6 research outputs found

    Test of Lepton Universality Using B+ -> K(+)l(+)l(-) Decays

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    Measurement of the (B)over-bar(s)(0) Meson Lifetime in D-s(+)pi(-) Decays

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    First Observation of a Baryonic B-c(+) Decay

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    Dalitz plot analysis of B-s(0) -> (D)over-bar(0)K(-)pi(+) decays

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    First Observation of the Radiative Decay Lambda(0 )(b)-> Lambda gamma

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    The radiative decay Λ0b→Λγ is observed for the first time using a data sample of proton-proton collisions corresponding to an integrated luminosity of 1.7  fb−1 collected by the LHCb experiment at a center-of-mass energy of 13 TeV. Its branching fraction is measured exploiting the B0→K*0γ decay as a normalization mode and is found to be B(Λ0b→Λγ)=(7.1±1.5±0.6±0.7)×10−6, where the quoted uncertainties are statistical, systematic, and systematic from external inputs, respectively. This is the first observation of a radiative decay of a beauty baryon

    Measurement of the (B)over-bar(s)(0) Meson Lifetime in D-s(+)pi(-) Decays

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    We present a measurement of the ratio of the (B) over bar (0)(s) meson lifetime, in the flavor-specific decay to D-s(+)pi(-), to that of the (B) over bar (0) meson. The pp collision data used correspond to an integrated luminosity of 1 fb(-1), collected with the LHCb detector, at a center-of-mass energy of 7 TeV. Combining our measured value of 1.010 +/- 0.010 +/- 0.008 for this ratio with the known (B) over bar (0) lifetime, we determine the flavor-specific (B) over bar (0)(s) lifetime to be tau((B) over bar (0)(s) ) = 1.535 +/- 0.015 +/- 0.014 ps, where the uncertainties are statistical and systematic, respectively. This is the most precise measurement to date, and is consistent with previous measurements and theoretical predictions
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