%0 Journal Article
%T Two-pole structure of the D-0*(2400)
%A Albaladejo, M.
%A Fernandez-Soler, P.
%A Guo, F. K.
%A Nieves, J.
%J Physics Letters B
%D 2017
%V 767
%I Elsevier Science Bv
%@ 0370-2693
%G English
%F Albaladejo_etal2017
%O WOS:000397861700070
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3025), last updated on Tue, 12 Dec 2017 16:01:18 +0000
%X The so far only known charmed non-strange scalar meson is dubbed as D-0(*)(2400) in the Review of Particle Physics. We show, within the framework of unitarized chiral perturbation theory, that there are in fact two (I = 1/2, J(P) = 0(+)) poles in the region of the D-0(*)( 2400) in the coupled-channel D pi, D eta and D-s (K) over bar scattering amplitudes. With all the parameters previously fixed, we predict the energy levels for the coupled-channel system in a finite volume, and find that they agree remarkably well with recent lattice QCD calculations. This successful description of the lattice data is regarded as a strong evidence for the two-pole structure of the D-0(*)( 2400). With the physical quark masses, the poles are located at (2105(-8)(+6) – i102(-12)(+10)) MeV and (2451(-26)(+36) – i134(-8)(+7)) MeV, with the largest couplings to the D pi and D-s (K) over bar channels, respectively. Since the higher pole is close to the D-s (K) over bar threshold, we expect it to show up as a threshold enhancement in the D-s (K) over bar invariant mass distribution. This could be checked by high-statistic data in future experiments. We also show that the lower pole belongs to the same SU(3) multiplet as the D-s0(*)(2317) state. Predictions for partners in the bottom sector are also given.
%R 10.1016/j.physletb.2017.02.036
%U http://arxiv.org/abs/1610.06727
%U https://doi.org/10.1016/j.physletb.2017.02.036
%P 465-469