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

2025/04/30 by Guo, Feng-Kun, Zou, Bing-Song
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2504.21442

Abstract

Recently, the LHCb Collaboration reported a signal for a new resonance in the D_s⁺ π^± invariant mass distribution in the decays B→ D^(*) D_s⁺ π⁺ π^- (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.

Citations

• Are compact open-charm tetraquarks consistent with recent lattice results?
• Study of D_s1(2460)⁺→ D_s⁺π⁺π^- in B→ D^(*)D_s⁺π⁺π^- decays
• Light Vector Mesons
• Dynamically generated 0⁺ heavy mesons in a heavy chiral unitary approach
• A Comprehensive Four-Quark Interpretation of D_s(2317), D_s(2457) and D_s(2632)
• On heavy-light meson resonances and chiral symmetry
• Implications of a DK Molecule at 2.32 GeV
• Review of Particle Physics

Related

• Observation of a new excited charm-strange meson D_s1(2933)⁺ in B⁰→ D⁺ D^- K⁺ π^- decays
• Open charm tetraquarks in broken SU(3)_F symmetry
• Measurements of charm rare decays at LHCb
• Confirmation of the existence of an exotic state in the πD system
• Nonleptonic Charm Decays and CP Violation