First observation of the rare B+ → D+K+π− decay

Abellan Beteta, CarlosCamboni, AlessandroComerma Montells, AlbertGarrido Beltrán, LluísGraciani Díaz, RicardoGraugés Pous, EugeniPérez-Calero Yzquierdo, AntonioPicatoste Olloqui, EduardoRives Molina, Vicente JoséLHCb Collaboration2017-07-272017-07-272016-03-032470-0010https://hdl.handle.net/2445/114431The B+ -> D+K+pi(-) decay is observed in a data sample corresponding to 3.0 fb(-1) of pp collision data recorded by the LHCb experiment during 2011 and 2012. The signal significance is 8 sigma and the branching fraction is measured to be B(B+ -> D+K+pi(-)) = (5.31 +/- 0.90 +/- 0.48 +/- 0.35) x 10(-6), where the uncertainties are statistical, systematic and due to the normalization mode B+ -> D-K+pi(+), respectively. The Dalitz plot appears to be dominated by broad structures. Angular distributions are exploited to search for quasi-two-body contributions from B+ -> D*(2)(2460)K-0(+) and B+ -> (D+K*)(892)(0) decays. No significant signals are observed and upper limits are set on their branching fractions.11 p.application/pdfeng(c) American Physical Society, 2016HadronsMesons (Física nuclear)HadronsMesons (Nuclear physics)First observation of the rare B+ → D+K+π− decayinfo:eu-repo/semantics/article6693292017-07-27info:eu-repo/semantics/openAccess