Strong and radiative decays of the $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$

Abstract

Since their discovery in 2003, the open charm states $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ provide a challenge to the conventional quark model. In recent years, theoretical evidence has been accumulated for both states in favor of a predominantly $DK$ and $D^{\ast }K$ molecular nature, respectively. However, a direct experimental proof of this hypothesis still needs to be found. Since radiative decays are generally believed to be sensitive to the inner structure of the decaying particles, we study in this work the radiative and strong decays of both the $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$, as well as of their counterparts in the bottom sector. While the strong decays are indeed strongly enhanced for molecular states, the radiative decays are of similar order of magnitude in different pictures. Thus, the experimental observable that allows one to conclusively quantify the molecular components of the $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ is the hadronic width, and not the radiative one, in contradistinction to common belief. We also find that radiative decays of the sibling states in the bottom sector are significantly more frequent than the hadronic ones. Based on this, we identify their most promising discovery channels.

References in corpus (21)

• Dynamically Generated Open and Hidden Charm Meson Systems
• Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach
• Strong and radiative decays of the Ds0*(2317) meson in the DK-molecule picture
• Dynamically generated 1^+ heavy mesons
• $D_s$ mesons with $DK$ and $D^{\ast }K$ scattering near threshold
• Axial Resonances in the Open and Hidden Charm Sectors
• Radiative and isospin-violating decays of Ds mesons in the hadrogenesis conjecture
• D* K molecular structure of the Ds1(2460) meson
• Subleading contributions to the width of the D_{s0}*(2317)
• Implications of heavy quark spin symmetry on heavy meson hadronic molecules
• Possible S-wave Bound-States of Two Pseudoscalar Mesons
• Two-photon decays of hadronic molecules
• Light meson mass dependence of the positive parity heavy-strange mesons
• Molecular structure of the Bs0*(5725) and Bs1(5778) bottom-strange mesons
• Radiative decays of the $D_{s0}(2317)$, $D_{s1}(2460)$ and the related strong coupling constants
• Structure of the $(0^{+},1^{+})$ mesons $B_{s0}$ and $B_{s1}$, and the strong coupling constants $g_{B_{s0}BK}$ and $g_{B_{s1}{B}^{\ast }K}$
• Radiative decay of the dynamically generated open and hidden charm scalar meson resonances D_{s0}^*(2317) and X(3700)
• Near Mass Degeneracy in the Scalar Meson Sector: Implications for $B_{(s)0}^{\ast }$ and $B_{(s)1}^{\prime }$ Mesons
• Mass splittings within heavy baryon isospin multiplets in chiral perturbation theory
• Reanalysis of the (0^+,1^+) states B_{s0} and B_{s1} with QCD sum rules
• Radiative decays of the $(0^{+},1^{+})$ strange-bottom mesons

Cited by in corpus (5)

• What can radiative decays of the X(3872) teach us about its nature?
• $D_{s0}^{\ast \pm }(2317)$ and $KD$ scattering from $B_s^0$ decay
• Reanalysis of lattice QCD spectra leading to the $D_{s0}^{\ast }(2317)$ and $D_{s1}^{\ast }(2460)$
• Status and perspectives for $\bar{P}ANDA$ at FAIR
• Perspectives of Open Charm Physics at $\bar{P}ANDA$