Measurement of the T Lifetime
نویسنده
چکیده
2. Method. Tau leptons are pair-produced in e+eannihilations, so each tau has the known beam energy. Thus we can measure the lifetime by determining the average decay length of the taus; at PEP energies, Ec, =29 GeV, it is expected to be about 700 p. The decay length can be measured when the tau decays in the three-chargedprong topology. It is simply the distance between the production point, i.e. the beam position, and the position of the decay vertex. exploited by several PEP and PETBA experiments.2-5 This same technique has been
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