用D0实验研究CP守恒和CP破坏的Bs混合参数
Studies of CP-conserving and CP-violating Bs mixing parameters with the D0 experiment
摘要：
本文总结了在费米实验室Tevatron对撞机上进行的Run Ⅱ a D 0实验对$B_{s}$介子可观测参数的最新结果。报告了支化分数$B_s->D_s^{(*)}D_s^{(*)}$的测量，其提供了宽度差$ΔΓ_{s}^{CP}/ΔΓ_{s}$的估计。通过衰减$B_{s} \to J/ψϕ$，提取宽度差$ΔΓ_{s}$，并且第一次对CP违反相位$ϕ_{s}$设置约束，尽管仍然存在四重模糊度。将该结果与其他D0测量值结合，得到$ΔΓ_{s}=0.13\pm0.09 {\rm ps^{-1}}$、$ϕ_{s} = -0.70^{+0.47}_{-0.39}$。
英文摘要：
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 $ΔΓ_{s}=0.13\pm0.09 {\rm ps^{-1}}$, $ϕ_{s} = -0.70^{+0.47}_{-0.39}$.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
