First observation of the rare B + ? D + K + p - decay
First observation of the rare B + ? D + K + p - decay
复制标题
第一次观察罕见的 B ？
DOI：
10.1103/physrevd.93.051101
复制
发表时间：
2016
影响因子：
5
通讯作者：
Aaij R
中科院分区：
文献类型：
--
作者：
Aaij R
在2011年和2012年期间LHCb实验记录的碰撞数据对应的数据样本中观察到衰变。信号显著性为，分支分数为B（B+→D+K+π-）=（5.31±0.90±0.48±0.35）×10-6，其中不确定度分别为统计不确定度、系统不确定度和归一化不确定度。达利茨图似乎是由广泛的结构。角分布被用来寻找准两体衰变的贡献。未观察到显著信号，并对其支化分数设定上限。
Thedecay is observed in a data sample corresponding toofcollision data recorded by the LHCb experiment during 2011 and 2012. The signal significance isand the branching fraction is measured to be B(B+→D+K+π-)=(5.31±0.90±0.48±0.35)×10-6, where the uncertainties are statistical, systematic and due to the normalization mode, respectively. The Dalitz plot appears to be dominated by broad structures. Angular distributions are exploited to search for quasi-two-body contributions fromanddecays. No significant signals are observed and upper limits are set on their branching fractions.