PoS - Proceedings of Science
Volume 291 - 9th International Workshop on the CKM Unitarity Triangle (CKM2016) - WG 2 Parallel
$D^*$ and $\tau$ polarization measurements by Belle
K. Adamczyk* On behalf of the BELLE Collaboration
*corresponding author
Full text: pdf
Pre-published on: June 05, 2017
Published on: June 13, 2017
Abstract
Semitauonic $\bar{B} \to D^{(*)} \tau \bar{\nu_{\tau}}$ decays provide a wide variety of observables sensitive to new physics contributions, such as differential distributions and polarizations. Of particular interest is $\tau$ polarization, that cannot be accessed in other semileptonic decays. Furthermore $D^{*}$ polarization can be measured fairly accurately, so it can be good discriminant of some new physics scenarios. Correlations between various observables offer a rich laboratory to investigate the structure of interactions in semitauonic $B$ decays. In this report, preliminary results on the first measurement of $\tau$ polarization and prospects for the $D^*$ polarization measurements are presented.
DOI: https://doi.org/10.22323/1.291.0052
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