Measurements of Tau Lepton Production and Decay

We have studied 419 τ pair events produced in the reactione+e−→τ+ τ− at a c.m. energy of 34.6 GeV. We measure the cross section and angular distribution, as well as the decay branching ratios. The production characteristics are consistent with the Standard Electroweak Model predictions of γ andZ0 interference. The branching ratios are generally consistent with the τ decaying according to standard weak interaction principles, but we observe somewhat more decays resulting in single charged hadrons plus neutrals than are predicted by present theory.

ELECTRON POSITRON: COLLIDING BEAMS
COLLIDING BEAMS: ELECTRON POSITRON
ELECTRON POSITRON: EXCLUSIVE REACTION
ELECTRON POSITRON: ANNIHILATION
ANNIHILATION: ELECTRON POSITRON
TAU: ELECTROPRODUCTION
ELECTROPRODUCTION: TAU
TAU: PAIR PRODUCTION
PAIR PRODUCTION: TAU
TAU: LEPTONIC DECAY

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