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- W2949882966 abstract "We measure absolute branching fractions for six exclusive $D_s$ semileptonic decays. We use data collected in the CLEO-c detector from $e^+e^-$ annihilations delivered by the Cornell Electron Storage Ring with a center-of-mass energy near 4170 MeV. We find $mathcal{B}(D_s to phi e nu)~= (2.14 pm 0.17 pm 0.09)$%, $mathcal{B}(D_s to eta e nu)~= (2.28 pm 0.14 pm 0.20)$%, and $mathcal{B}(D_s to eta' e nu)~= (0.68 pm 0.15 pm 0.06)$% for the largest modes, where the first uncertainties are statistical and the second are systematic. We also obtain $mathcal{B}(D_s to K^0 e nu)~= (0.39 pm 0.08 pm 0.03)$%, $mathcal{B}(D_s to K^* e nu)~= (0.18 pm 0.04 pm 0.01)$%, and $mathcal{B}(D_s to f_0 e nu, f_0 to pipi)~= (0.13 pm 0.02 pm 0.01)$% for $f_0$ masses within 60 MeV of 980 MeV. We use our results to determine the $eta-eta'$ and $f_0$ mixing angles with $sbar{s}$, and we combine our results with lattice calculations to estimate $|V_{cs}|$. This measurement improves upon the $D_s$ semileptonic branching ratio precision and provides a new approach for future work that eliminates the $D_s^*$ daughter photon reconstruction." @default.
- W2949882966 created "2019-06-27" @default.
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- W2949882966 date "2015-05-15" @default.
- W2949882966 modified "2023-10-09" @default.
- W2949882966 title "Exclusive $D_s$ semileptonic branching fraction measurements" @default.
- W2949882966 hasPublicationYear "2015" @default.
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