Inclusive η′ production from the Υ(1S)
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ID: 273757
2003
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Abstract
Using the CLEO II detector at CESR, we measure the ${\ensuremath{\eta}}^{\ensuremath{'}}$ energy spectra in $\ensuremath{\Upsilon}(1S)$ decays that we compare with models of the ${\ensuremath{\eta}}^{\ensuremath{'}}{g}^{*}g$ form factor. This form factor, especially at large ${\ensuremath{\eta}}^{\ensuremath{'}}$ energies, may provide an explanation of the large rate for $\stackrel{\ensuremath{\rightarrow}}{B}{X}_{s}{\ensuremath{\eta}}^{\ensuremath{'}}.$ Our data do not support a large anomalous coupling at higher ${q}^{2}$ and thus the large ${\ensuremath{\eta}}^{\ensuremath{'}}$ rate remains a mystery, possibly requiring a non-standard-model explanation.
| Reference Key |
2003physicalinclusive
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| Authors | |
| Journal | physical review d |
| Year | 2003 |
| DOI |
doi:10.1103/PhysRevD.67.052003
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