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Measurement of Bs0 --> Ds(*)+ Ds(*)- Branching Ratios

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    0388863 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
    Aaltonen, T. - Gonzalez, B.A. - Amerio, S. - Lysák, Roman
    Measurement of Bs0 --> Ds(*)+ Ds(*)- Branching Ratios.
    Physical Review Letters. Roč. 108, č. 20 (2012), "201801-1"-"201801-7". ISSN 0031-9007
    Grant CEP: GA MŠk LC527
    Výzkumný záměr: CEZ:AV0Z10100502
    Klíčová slova: Batavia TEVATRON * B/s0 hadronic decay * charmed meson pair production * CDF
    Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
    Impakt faktor: 7.943, rok: 2012

    The decays Bs0 --> Ds(*)+ Ds(*)- are reconstructed in a data sample corresponding to an integrated luminosity of 6.8 fb-1 collected by the CDF II detector at the Tevatron p/bar{p} collider. All decay modes are observed with a significance of more than 10 sigma, and we measure the Bs0 production rate times Bs0 --> Ds(*)+ Ds(*)- branching ratios relative to the normalization mode B0 --> Ds+ D- to be $0.183 /pm 0.021 /pm 0.017$ for Bs0 --> Ds+ Ds-, $0.424 /pm 0.046 /pm 0.035$ for Bs0 --> Ds*+- Ds-+, $0.654 /pm 0.072 /pm 0.065$ for Bs0 --> Ds*+ Ds*-, and $1.261 /pm 0.095 /pm 0.112$ for the inclusive decay Bs0 --> Ds(*)+ Ds(*)-, where the uncertainties are statistical and systematic. These results are the most precise single measurements to date and provide important constraints for indirect searches for non-standard model physics in Bs0 mixing.
    Trvalý link: http://hdl.handle.net/11104/0217763
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