Observation of $a_0(1710{)}^{+}\to K_S^0{K}^{+}$ in study of the $D_s^{+}\to K_S^0{K}^{+}{\pi }^0$ decay

Abstract

Using $e^{+}{e}^{-}$ annihilation data corresponding to an integrated luminosity of 6.32 fb${}^{-1}$ collected at center-of-mass energies between 4.178 GeV and 4.226 GeV with the BESIII detector, we perform the first amplitude analysis of the decay $D_s^{+}\to K_S^0{K}^{+}{\pi }^0$ and determine the relative branching fractions and phases for intermediate processes. We observe the $a_0(1710{)}^{+}$, the isovector partner of the $f_0(1710)$ and $f_0(1770)$ mesons, in its decay to $K_S^0{K}^{+}$ for the first time. In addition, we measure the ratio $\frac{\mathcal{B}(D_s^{+}\to {\bar{K}}^{\ast }(892{)}^0{K}^{+})}{\mathcal{B}(D_s^{+}\to {\bar{K}}^0{K}^{\ast }(892{)}^{+})}$ to be $2.35_{-0.23\text{stat.}}^{+0.42}\pm 0.10_{syst.}$. Finally, we provide a precision measurement of the absolute branching fraction $\mathcal{B}(D_s^{+}\to K_S^0{K}^{+}{\pi }^0)=(1.46\pm 0.06_{\text{stat.}}\pm 0.05_{\text{syst.}})\%$.

8 pages, 3 figures

References in corpus (17)

• Future Physics Programme of BESIII
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• Scalar isoscalar mesons and the scalar glueball from radiative $J/\psi$ decays
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• Two dynamical generated $a_0$ resonances by interactions between vector mesons
• The $D_s^{+}\to {\pi }^{+}{K}_s^0{K}_s^0$ reaction \\and the $I=1$ partner of the $f_0(1710)$ state
• Theoretical study of the process $D_s^{+}\to {\pi }^{+}{K}_S^0{K}_S^0$ and the isovector partner of $f_0(1710)$
• Newly observed $a_0(1817)$ as the scaling point of constructing the scalar meson spectroscopy
• Amplitude analysis and branching-fraction measurement of \boldmath $D_s^{+}\to K_S^0{\pi }^{+}{\pi }^0$
• Search for the decay $D_s^{+}\to a_0(980{)}^0{e}^{+}{\nu }_e$
• Amplitude analysis and branching-fraction measurement of $D_s^{+}\to K_S^0{K}^{-}{\pi }^{+}{\pi }^{+}$

Cited by in corpus (17)

• Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom
• Role of the scalar $f_0(980)$ in the process $D_s^{+}\to {\pi }^{+}{\pi }^0{\pi }^0$
• Exploring kaon induced reactions for unraveling the nature of the scalar meson $a_0(1817)$
• Observation of $D^{+}\to K_S^0{a}_0(980{)}^{+}$ in the amplitude analysis of $D^{+}\to K_S^0{\pi }^{+}\eta$
• Unveiling the $a_0(1710)$ nature in the process $J/\psi \to {\bar{K}}^0{K}^{+}{\rho }^{-}$
• Study of charmonium decays to $K_S^{0}K\pi$ in the $B\to (K_S^{0}K\pi )K$ channels
• Theoretical study of scalar meson $a_0(1710)$ in the ${\eta }_c\to {\bar{K}}^0{K}^{+}{\pi }^{-}$ reaction
• Three-body unitary coupled-channel approach to radiative $J/\psi$ decays and $\eta (1405/1475)$
• Study of $D_s^{+}\to f_0(980){\rho }^{+}$ and $\varphi {\pi }^{+}$ decays through $D_s^{+}\to {\pi }^{+}{\pi }^{+}{\pi }^{-}{\pi }^0$
• Dynamically generated states from the $\eta K^{\ast }{\bar{K}}^{\ast }$, $\pi K^{\ast }{\bar{K}}^{\ast }$, and $K{K}^{\ast }{\bar{K}}^{\ast }$ systems within the fixed-center approximation
• Two-photon production of $f_0$ and $a_0$ resonances as hadronic molecules composed of two vector mesons
• Likelihood analysis of the newly observed $f_0(2020)$, $f_0(2330)$, and $f_0(2470)$ in $J/\psi \to \gamma {\eta }^{\prime }{\eta }^{\prime }$ as high-lying unflavored scalar mesons
• Roles of $a_0(980)$ and $a_0(1710)$ in Cabibbo-suppressed process $D^{+}\to {\pi }^0{\pi }^{+}\eta$
• Amplitude Analysis of the Isospin-Violating Decay $J/\psi \to \gamma \eta {\pi }^0$
• 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
• Role of $a_0(1710)$ in the $J/\psi \to {\rho }^{+}{\rho }^{-}\omega$ and $J/\psi \to \gamma {\rho }^0\omega$ reactions