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

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

The B+→D+K+π- 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 8σ and the branching fraction is measured to be B(B+→D+K+π-)=(5.31±0.90±0.48±0.35)×10-6, where the uncertainties are statis...

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Bibliographic Details
Main Authors: Aaij, R, Abellán Beteta, C, Adeva, B, Cheung, S, Evans, T, Gandini, P, Gauld, R, Greening, E, Hadavizadeh, T, Harnew, N, Hill, D, Hussain, N, Jalocha, J, John, M, Lupton, O, Malde, S, Nandi, A, Smith, E, Stevenson, S, Thomas, C, Topp-Joergensen, S, Torr, N, Wilkinson, G
Format: Journal article
Published: American Physical Society 2016
Description
Summary:The B+→D+K+π- 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 8σ and the branching fraction is measured to be B(B+→D+K+π-)=(5.31±0.90±0.48±0.35)×10-6, where the uncertainties are statistical, systematic and due to the normalization mode B+→D-K+π+, respectively. The Dalitz plot appears to be dominated by broad structures. Angular distributions are exploited to search for quasi-two-body contributions from B+→D2∗(2460)0K+ and B+→D+K∗(892)0 decays. No significant signals are observed and upper limits are set on their branching fractions.

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