Study of $D^{+}\to K^{-}{\pi }^{+}{e}^{+}{\nu }_e$

Abstract

We present an analysis of the decay $D^{+}\to K^{-}{\pi }^{+}{e}^{+}{\nu }_e$ based on data collected by the BESIII experiment at the $\psi (3770)$ resonance. Using a nearly background-free sample of 18262 events, we measure the branching fraction $\mathcal{B}(D^{+}\to K^{-}{\pi }^{+}{e}^{+}{\nu }_e)=(3.71\pm 0.03\pm 0.08)\%$. For $0.8<m_{K\pi }<1.0$ GeV/$c^2$ the partial branching fraction is $\mathcal{B}(D^{+}\to K^{-}{\pi }^{+}{e}^{+}{\nu }_e{)}_{[0.8,1]}=(3.33\pm 0.03\pm 0.07)\%$. A partial wave analysis shows that the dominant ${\bar{K}}^{\ast }(892{)}^0$ component is accompanied by an \emph{S}-wave contribution accounting for $(6.05\pm 0.22\pm 0.18)\%$ of the total rate and that other components are negligible. The parameters of the ${\bar{K}}^{\ast }(892{)}^0$ resonance and of the form factors based on the spectroscopic pole dominance predictions are also measured. We also present a measurement of the ${\bar{K}}^{\ast }(892{)}^0$ helicity basis form factors in a model-independent way.

arXiv comment17 pages, 6 figures

References in corpus (21)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Heavy-to-Light Form Factors in the Final Hadron Large Energy Limit of QCD
• Measurement of the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\pi }^{+}{\pi }^{-}$ Cross Section between 600 and 900 MeV Using Initial State Radiation
• Semileptonic B decays to excited charmed mesons
• Semi-leptonic Decays of Heavy Flavours on a Fine Grained Lattice
• Lattice Calculation of D- and B-meson Semileptonic Decays, using the Clover Action at beta=6.0 on APE
• Evidence for new interference phenomena in the decay D+ to K- pi+ mu+ nu
• Measurement of the Hadronic Form Factor in D0 --> K- e+ nue Decays
• Measurement of the q2 dependence of the Hadronic Form Factor in D0 --> K- e+ nu_e decays
• Analysis of the D+ --> K- pi+ e+ nu_e decay channel
• An ``Improved" Lattice Study of Semi-leptonic Decays of D-Mesons
• Heavy to light vector meson semileptonic decays
• New Measurements of the D+ to K* mu nu Form Factor Ratios
• Hadronic Mass Spectrum Analysis of D+ into K- pi+ mu+ nu Decay and Measurement of the K*(892)^0 Mass and Width
• Study of Polarization in B -> VT Decays
• Analysis of D+ to K- pi+ e+ nu_e and D+ to K- pi+ mu+ nu_mu Semileptonic Decays
• A Non-parametric Approach to the D+ to K*0bar mu+ nu Form Factors
• Lattice analysis of semi-leptonic form factors
• Weak Decays of Heavy-Light Mesons on the Lattice: Semi-Leptonic Formfactors

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• Determination of the absolute branching fractions of $D^0\to K^{-}{e}^{+}{\nu }_e$ and $D^{+}\to {\bar{K}}^0{e}^{+}{\nu }_e$
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• Observation of $D^{+}\to K_S^0{\pi }^0{\mu }^{+}{\nu }_{\mu }$, Test of Lepton Flavor Universality and First Angular Analysis of $D^{+}\to {\bar{K}}^{\ast }(892{)}^0{\ell }^{+}{\nu }_{\ell }$
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• Precise $K^{\ast }(892)\to K\pi$ branching fractions