A measurement of the shape of the differential decay rate and the associated Isgur-Wise function for the decay Λ0b → Λc+ μ− anti-ν_μ is reported, using data corresponding to 3 fb^−1 collected with the LHCb detector in proton-proton collisions. The Λc+ μ− anti-ν_μ (+anything) final states are reconstructed through the detection of a muon and a Λc+ baryon decaying into p K− π+, and the decays Λ0b → Λc+ π+ π− μ− anti-ν_μ are used to determine contributions from Λ0b → Λc*+ μ− anti-ν_μ decays. The measured dependence of the differential decay rate upon the squared four-momentum transfer between the heavy baryons, q^2, is compared with expectations from heavy-quark effective theory and from unquenched lattice QCD predictions.
Measurement of the Shape of the Λ0b → Λc+ μ− anti-ν_μ Differential Decay Rate
Capriotti, L.;
2017
Abstract
A measurement of the shape of the differential decay rate and the associated Isgur-Wise function for the decay Λ0b → Λc+ μ− anti-ν_μ is reported, using data corresponding to 3 fb^−1 collected with the LHCb detector in proton-proton collisions. The Λc+ μ− anti-ν_μ (+anything) final states are reconstructed through the detection of a muon and a Λc+ baryon decaying into p K− π+, and the decays Λ0b → Λc+ π+ π− μ− anti-ν_μ are used to determine contributions from Λ0b → Λc*+ μ− anti-ν_μ decays. The measured dependence of the differential decay rate upon the squared four-momentum transfer between the heavy baryons, q^2, is compared with expectations from heavy-quark effective theory and from unquenched lattice QCD predictions.| File | Dimensione | Formato | |
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2017-AR-66-Meas_of_the_Shape_of_the_Lambda0b_to_Lambdacp_mum_anti_nu-PRD.pdf
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