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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/56284
A study of the Z production cross-section in pp collisions at s√=7 TeV using tau final states
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A measurement of the inclusive Z → ττ cross-section in pp collisions at s√=7TeV is presented based on a dataset of 1.0 fb−1 collected by the LHCb detector. Candidates for Z → τ τ decays are identified through reconstructed final states with two muons, a muon and an electron, a muon and a hadron, or an electron and a hadron. The production cross-section for Z bosons, with invariant mass between 60 and 120 GeV/c 2, which decay to τ leptons with transverse momenta greater than 20 GeV/c and pseudorapidities between 2.0 and 4.5, is measured to be σ pp→Z→ττ = 71.4 ± 3.5 ± 2.8 ± 2.5 pb; the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the integrated luminosity. The ratio of the cross-sections for Z → τ τ to Z → μμ is determined to be 0.93 ± 0.09, where the uncertainty is the combination of statistical, systematic, and luminosity uncertainties of the two measurements.
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ABELLAN BETETA, Carlos, CALVO GÓMEZ, Míriam, CAMBONI, Alessandro, COMERMA MONTELLS, Albert, DOMINGO BONAL, Francesc, GARRIDO BELTRÁN, Lluís, GRABALOSA GÁNDARA, Marc, GRACIANI DÍAZ, Ricardo, GRAUGÉS POUS, Eugeni, LÓPEZ ASAMAR, Elias, PÉREZ-CALERO YZQUIERDO, Antonio, PICATOSTE OLLOQUI, Eduardo, PIE VALLS, B. (blai), POTTERAT, Cédric, RIVES MOLINA, Vicente josé, RUIZ, Hugo (ruiz pérez), VÁZQUEZ GÓMEZ, Ricard, VILASIS-CARDONA, Xavier, LHCb Collaboration. A study of the Z production cross-section in pp collisions at s√=7 TeV using tau final states. _Journal of High Energy Physics_. 2013. Vol. 1301, núm. 111, pàgs. 1-19. [consulta: 1 de febrer de 2026]. ISSN: 1126-6708. [Disponible a: https://hdl.handle.net/2445/56284]