Observation of the Υ(1[superscript 3]DJ) bottomonium state through decays to pi+pi-Υ(1S)
Name
Sanchez-2010-Observation of the Y.pdf
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Author(s)
Cowan, Ray Franklin
Dujmic, Denis
Fisher, Peter H.
Sciolla, Gabriella
Alternative Title
Observation of the Υ(13DJ) bottomonium state through decays to π+π-Υ(1S)
Date Issued
November 2010
Journal
Physical Review D
Publisher
American Physical Society
Citation
del Amo Sanchez, P. et al. “Observation of the Υ(1^{3}D_{J}) bottomonium state through decays to π^{+}π^{-}Υ(1S).” Physical Review D 82 (2010). © 2010 The American Physical Society.
Version
Final published version
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)→γγpi+pi-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).
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.82.111102
