CERN Accelerating science

The observed dimuon (left) and dielectron (right) invariant mass spectra. No corrections are applied to the distributions. The points with error bars represent the data, while the various contributions from simulated events are shown as stacked histograms. By ``EWK'' we denote $Z/\gamma^* \rightarrow \tau \tau$, $\text{W} \rightarrow \ell\nu$, and diboson production. The ``QCD'' contribution results from processes associated with QCD and could be genuine or misidentified leptons. The lower panels show the ratios between the measured and the simulated distributions including the statistical uncertainties from both.

The observed dimuon (left) and dielectron (right) invariant mass spectra. No corrections are applied to the distributions. The points with error bars represent the data, while the various contributions from simulated events are shown as stacked histograms. By ``EWK'' we denote $Z/\gamma^* \rightarrow \tau \tau$, $\text{W} \rightarrow \ell\nu$, and diboson production. The ``QCD'' contribution results from processes associated with QCD and could be genuine or misidentified leptons. The lower panels show the ratios between the measured and the simulated distributions including the statistical uncertainties from both.

The response matrices for the muon (left) and electron (right) channels from simulation.

The response matrices for the muon (left) and electron (right) channels from simulation.

DY acceptance (blue, filled circles), efficiency (red, open triangles), and their product (black, open squares) per invariant mass bin, for the $\mu^+\mu^-$ (left) and $\ee$ (right) channels.

DY acceptance (blue, filled circles), efficiency (red, open triangles), and their product (black, open squares) per invariant mass bin, for the $\mu^+\mu^-$ (left) and $\ee$ (right) channels.

noimg: Results for the DY spectrum normalized to the Z region in the dimuon channel. The statistical and systematic uncertainties are summed in quadrature. $\RPOSTFSR$ and $\RPOSTFSRDET$ are calculated using Eqs.~(\ref{eqn:fullCrossSectionRatio}) and~(\ref{eqn:fullCrossSectionRatio_DET}), respectively. The $\RDET$ and $R$ are calculated using the FSR corrections given in Table~\ref{tab_accEff}.: Results for the DY spectrum normalized to the Z region in the dielectron channel. The statistical and systematic uncertainties are summed in quadrature. $\RPOSTFSR$ and $\RPOSTFSRDET$ are calculated using Eqs.~(\ref{eqn:fullCrossSectionRatio}) and~(\ref{eqn:fullCrossSectionRatio_DET}), respectively. The $\RDET$ and $R$ are calculated using the FSR corrections given in Table~\ref{tab_accEff_electrons}.: Theoretical predictions at NNLO with FEWZ and three sets of PDFs. The cross sections in this table are calculated in the full phase space with 1\% statistical precision. The theoretical predictions of the ratio $R$ and its uncertainties are also given. ``Other'' contains uncertainties from EWK correction, scale dependence, and $\alpha_s$.: Results for the DY spectrum normalized to the Z region and to the invariant mass bin width, using Eq.~(\ref{eqn:shape_r}), before and after combining the two channels. The results presented are in {Ge\hspace{-.08em}V}$^{-1}$ units.

DY invariant mass spectrum, normalized to the Z resonance region, $r = (1/\sigma_{\mathrm{\ell\ell}}) d\sigma/d\MLL$, as measured and as predicted by NNLO calculations, for the full phase space. The vertical error bar indicates the experimental (statistical and systematic) uncertainties summed in quadrature with the theory uncertainty resulting from the model-dependent kinematic distributions inside each bin. The horizontal bars indicate bin sizes and the data points inside are placed according to Ref.~\cite{binCorrection}. The width of the theory curve represents uncertainties from Table \ref{tab_theory_fullacc}.