Measurement of W ± and Z -boson production cross sections in pp collisions at s=13 TeV with the ATLAS detector

By G. Aad, A. Kupco, P. Davison, S. Webb, S. Sekula, J. Huston, K. Jakobs, S. Diglio, T. Saito, M. Spousta and 2,835 more. 2016

186 citations recorded by the source corpus.

Measurements of the $W^{\pm} \rightarrow \ell^{\pm} \nu$ and $Z \rightarrow \ell^+ \ell^-$ production cross sections (where $\ell^{\pm}=e^{\pm},\mu^{\pm}$) in proton-proton collisions at $\sqrt{s}=13$ TeV are presented using data recorded by the ATLAS experiment at the Large Hadron Collider, corresponding to a total integrated luminosity of 81 pb$^{-1}$ The total inclusive $W^{\pm}$-boson production cross sections times the single-lepton-flavour branching ratios are $\sigma_{W^+}^{tot}= 11.83 \pm 0.02 (stat) \pm 0.32 (sys) \pm 0.25 (lumi)$ nb and $\sigma_{W^-}^{tot} = 8.79 \pm 0.02 (stat) \pm 0.24 (sys) \pm 0.18 (lumi)$ nb for $W^+$ and $W^-$, respectively. The total inclusive $Z$-boson production cross section times leptonic branching ratio, within the invariant mass window $66<m_{\ell\ell}<116$ GeV, is $\sigma_{Z}^{tot} = 1.981 \pm 0.007 (stat) \pm 0.038 (sys) \pm 0.042 (lumi)$ nb. The $W^+$, $W^-$, and $Z$-boson production cross sections and cross-section ratios within a fiducial region defined by the detector acceptance are also measured. The cross-section ratios benefit from significant cancellation of experimental uncertainties, resulting in $\sigma_{W^+}^{fid}/\sigma_{W^-}^{fid} = 1.295 \pm 0.003 (stat) \pm 0.010 (sys)$ and $\sigma_{W^{\pm}}^{fid}/\sigma_{Z}^{fid} = 10.31 \pm 0.04 (stat) \pm 0.20 (sys)$. Theoretical predictions, based on calculations accurate to next-to-next-to-leading order for quantum chromodynamics and to next-to-leading order for electroweak processes and which employ different parton distribution function sets, are compared to these measurements.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6b0985665eb50a14686fdcce48a8f59694bdbb7a

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Citations in the corpus

Expression of interest for the CODEX-b detector (2019, unknown): “The EW production cross-sections used are σ(W → `ν) ' 20 nb and ∑j σ(Z → νjνj) ' 12 nb [76].”
Search for exclusive Higgs and Z boson decays to ϕγ and ργ with the ATLAS detector (2017, methodology): “For the upper limits on the branching fractions, the expected SM production cross section is assumed for the Higgs boson [15], while the ATLAS measurement of the inclusive Z boson cross section is used for the Z boson signal [55], as discussed in Section 3.”
Performance of the ATLAS trigger system in 2015 (2016, unknown): “The selection is similar to that of the W boson cross-section measurement [39], requiring exactly one lepton (electron or muon) with pT > 25 GeV, transverse mass mT > 50 GeV, and a single lepton trigger (24 GeV single-electron or 20 GeV singlemuon).”