X (3872) tetraquarks in B and Bs decays

被引：14
|
作者：
Maiani, Luciano [1 ]
Polosa, Antonio D.
Riquer, Veronica
机构：
[1] Sapienza Univ Roma, Dipartimento Fis, Piazzale Aldo Moro 2, I-00185 Rome, Italy
来源：
PHYSICAL REVIEW D | 2020年 / 102卷 / 03期
关键词：
D O I：
10.1103/PhysRevD.102.034017
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We discuss how the latest data on X(3872) in B and B-s decays speak about its tetraquark nature. The established decay pattern, including the up-to-date observations by CMS, are explained by the mixing of two quasidegenerate, unresolvable neutral states. The same mechanism also explains isospin violations in X decays and strongly suggests that the lurking charged partners are required to have very small branching fractions in J/psi rho +/-, well below the current experimental limits. In addition, a new prediction on the decay into J/psi omega final states is attained. The newest experimental observations are found to give thrust to the simplest tetraquark picture and call for a definitive, in-depth study of final states with charged rho mesons.
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页数：5
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