Search for a Light Higgs Boson at BaBar

Details Search for a Light Higgs Boson at BaBar Search for a Light Higgs Boson at BaBar

2009-08-02

arxiv.org/abs/0908.0105v1

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 4 figures. To appear in the proceedings of Les Rencontres de Physique de la Valle'e d'Aoste held at La Thuile, Italy

Scientific paper

We search for evidence of a light Higgs boson (A0) in the radiative decays of the narrow Upsilon(3S) resonance: Upsilon(3S) -> gamma A0, where A0 -> invisible or A0 -> mu+mu-. Such an object 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 a sample of 122 million Upsilon(3S) decays collected by the BaBar collaboration at the PEP II B-factory, and set 90% C.L. upper limits on the product of the corresponding branching fractions. We also set a limit on the di-muon branching fraction of the recently discovered eta_b meson.

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