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

Abstract

Using 6.32~fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data recorded by the BESIII detector at center-of-mass energies between $4.178$ to $4.226$ GeV, we present the first measurement of the decay $D_s^{+}\to f_0(980)e^{+}{\nu }_e,f_0(980)\to {\pi }^0{\pi }^0$. The product branching fraction of $D_s^{+}\to f_0(980)e^{+}{\nu }_e,f_0(980)\to {\pi }^0{\pi }^0$ is measured to be $(7.9\pm 1.4_{\mathrm{stat}}\pm 0.3_{\mathrm{syst}})\times 10^{-4}$, with a statistical significance of $7.8\sigma$. Furthermore, the upper limits on the product branching fractions of $D_s^{+}\to f_0(500)e^{+}{\nu }_e$ with $f_0(500)\to {\pi }^0{\pi }^0$ and the branching fraction of $D_s^{+}\to K_S^0{K}_S^0{e}^{+}{\nu }_e$ are set to be $7.3\times 10^{-4}$ and $3.8\times 10^{-4}$ at 90\% confidence level, respectively. Our results provide valuable inputs to the understanding of the structures of light scalar mesons.

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• Study of $\mathbf{D}\to {\mathbf{a}}_0(980){\mathbf{e}}^{+}{\mathbf{\nu }}_{\mathbf{e}}$ decay in the light-cone sum rules approach
• Further signatures to support the tetraquark mixing framework for the two light-meson nonets
• Search for the decay $D_s^{+}\to a_0(980{)}^0{e}^{+}{\nu }_e$
• Amplitude analysis and branching-fraction measurement of \boldmath $D_s^{+}\to K_S^0{\pi }^{+}{\pi }^0$

Cited by in corpus (5)

• Recent Progress in Leptonic and Semileptonic Decays of Charmed Hadrons
• Probing $|V_{cs}|$ and lepton flavor universality through $D\to K_0^{\ast }(1430)\ell {\nu }_{\ell }$ decay
• Study of the $f_0(980)$ and $f_0(500)$ Scalar Mesons through the Decay $D_s^{+}\to {\pi }^{+}{\pi }^{-}{e}^{+}{\nu }_e$
• Four-body Semileptonic Charm Decays $D\to P_1{P}_2{\ell }^{+}{\nu }_{\ell }$ Based on SU(3) Flavor Analysis
• Transition form factors for $D/B$ to $a_0(980)$ from light-cone QCD sum rules