Single eta production in heavy quarkonia transitions

Details Single eta production in heavy quarkonia transitions Single eta production in heavy quarkonia transitions

2008-06-18

arxiv.org/abs/0806.2919v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages

Scientific paper

The $\eta$ production in the $(n,n')$ bottomonium transitions $\Upsilon (n)
\to \Upsilon (n') \eta, $ is studied in the method used before for dipion heavy
quarkonia transitions. The widths $\Gamma_\eta(n,n')$ are calculated without
fitting parameters for $n=2,3,4,5, n'=1$.Resulting $\Gamma_\eta(4,1)$ is found
to be large in agreement with recent data.

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