Measurement of absolute branching fractions of Ds+ hadronic decays

Abstract

Using e⁺e⁻ collision data collected at the BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV, corresponding to an integrated luminosity of 7.33 fb⁻¹, we determine the absolute branching fractions of fifteen hadronic $D_s^{+}$ decays with a double-tag technique. In particular, we make precise measurements of the branching fractions $\mathcal{B}\left(D_s^{+}\to K^{+}{K}^{-}{\pi }^{+}\right)=\left(5.49\pm 0.04\pm 0.07\right)\%$, $\mathcal{B}\left(D_s^{+}\to K_S^0{K}^{+}\right)=\left(1.50\pm 0.01\pm 0.01\right)\%$ and $\mathcal{B}\left(D_s^{+}\to K^{+}{K}^{-}{\pi }^{+}{\pi }^0\right)=\left(5.50\pm 0.05\pm 0.11\right)\%$, where the first uncertainties are statistical and the second ones are systematic. The CP asymmetries in these decays are also measured and all are found to be compatible with zero.