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Observation of the Υ(1^{3}D_{J}) bottomonium state through decays to π^{+}π^{-}Υ(1S)

del Amo Sanchez, P. et al. (2010) Observation of the Υ(1^{3}D_{J}) bottomonium state through decays to π^{+}π^{-}Υ(1S). Physical Review D, 82 (11). p. 111102. ISSN 1550-7998

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Abstract

Based on 122×106Υ(3S) events collected with the BABAR detector, we have observed the Υ(13DJ) bottomonium state through the Υ(3S)→γγΥ(13DJ)→γγπ+π-Υ(1S) decay chain. The significance for the J=2 member of the Υ(13DJ) triplet is 5.8 standard deviations including systematic uncertainties. The mass of the J=2 state is determined to be 10 164.5±0.8(stat)±0.5(syst) MeV/c2. We use the π+π- invariant mass distribution to confirm the consistency of the observed state with the orbital angular momentum assignment of the Υ(13DJ).

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
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Depositing User: Sharon Beastall
Date Deposited: 05 Jul 2011 13:25
Last Modified: 05 Jul 2011 13:25
URI: http://eprints.hud.ac.uk/id/eprint/10883

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