Scaling of the strength in heavy meson strong decays

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• 作者：J. Segovia ; D.R. Entem ; F. Fern¨¢ndez
• 关键词：Models of strong interactions ; Heavy quarkonia ; Potential models
• 刊名：Physics Letters B
• 出版年：2012
• 出版时间：10 September, 2012
• 年：2012
• 卷：715
• 期：4-5
• 页码：322-327
• 全文大小：231 K

文摘

The phenomenological decay model has been extensively applied to calculate meson strong decays. The strength ¦Ã of the decay interaction is regarded as a free flavor independent constant and is fitted to the data. We calculate through the model the total strong decay widths of the mesons which belong to charmed, charmed-strange, hidden charm and hidden bottom sectors. The wave function of the mesons involved in the strong decays are given by a constituent quark model that describes well the meson phenomenology from the light to the heavy quark sector. A global fit of the experimental data shows that, contrarily to the usual wisdom, the ¦Ã depends on the reduced mass of the quark-antiquark pair in the decaying meson. With this scale-dependent strength ¦Ã, we are able to predict the decay width of orbitally excited B mesons not included in the fit.