Evidence for a Zb0(10610) in Dalitz analysis of Y(5S) -> Y(nS) pi0 pi0
  We report the first observation of Y(5S) -> Y(1,2S) pi0 pi0 decays. Evidence for the Zb0(10610) with 4.9sigma significance is found in a Dalitz plot analysis of Y(5S) -> Y(2S) pi0 pi0 decays. The results are obtained with a 121.4 fb^-1 data sample collected with the Belle detector at the Y(5S) resonance at the KEKB asymmetric-energy e+e- collider. 
I. Adachi, K. Adamczyk, H. Aihara, K. Arinstein, Y. Arita, D. M.   Asner, T. Aso, V. Aulchenko, T. Aushev, T. Aziz, A. M. Ba...
hep-ex