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

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

2003-02-27

arxiv.org/abs/hep-ph/0302261v1

Phys.Lett. B562 (2003) 68-74

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages

Scientific paper

10.1016/S0370-2693(03)00537-9

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.

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