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We report a measurement of the branching fraction of the decay B 0 s →J/ψϕ(1020) , evidence and a branching fraction measurement for B 0 s →J/ψf ′ 2 (1525) , and the determination of the total B 0 s →J/ψK + K −   branching fraction, including the resonant and nonresonant contributions to the K + K −   channel. We also determine the S -wave contribution within the ϕ(1020)  mass region. The absolute branching fractions are B[B 0 s →J/ψϕ(1020)]=(1.25±0.07(stat)±0.08(syst)±0.22(f s ))×10 −3  , B[B 0 s →J/ψf ′ 2 (1525)]=(0.26±0.06(stat)±0.02(syst)±0.05(f s ))×10 −3  , and B[B 0 s →J/ψK + K − ]=(1.01±0.09(stat)±0.10(syst)±0.18(f s ))×10 −3  , where the last systematic error is due to the branching fraction of bb ¯ →B (*) s B (*) s  . The branching fraction ratio is found to be B[B 0 s →J/ψf ′ 2 (1525)]/B[B 0 s →J/ψϕ(1020)]=(21.5±4.9(stat)±2.6(syst))% . All results are based on a 121.4  fb −1   data sample collected at the Υ(5S)  resonance by the Belle experiment at the KEKB asymmetric-energy e + e −   collider

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Measurement of the decays<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><mml:mn>0</mml:mn></mml:msubsup><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mi>ϕ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>1020</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>B</mml:mi><mml:mi>s</mml:mi><…

Measurement of the decaysBs0→J/ψϕ(1020),Bs<…