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- W1729830991 abstract "We present an analysis of the semi-inclusive decays Bs→Ds−Xℓ+ν and Bs→Ds*−Xℓ+ν, where X denotes a final state that may consist of additional hadrons or photons and ℓ is an electron or muon. The studied Bs decays are contained in the 121.4 fb−1 Υ(5S) data sample collected by the Belle detector at the KEKB asymmetric-energy e+e− collider. The branching fractions of the decays are measured to be B(Bs→Ds−Xℓ+ν)=[8.2±0.2(stat)±0.6(syst)±1.4(ext)]% and B(Bs→Ds*−Xℓ+ν)=[5.4±0.4(stat)±0.4(syst)±0.9(ext)]%, where the first two uncertainties are statistical and systematic and the last is due to external parameters. The measurement also provides an estimate of the Bs(*)B¯s(*) production cross section, σ(e+e−→Bs(*)B¯s(*))=[53.8±1.4(stat)±4.0(syst)±3.4(ext)] pb, at the center-of-mass energy s=10.86 GeV.Received 8 April 2015DOI:https://doi.org/10.1103/PhysRevD.92.072013© 2015 American Physical Society" @default.
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