Search for $XYZ$ states in $\Lambda_b$ decays at the LHCb
Autor: | Hsiao, Y. K., Geng, C. Q. |
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Rok vydání: | 2016 |
Předmět: | |
Zdroj: | Phys. Lett. B 757 (2016) 47-49 |
Druh dokumentu: | Working Paper |
DOI: | 10.1016/j.physletb.2016.03.055 |
Popis: | We consider $X(3872)$ and $Y(4140)$ as the vector tetraquark states of $X_c^0\equiv c\bar c u\bar u(d\bar d)$ and $c\bar c s\bar s$, respectively. By connecting $\Lambda_b\to X_c^0\Lambda$ to $B^-\to X_c^0 K^-$, we predict that the branching ratios of $\Lambda_b\to \Lambda(X(3872)^0\to) J/\psi \pi^+\pi^-$ and $\Lambda_b\to \Lambda(Y(4140)\to) J/\psi \phi$ are $(5.2\pm 1.8)\times 10^{-6}$ and $(4.7\pm 2.6)\times 10^{-6}$, which are accessible to the experiments at the LHCb, respectively. The measurements of these $\Lambda_b$ modes would be the first experimental evidences for the $XYZ$ states in baryonic decays. Comment: 7 pages, 1 figures |
Databáze: | arXiv |
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