Spectroscopy, leptonic decays and the nature of heavy quarkonia

Details Spectroscopy, leptonic decays and the nature of heavy quarkonia Spectroscopy, leptonic decays and the nature of heavy quarkonia

2008-05-19

arxiv.org/abs/0805.2916v3

Phys.Lett.B669:52-57,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages

Scientific paper

10.1016/j.physletb.2008.09.021

We examine the electronic width ratios of Upsilon resonances below the BBbar threshold by means of an effective (Cornell-type) QCD potential incorporating 1/m_b corrections obtained from a prior fit to the bottomonium spectrum. From our analysis we conclude that the Upsilon(2S) and Upsilon(3S) states should belong to the strong-coupling (nonperturbative) regime while the Upsilon(1S) state should belong to the weak-coupling (perturbative) regime, in agreement with a previous study based on radiative decays.

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