Evidence is presented for the baryonic B meson decay B¯0→D0ΛΛ¯ based on a data sample of 471×106 BB¯ pairs collected with the BABAR detector at the PEP-II asymmetric e+e− collider located at the SLAC National Accelerator Laboratory. The branching fraction is determined to be ℬ(B¯0→D0ΛΛ¯)=(9.8+2.9−2.6±1.9)×10−6, corresponding to a significance of 3.4 standard deviations including additive systematic uncertainties. A search for the related baryonic B meson decay B¯0→D0Σ0Λ¯ with Σ0→Λγ is performed and an upper limit ℬ(B¯0→D0Σ0Λ¯+B¯0→D0ΛΣ¯0)<3.1×10−5 is determined at 90% confidence level.
Evidence for the baryonic decay B0bar --> D0 Lambda Lambdabar
BETTONI, Diego;BOZZI, Concezio;CALABRESE, Roberto;CIBINETTO, Gianluigi;FIORAVANTI, Elisa;GARZIA, Isabella;LUPPI, Eleonora;SANTORO, Valentina;
2014
Abstract
Evidence is presented for the baryonic B meson decay B¯0→D0ΛΛ¯ based on a data sample of 471×106 BB¯ pairs collected with the BABAR detector at the PEP-II asymmetric e+e− collider located at the SLAC National Accelerator Laboratory. The branching fraction is determined to be ℬ(B¯0→D0ΛΛ¯)=(9.8+2.9−2.6±1.9)×10−6, corresponding to a significance of 3.4 standard deviations including additive systematic uncertainties. A search for the related baryonic B meson decay B¯0→D0Σ0Λ¯ with Σ0→Λγ is performed and an upper limit ℬ(B¯0→D0Σ0Λ¯+B¯0→D0ΛΣ¯0)<3.1×10−5 is determined at 90% confidence level.File in questo prodotto:
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