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Search for dimuon decays of a light scalar boson in radiative transitions upsilon ->gamma A(0)

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BaBar Collaboration (Including:

Aubert, B., Karyotakis, Y., Lees, J. P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M. et al.
). (2009) Search for dimuon decays of a light scalar boson in radiative transitions upsilon ->gamma A(0). Physical Review Letters, Vol.103 (No.8). article no. 081803 . doi:10.1103/PhysRevLett.103.081803 ISSN 0031-9007.

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.103.081803

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Abstract

We search for evidence of a light scalar boson in the radiative decays of the Upsilon(2S) and Upsilon(3S) resonances: Upsilon(2S,3S)->gamma A(0), A(0)->mu(+)mu(-). 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(A)(0)< 9.3 GeV in the samples of 99x10(6) Upsilon(2S) and 122x10(6) Upsilon(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(0). We also limit the dimuon branching fraction of the eta(b) meson: B(eta(b)->mu(+)mu(-))< 0.9% at 90% confidence level.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 21 August 2009
Dates:
DateEvent
21 August 2009Published
Volume: Vol.103
Number: No.8
Number of Pages: 7
Page Range: article no. 081803
DOI: 10.1103/PhysRevLett.103.081803
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain), STFC (United Kingdom), Marie Curie EIF (European Union), A.P. Sloan Foundation

Data sourced from Thomson Reuters' Web of Knowledge

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