Amplitude analysis of B0 s → K0 SK±π∓ decays
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Abstract
A bstract The first untagged decay-time-integrated amplitude analysis of B s 0 → K S 0 K ± π ∓ decays is performed using a sample corresponding to 3.0 fb −1 of pp collision data recorded with the LHCb detector during 2011 and 2012. The data are described with an amplitude model that contains contributions from the intermediate resonances K * (892) 0,+ , K 2 * (1430) 0,+ and K 0 * (1430) 0,+ , and their charge conjugates. Measurements of the branching fractions of the decay modes B s 0 → K * (892) ± K ∓ and $$ {B}_s^0\to \overset{\left(\hbox{---} \right)}{K^{*}}{(892)}^0\overset{\left(\hbox{---} \right)}{K^0} $$ B s 0 → K * — 892 0 K 0 — are in agreement with, and more precise than, previous results. The decays B s 0 → K 0 * (1430) ± K ∓ and $$ {B}_s^0\to \overset{\left(\hbox{---} \right)}{K_0^{*}}{(1430)}^0\overset{\left(\hbox{---} \right)}{K^0} $$ B s 0 → K 0 * — 1430 0 K 0 — are observed for the first time, each with significance over 10 standard deviations.
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