Studies of the resonance structure in $D^0\to K^0_S K^{\pm}\pi^{\mp}$ decays

Abstract : Amplitude models are applied to studies of resonance structure in $D^0\to K^0_S K^- \pi^+$ and $D^0\to K^0_S K^+ \pi^-$ decays using $pp$ collision data corresponding to an integrated luminosity of $3.0\,\mathrm{fb}^{-1}$ collected by the LHCb experiment. Relative magnitude and phase information is determined, and coherence factors and related observables are computed for both the whole phase space and a restricted region of $100\,\mathrm{MeV/}c^2$ around the $K^{*}(892)^{\pm}$ resonance. Two formulations for the $K\pi$ $S$-wave are used, both of which give a good description of the data. The ratio of branching fractions $\mathcal{B}(D^0\to K^0_S K^+ \pi^-)/\mathcal{B}(D^0\to K^0_S K^- \pi^+)$ is measured to be $0.655\pm0.004\,(\textrm{stat})\pm0.006\,(\textrm{syst})$ over the full phase space and $0.370\pm0.003\, \textrm{stat})\pm0.012\,(\textrm{syst})$ in the restricted region. A search for $CP$ violation is performed using the amplitude models and no significant effect is found. Predictions from $SU(3)$ flavor symmetry for $K^{*}(892)K$ amplitudes of different charges are compared with the amplitude model results.
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Physical Review D, American Physical Society, 2016, 93, pp.052018. 〈10.1103/PhysRevD.93.052018 〉
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http://hal.in2p3.fr/in2p3-01203496
Contributeur : Sabine Starita <>
Soumis le : mercredi 23 septembre 2015 - 11:09:36
Dernière modification le : jeudi 18 janvier 2018 - 01:50:38

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R. Aaij, Y. Amhis, S. Barsuk, M. Borsato, O. Kochebina, et al.. Studies of the resonance structure in $D^0\to K^0_S K^{\pm}\pi^{\mp}$ decays. Physical Review D, American Physical Society, 2016, 93, pp.052018. 〈10.1103/PhysRevD.93.052018 〉. 〈in2p3-01203496〉

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