An embedding technique to determine $\tau \tau$ backgrounds in proton-proton collision data

Abstract

An embedding technique is presented to estimate standard model $\tau \tau$ backgrounds from data with minimal simulation input. In the data, the muons are removed from reconstructed $\mu \mu$ events and replaced with simulated tau leptons with the same kinematic properties. In this way a set of hybrid events is obtained that does not rely on simulation except for the decay of the tau leptons. The challenges in describing the underlying event or the production of associated jets in the simulation are avoided. The technique described in this paper was developed for CMS. Its validation and the inherent uncertainties are also discussed. The demonstration of the performance of the technique is based on a sample of proton-proton collisions collected by CMS in 2017 at $\sqrt{s}=$ 13 TeV corresponding to an integrated luminosity of 41.5 fb${}^{-1}$.

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TAU-18-001 (CMS Public Pages)

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• Measurements of the Higgs boson production cross section and couplings in the W boson pair decay channel in proton-proton collisions at $\sqrt{s}$ = 13 TeV
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• Search for direct pair production of supersymmetric partners of $\tau$ leptons in the final state with two hadronically decaying $\tau$ leptons and missing transverse momentum in proton-proton collisions at $\sqrt{s}$ = 13 TeV
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• Constraints on anomalous Higgs boson couplings from its production and decay using the WW channel in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Search for charged lepton flavor violating Z and Z' boson decays in proton-proton collisions at $\sqrt{s}$ = 13 TeV
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