Measurement of branching fractions for $D$ meson decaying into $\varphi$ meson and a pseudoscalar meson

Abstract

The four decay modes $D^0\to \varphi {\pi }^0$, $D^0\to \varphi \eta$, $D^{+}\to \varphi {\pi }^{+}$, and $D^{+}\to \varphi K^{+}$ are studied by using a data sample taken at the centre-of-mass energy $\sqrt{s}=3.773$~GeV~with the BESIII detector, corresponding to an integrated luminosity of 2.93 fb${}^{-1}$. The branching fractions of the first three decay modes are measured to be $\mathcal{B}(D^0\to \varphi {\pi }^0)=(1.168\pm 0.028\pm 0.028)\times 10^{-3}$, $\mathcal{B}(D^0\to \varphi \eta )=(1.81\pm 0.46\pm 0.06)\times 10^{-4}$, and $\mathcal{B}(D^{+}\to \varphi {\pi }^{+})=(5.70\pm 0.05\pm 0.13)\times 10^{-3}$, respectively, where the first uncertainties are statistical and the second are systematic. No significant signal is observed of the decay $D^{+}\to \varphi K^{+}$ and the upper limit of its branching fraction is set for the first time, to be $2.1\times 10^{-5}$ at the $90\%$ confidence level. The ratio of $\mathcal{B}(D^0\to \varphi {\pi }^0)$ to $\mathcal{B}({\mathcal{D}}^{+}\to \varphi {\pi }^{+})$ is calculated to be $(20.49\pm 0.50\pm 0.45)\%$, which is consistent with the theoretical prediction based on isospin symmetry between these two decay modes.

References in corpus (4)

• Measurement of e+e- --> D Dbar Cross Sections at the psi(3770) Resonance
• Measurements of absolute branching fractions for $D$ mesons decays into two pseudoscalar mesons
• Dalitz plot analysis of the $D^{+}\to K^{-}{K}^{+}{K}^{+}$ decay
• Measurement of the branching fractions of the decays $D^{+}\to K^{-}{K}^{+}{K}^{+}$, $D^{+}\to {\pi }^{-}{\pi }^{+}{K}^{+}$ and $D_s^{+}\to {\pi }^{-}{K}^{+}{K}^{+}$

Cited by in corpus (3)

• Revisiting CP violation in $D\to PP$ and $VP$ decays
• Measurement of branching fractions and search for $CP$ violation in $D^0\to {\pi }^{+}{\pi }^{-}\eta$, $D^0\to K^{+}{K}^{-}\eta$, and $D^0\to \varphi \eta$ at Belle
• Search for intermediate resonances and dark gauge bosons in $J/\psi \to \gamma {\pi }^0{\eta }^{\prime }$