Concepedia

Evidence for a Zb0(10610) in Dalitz analysis of Y(5S) -> Y(nS) pi0 pi0

I. Adachi, T. Kuhr, T. Iwashita, I.-S. Cho, Y. Chao, S. Esen, B. R. Ko, S. Vahsen, D. Epifanov, H. Kichimi,

arXiv (Cornell University) · 2012 · 12 citations · 0 references

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Concepts

Natural SciencesPhysicsNuclear PhysicsParticle PhysicsSpectroscopyCollider PhysicsHadron SpectroscopyNuclear DecayParticle DetectorsCollider Signatures Of New PhysicsDalitz DecaysDalitz Plot AnalysisHadronic Decay AmplitudesZ Boson PhysicsZ Bosons

Abstract

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.