A case for hidden b anti b tetraquarks based on e+e- → b anti b cross sections between √(s) = 10.54 and 11.20 GeV

We study the spectroscopy and dominant decays of the bottomonium-like tetraquarks (bound diquarks-antidiquarks), focusing on the lowest lying P-wave [bq][anti b anti q] states Y[bq] (with q=u,d), having JPC=1--. To search for them, we analyse the BABAR data obtained during an energy scan of the e+e-→b anti b cross section in the range of √(s)=10.54 to 11.20 GeV. We find that these data are consistent with the presence of an additional b anti b state Y[bq] with a mass of 10.90 GeV and a width of about 30 MeV apart from the Υ(5S) and Υ(6S) resonances. A closeup of the energy region around the Y[bq]-mass may resolve this state in terms of the two mass eigenstates, Y[b,l] and Y[b,h], with a mass difference, estimated as about 6 MeV. We tentatively identify the state Y[bq](10900) from the Rb-scan with the state Yb(10890) observed by BELLE in the process e+e-→Yb(10890)→Υ(1S,2S)π+π- due to their proximity in masses and decay widths. (orig.)