TY  - JOUR
AU  - Albaladejo, M.
AU  - Fernandez-Soler, P.
AU  - Nieves, J.
AU  - Ortega, P. G.
PY  - 2018
DA  - 2018//
TI  - Contribution of constituent quark model c(s)over-bar states to the dynamics of the D*s0 (2317) and Ds1(2460) resonances
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 722 - 22pp
VL  - 78
IS  - 9
PB  - Springer
AB  - The masses of the D*(s0) (2317) and D-s1(2460) resonances lie below the DK and D* K thresholds respectively, which contradicts the predictions of naive quark models and points out to non-negligible effects of the D(*) K loops in the dynamics of the even-parity scalar (J(pi) = 0(+)) and axial-vector (J(pi) = 1(+)) c (s) over bar systems. Recent lattice QCD studies, incorporating the effects of the D(*) K channels, analyzed these spin-parity sectors and correctly described the D*(s0)(2317) – D-s1(2460) mass splitting. Motivated by such works, we study the structure of the D*(s0)(2317) and D-s1(2460) resonances in the framework of an effective field theory consistent with heavy quark spin symmetry, and that incorporates the interplay between D(*) K meson-meson degrees of freedom and bare P-wave c (s) over bar states predicted by constituent quark models. We extend the scheme to finite volumes and fit the strength of the coupling between both types of degrees of freedom to the available lattice levels, which we successfully describe. We finally estimate the size of the D(*) K two-meson components in the D*(s0)(2317) and D-s1(2460) resonances, and we conclude that these states have a predominantly hadronic-molecular structure, and that it should not be tried to accommodate these mesons within c (s) over bar constituent quark model patterns.
SN  - 1434-6044
UR  - http://arxiv.org/abs/1805.07104
UR  - https://doi.org/10.1140/epjc/s10052-018-6176-3
DO  - 10.1140/epjc/s10052-018-6176-3
LA  - English
N1  - WOS:000443822000003
ID  - Albaladejo_etal2018
ER  -