Observation of the ηb(2S) Meson in Υ(2S)γηb(2S), ηb(2S) Hadrons and Confirmation of the ηb(1S) Meson

S. Dobbs, Z. Metreveli, A. Tomaradze, T. Xiao, and Kamal K. Seth
Phys. Rev. Lett. 109, 082001 – Published 24 August 2012

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 ηb(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 ηb(1S) is confirmed at a 3σ level with M[ηb(1S)] in agreement with its known value.

  • Figure
  • Figure
  • Received 18 April 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.082001

© 2012 American Physical Society

Authors & Affiliations

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

  • Northwestern University, Evanston, Illinois 60208, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 109, Iss. 8 — 24 August 2012

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×