Search for the decay $D_s^{+}\to a_0(980{)}^0{e}^{+}{\nu }_e$

Abstract

Using 6.32 fb${}^{-1}$ of electron-positron collision data recorded by the BESIII detector at center-of-mass energies between 4.178 and 4.226~GeV, we present the first search for the decay $D_s^{+}\to a_0(980{)}^0{e}^{+}{\nu }_e,a_0(980{)}^0\to {\pi }^0\eta$, which could proceed via $a_0(980)$-$f_0(980)$ mixing. No significant signal is observed. An upper limit of $1.2\times 10^{-4}$ at the $90\%$ confidence level is set on the product of the branching fractions of $D_s^{+}\to a_0(980{)}^0{e}^{+}{\nu }_e$ and $a_0(980{)}^0\to {\pi }^0\eta$ decays.

arXiv comment9 pages, 4 figures

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• Semileptonic decays $D\to \eta \pi e^{+}{\nu }_e$ in the $a_0(980)$ region
• 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
• Four-body Semileptonic Charm Decays $D\to P_1{P}_2{\ell }^{+}{\nu }_{\ell }$ Based on SU(3) Flavor Analysis
• Search for hyperon $\Delta S=\Delta Q$ violating decay ${\Xi }^0\to {\Sigma }^{-}{e}^{+}{\nu }_e$
• 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
• Transition form factors for $D/B$ to $a_0(980)$ from light-cone QCD sum rules