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≤9.3GeV 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.

Aubert, B., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., Prudent, X., et al. (2009). Search for dimuon decays of a light scalar boson in radiative transitions Υ→γA0. PHYSICAL REVIEW LETTERS, 103(8) [10.1103/PhysRevLett.103.081803].

Search for dimuon decays of a light scalar boson in radiative transitions Υ→γA0

Martinelli M;CARPINELLI, Massimo;
2009

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≤9.3GeV 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.
Articolo in rivista - Articolo scientifico
BABAR detector
English
2009
103
8
081803
none
Aubert, B., Karyotakis, Y., Lees, J., Poireau, V., Prencipe, E., Prudent, X., et al. (2009). Search for dimuon decays of a light scalar boson in radiative transitions Υ→γA0. PHYSICAL REVIEW LETTERS, 103(8) [10.1103/PhysRevLett.103.081803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389466
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