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arXiv 0709.4555hep-ex
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CDF上无粲B衰变模的分支分数和直接CP不对称性

Branching Fractions and Direct CP Asymmetries of Charmless B Decay Modes at CDF

CDF Collaboration, Michal Kreps

摘要:

我们提出了新的CDF结果的分支分数和时间积分直接CP不对称的$B^0$和$B^0_s$衰变模式到对无粲带电强子(π介子或K介子)。本次更新的数据集相当于1 $\mathrm{fb}^{-1}$的$p\bar p$碰撞,质心能量为1.96 $\mathrm{TeV}$。我们报告的$B_s \to K^- π^+$模式和测量其分支分数和直接CP不对称的第一次观察。我们还首次观察到了$Λ_b^0$重子的两个无粲衰变:$Λ_b^0 \to pπ^-$和$Λ_b^0 \to pK^-$ .

英文摘要:

We present new CDF results on the branching fractions and time-integrated direct CP asymmetries for $B^0$ and $B^0_s$ decay modes into pairs of charmless charged hadrons (pions or kaons). The data-set for this update amounts to 1 $\mathrm{fb}^{-1}$ of $p\bar p$ collisions at a center of mass energy 1.96 $\mathrm{TeV}$. We report the first observation of the $B_s \to K^- π^+$ mode and a measurement of its branching fraction and direct CP asymmetry. We also observe for the first time two charmless decays of the $Λ_b^0$-baryon: $Λ_b^0 \to pπ^-$ and $Λ_b^0 \to pK^-$.

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。

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