Search for Dimuon Decays of a Light Scalar Boson in Radiative Transitions Υ→γA0
Author(s)
Dujmic, Denis; Yamamoto, R. K.; Sciolla, Gabriella; Henderson, Shawn Wesley; Zhao, M.; Fisher, Peter H; Spitznagel, Michael A; Cowan, Ray F; ... Show more Show less
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Alternative title
Search for Dimuon Decays of a Light Scalar Boson in Radiative Transitions Upsilon --> gamma A
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We search for evidence of a light scalar boson in the radiative decays of the Υ(2S) and Υ(3S) resonances: Υ(2S,3S)→γA[superscript 0], A[superscript 0]→μ[superscript +]μ[superscript -]. Such a particle appears in extensions of the standard model, where a light CP-odd Higgs boson naturally couples strongly to b quarks. We find no evidence for such processes in the mass range 0.212≤m[subscript A [superscript 0]]≤9.3 GeV in the samples of 99×106 Υ(2S) and 122×106 Υ(3S) decays collected by the BABAR detector at the SLAC PEP-II B factory and set stringent upper limits on the effective coupling of the b quark to the A[superscript 0]. We also limit the dimuon branching fraction of the ηb meson: B(ηb→μ[superscript +]μ[superscript -])<0.9% at 90% confidence level.
Date issued
2009-08Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review Letters
Publisher
American Physical Society
Citation
BABAR Collaboration et al. “Search for Dimuon Decays of a Light Scalar Boson in Radiative Transitions Upsilon --> gamma A.” Physical Review Letters 103.8 (2009): 081803. © 2009 The American Physical Society.
Version: Final published version
ISSN
0031-9007