Abstract
We report the observation of two narrow structures in the mass spectra of the π ±Υ(nS) (n=1, 2, 3) and π ±h b(mP) (m=1, 2) pairs that are produced in association with a single charged pion in Υ(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M 1=(10607.2±2.0)MeV/c2, Γ 1=(18.4±2.4) MeV, and M 2=(10652.2±1.5)MeV/c2, Γ 2=(11. 5±2.2)MeV. The results are obtained with a 121.4fb -1 data sample collected with the Belle detector in the vicinity of the Υ(5S) resonance at the KEKB asymmetric-energy e +e - collider.
Original language | English |
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Article number | 122001 |
Journal | Physical review letters |
Volume | 108 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2012 Mar 20 |
Bibliographical note
Funding Information:Supported by a grant from the Gary Owen Memorial Foundation, Foothills Hospital, Calgary, Alberta, Canada. The authors whish to acknowledge the work of Mr. James Broadhead, who helped gather data for this study, and the support of the staff of the Neurological Clinic at the Tom Baker Cancer Centre. The authors also greatly appreciate the contributions of our patients.
ASJC Scopus subject areas
- General Physics and Astronomy