Camboni, AlessandroCoquereau, S.Fernandez, G.Garrido Beltrán, LluísGascon, D.Graciani Diaz, RicardoGraugés Pous, EugeniMarin Benito, CarlaPicatoste Olloqui, EduardoRives Molina, Vicente JoséSanchez Gonzalo, D.Alfonso Albero, AlejandroCalvo Gomez, M.Gironella Gironell, P.Vazquez Gomez, R.LHCb Collaboration2022-06-082022-06-082017-072470-0010https://hdl.handle.net/2445/186475The B+→D*-K+π+decaypotentially provides an excellent way to investigate charm meson spectroscopy. The decay is searched for in a sample of proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb-1 . A clear signal is observed, and the ratio of its branching fraction to that of the B+→D*-π+π+ normalization channel is measured to be B (B+→D*-K+π+)/B (B+→D*-π+π+)=(6.39 ±0.27 ±0.48 ) ×10-2, where the first uncertainty is statistical and the second is systematic. This is the first observation of the B+→D*-K+π+ decay.10 p.application/pdfeng(c) American Physical Society, 2017HadronsGran Col·lisionador d'HadronsFísica de partículesExperimentsHadronsLarge Hadron Collider (France and Switzerland)Particle physicsExperimentsinfo:eu-repo/semantics/article6780072022-06-08info:eu-repo/semantics/openAccess