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Open Access Publications from the University of California

Observation of the decay Bs0→ϕπ+π- and evidence for B0→ϕπ+π-

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The first observation of the rare decay Bs0→φπ+π- and evidence for B0→φπ+π- are reported, using pp collision data recorded by the LHCb detector at center-of-mass energies s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1. The branching fractions in the π+π- invariant mass range 400

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