Observation of Λ0b → D+pπ−π− and Λ0b → D*+pπ−π− decays

• The multihadron decays Λ0b → D+pπ−π− and Λ0b → D*+pπ−π− are observed in data corresponding to an integrated luminosity of 3 fb−1, collected in proton-proton collisions at centre-of-mass energies of 7 and 8 TeV by the LHCb detector. Using the decay Λ0b → Λ+c π+π−π− as a normalisation channel, the ratio of branching fractions is measured to beB(Λ0b → D+pπ−π−) / B(Λ0b → Λ0cπ+π−π−) × B(D+ → K−π+π+) / B(Λ0c → pK−π−) = (5.35±0.21±0.16)%,where the first uncertainty is statistical and the second systematic. The ratio of branching fractions for the Λ0b → D*+pπ−π− and Λ0b → D+pπ−π− decays is found to beB(Λ0b → D∗+pπ−π−) / B(Λ0b → D+pπ−π−) × (B(D∗+ → D+π0) + B(D∗+ → D+γ)) = (61.3±4.3±4.0)%.

Ämnesord

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)

Nyckelord

B Physics

Branching fraction

Flavour Physics

Hadron-Hadron Scattering

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