Observation of the b(2S) Meson in (2S) b(2S), b(2S)' Hadrons and Confirmation of the b(1S) Meson

S. Dobbs*, Z. Metreveli, A. Tomaradze, T. Xiao, Kamal K. Seth

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The data for 9.3 million Υ(2S) and 20.9 million Υ(1S) taken with the CLEO III detector have been used to study the radiative population of states identified by their decay into 26 different exclusive hadronic final states. In the Υ(2S) decays, an enhancement is observed at a ∼5σ level at a mass of 9974.6±2.3(stat)±2.1(syst)MeV. It is attributed to η b(2S) and corresponds to the Υ(2S) hyperfine splitting of 48.7±2.3(stat)±2.1(syst)MeV. In the Υ(1S) decays, the identification of η b(1S) is confirmed at a ∼3σ level with M[η b(1S)] in agreement with its known value.

Original languageEnglish (US)
Article number082001
JournalPhysical review letters
Volume109
Issue number8
DOIs
StatePublished - Aug 24 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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