标题： 对美粒子重子衰变到$D^0 p h^-$和$Λ_c^+ h^-$最终态的研究 显示英文标题

标题： Studies of beauty baryon decays to $D^0 p h^-$ and $Λ_c^+ h^-$ final states

摘要： 底重子衰变到$D^0 p h^-$和$\Lambda_c^+ h^-$最终态（其中$h$表示一个介子或一个奇异介子）是在一个$pp$碰撞的数据样本中研究的，对应的积分亮度为 1.0 fb$^{-1}$，由 LHCb 探测器收集。 卡比博抑制衰变$\Lambda_b^0\to D^0 p K^-$和$\Lambda_b^0\to \Lambda_c^+ K^-$被观察到，并且它们的分支分数相对于衰变$\Lambda_b^0\to D^0 p \pi^-$和$\Lambda_b^0\to \Lambda_c^+ \pi^-$进行了测量。 此外，首次报告了中性底-奇重子$\Xi_b^0$衰变为$D^0 p K^-$最终态的衰变，并对$\Xi_b^0$的质量进行了测量。 $\Xi_b^0\to \Lambda_c^+ K^-$衰变的证据也已被报告。 显示英文摘要

摘要： Decays of beauty baryons to the $D^0 p h^-$ and $\Lambda_c^+ h^-$ final states (where $h$ indicates a pion or a kaon) are studied using a data sample of $pp$ collisions, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb detector. The Cabibbo-suppressed decays $\Lambda_b^0\to D^0 p K^-$ and $\Lambda_b^0\to \Lambda_c^+ K^-$ are observed and their branching fractions are measured with respect to the decays $\Lambda_b^0\to D^0 p \pi^-$ and $\Lambda_b^0\to \Lambda_c^+ \pi^-$. In addition, the first observation is reported of the decay of the neutral beauty-strange baryon $\Xi_b^0$ to the $D^0 p K^-$ final state, and a measurement of the $\Xi_b^0$ mass is performed. Evidence of the $\Xi_b^0\to \Lambda_c^+ K^-$ decay is also reported.