Observation of a New Excited D_{s}^{+} Meson in B^{0}?D^{-}D^{+}K^{+}p^{-} Decays.
Observation of a New Excited D_{s}^{+} Meson in B^{0}?D^{-}D^{+}K^{+}p^{-} Decays.
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B^{0}?D^{-}D^{ }K^{ }p^{-} 衰变中新激发 D_{s}^{ } 介子的观察。
DOI：
10.1103/physrevlett.126.122002
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发表时间：
2021
影响因子：
8.6
通讯作者：
Aaij R
中科院分区：
文献类型：
--
作者：
Aaij R
利用LHCb探测器在质心能量为13TeV时收集的积分光度对应的碰撞数据，研究了衰变过程。观察到一个新的激发介子衰变到具有统计意义的末态。新态的磁极质量和宽度，以及自旋宇称用振幅分析测量为，和，其中第一个不确定度是统计的，第二个是系统的。还报告了振幅分析中所有分量的拟合分数。新的共振，表示为，是一个强有力的候选者是状态，径向激发的赝标量基态。
Usingcollision data corresponding to an integrated luminosity ofcollected with the LHCb detector at a center-of-mass energy of 13 TeV, thedecay is studied. A new excitedmeson is observed decaying into thefinal state with large statistical significance. The pole mass and width, and the spin parity of the new state are measured with an amplitude analysis to be,, and, where the first uncertainty is statistical and the second systematic. Fit fractions for all components in the amplitude analysis are also reported. The new resonance, denoted as, is a strong candidate to be thestate, the radial excitation of the pseudoscalar ground-statemeson.