Search for Dimuon Decays of a Light Scalar Boson in Radiative Transitions Υ→γA0

Aubert, B. et al. (2009) Search for Dimuon Decays of a Light Scalar Boson in Radiative Transitions Υ→γA0. Physical Review Letters, 103 (8). 081803. ISSN 0031-9007

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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)→γA0, A0→μ+μ-. 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≤mA0≤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 A0. We also limit the dimuon branching fraction of the ηb meson: B(ηb→μ+μ-)<0.9% at 90% confidence level.

Item Type:	Article
Subjects:	Q Science > QC Physics
Schools:	School of Applied Sciences
Related URLs:	Author
Depositing User:	Sharon Beastall
Date Deposited:	04 Jan 2012 11:37
Last Modified:	05 Apr 2018 18:45
URI:	http://eprints.hud.ac.uk/id/eprint/12310

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