The enhancement of the decay υ (1D) → ηυ (1S) by the axial anomaly in QCD

M. B. Voloshin

doi:10.1016/S0370-2693(03)00537-9

The enhancement of the decay υ (1D) → ηυ (1S) by the axial anomaly in QCD

M. B. Voloshin

Physics and Astronomy (Twin Cities)

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17 Scopus citations

Abstract

It is shown that the rates of the decays Υ (1³D₁) → νΥ (1S) and Υ (1³D₂) → ηΥ (1S) should be comparable to and likely exceed that of the recently discussed in the literature two-pion transition Υ (1D) → ππΥ (1S). The reason for this behavior is that the discussed η transitions are enhanced by the contribution of the anomaly in the flavor singlet axial current in QCD.

Original language	English (US)
Pages (from-to)	68-74
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	562
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(03)00537-9
State	Published - Jun 5 2003

Bibliographical note

Funding Information:
I gratefully acknowledge enlightening conversations with Arkady Vainshtein. This work is supported in part by the DOE grant DE-FG02-94ER40823.

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abstract = "It is shown that the rates of the decays Υ (13D1) → νΥ (1S) and Υ (13D2) → ηΥ (1S) should be comparable to and likely exceed that of the recently discussed in the literature two-pion transition Υ (1D) → ππΥ (1S). The reason for this behavior is that the discussed η transitions are enhanced by the contribution of the anomaly in the flavor singlet axial current in QCD.",

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N2 - It is shown that the rates of the decays Υ (13D1) → νΥ (1S) and Υ (13D2) → ηΥ (1S) should be comparable to and likely exceed that of the recently discussed in the literature two-pion transition Υ (1D) → ππΥ (1S). The reason for this behavior is that the discussed η transitions are enhanced by the contribution of the anomaly in the flavor singlet axial current in QCD.

AB - It is shown that the rates of the decays Υ (13D1) → νΥ (1S) and Υ (13D2) → ηΥ (1S) should be comparable to and likely exceed that of the recently discussed in the literature two-pion transition Υ (1D) → ππΥ (1S). The reason for this behavior is that the discussed η transitions are enhanced by the contribution of the anomaly in the flavor singlet axial current in QCD.

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The enhancement of the decay υ (1D) → ηυ (1S) by the axial anomaly in QCD

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