\le $ 76 GeV mass window in the combination of the two channels to the 76 $ < {m_{\ell \ell}} \le $ 106 GeV, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 16:
Differential cross section ratio in $ {p_{\mathrm {T}}} (\ell \ell)$ of the 106 $ < m_{\ell \ell}\le $ 170 GeV mass window in the combination of the two channels to the 76 $ < {m_{\ell \ell}} \le $ 106 GeV, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 17:
Differential cross section ratio in $ {p_{\mathrm {T}}} (\ell \ell)$ of the 170 $ < m_{\ell \ell}\le $ 350 GeV mass window in the combination of the two channels to the 76 $ < {m_{\ell \ell}} \le $ 106 GeV, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 18:
Differential cross section ratio in $ {p_{\mathrm {T}}} (\ell \ell)$ of the 350 $ < m_{\mathrm{e} \mathrm{e}}\le $ 1000 GeV mass window in the electron channel to the 76 $ < {m_{\ell \ell}} \le $ 106 GeV, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 19:
Differential cross section ratio in $ {p_{\mathrm {T}}} (\ell \ell)$ of the 50 $ < m_{\ell \ell}\le $ 76 GeV mass window in the combination of the two channels for Z + $\geq $ 1 jet case to the 76 $ < {m_{\ell \ell}} \le $106 GeV for Z + $\geq $ 1 jet case, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 20:
Differential cross section ratio in $ {p_{\mathrm {T}}} (\ell \ell)$ of the 106 $ < m_{\ell \ell}\le $ 170 GeV mass window in the combination of the two channels for Z + $\geq $ 1 jet case to the 76 $ < {m_{\ell \ell}} \le $106 GeV for Z + $\geq $ 1 jet case, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 21:
Differential cross section ratio in $ {p_{\mathrm {T}}} (\ell \ell)$ of the 170 $ < m_{\ell \ell}\le $ 350 GeV mass window in the combination of the two channels for Z + $\geq $ 1 jet case to the 76 $ < {m_{\ell \ell}} \le $106 GeV for Z + $\geq $ 1 jet case, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 22:
Differential cross section ratio in $ {\varphi ^*} (\ell \ell)$ of the 50 $ < m_{\ell \ell}\le $ 76 GeV mass window in the combination of the two channels to the 76 $ < {m_{\ell \ell}} \le $106 GeV, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 23:
Differential cross section ratio in $ {\varphi ^*} (\ell \ell)$ of the 106 $ < m_{\ell \ell}\le $ 170 GeV mass window in the combination of the two channels to the 76 $ < {m_{\ell \ell}} \le $106 GeV, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 24:
Differential cross section ratio in $ {\varphi ^*} (\ell \ell)$ of the 170 $ < m_{\ell \ell}\le $ 350 GeV mass window in the combination of the two channels to the 76 $ < {m_{\ell \ell}} \le $106 GeV, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
png pdf |
Table 25:
Differential cross section ratio in $ {\varphi ^*} (\ell \ell)$ of the 350 $ < m_{\mathrm{e} \mathrm{e}} $ 1000 GeV mass window in the electron channel to the 76 $ < {m_{\ell \ell}} \le $106 GeV, and breakdown of the uncertainties. A dash (-) in the table means the uncertainty is less than 0.01%. |
| Summary |
|
Measurements of differential Z/${\gamma^*}$ production cross sections in proton-proton collisions at $\sqrt{s} = $ 13 TeV in the dielectron and dimuon final states are presented, using the data collected with the CMS detector corresponding to an integrated luminosity of 36.3 fb$^{-1}$. The measurements have been corrected for detector effects and the two leptonic channels have been combined. Differential cross sections in the dilepton transverse momentum, ${p_{\mathrm{T}}(\ell\ell)}$, and in the lepton angular variable ${\varphi^*}$ are measured for different values of the dilepton mass, ${m_{\ell\ell}} $, between 50 GeV and 1 TeV. In addition, dilepton transverse momentum distributions are shown in presence of at least one jet in the detector acceptance. The rising behavior at small ${p_{\mathrm{T}}(\ell\ell)}$ is attributed to soft QCD radiation, while the tail at large ${p_{\mathrm{T}}(\ell\ell)}$ is only expected to be well described by models relying on higher order matrix element calculations. Therefore these measurements provide a good sensitivity to initial state QCD radiations and can be compared to different predictions resumming the initial state soft QCD radiations. The measurements are compared to NLO aMC@NLO Monte Carlo predictions using parton shower, showing a generally good agreement, except at ${p_{\mathrm{T}}(\ell\ell)}$ values below 10 GeV. This disagreement is enhanced for masses away from the Z mass peak and is more pronounced for the highest mass reaching 20% for the highest mass bin. On the contrary, TMD based approaches give a very good description of the low ${p_{\mathrm{T}}(\ell\ell)}$ distributions. These two predictions, arTeMiDe and Cascade , based on independent TMDs parametrisations, offer a valuable alternative to the Parton Shower approach, relying on less fitted parameters. Nevertheless the validity of the arTeMiDe approach, in its present treatment, is limited to transverse momenta lower than the QCD dominant scale (here the dilepton mass). The comparison to GENEVA prediction is not satisfying for low ${p_{\mathrm{T}}(\ell\ell)}$ values at any dilepton mass. This is partially due to the ${\alpha_S}$ value choice, as confirmed by the ratio of different dilepton masses measurements as a function of ${p_{\mathrm{T}}(\ell\ell)}$ where the dependence on the ${\alpha_S}$ value is largely reduced. The GENEVA high ${p_{\mathrm{T}}(\ell\ell)}$ prediction, based on NNLO matrix element, is the only prediction presented here in agreement with the measurement in all dilepton mass bins, showing the importance of higher order matrix element inclusion in that phase space region. The cross section measurement in presence of at least one hard jet provides additional constrains on the predictions. In particular the low ${p_{\mathrm{T}}(\ell\ell)}$ region exhibits a strong sensitivity to high order contributions. Given the strong correlation between the ${p_{\mathrm{T}}(\ell\ell)}$ and ${\varphi^*}$ variables the same kind of behavior is to be expected and is observed. The measurements of Z + 1 jet are in good agreement with the predictions for all masses. The measurements of the cross section as a function of ${\varphi^*}$ provide more precision both experimentally and for the predictions but less discrimination between the models. Overall, the predictions involving TMDs give a better description in the region of the phase-space sensitive to these effects. |
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