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- W28939605 startingPage "2910" @default.
- W28939605 abstract "The ensuremath{Upsilon}(3S) is much closer than lower ensuremath{Upsilon}(nS) states to BBifmmodebarelsetextasciimacronfi{} and ${B}^{mathrm{*}}$Bifmmodebarelsetextasciimacronfi{} thresholds. These ``s-channel singularities'' may dominate ensuremath{Upsilon}(3S) decay amplitudes, while ``t-channel gluonic states'' dominant in conventional models are more important for other decays. An ``s-channel'' decay mechanism of sequential pion emission via a heavy intermediate state such as BBifmmodebarelsetextasciimacronfi{} or ${B}^{mathrm{*}}$Bifmmodebarelsetextasciimacronfi{} predicts a qualitatively different pion spectrum from that predicted by conventional ``t-channel'' models for ensuremath{Upsilon}(3S)ensuremath{rightarrow}ensuremath{Upsilon}(nS)ensuremath{pi}ensuremath{pi} decays and the yet unobserved ensuremath{Upsilon}(3S)ensuremath{rightarrow}ensuremath{Upsilon}${(}^{1}$${P}_{1}$)ensuremath{pi}ensuremath{pi} decay and may explain the observed disagreement between experiment and previous predictions as well as the difference between the ensuremath{Upsilon}(3S) and other states." @default.
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- W28939605 date "1989-06-19" @default.
- W28939605 modified "2023-10-02" @default.
- W28939605 title "Why is the Υ(3S) different?" @default.
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- W28939605 doi "https://doi.org/10.1103/physrevlett.62.2910" @default.
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