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research article
Observation of Two Charged Bottomoniumlike Resonances in Y(5S) Decays
We report the observation of two narrow structures in the mass spectra of the pi(+/-) Y(nS) (n = 1, 2, 3) and pi(+/-) h(b)(mP) (m = 1, 2) pairs that are produced in association with a single charged pion in Y(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M-1 = (10 607.2 +/- 2.0) MeV/c(2), Gamma(1) =(18.4 +/- 2.4) MeV, and M-2 = (10 652.2 +/- 1.5) MeV/c(2), Gamma(2) = (11.5 +/- 2.2) MeV. The results are obtained with a 121.4 fb(-1) data sample collected with the Belle detector in the vicinity of the Y(5S) resonance at the KEKB asymmetric-energy e(+)e(-) collider.
Type
research article
Web of Science ID
WOS:000301704900001
Authors
Bondar, A.
•
Garmash, A.
•
Mizuk, R.
•
Santel, D.
•
Kinoshita, K.
•
Adachi, I.
•
Aihara, H.
•
Arinstein, K.
•
Asner, D. M.
•
Aushev, T.
Publication date
2012
Published in
Volume
108
Issue
12
Article Number
122001
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
April 19, 2012
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