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arXiv · 2005.08764

The X(3872) tetraquarks in B and B_s decays

Luciano Maiani·Antonio D. Polosa·Veronica Riquer
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Abstract

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 quasi-degenerate, 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^pm, 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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Luciano Maiani, Antonio D. Polosa, Veronica Riquer. 2020-05-18. The X(3872) tetraquarks in B and B_s decays. https://doi.org/10.1103/physrevd.102.034017

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