Title of article
Measurement of the transverse spin correlations in the decay Z → τ+τ−
Author/Authors
ALEPH Collaboration، نويسنده , , R Barate، نويسنده , , D Buskulic، نويسنده , , D Decamp، نويسنده , , P Ghez، نويسنده , , C Goy، نويسنده , , J.-P Lees، نويسنده , , A Lucotte، نويسنده , , M.-N Minard، نويسنده , , Nief، Francois نويسنده , , B Pietrzyk، نويسنده , , M.P. Casado، نويسنده , , M. Chmeissani، نويسنده , , P Comas، نويسنده , , J.M. Crespo، نويسنده , , M Delfino، نويسنده , , E Fernandez، نويسنده , , M. Fernandez-Bosman، نويسنده , , Ll. Garrido، نويسنده , , A Juste، نويسنده , , et al.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1997
Pages
11
From page
191
To page
201
Abstract
For τ leptons produced in e+e− → τ+τ− interactions there are, in addition to the longitudinal spin correlations, two independent transverse spin correlations associated with the transverse (within the production plane) and normal (to the production plane) polarization components. A measurement of the transverse-transverse and transverse-normal τ spin correlations in the decay Z → τ+τ−, CTT and CTN, is presented based on the aplanarity angle of the decay products of both τ leptons. Using 80 pb−1 of data collected by ALEPH on the peak of the Z resonance, the results are CTT = 1.06±0.13 (stat) ±0.05(syst), and CTN = 0.08±0.13(stat)±0.04(syst). These values are in agreement with the Standard Model predictions, CTT = 0.99 and CTN = −0.01.
Journal title
PHYSICS LETTERS B
Serial Year
1997
Journal title
PHYSICS LETTERS B
Record number
908498
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