${\rm Y}(nl)$ decay into $B^{(\ast )}{\bar{B}}^{(\ast )}$

Abstract

We have evaluated the decay modes of the ${\rm Y}(4s),{\rm Y}(3d),{\rm Y}(5s),{\rm Y}(6s)$ states into $B\bar{B},B{\bar{B}}^{\ast }+c.c.,B^{\ast }{\bar{B}}^{\ast },B_s{\bar{B}}_s,B_s{\bar{B}}_s^{\ast }+c.c.,B_s^{\ast }{\bar{B}}_s^{\ast }$ using the ${}^3{P}_0$ model to hadronize the $b\bar{b}$ vector seed, fitting some parameters to the data. We observe that the ${\rm Y}(4s)$ state has an abnormally large amount of meson-meson components in the wave function, while the other states are largely $b\bar{b}$. We predict branching ratios for the different decay channels which can be contrasted with experiment for the case of the ${\rm Y}(5s)$ state. While globally the agreement is fair, we call the attention to some disagreement that could be a warning for the existence of more elaborate components in the state.

arXiv comment6 pages, 3 figures, 9 tables; V2: New discussions and references added, version to appear in Phys. Lett. B

References in corpus (16)

• Constituent quark model study of the meson spectra
• From controversy to precision on the sigma meson: a review on the status of the non-ordinary $f_0(500)$ resonance
• Bottomonium Mesons and Strategies for Their Observation
• Bottomonium spectrum revisited
• Higher mass bottomonia
• Measurement of the e+e- --> b anti-b cross section between sqrt(S)=10.54 and 11.20 GeV
• Higher bottomonium zoo
• Heavy quark spin symmetry breaking in near-threshold $J^{PC}=1^{--}$ quarkonium-like resonances
• Vector hidden-bottom tetraquark candidate: $Y(10750)$
• Isospin violation in e+ e- --> B Bbar
• Line-shape and poles of the $\psi (3770)$
• Production of hadron pairs in electron-positron annihilation near the K(+)K(-), D-Dbar, B-Bbar and Lambda(c)(+)-Lambda(c)(-) thresholds
• Generalized screened potential model
• A plausible explanation of ${\rm Y}(10860)$
• Line shape and $D^{(\ast )}{\bar{D}}^{(\ast )}$ probabilities of $\psi (3770)$ from the $e^{+}{e}^{-}\to D\bar{D}$ reaction
• Three body open flavor decays of higher charmonium and bottomonium

Cited by in corpus (17)

• Computation of the quarkonium and meson-meson composition of the ${\rm Y}(nS)$ states and of the new ${\rm Y}(10753)$ Belle resonance from lattice QCD static potentials
• Modern meson spectroscopy: the fundamental role of unitarity
• Observation of $e^{+}{e}^{-}\to \omega {\chi }_{bJ}(1P)$ and search for $X_b\to \omega {\rm Y}(1S)$ at $\sqrt{s}$ near 10.75 GeV
• Heavy hybrid decays to quarkonia
• Study of $I=0$ bottomonium bound states and resonances in $S$, $P$, $D$ and $F$ waves with lattice QCD static-static-light-light potentials
• \boldmath{${\rm Y}$} and \boldmath{${\eta }_b$} mass shifts in nuclear matter
• Coulomb effects in the decays ${\rm Y}(4S)\to B\bar{B}$
• Hidden-bottom hadronic transitions of ${\rm Y}(10753)$
• Status and Prospects of Exotic Hadrons at Belle II
• Invariant-mass spectrum of $\Lambda \bar{\Lambda }$ pair in the process $e^{+}{e}^{-}\to \varphi \Lambda \bar{\Lambda }$
• Phase shifts of the light pseudoscalar meson and heavy meson scattering in heavy meson chiral perturbation theory
• Predictions for Bottomonium from a Relativistic Screened Potential Model
• Strong decays of the lowest bottomonium hybrid within an extended Born-Oppenheimer framework
• Search for $e^{+}{e}^{-}\to \gamma {\chi }_{bJ}$ ($J$ = 0, 1, 2) near $\sqrt{s}=10.746$ GeV at Belle II
• Improved measurement of Born cross sections for ${\chi }_{bJ}\omega$ and ${\chi }_{bJ}({\pi }^{+}{\pi }^{-}{\pi }^0{)}_{\mathrm{non}-\omega }$ ($J$ = 0, 1, 2) at Belle and Belle II
• Exotic hadrons associated with $b$-quark
• Hidden-bottom hadronic decays of ${\rm Y}(10753)$ with a ${\eta }^{(\prime )}$ or $\omega$ emission