(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

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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 > Physics
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
ISSN:	0031-9007
Official Date:	21 August 2009
Dates:	Date Event 21 August 2009 Published
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

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