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Search for the decay Bs -> D*-+ \pi+-

Abstract : A search for the decay Bs -> D*-+ \pi+- is presented using a data sample corresponding to an integrated luminosity of 1.0 fb-1 of pp collisions collected by LHCb. This decay is expected to be mediated by a W-exchange diagram, with little contribution from rescattering processes, and therefore a measurement of the branching fraction will help to understand the mechanism behind related decays such as Bs -> \pi+ \pi- and Bs -> D Dbar. Systematic uncertainties are minimised by using B0 -> D*-+ \pi+- as a normalisation channel. We find no evidence for a signal, and set an upper limit on the branching fraction of BR(Bs -> D*-+ \pi+-) < 6.1 (7.8) x10^(-6) at 90% (95%) confidence level.
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Contributor : Sabine Starita <>
Submitted on : Wednesday, February 27, 2013 - 10:45:55 AM
Last modification on : Thursday, February 25, 2021 - 10:58:33 AM

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R. Aaij, Y. Amhis, S. Barsuk, O. Callot, J. He, et al.. Search for the decay Bs -> D*-+ \pi+-. Physical Review D, American Physical Society, 2013, 87, pp.071101. ⟨10.1103/PhysRevD.87.071101⟩. ⟨in2p3-00795052⟩



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