A study of the Z production cross-section in pp collisions at √s = 7 using tau final states
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13130_2013_Article_5448.pdf
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Author(s)
Aaij, R.
Beteta, C. A
Adametz, A.
Adeva, B.
Adinolfi, M.
Adrover, C.
Affolder, A.
Ajaltouni, Z.
Albrecht, J.
Alessio, F.
Date Issued
January 2013
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
The LHCb collaboration et al. “A Study of the Z Production Cross-Section in Pp Collisions at √=7 TeV Using Tau Final States.” Journal of High Energy Physics 2013.1 (2013): n. pag. © 2013 CERN for the benefit of the LHCb collaboration
Version
Final published version
Abstract
A measurement of the inclusive Z → ττ cross-section in pp collisions at
√s =7 is presented based on a dataset of 1.0 fb[superscript −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[superscript 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[subscript 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP01(2013)111
