Title: A Search for WbJ in Decays of Y(5S)

Abstract: The recent discovery by the Belle Collaboration of two new hadronic states Zb and Zb' implies the possible existence of a new family of hadronic resonances including molecular states dubbed WbJ. We search for WbJ through radiative decays of Y(5S) using data collected with the Belle detector at the KEKB asymmetric-energy electron-positron collider. Using Monte Carlo simulation, we study Belle’s sensitivity to the decay Υ(5S) → γWbJ and report the current status of our analysis.