Study of dipion bottomonium transitions and search for the h(b)(1P) state
Name
Cowan-2011-Study of dipion bottomonium transitions.pdf
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Author(s)
Dujmic, Denis
Sciolla, Gabriella
Cowan, Ray F
Date Issued
July 2011
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. et al. “Study of dipion bottomonium transitions and search for the h_{b}(1P) state.” Physical Review D 84 (2011): n. pag. Web. 8 Nov. 2011. © 2011 American Physical Society
Version
Final published version
Abstract
We study inclusive dipion decays using a sample of 108×10[superscript 6]Υ(3S) events recorded with the BABAR detector. We search for the decay mode Υ(3S)→π[superscript +]π[superscript -]h[subscript b](1P) and find no evidence for the bottomonium spin-singlet state h[subscript b](1P) in the invariant mass distribution recoiling against the π[superscript +]π[superscript -] system. Assuming the h[subscript b](1P) mass to be 9.900 GeV/c[superscript 2], we measure the upper limit on the branching fraction B[Υ(3S)→π[superscript +]π[superscript -]h[subscript b](1P)]<1.2×10[superscript -4], at 90% confidence level. We also investigate the χ[subscript bj](2P)→π[superscript +]π[superscript -]χ[subscript bJ](1P), Υ(3S)→π[superscript +]π[superscript -]Υ(2S), and Υ(2S)→π[superscript +]π[superscript -]Υ(1S) dipion transitions and present an improved measurement of the branching fraction of the Υ(3S)→π[superscript +]π[superscript -]Υ(2S) decay and of the Υ(3S)-Υ(2S) mass difference.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.84.011104
