Studies of CP-conserving and CP-violating Bs mixing parameters with the D0 experiment
Abstract
Description
This paper summarises the recent results of the Run IIa D0 experiment at the Tevatron Collider at Fermilab on the observable parameters of the $B_{s}$ meson. A measurement of the branching fraction $B_s->D_s^{(*)}D_s^{(*)}$ is reported, which provides an estimate of the width difference $ΔΓ_{s}^{CP}/ΔΓ_{s}$. Through the decay $B_{s} \to J/ψϕ$ the width difference $ΔΓ_{s}$ is extracted, and for the first time a constraint is set on the CP-violating phase $ϕ_{s}$, although a four-fold ambiguity remains. This result is combined with other D0 measurements to yield $ΔΓ_{s}=0.13\pm0.09 {\rm ps^{-1}}$, $ϕ_{s} = -0.70^{+0.47}_{-0.39}$.
Submitted for the SUSY07 proceedings
Submitted for the SUSY07 proceedings