Evidence for the existence of a flavor-sextet charmed meson?

Abstract

Recently, the LHCb Collaboration reported a signal for a new resonance in the $D_s^{+}{\pi }^{\pm }$ invariant mass distribution in the decays $B\to {\bar{D}}^{(\ast )}{D}_s^{+}{\pi }^{+}{\pi }^{-}$ (arXiv:2411.03399). This could be a direct observation of an SU(3) flavor-sextet charmed meson with $J^P=0^{+}$. Such an SU(3) multiplet, is beyond the conventional quark-antiquark picture, and thus a verification of this observation is important.

4 pages, 1 figure. View article commissioned for Science Bulletin on the LHCb paper arXiv:2411.03399

References in corpus (8)

• Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach
• Amplitude analysis of $B^{-}\to D^{+}{\pi }^{-}{\pi }^{-}$ decays
• $DK$ $I=0,$ $D\bar{K}$ $I=0,1$ scattering and the $D_{s0}^{\ast }(2317)$ from lattice QCD
• Implications of chiral symmetry on $S$-wave pionic resonances and the scalar charmed mesons
• $DK/D\pi$ scattering and an exotic virtual bound state at the $SU(3)$ flavour symmetric point from lattice QCD
• Isospin-conserving hadronic decay of the $D_{s1}(2460)$ into $D_s{\pi }^{+}{\pi }^{-}$
• Study of $D_{s1}(2460{)}^{+}\to D_s^{+}{\pi }^{+}{\pi }^{-}$ in $B\to {\bar{D}}^{(\ast )}{D}_s^{+}{\pi }^{+}{\pi }^{-}$ decays
• Are compact open-charm tetraquarks consistent with recent lattice results?