2-9 July 2014
Valencia, Spain
Europe/Madrid timezone

Hadroproduction of $\Upsilon(nS)$ above the $B\bar{B}$ threshold and implications for $Y_b(10890)$

3 Jul 2014, 15:15
Sala 8+9 ()

Sala 8+9

Oral presentation Strong Interactions and Hadron Physics Strong Interactions and Hadron Physics


Prof. Ahmed Ali (DESY)


Based on the non-relativistic QCD factorization scheme, we study the hadroproduction of the bottomonium states Υ(5S) and Υ(6S). We argue to search for them in the final states Υ(1S,2S,3S)π+π−, which are found to have anomalously large production rates at Υ(5S). The enhanced rates for the dipionic transitions in the Υ(5S)-energy region could, besides Υ(5S), be ascribed to Yb(10890), a state reported by the Belle collaboration, which may be interpreted as a tetraquark. The LHC/Tevatron measurements are capable of making a case in favor of or against the existence of Yb(10890), as demonstrated here. Dalitz analysis of the Υ(1S,2S,3S)π+π− states from the Υ(5S)/Yb(10890) decays also impacts directly on the interpretation of the charged bottomonium-like states, Zb(10600) and Zb(10650), discovered by Belle in these puzzling decays.

Primary author

Prof. Ahmed Ali (DESY)

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