Observation of inclusive D[superscript *± ] production in the Decay of Υ(1S)
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PhysRevD.81.011102.pdf
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Author(s)
BaBar Collaboration
Cowan, Ray F
Dujmic, Denis
Fisher, Peter H
Henderson, Shawn Wesley
Sciolla, Gabriella
Spitznagel, Michael A
Yamamoto, R. K.
Zhao, M.
Date Issued
January 2010
Journal
Physical Review D
Publisher
American Physical Society (APS)
Citation
Aubert, B. et al. “Observation of inclusive D[superscript *± ] production in the Decay of Υ(1S).” Physical Review D 81, 1 (January 2010): 011102(R) © 2010 American Physical Society
Version
Final published version
Abstract
We present a study of the inclusive D[superscript * ±] production in the decay of Υ(1S) using (98.6±0.9)×10[superscript 6] Υ(2S) mesons collected with the BABAR detector at the Υ(2S) resonance. Using the decay chain Υ(2S)→π[superscript +] π[superscript -] Υ(1S), Υ(1S)→D[superscript * ± ]X, where X is unobserved, we measure the branching fraction B[Υ(1S)→D* ± X]=(2. 52±0.13(stat)±0.15(syst))% and the D* ± momentum distribution in the rest frame of the Υ(1S). We find evidence for an excess of D[superscript * ±] production over the expected rate from the virtual photon annihilation process Υ(1S)→γ *→cc̄→D[superscript * ± ]X.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.81.011102
