Observation of the suppressed ADS modes $B^± \to [π^± K^∓ π^+π^-]_D K^±$ and $B^± \to [π^± K^∓ π^+π^-]_D π^±$

R. Aaij, J.F.J. van den Brand, F. Dettori, T.J. Ketel, R. Koopman, R.W. Lambert, D. Martinez-Santos, M.H.M. Merk, H.G. Raven, M. Schiller, V. Syropoulos, S. Tolk, Collaboration LHCb

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An analysis of B± → DK± and B± → Dπ± decays is presented where the D meson is reconstructed in the four-body nal state K±ππ+π-. Using LHCb data corresponding to an integrated luminosity of 1.0 fb-1, rst observations are made of the suppressed ADS modes B± →[π±Kπ+π-] D K± and B± → [π±Kπ+π-]Dπ± with a signicance of 5.1σ and greater than 10σ, respectively. Measurements of CP asymmetries and CP-conserving ratios of partial widths from this family of decays are also performed. The magnitude of the ratio between the suppressed and favoured B± → DK± amplitudes is determined to be rK<inf>B</inf> = 0.097±0.011. © CERN for the benet of the LHCb Collaboration.
Original languageUndefined/Unknown
Pages (from-to)44-53
JournalPhysics Letters B
Issue number1-3
Publication statusPublished - 2013

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