Speaker
Thomas Kuhr
(Institut fuer Theoretische Teilchenphysik)
Description
We report on the progress of the analysis of $B0_s \to J/\psi \phi$
decays to extract the parameters $\Delta \Gamma_s / \Gamma_s$ and $\sin 2
\beta_s$ with the CDF\,II detector. The
use of a time-dependent angular analysis can separate the $CP$~eigenstates
of the $B0_s$~meson to determine their separate lifetimes. Further
tagging of the $B0_s$ meson at time $t=0$ as $B0_s$ or $\bar{B}^0_s$,
allows for the analysis of the $CP$ asymmetry, which then yields the $\sin
2 \beta_s$ parameter. The $\Delta \Gamma_s$ measurement is an improved
analysis using additional data, neural network selection for better
signal/background, and reduced systematic errors.
Author
Thomas Kuhr
(Institut fuer Theoretische Teilchenphysik)
Co-author
CDF Collaboration
