6533b858fe1ef96bd12b6379
RESEARCH PRODUCT
Normal and transverse single tau polarization at the Z-peak
G.a. González-sprinbergG.a. González-sprinbergJ. VidalJ. VidalJose BernabeuJose Bernabeusubject
PhysicsNuclear and High Energy PhysicsElectron–positron annihilationmedia_common.quotation_subjectTransition dipole momentFísicaObservablePolarization (waves)AsymmetryNuclear physicsTransverse planeDipoleCP violationAtomic physicsParticle Physics - Phenomenologymedia_commondescription
Abstract We study normal (to the collision plane) and transverse (within the collision plane) single-τ polarization in τ pairs produced in e + e − unpolarized collisions at the Z -resonance. The transverse polarization component is sensitive to the anomalous weak-magnetic moment, whereas the normal polarization component is sensitive to a CP-violating weak-electric dipole moment. We show how these components of the single τ polarization are accessible from the angular distribution of its decay products. We define a CP violating asymmetry of the τ decay products which, with 10 7 Z ′s produced, provides a sensitivity of 2.3 × 10 −18 e ·cm for the weak-electric dipole moment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-01-01 | Physics Letters B |