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arXiv · 0804.4635

Bottomonium dipion transitions

Yu. A. Simonov·A. I. Veselov
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Abstract

Dipion transitions of the subthreshold bottomonium levels $Υ(nS)\to Υ(n'S) ππ$ with $n>n', n=2,3,4, n'=1,2$ are studied in the framework of the chiral decay Lagrangian, derived earlier. The channels $B\bar B, B\bar B^*+ c.c, B^* \bar B^*$ are considered in the intermediate state and realistic wave functions of $Υ(n S),B$ and $B^*$ are used in the overlap matrix elements. Imposing the Adler zero requirement on the transition matrix element, one obtains 2d and 1d dipion spectra in reasonable agreement with experiment.

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Yu. A. Simonov, A. I. Veselov. 2008-07-01. Bottomonium dipion transitions. https://doi.org/10.1103/physrevd.79.034024

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