On chiral excitations with exotic quantum numbers

Abstract

We consider the flavour sextet of charmed meson resonances with J^P= 1^+ quantum numbers that is predicted by the leading order chiral Lagrangian with up, down and strange quarks. The effect of chiral correction terms as determined previously from QCD lattice data is worked out. Pole masses in the complex energy plane are derived. The most promising signal from such states accessible in experiments like Belle, LHCb and PANDA are foreseen in the s-wave pi D* phase shift and the eta D* invariant mass distribution. For physical quark masses a rapid variation of the phase shift in between the eta D* and the bar K Ds* thresholds is predicted.

14 pages, three figures - published version

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Cited by in corpus (10)

• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Coupled-channel dynamics with chiral long-range forces in the open-charm sector of QCD
• Axial-vector $D_1$ hadrons in $D^{\ast }\pi$ scattering from QCD
• A coupled-channel system with anomalous thresholds and unitarity
• $D_1$ and $D_2$ resonances in coupled-channel scattering amplitudes from lattice QCD
• A fixed point can hide another one: the nonperturbative behavior of the tetracritical fixed point of the O($N$) models at large $N$
• Hadronic molecules and multiquark states
• Chiral excitations of open-beauty systems
• On chiral extrapolations of coupled-channel reaction dynamics for charmed mesons
• Implication of chiral symmetry for the heavy-light meson spectroscopy