Measuring $β$ in $B \to D^{*+}D^{*-}K_s$ Decays

Details Measuring $β$ in $B \to D^{*+}D^{*-}K_s$ Decays Measuring $β$ in $B \to D^{*+}D^{*-}K_s$ Decays

1999-05-20

arxiv.org/abs/hep-ph/9905425v4

Phys.Rev. D61 (2000) 054009

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revtex, 28 pages, 7 figures, title changed, introduction expanded, added references, details of calculations moved to the appe

Scientific paper

10.1103/PhysRevD.61.054009

We consider the possibility of measuring both $\sin (2 \beta)$ and $\cos (2 \beta)$ in the KM unitarity triangle using the process $B^0 \to D^{*+}D^{*-}K_s$. This decay mode has a higher branching fraction (O(1%)) than the mode $B^0 \to D^{*+}D^{*-}$. We use the factorization assumption and heavy hadron chiral perturbation theory to estimate the branching fraction and polarization. The time dependent rate for $B^0(t) \to D^{*+} D^{*-} K_s$ can be used to measure $\sin (2 \beta)$ and $\cos(2 \beta)$ . Furthermore, examination of the $D^{*+} K_s$ mass spectrum may be the best way to experimentally find the broad $1^+$ p-wave $D_s$ meson.

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