Bottomonium dipion transitions

Details Bottomonium dipion transitions Bottomonium dipion transitions

2008-04-29

arxiv.org/abs/0804.4635v2

Phys.Rev.D79:034024,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

34 pages, 18 figures

Scientific paper

10.1103/PhysRevD.79.034024

Dipion transitions of the subthreshold bottomonium levels $\Upsilon (nS)\to \Upsilon (n'S) \pi\pi$ 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 $\Upsilon (n S),B$ 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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