We search for B meson decays into two-body combinations of η,η′,ω, and ϕ mesons from 89×10^6 BB̅ pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We find the branching fraction B(B0→ηω)=(4.0-1.2+1.3±0.4)×10-6 with a significance of 4.3σ. For the other decay modes we set the following 90% confidence level upper limits on the branching fractions, in units of 10-6: B(B0→ηη)<2.8, B(B0→ηη′)<4.6, B(B0→η′η′)<10, B(B0→η′ω)<2.8, B(B0→ηϕ)<1.0, B(B0→η′ϕ)<4.5, and B(B0→ϕϕ)<1.5.

Searches for B-0 decays to combinations of two charmless isoscalar mesons

MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;SIMI, GABRIELE;
2004

Abstract

We search for B meson decays into two-body combinations of η,η′,ω, and ϕ mesons from 89×10^6 BB̅ pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We find the branching fraction B(B0→ηω)=(4.0-1.2+1.3±0.4)×10-6 with a significance of 4.3σ. For the other decay modes we set the following 90% confidence level upper limits on the branching fractions, in units of 10-6: B(B0→ηη)<2.8, B(B0→ηη′)<4.6, B(B0→η′η′)<10, B(B0→η′ω)<2.8, B(B0→ηϕ)<1.0, B(B0→η′ϕ)<4.5, and B(B0→ϕϕ)<1.5.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2444857
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