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First measurement of the strange quark asymmetry at the Z0 peak

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Zeitschrift für Physik C Particles and Fields

Abstract

A measurement of the strange quark forward-backward asymmetry at the Z0 peak was performed using 718,000 multihadronic Z0 decays collected by the DELPHI detector at LEP in 1992. Thes-quark was tagged by the presence of high momentum charged kaons identified by the Ring Imaging Cherenkov detector and byΛ 0;s decaying intopπ. Thes-quark purity obtained was estimated for the two hadrons to be 43%. The averages-quark asymmetry was found to be 0.131±0.035 (stat.) ±0.013 (syst.). The forward-backward asymmetry was measured for unresolvedd-ands-quarks, tagged by the detection of a high energy neutron or neutral kaon in the Hadron Calorimeter. The combinedd-ands-quark purity was 69% and their asymmetry was found to be 0.112±0.031 (stat.) ±0.054 (syst.).

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DELPHI Collaboration., Abreu, P., Adam, W. et al. First measurement of the strange quark asymmetry at the Z0 peak. Z. Phys. C - Particles and Fields 67, 1–13 (1995). https://doi.org/10.1007/BF01564817

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  • DOI: https://doi.org/10.1007/BF01564817

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