ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2013, vol. 88, p. -
First observation of the Zb0(10610) in a Dalitz analysis of Υ(10860)→Υ(nS)π0π0
We report the first observation of Υ(10860)→Υ(1,2,3S) π0π0 decays. The neutral partner of the Zb±(10610), the Zb0(10610) decaying to Υ(2,3S)π0, is observed for the first time with a 6.5σ significance using a Dalitz analysis of Υ(10860)→Υ(2,3S) π0π0 decays. The results are obtained with a 121.4 fb-1 data sample collected with the Belle detector at the Υ(10860) resonance at the KEKB asymmetric-energy e+e- collider. © 2013 American Physical Society.