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VOLUME 88 (2008) | ISSUE 1 | PAGE 7
Bottomonium Υ(5S) decays into BB and BBπ
PACS: 12.38.Lg, 13.25.Hw
Abstract
Two- and three-body decays of Υ (5S) into BB, BB*, B*B*, BsBs, BsBs*, Bs* Bs* and BB*π, B*B*π are evaluated using the theory, developed earlier for dipion bottomonium transitions. The theory contains only two parameters, vertex masses Mbr and Mω, known from dipion spectra and width. Predicted values of Γtot(5S) and six partial widths Γk(5S), k=BB,BB*,... are in agreement with experiment. The decay widths Γ5S(π BB*) and Γ5S(π B*B*) are also calculated and found to be of the order of 10 keV.