Open-charm meson resonances with negative strangeness

Abstract

We study heavy-light meson resonances with quantum numbers J^P=0^+ and J^P=1^+ in terms of the non-linear chiral SU(3) Lagrangian. Adjusting the free parameters that arise at subleading order to reproduce the mass of the D(2420) resonance as well as the new states established recently by the BABAR, CLEO and BELLE collaborations we obtain refined masses for the anti-triplet and sextet states. Bound states of antikaons at the D(1867) and D(2008) mesons are predicted at 2352 MeV (J^P=0^+) and 2416 MeV (J^P=1^+). In addition we anticipate a narrow scalar state of mass 2389 MeV with (I,S)=(1/2,0)Comment: 12 pages, 3 figure

New insights into theDs0*(2317)and other charm scalar mesons

“…The second-Riemann-sheet pole is consistent with the observations made in by Refs. [14][15][16]19]. This pole can be regarded as a broad D * 0 (0, 1 2 ) state strongly coupled to the Dπ threshold.…”

“…Therefore we consider it is a good approximation to exclude the vector D * mesons when focusing only on the S-wave charmed D meson and pNGB scattering. Within the framework of covariant heavy meson χPT by taking the D (s) and the octet of pNGBs as the dynamical fields, the leading order (LO) [14][15][16], next-to-leading order (NLO) [12,13,[17][18][19] and next-to-next-to-leading order (NNLO) [20,21] calculations have been performed to investigate the properties of D * s0 (2317). The pole trajectories with varying up/down-and strange-quark masses are useful quantities to further probe the inner structure of the hadrons, e.g.…”

One-loop analysis of the interactions between charmed mesons and Goldstone bosons

“…Those diagrams vanishing in the heavy quark limit are suppressed by 1/m c and therefore are neglected. We denote the vector charmed mesons by D * = (D * 0 , D * + , D * + s ), and the vertices involved in figure 7 are described by the following Lagrangian, 10) where the covariant derivatives acting on D * are analogous to those defined in eq. (2.10).…”

“…There are two points to be discussed before carrying out the fits. 9 The mass of the η is always expressed in terms of Mπ and MK through the Gell-Mann-Okubo mass 10 We have neglected the subtleties due to the use of mixed action gauge configurations in the lattice calculations, which in principle requires to use the partially quenched ChPT instead of the standard one for the chiral extrapolation, and the effect of finite lattice spacing, see ref. [48].…”

Chiral Unitary Dynamics of Hadrons and Hadrons in a Nuclear Medium

“…This field has proved quite productive and has been further extended by combining pseudoscalar mesons with vector mesons, which lead to the dynamical generation of axial vector mesons like the a 1 (1260), b 1 (1235), etc 16,17 . Also in the charm sector one has obtained in this way scalar mesons with charm, like the D s0 (2317) 18,19,20,21 , axial vector mesons with charm like the D s1 (2460) 16,22,23 , or hidden charm scalars like a predicted X(3700) state and two hidden charm axial states, with opposite C-parity, one of which corresponds to the X(3872) state. In what follows we briefly discuss these latter cases.…”