Electromagnetic Dalitz Decays of $D_{(s)}^{\ast }$ Mesons

Abstract

Rare electromagnetic decays of charmed mesons are useful laboratories to explore the structure of hadronic states and the interactions between photon and charmed mesons, to test the chiral perturbation theory in flavor sector and to search for new physics including dark photons. In this paper, we calculate the relative branching ratios of electromagnetic Dalitz decays $D_{(s)}^{\ast }\to D_{(s)}{\ell }^{+}{\ell }^{-}$ to their corresponding radiative decays $D_{(s)}^{\ast }\to D_{(s)}\gamma$, the dileptonic invariant mass spectra and the leptonic angular distributions with transition form factor in Vector-Meson Dominance model, where $D_{(s)}^{\ast }$ represents $D^{\ast }(2007{)}^0$, $D^{\ast }(2010{)}^{\pm }$, $D^{\ast }(2640{)}^{\pm }$, $D_s^{\ast \pm }$, $D_{s1}^{\ast }(2700{)}^{\pm }$ and $D_{s1}^{\ast }(2860{)}^{\pm }$.

9 pages, 12 figures

References in corpus (5)

• The Dark Photon
• Constraints on sub-GeV hidden sector gauge bosons from a search for heavy neutrino decays
• Study of the electromagnetic transition form-factors in η-> μ^+μ^-γand ω-> μ^+μ^-π^0 decays with NA60
• Tests of the Atomki anomaly in lepton pair decays of heavy mesons
• Hadronic loop effects on the radiative decays of the first radial excitations of $\eta$ and ${\eta }^{\prime }$

Cited by in corpus (2)

• Probing the ATOMKI X17 vector boson using Dalitz decays $V\to P{e}^{+}{e}^{-}$
• Radiative and Dalitz decays of ${\rm Y}(1S)$ in the light of the ATOMKI X17 anomaly