Amplitude analysis and branching-fraction measurement of \boldmath $D_s^{+}\to K_S^0{\pi }^{+}{\pi }^0$

Abstract

Utilizing a data set corresponding to an integrated luminosity of 6.32~$\mathrm{f}{\mathrm{b}}^{-1}$, recorded by the BESIII detector at center-of-mass energies between 4.178 and 4.226~GeV, we perform an amplitude analysis of the decay $D_s^{+}\to K_S^0{\pi }^{+}{\pi }^0$ and determine the relative fractions and phase differences of different intermediate processes, which include $K_S^0\rho (770{)}^{+}$, $K_S^0\rho (1450{)}^{+}$, $K^{\ast }(892{)}^0{\pi }^{+}$, $K^{\ast }(892{)}^{+}{\pi }^0$, and $K^{\ast }(1410{)}^0{\pi }^{+}$. Using a double-tag technique, and making an efficiency correction that relies on our knowledge of the phase-space distribution of the decays coming from the amplitude analysis, the absolute branching fraction is measured to be $\mathcal{B}(D_s^{+}\to K_S^0{\pi }^{+}{\pi }^0)=(5.43\pm 0.30_{\text{stat}}\pm 0.15_{\text{syst}})\times 10^{-3}$.

References in corpus (1)

• Revisiting CP violation in $D\to PP$ and $VP$ decays

Cited by in corpus (6)

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• Study of light scalar mesons through $D_s^{+}\to {\pi }^0{\pi }^0{e}^{+}{\nu }_e$ and $K_S^0{K}_S^0{e}^{+}{\nu }_e$ decays
• Analytic structure of the high-energy gravitational amplitude: multi-H diagrams and classical 5PM logarithms
• Precise $K^{\ast }(892)\to K\pi$ branching fractions
• Study of $\varphi \to K\bar{K}$ and $K_S^0-K_L^0$ Asymmetry in the Amplitude Analysis of $D_s^{+}\to K_S^0{K}_L^0{\pi }^{+}$ Decays