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

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Title:	First observation of the rare B+ → D+K+π− decay
Author:	Abellan Beteta, Carlos; Camboni, Alessandro; Comerma Montells, Albert; Garrido Beltrán, Lluís; Graciani Díaz, Ricardo; Graugés Pous, Eugeni; Pérez-Calero Yzquierdo, Antonio; Picatoste Olloqui, Eduardo; Rives Molina, Vicente José; LHCb Collaboration
Other authors:	Universitat de Barcelona
Abstract:	The 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.
Subject(s):	-Hadrons -Mesons (Física nuclear) -Hadrons -Mesons (Nuclear physics)
Rights:	(c) American Physical Society, 2016
Document type:	Article Article - Published version
Published by:	American Physical Society
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