The X(3872) tetraquarks in B and B_s decays
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.
Cite
@article{arxiv.2005.08764,
title = {The X(3872) tetraquarks in B and B_s decays},
author = {Luciano Maiani and Antonio D. Polosa and Veronica Riquer},
journal= {arXiv preprint arXiv:2005.08764},
year = {2020}
}
Comments
5 pages, 2 figures, to appear in PRD. Slightly extended, references added, one figure updated