Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-03-23
Phys.Rev.D50:4447-4453,1994
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, latex, 3 tables and no figures, PRL-TH-94/7, UNIL-TP-2/94
Scientific paper
10.1103/PhysRevD.50.4447
We show that certain CP-odd momentum correlations in the production and subsequent decay of tau pairs in $e^+e^-$ collisions get enhanced when the electron beam is longitudinally polarized. Analytic expressions for these correlations are obtained when $\tau^+\tau^-$ have a ``weak" dipole form factor (WDFF) coupling to $Z$ in the case of two-body decay modes of the $\tau$. Expressions of the variance of these correlations due to the standard model interactions are also presented. For $e^+e^-$ collisions at the $Z$ peak, a sensitivity of about $10^{-17} e$ cm for the real part of the $\tau$ WDFF and $3\times 10^{-17} e$ cm for the imaginary part of the $\tau$ WDFF can be reached using $\pi$ and $\rho$ channels (which are the most sensitive channels) in $\tau$ decay, with $10^6\, Z$'s likely to be available at the SLC at Stanford with $e^-$ polarization of 62\%-75\%.
Ananthanarayan Balasubramanian
Rindani Saurabh D.
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