|Title:||Energy Scan of the e+e- →hb (nP)π+π- (n=1, 2) Cross Sections and Evidence for Y(11020) Decays into Charged Bottomoniumlike States||Authors:||Bhuyan, B.
Kim, K. T.
Cheon, B. G.
Kwon, Y. J.
Nisar, N. K.
Kang, K. H.
Kim, M. J.
Lange, J. S.
Asner, D. M.
|Issue Date:||28-Sep-2016||Journal Volume:||117||Journal Issue:||14||Source:||Physical Review Letters||Abstract:||
© 2016 American Physical Society. Using data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider, we measure the energy dependence of the e+e-→hb(nP)π+π- (n=1, 2) cross sections from thresholds up to 11.02 GeV. We find clear (10860) and (11020) peaks with little or no continuum contribution. We study the resonant substructure of the (11020)→hb(nP)π+π- transitions and find evidence that they proceed entirely via the intermediate isovector states Zb(10610) and Zb(10650). The relative fraction of these states is loosely constrained by the current data: The hypothesis that only Zb(10610) is produced is excluded at the level of 3.3 standard deviations, while the hypothesis that only Zb(10650) is produced is not excluded at a significant level.
|Appears in Collections:||物理學系|
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