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- W2086958013 abstract "In order to explain the observed unusually large dipion transition rates of $ensuremath{Upsilon}(10870)$, the scalar resonance contributions in the rescattering model to the dipion transitions of $ensuremath{Upsilon}(4S)$ and $ensuremath{Upsilon}(5S)$ are studied. Since the imaginary part of the rescattering amplitude is expected to be dominant, the large ratios of the transition rates of $ensuremath{Upsilon}(10870)$, which is identified with $ensuremath{Upsilon}(5S)$, to that of $ensuremath{Upsilon}(4S)$ can be understood as mainly coming from the difference between the $p$ values in their decays into open bottom channels, and the ratios are estimated numerically to be about 200--600 with reasonable choices of parameters. The absolute and relative rates of $ensuremath{Upsilon}(5S)ensuremath{rightarrow}ensuremath{Upsilon}(1S,2S,3S){ensuremath{pi}}^{+}{ensuremath{pi}}^{ensuremath{-}}$ and $ensuremath{Upsilon}(5S)ensuremath{rightarrow}ensuremath{Upsilon}(1S){K}^{+}{K}^{ensuremath{-}}$ are roughly consistent with data. We emphasize that the dipion transitions observed for some of the newly discovered $Y$ states associated with charmonia may have similar features to the dipion transitions of $ensuremath{Upsilon}(5S)$. Measurements on the dipion transitions of $ensuremath{Upsilon}(6S)$ could provide further tests for this mechanism." @default.
- W2086958013 created "2016-06-24" @default.
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- W2086958013 date "2008-04-07" @default.
- W2086958013 modified "2023-09-27" @default.
- W2086958013 title "Scalar resonance contributions to the dipion transition rates of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>Υ</mml:mi><mml:mo stretchy=false>(</mml:mo><mml:mn>4</mml:mn><mml:mi>S</mml:mi><mml:mo>,</mml:mo><mml:mn>5</mml:mn><mml:mi>S</mml:mi><mml:mo stretchy=false>)</mml:mo></mml:math>in the rescattering model" @default.
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- W2086958013 doi "https://doi.org/10.1103/physrevd.77.074003" @default.
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