The charmless three-body decays B0(s) → K0S h+ h′− (where h(′) = π, K) are analysed using a sample of pp collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 3 fb^−1. The branching fractions are measured relative to that of the B0 → K0S π+ π− decay, and are determined to be: B(B0 → K0S K± π∓)/B(B0 → K0S K+ π−) = 0.123 ± 0.009(stat) ± 0.015(syst), B(B0 → K0S K+ K−)/B(B0 → K0S π+ π−) = 0.549 ± 0.018(stat) ± 0.033(syst), B(B0s → K0S π+ π−)/B(B0 → K0S π+ π−) = 0.191 ± 0.027(stat) ± 0.031(syst) ± 0.011(f_s/f_d), B(B0s → K0S K± π∓)/B(B0 → K0S π+ π−) = 1.70 ± 0.07(stat) ± 0.11(syst) ± 0.10(f_s/f_d), B(B0s → K0S K+ K−)/B(B0 → K0S π+ π−) ∈ [0.008−0.051] at 90% confidence level, where f_s/f_d represents the ratio of hadronisation fractions of the B0s and B0 mesons.
Updated Branching Fraction Measurements of B0(s) → K0S h+ h′− Decays
Capriotti, L.;
2017
Abstract
The charmless three-body decays B0(s) → K0S h+ h′− (where h(′) = π, K) are analysed using a sample of pp collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 3 fb^−1. The branching fractions are measured relative to that of the B0 → K0S π+ π− decay, and are determined to be: B(B0 → K0S K± π∓)/B(B0 → K0S K+ π−) = 0.123 ± 0.009(stat) ± 0.015(syst), B(B0 → K0S K+ K−)/B(B0 → K0S π+ π−) = 0.549 ± 0.018(stat) ± 0.033(syst), B(B0s → K0S π+ π−)/B(B0 → K0S π+ π−) = 0.191 ± 0.027(stat) ± 0.031(syst) ± 0.011(f_s/f_d), B(B0s → K0S K± π∓)/B(B0 → K0S π+ π−) = 1.70 ± 0.07(stat) ± 0.11(syst) ± 0.10(f_s/f_d), B(B0s → K0S K+ K−)/B(B0 → K0S π+ π−) ∈ [0.008−0.051] at 90% confidence level, where f_s/f_d represents the ratio of hadronisation fractions of the B0s and B0 mesons.| File | Dimensione | Formato | |
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2017-AR-56-Updated_Br_Frac_Meas_of_B0s_to_K0S_hp_hm_Decays-JHEP.pdf
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