Observation of an a0-like State with Mass of 1.817 GeV in the Study of D+ s → K0 SK+ π0 Decays
Observation of an a0-like State with Mass of 1.817 GeV in the Study of D+ s → K0 SK+ π0 Decays
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D s ≤ K0 SK ≤ 0 衰变研究中质量为 1.817 GeV 的类 a0 态的观测
DOI：
10.1103/physrevlett.129.182001
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
BESIII Collaboration
中科院分区：
文献类型：
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作者：
BESIII Collaboration
利用BESIII探测器在质心能量为4.178 - 4.226 GeV之间收集的积分光度数据，我们对衰变进行了第一次振幅分析，并确定了中间过程的相对分支分数和相位。我们首次观测到了质量为1.817GeV的类原子态衰变到。此外，我们测量比率{B[Ds+→K *（892）0 K +]/B[Ds+→K 0 K *（892）+]}为。最后给出了绝对分支率B（Ds+→ KS 0 K +π0）=（1.46±0.06stat±0.05syst）%的精确测量值。
Usingannihilation data corresponding to an integrated luminosity ofcollected at center-of-mass energies between 4.178 and 4.226 GeV with the BESIII detector, we perform the first amplitude analysis of the decayand determine the relative branching fractions and phases for intermediate processes. We observe an-like state with mass of 1.817 GeV in its decay tofor the first time. In addition, we measure the ratio {B[Ds+→K¯*(892)0K+]/B[Ds+→K¯0K*(892)+]} to be. Finally, we provide a precision measurement of the absolute branching fraction B(Ds+→KS0K+π0)=(1.46±0.06stat±0.05syst)%.