Spectroscopy, Leptonic Decays and the Nature of Heavy Quarkonia *
نویسنده
چکیده
We examine the electronic width ratios of Υ resonances below the BB̄ threshold by means of an effective (Cornelltype) QCD potential incorporating 1/mb corrections obtained from a prior fit to the bottomonium spectrum. From our analysis we conclude that the Υ(2S) and Υ(3S) states should belong to the strong-coupling (nonperturbative) regime while the Υ(1S) state should belong to the weak-coupling (perturbative) regime, in agreement with a previous study based on radiative decays.
منابع مشابه
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