Measurement of the absolute branching fraction of the Ds+- meson
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✦ hep-ex
keywords
absolutebranchingfractionasymmetricbellecollectedcolliderdetector
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The Ds+- -> K+-K-+pi+- absolute branching fraction is measured using e+e- -> Ds*+- Ds1-+(2536) events collected by the Belle detector at the KEKB e+e- asymmetric energy collider. Using the ratio of yields when either the Ds1 or Ds* is fully reconstructed, we find Br(Ds+- -> K+-K-+pi+-)= (4.0+-0.4(stat)+-0.4(sys))%.
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