On chiral excitations with exotic quantum numbers

We consider the flavour sextet of charmed meson resonances with JP=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 comp...

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Bibliographic Details
Main Authors: Xiao-Yu Guo, Yonggoo Heo, M.F.M. Lutz
Format: Article
Language:English
Published: Elsevier 2019-04-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269319301182
Description
Summary:We consider the flavour sextet of charmed meson resonances with JP=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 is foreseen in the s-wave πD⁎ phase shift and the ηD⁎ invariant mass distribution. For physical quark masses a rapid variation of the phase shift in-between the ηD⁎ and the K¯Ds⁎ thresholds is predicted. Keywords: Chiral symmetry, Coupled-channel dynamics, Lattice QCD
ISSN:0370-2693