Precise measurement of the lifetime of the tau lepton.
نویسندگان
چکیده
Data accumulated with a high-precision vertex drift chamber operating in the PEP detector MAC are used for a precise measurement of the lifetime of the T lepton. Results from a decay-length analysis of a sample in which one T decays into one charged particle and the other to three charged particles are combined with those from an impact-parameter analysis of an independent sample of events that includes both oneand three-prong tau decays. We find rT =0.309 f 0.019 ps, in agreement with the prediction from the measured leptonic branching ratio and r-p universality. PACS numbers: 14.6O.Jj, 13.35.+s
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ورودعنوان ژورنال:
- Physical review letters
دوره 59 4 شماره
صفحات -
تاریخ انتشار 1987