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We consider the production of tau pairs by electron-positron colliding beamsat the maximum cross section near the threshold. At this energy tau pairs areproduced mostly in the s-wave which implies that the spin of the tau pairs arealmost always pointing in the beam direction independent of the productionangle. When both electrons and positrons are longitudinally polarized in thesame direction, for example 90%, one can obtain tau pairs with 99% polarizationin the direction of the polarization vectors of the incident beams. Tests of CPviolation and study of the structure of weak interactions using such polarizedtau pairs are discussed.Comment: 30 pages, 5 figures, uuencoded file, SLAC-PUB-668

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Production of polarized τ pairs and tests of<i>CP</i>violation using polarized<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">e</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>colliders near threshold

Production of polarized τ pairs and tests ofCPviolation using polarizede±colliders near threshold