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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
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
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
2009-08
URI
http://hdl.handle.net/1721.1/51793
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
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

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