Search for a light Higgs boson at BaBar

Banerjee, S. (2009) Search for a light Higgs boson at BaBar. Il nuovo cimento C, 32 (5\6). pp. 315-322. ISSN 1826-9885

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We search for evidence of a light Higgs boson (A0) in the radiative decays of the narrow Υ(3S) resonance: Υ(3S) → γA0, where A0 → invisible or A0 → μ+μ−. 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 × 106 Υ(3S) decays collected by the BaBar Collaboration at the PEP-II B-factory, and set 90% CL upper limits on the product of the branching fractions B(Υ(3S) → γA0)×B(A0 → invisible) at (0.7−31)×10−6 in the mass range mA0 ≤ 7.8 GeV, and on the product B(Υ(3S) → γA0)×B(A0 → μ+μ−) at (0.25–5.2) × 10−6 in the mass range 0.212 ≤ mA0 ≤ 9.3GeV. We also set a limit on the dimuon branching fraction of the recently discovered ηb-meson B(ηb → μ+μ−) < 0.8% at 90% CL. The results are preliminary.

Item Type: Article
Uncontrolled Keywords: Extensions of electroweak Higgs Sector ; Non-standard-model Higgs bosons ; Gauge and Higgs boson production in e−e+ interactions
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 30 Mar 2020 15:00
Last Modified: 30 Mar 2020 15:00

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