Recent Results from the Mark Ii Experiment+
نویسنده
چکیده
The Mark II experiment first started taking data in 1978 at the SLAC SPEAR storage ring. It was the first e+edetector with a large, many layer cylindrical drift chamber (CDC) and a large liquid argon calorimeter!” After two years at SPEAR, it was moved to the PEP storage ring, where it was upgraded a year later with a seven layer precision vertex drift chamber!’ located between the CDC and the beampipe, for the study of particle lifetimes. In this configuration (hereafter referred to as PEP5), it took 205 pb-’ of data at & = 29 GeV over three years. Among the many Mark II contributions to particle physics at PEP were the study of inclusive lepton production and measurements of the lifetimes of heavy particles (D mesons, B hadrons, and the T lepton).
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