Observation of $D^{+}\to K_S^0{a}_0(980{)}^{+}$ in the amplitude analysis of $D^{+}\to K_S^0{\pi }^{+}\eta$

Abstract

We perform for the first time an amplitude analysis of the decay $D^{+}\to K_S^0{\pi }^{+}\eta$ and report the observation of the decay $D^{+}\to K_S^0{a}_0(980{)}^{+}$ using 2.93 fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data taken at a center-of-mass energy of 3.773 GeV with the BESIII detector. As the only W-annihilation free decay among $D$ to $a_0(980)$-pseudoscalar, $D^{+}\to K_S^0{a}_0(980{)}^{+}$ is the ideal decay to extract the contributions of the external and internal $W$-emission amplitudes involving $a_0(980)$ and study the final-state interactions. The absolute branching fraction of $D^{+}\to K_S^0{\pi }^{+}\eta$ is measured to be $(1.27\pm 0.04_{stat.}\pm 0.03_{syst.})\%$. The product branching fractions of $D^{+}\to K_S^0{a}_0(980{)}^{+}$ with $a_0(980{)}^{+}\to {\pi }^{+}\eta$ and $D^{+}\to {\pi }^{+}{K}_0^{\ast }(1430{)}^0$ with $K_0^{\ast }(1430{)}^0\to K_S^0\eta$ are measured to be $(1.33\pm 0.05_{stat.}\pm 0.04_{syst.})\%$ and $(0.14\pm 0.03_{stat.}\pm 0.01_{syst.})\%$, respectively.

References in corpus (38)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• QCD Factorization in B -> pi K, pi pi Decays and Extraction of Wolfenstein Parameters
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• sPlot: a statistical tool to unfold data distributions
• Future Physics Programme of BESIII
• Method for detector description transformation to Unity and application in BESIII
• Two-body hadronic charmed meson decays
• Hadronic D Decays Involving Scalar Mesons
• Revisiting CP violation in $D\to PP$ and $VP$ decays
• The low lying scalar resonances in the $D^0$ decays into $K_s^0$ and $f_0(500)$, $f_0(980)$, $a_0(980)$
• Study of the Standard Model with weak decays of charmed hadrons at BESIII
• Recent Progress in Leptonic and Semileptonic Decays of Charmed Hadrons
• Predictions for nonleptonic Lambda_b and Theta_b decays
• Dalitz plot analysis of Ds+ --> K+ K- pi+
• Charm nonleptonic decays and final state interactions
• The Scalar Meson f0(980) in Heavy-Meson Decays
• Amplitude analysis of the ${\chi }_{c1}\to \eta {\pi }^{+}{\pi }^{-}$ decays
• Resonant $a_0(980)$ state in triangle rescattering $D_s^{+}\to {\pi }^{+}{\pi }^0\eta$ decays
• Parameter uncertainties in weighted unbinned maximum likelihood fits
• Hadronic D decays involving even-parity light mesons
• Amplitude analysis of $D_s^{+}\to {\pi }^{+}{\pi }^0\eta$ and first observation of the pure $W$-annihilation decays $D_s^{+}\to a_0(980{)}^{+}{\pi }^0$ and $D_s^{+}\to a_0(980{)}^0{\pi }^{+}$
• Measurement of $\cos 2\beta$ in $B^0\to D^{(\ast )}{h}^0$ with $D\to K_S^0{\pi }^{+}{\pi }^{-}$ decays by a combined time-dependent Dalitz plot analysis of BaBar and Belle data
• Observation of $a_0(1710{)}^{+}\to K_S^0{K}^{+}$ in study of the $D_s^{+}\to K_S^0{K}^{+}{\pi }^0$ decay
• ${\Lambda }_b\to p$ transition form factors in perturbative QCD
• Dalitz plot studies of D0 --> K0S pi+ pi- decays in a factorization approach
• Amplitude analysis of $D^0\to K^{-}{\pi }^{+}{\pi }^{+}{\pi }^{-}$
• Hadronic three-body D decays mediated by scalar resonances
• Interference phenomena in the decay $D_s^{+}\to \eta {\pi }^0{\pi }^{+}$ induced by the $a_0^0(980)-f_0(980)$ mixing
• Role of the scalar $f_0(980)$ in the process $D_s^{+}\to {\pi }^{+}{\pi }^0{\pi }^0$
• Scalar resonances in a unitary $\pi -\pi$ $S$-wave model for $D^{+}\to {\pi }^{+}{\pi }^{-}{\pi }^{+}$
• Amplitude analysis and branching-fraction measurement of $D_s^{+}\to K_S^0{K}^{-}{\pi }^{+}{\pi }^{+}$
• Semileptonic decays $D\to \eta \pi e^{+}{\nu }_e$ in the $a_0(980)$ region
• Amplitude analysis and branching fraction measurement of the decay $D_s^{+}\to {\pi }^{+}{\pi }^0{\pi }^0$
• Amplitude analysis and branching fraction measurement of the decay \boldmath $D_s^{+}\to K^{+}{\pi }^{+}{\pi }^{-}{\pi }^0$
• Four-body baryonic $B\to {\mathbf{B}}_1{\bar{\mathbf{B}}}_1^{\prime }{\mathbf{B}}_2{\bar{\mathbf{B}}}_2^{\prime }$ decays
• Amplitude Analysis and Branching Fraction Measurement of $D^0\to K^{-}{\pi }^{+}{\pi }^0{\pi }^0$
• Amplitude analysis and branching fraction measurement of $D_s^{+}\to K^{-}{K}^{+}{\pi }^{+}{\pi }^{+}{\pi }^{-}$

Cited by in corpus (5)

• Evidence of the low-lying baryon ${\Sigma }^{\ast }(1/2^{-})$ in the process ${\Lambda }_c^{+}\to \eta {\pi }^{+}\Lambda$
• Algorithms for partial wave amplitudes under covariant $L$-$S$ scheme
• Study of the light scalar $a_0(980)$ through the decay $D^0\to a_0(980{)}^{-}{e}^{+}{\nu }_e$ with $a_0(980{)}^{-}\to \eta {\pi }^{-}$
• Roles of $a_0(980)$ and $a_0(1710)$ in Cabibbo-suppressed process $D^{+}\to {\pi }^0{\pi }^{+}\eta$
• 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