Investigations on the light hadron decays of $Z_b(10610)$ and $Z_b(10650)$

Abstract

The light hadron decay processes of $Z_b(10610)/Z_b(10650)$ provide us a way to study their nature and decay mechanism. In this work, we evaluate the branching ratios of $Z_b(10610)/Z_b(10650)\to VP$ ($V$ and $P$ stand for light vector and pseudoscalar mesons, respectively) using an effective Lagrangian approach, in which the contributions of intermediate bottomed meson triangle loops are considered. In our calculations, the $Z_b(10610)$ and $Z_b(10650)$ are regarded as $B{\bar{B}}^{\ast }+c.c.$ and $B^{\ast }{\bar{B}}^{\ast }$ molecular states, respectively. The predicted branching ratios of $Z_b(10610)\to VP$ are about in the order of $10^{-2}$, while the branching ratios of $Z_b(10650)\to VP$ are in the order of $10^{-3}$. Furthermore, the dependence of these ratios between different decay modes of $Z_b(10610)/Z_b(10650)$ on the mixing $\eta -{\eta }^{\prime }$ angle ${\theta }_P$ is investigated, which may be a good quantity for the experiments. It is hoped that the calculations here could be tested by future experiments.

arXiv comment7 pages, 8 figures and 1 table

References in corpus (61)

• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Hadronic molecules
• The hidden-charm pentaquark and tetraquark states
• Observation of $J/\psi p$ resonances consistent with pentaquark states in ${\Lambda }_b^0\to J/\psi K^{-}p$ decays
• Observation of a charged charmoniumlike structure in e+e- to pi+pi-J/psi at \sqrt{s}=4.26 GeV
• Multiquark Resonances
• Non-Standard Heavy Mesons and Baryons, an Experimental Review
• Pentaquark and Tetraquark states
• Heavy-Quark QCD Exotica
• Phenomenology of Heavy Meson Chiral Lagrangians
• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• An updated review of the new hadron states
• Exotics: Heavy Pentaquarks and Tetraquarks
• Observation of two charged bottomonium-like resonances in Y(5S) decays
• From the Deuteron to Deusons, an Analysis of Deuteronlike Meson-Meson Bound States
• Final State Interactions in Hadronic B Decays
• Observation of structure in the $J/\psi$-pair mass spectrum
• Observation of an exotic narrow doubly charmed tetraquark
• Exotic Hadrons with Heavy Flavors -X, Y, Z and Related States-
• Study of the doubly charmed tetraquark $T_{cc}^{+}$
• Threshold cusps and triangle singularities in hadronic reactions
• Evidence of a $J/\psi \Lambda$ structure and observation of excited ${\Xi }^{-}$ states in the ${\Xi }_b^{-}\to J/\psi \Lambda K^{-}$ decay
• Heavy quark spin structure in Z_b resonances
• Multiquark States
• Charming penguins in B => K* pi, K (rho,omega,phi) decays
• Observation of a near-threshold structure in the $K^{+}$ recoil-mass spectra in $e^{+}{e}^{-}\to K^{+}(D_s^{-}{D}^{\ast 0}+D_s^{\ast -}{D}^0)$
• $Z_b(10610{)}^{\pm }$ and $Z_b(10650{)}^{\pm }$ as the $B^{\ast }\bar{B}$ and $B^{\ast }{\bar{B}}^{\ast }$ molecular states
• Nonfactorizable contributions in B decays to charmonium: the case of $B^{-}\to K^{-}{h}_c$
• Bound state nature of the exotic Z_b states
• Possible assignments of the $X(3872)$, $Z_c(3900)$ and $Z_b(10610)$ as axial-vector molecular states
• Radiative transitions from Upsilon(5S) to molecular bottomonium
• $Z_b$ and $Z_c$ Exotic States as Coupled Channel Cusps
• An explanation of Belle states Z_b(10610) and Z_b(10650)
• Reanalysis of the $Y(3940)$, $Y(4140)$, $Z_c(4020)$, $Z_c(4025)$ and $Z_b(10650)$ as molecular states with QCD sum rules
• Searching for observable effects induced by anomalous triangle singularities
• Could the near-threshold $XYZ$ states be simply kinematic effects?
• Heavy Quark Symmetry Predictions for Weakly Bound B-Meson Molecules
• The $Z_b(10610)$ and $Z_b(10650)$ as axial-vector tetraquark states in the QCD sum rules
• Evidence for a new structure in the $J/\psi p$ and $J/\psi \bar{p}$ systems in $B_s^0\to J/\psi p\bar{p}$ decays
• Rates for the reactions antiproton-proton --> pi phi and gamma phi
• Confirming the molecular nature of the $Z_b(10610)$ and the $Z_b(10650)$
• On Deusons or Deuteronlike Meson-Meson Bound States
• The XYZ states revisited
• $Z_b(10610)$ and $Z_b(10650)$ structures produced by the initial single pion emission in the ${\rm Y}(5S)$ decays
• Could $Z_b(10610)$ be a $B^{\ast }\bar{B}$ molecular state?
• A global fit to determine the pseudoscalar mixing angle and the gluonium content of the eta' meson
• Amplitude analysis of e+e- => Y(nS)pi+pi- at sqrt(s)=10.865 GeV
• First Observation of the Zb0(10610) in a Dalitz Analysis of Y(5S) -> Y(nS) pi0 pi0
• Decays of Zb(+) and Zb'(+) as hadronic molecules
• Study of $B{\bar{B}}^{\ast }$ and $B^{\ast }{\bar{B}}^{\ast }$ interactions in $I=1$ and relationship to the $Z_b(10610)$, $Z_b(10650)$ states
• Possible interpretation of the $Z_b$(10610) and $Z_b$(10650) in a chiral quark model
• $Z_b/Z_b^{\prime }\to {\rm Y}\pi$ and $h_b\pi$ decays in intermediate meson loops model
• More hidden heavy quarkonium molecules and their discovery decay modes
• Investigating different structures of the Z_{b}(10610) and Z_{b}(10650)
• Z_b(10610) and Z_b(10650) decays to bottomonium plus pion
• Interpretation of $Z_b(10610)$ and $Z_b(10650)$ in the ISPE mechanism and the Charmonium Counterpart
• $Z_b(10650)$ and $Z_b(10610)$ states in a chiral quark model
• Decays of Zb -> Upsilon + pi via triangle diagrams in heavy meson molecules
• Production of the $Z_b^{(\prime )}$ states from the ${\rm Y}(5S,6S)$ decays
• $D$ wave bottomonia production from $Z_b^{(\prime )}$ decay

Cited by in corpus (1)

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