Study of B - ? D K - p + p - and B - ? D p - p + p - decays and determination of the CKM angle ?
Study of B - ? D K - p + p - and B - ? D p - p + p - decays and determination of the CKM angle ?
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研究B-？
DOI：
10.1103/physrevd.92.112005
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发表时间：
2015
影响因子：
5
通讯作者：
Aaij R
中科院分区：
文献类型：
--
作者：
Aaij R
我们报道了一个被抑制的和有利的衰变的研究，其中中性介子通过它的衰变到和-偶和末态被检测到。测量是使用LHCb实验收集的质子-质子碰撞数据样本进行的，对应于积分光度。我们观察到的第一个显着的信号，甚至在最后状态的theson的抑制和favoredmode，以及在双Cabibbo抑制的最后状态的thedecay。证据的抑制衰变，与，也提出。从观测到的产率和它们的电荷共轭衰变模式中，弱相位的最可能值对应于。这是迄今为止最精确的单次测量测定之一。
We report a study of the suppressedand favoreddecays, where the neutralmeson is detected through its decays to theand-evenandfinal states. The measurement is carried out using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of. We observe the first significant signals in the-even final states of themeson for both the suppressedand favoredmodes, as well as in the doubly Cabibbo suppressedfinal state of thedecay. Evidence for the suppressed decay, with, is also presented. From the observed yields in the,and their charge conjugate decay modes, the most probable value of the weak phasecorresponds to. This is one of the most precise single-measurement determinations ofto date.