Abstract
We calculate the annihilation decay widths of spin-singlet heavy quarkonia , and into light hadrons with both QCD and relativistic corrections at order in nonrelativistic QCD. With appropriate estimates for the long-distance matrix elements by using the potential model and operator evolution method, we find that our predictions of these decay widths are consistent with recent experimental measurements. We also find that the corrections are small for states but substantial for states. In particular, the negative contribution of correction to the decay can lower the decay width, as compared with previous predictions without the correction, and thus result in a good agreement with the recent BESIII measurement.
1 More- Received 5 October 2012
DOI:https://doi.org/10.1103/PhysRevD.88.034002
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