Analysis of the Quantum Numbers $J^{PC}$ of the X(3872) Particle
Analysis of the Quantum Numbers $J^{PC}$ of the X(3872) Particle
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DOI：
10.1103/physrevlett.98.132002
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发表时间：
2006-12
期刊：
影响因子：
--
通讯作者：
C. Collaboration
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文献类型：
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作者：
C. Collaboration
我们分析了排他衰变模式X(3872)→J/ψπ+π−与J/ψ→µ+µ−中X(3872)粒子的角分布和关联。我们使用了780PB−1的数据，这些数据来自p‘p碰撞，√S=1。96 TeV，用费米实验室的CDF II探测器收集。我们通过比较测量的衰变产物的角分布和对不同的J-ff假设的预测，得到了对X(3872)粒子的自旋、宇称和电荷共轭宇称的约束。指配J pc=1++和2−+是唯一与数据一致的。
We present an analysis of angular distributions and correlations of the X (3872) particle in the exclusive decay mode X (3872) → J/ψ π + π − with J/ψ → µ + µ − . We use 780 pb − 1 of data from p ¯ p collisions at √ s = 1 . 96 TeV collected with the CDF II detector at the Fermilab Tevatron. We derive constraints on spin, parity, and charge conjugation parity of the X (3872) particle by comparing measured angular distributions of the decay products with predictions for different J PC hypotheses. The assignments J PC = 1 ++ and 2 − + are the only ones consistent with the data.