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τ weak dipole moments from azimuthal asymmetries

✍ Scribed by J. Vidal; J. Bernabéu; G. González-Sprinberg

Book ID
104355891
Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
550 KB
Volume
76
Category
Article
ISSN
0920-5632

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✦ Synopsis

We show that transverse and normal single-tau polarization of tau pairs produced at e + e-unpolarized collisions, at the Z peak, are sensitive to weak (magnetic and electric) dipole moments of the tau. We also show how these components of the ~-polarization are accessible by measuring appropriate azimuthal asymmetries in the angular distribution of its decay products. Sensitivities of the order of 10 -is e .cm, for the weak-electric dipole moment, and 10 -4 (10-3), for the real (imaginary) part of the weak-magnetic dipole moment of T, may be achieved. Compatible bounds are also presented from spin-spin correlated asymmetries.

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