Charged-to-neutral heavy meson yield ratio at the Z_b^0 resonances as a probe of the I^G(J^P)=0^-(1^+) channel

Abstract

It is argued that the ratio of the yield of pairs of charged and neutral $B^{(\ast )}$ mesons in the processes ${\rm Y}(5S)\to {\pi }^0+(B{\bar{B}}^{\ast }+c.c.)$ and ${\rm Y}(5S)\to {\pi }^0+B^{\ast }{\bar{B}}^{\ast }$ is very sensitive near the corresponding heavy meson threshold to the strong interaction between the mesons in the $I^G(J^P)=0^{-}(1^{+})$ channel due to significant isospin breaking by the Coulomb force. This channel, not readily accessible by other means, may contain near-threshold molecular meson-antimeson resonances --- isoscalar analogs of the isovector states $Z_b(10610)$ and $Z_b(10650)$.

6 pages, 2 figures

References in corpus (5)

• Observation of two charged bottomonium-like resonances in Y(5S) decays
• Tetraquark Interpretation of the Charged Bottomonium-like states Z_b^+-(10610) and Z_b^+-(10650) and Implications
• Isospin breaking in the yield of heavy meson pairs in e+e- annihilation near threshold
• Exotic Charmonium and Bottomonium-like Resonances
• The possible candidates of tetraquark : $Z_b(10610)$ and $Z_b(10650)$

Cited by in corpus (5)

• The hidden-charm pentaquark and tetraquark states
• Hadron physics potential of future high-luminosity B-factories at the Upsilon(5S) and above
• Search for the isospin violating decay $Y(4260)\to J/\psi \eta {\pi }^0$
• Modification by pion exchange of near threshold resonance line shape in open heavy flavor channel
• Isospin violation in the yield of S-wave heavy meson pairs near threshold