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Brandelik, R.; Braunschweig, W.; Gather, K.; Kadansky, V.; Luebelsmeyer, K.; Maettig, P.; Martyn, H.U.; Peise, G.; Rimkus, J.; Sander, H.G.
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)1980
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)1980
AbstractAbstract
[en] We have observed tau production in e+e- annihilation at centre of mass energies between 12 and 31.6 GeV with cross sections in agreement with the Q.E.D. tau-pair cross section. Branching ratios for tau decay have been measured and are consistent with the world averages. We have determined the cutoff parameters of Q.E.D. Λsub(+) (Λsub(-)) to be > 67 GeV (74 GeV) and have obtained an upper limit on the tau lifetime of 1.4 x 10-12 sec (95% C.L.). (orig.)
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Feb 1980; 8 p
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Report
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Numerical Data
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