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2013-01

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cc-by (c) The LHCb Collaboration, 2013
Please use this identifier to cite or link to this item: 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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http://dx.doi.org/10.1007/JHEP01(2013)111

Abstract

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.

Subject

Hadrons, Teoria quàntica de camps, Gravitació, Teoria quàntica, Relativitat (Física)

Subject (English)

Hadrons, Quantum field theory, Gravitation, Quantum theory, Relativity (Physics)

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

Citation

ABELLAN BETETA, Carlos, et al. 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, num. 111, pags. 1-19. ISSN 1126-6708. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/56284

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