Measurement of the shape of the Λb0→Λc+μ-ν¯μ differential decay rate

A measurement of the shape of the differential decay rate and the associated Isgur-Wise function for the decay Λb0→Λc+μ-ν¯μ is reported, using data corresponding to 3 fb-1 collected with the LHCb detector in proton-proton collisions. The Λc+μ-ν¯ μ(+anything ) final states are reconstructed through t...

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Hauptverfasser: Alfonso Albero, Alejandro, Camboni, Alessandro, Coquereau, Samuel, Fernandez, G, Garrido Beltrán, Lluís, Gascón Fora, David, Graciani Diaz, Ricardo, Graugés Pous, Eugeni, Marin Benito, Carla, Picatoste Olloqui, Eduardo, Rives Molina, Vicente José, Sánchez Gonzalo, David, LHCb Collaboration
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Sprache:eng
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Zusammenfassung:A measurement of the shape of the differential decay rate and the associated Isgur-Wise function for the decay Λb0→Λc+μ-ν¯μ is reported, using data corresponding to 3 fb-1 collected with the LHCb detector in proton-proton collisions. The Λc+μ-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 Λb0→Λc+π+π-μ-ν¯μ are used to determine contributions from Λb0→Λc*+μ-ν¯μ decays. The measured dependence of the differential decay rate upon the squared four-momentum transfer between the heavy baryons, q2, is compared with expectations from heavy-quark effective theory and from unquenched lattice QCD predictions.
ISSN:2470-0010
DOI:10.1103/PhysRevD.96.112005