Observation of the Decay ?_{b}^{-}?pK^{-}K^{-}.

Observation of the Decay ?_{b}^{-}?pK^{-}K^{-}.
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衰变的观察?_{b}^{-}?pK^{-}K^{-}。

DOI:
10.1103/physrevlett.118.071801
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发表时间:
2017
影响因子:
8.6
通讯作者:
Aaij R
Aaij R
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Aaij R

文献摘要

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使用 LHCb 探测器来寻找重子衰变到无魅力的最终状态(其中表示 kaon 或 pion)。该分析基于在质心能量和 8 TeV 处收集的质子-质子碰撞数据样本,对应于积分光度。观察到的衰减具有 8.7 个标准差的显着性,并且发现了 3.4 个标准差水平的衰减证据。相对于归一化通道,报告了分支分数和强子产生分数的产物的结果。还测量了腐烂的支化分数以及相对于腐烂的支化分数。
Decays of theandbaryons to the charmless final states, wheredenotes a kaon or pion, are searched for with the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energiesand 8 TeV, corresponding to an integrated luminosity of. The decayis observed with a significance of 8.7 standard deviations, and evidence at the level of 3.4 standard deviations is found for thedecay. Results are reported, relative to thenormalization channel, for the products of branching fractions and-hadron production fractions. The branching fractions ofandrelative todecays are also measured.