The enhancement of the decay Upsilon(1D) -> eta Upsilon(1S) by the axial anomaly in QCD

Abstract

It is shown that the rates of the decays Upsilon(1^3D_1) -> eta Upsilon(1S) and Upsilon(1^3D_2) -> eta Upsilon(1S) should be comparable to and likely exceed that of the recently discussed in the literature two-pion transition Upsilon(1D) -> pi pi Upsilon(1S). The reason for this behavior is that the discussed eta transitions are enhanced by the contribution of the anomaly in the flavor singlet axial current in QCD.

arXiv comment11 pages

References in corpus (1)

• Production of the D-wave $b\bar{b}$ states

Cited by in corpus (16)

• Effective field theories for heavy quarkonium
• Charmonium
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• Quarkonia and their transitions
• Charmonium Options for the X(3872)
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• Bottomonium Mesons and Strategies for Their Observation
• First Observation of a Upsilon(1D) State
• Pionic transitions from X(3872) to chi_{cJ}
• Heavy quark spin symmetry breaking in near-threshold $J^{PC}=1^{--}$ quarkonium-like resonances
• Heavy Quarkonium
• Two-pion transitions in quarkonium revisited
• The $\bar{c}c$ purity of $\psi (3770)$ and ${\psi }^{\prime }$ challenged
• Novel implementation of the multipole expansion to quarkonium hadronic transitions
• Study of $\eta$ and dipion transitions in ${\rm Y}(4S)$ decays to lower bottomonia
• A possible gateway to eta_b: chi_{b0}(2P) -> eta eta_b