An embedding technique to determine ꚍꚍ backgrounds in proton-proton collision data
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AuthorSirunyan, A. M.; Cabrillo Bartolomé, José Iban; Calderón Tazón, Alicia; Chazin Quero, Bárbara; Duarte Campderros, Jorge; Fernández García, Marcos; Fernández Manteca, Pedro José; García Alonso, Andrea; García Ferrero, Juan; Gómez Gramuglio, Gervasio; López Virto, María Amparo; Marco de Lucas, Jesús; Martínez Rivero, Celso; Martínez Ruiz de Árbol, Pablo; Matorras Weinig, Francisco; Piedra Gómez, Jonatan; Prieels, Cedric Gerald; Rodrigo Anoro, Teresa; Ruiz Jimeno, Alberto; [et al.]
An embedding technique is presented to estimate standard model ττ backgrounds from data with minimal simulation input. In the data, the muons are removed from reconstructed μμ 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 √s=13 TeV corresponding to an integrated luminosity of 41.5 fb−1.
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