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First observation and amplitude analysis of the B−→D+K−π− decay

Abstract : 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. Its branching fraction is measured to be B(B−→D+K−π−)=(7.92±0.23±0.24±0.42)×10−5 where the uncertainties are statistical, systematic and from the branching fraction of the normalisation channel B−→D+π−π−, respectively. An amplitude analysis of the resonant structure of the B−→D+K−π− decay is used to measure the contributions from quasi-two-body B−→D∗0(2400)0K−, B−→D∗2(2460)0K−, and B−→D∗J(2760)0K− decays, as well as from nonresonant sources. The D∗J(2760)0 resonance is determined to have spin~1.
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Submitted on : Wednesday, March 11, 2015 - 2:22:06 PM
Last modification on : Monday, November 15, 2021 - 11:34:12 PM

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R. Aaij, Y. Amhis, S. Barsuk, M. Borsato, O. Kochebina, et al.. First observation and amplitude analysis of the B−→D+K−π− decay. Physical Review D, American Physical Society, 2015, 91 (9), pp.092002. ⟨10.1103/PhysRevD.91.092002⟩. ⟨in2p3-01130212⟩



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