ObservedDs(2317)and TentativeD(2100–2300)as the Charmed Cousins o

Abstract

The very recently observed D * sJ (2317) + meson is described as a quasi-bound scalar cs state in a unitarized meson model, owing its existence to the strong 3 P 0 OZI-allowed coupling to the nearby S-wave DK threshold. By the same mechanism, a scalar D * 0 (2100-2300) resonance is predicted above the Dπ threshold. These scalars are the charmed cousins of the light scalar nonet f 0 (600), f 0 (980), K * 0 (800), and a 0 (980), reproduced by the same model. The standard cn and cs charmed scalars D 0 and D s0

$$D^*_{s0}(2317)$$ D s 0 ∗ ( 2317 ) and $$\textit{DK}$$ DK scattering in B decays from BaBar and LHCb data

“…Because of its low mass, the structure of this meson has been extensively discussed. The suggested interpretations cover a wide range: cs state [11][12][13][14][15][16], two-meson molecular state [17][18][19][20][21][22][23][24][25][26][27], K -D mixing [28], four-quark states [29][30][31][32][33] or a mixture between two-meson and four-quark states [34].…”

Reanalysis of lattice QCD spectra leading to the D s0 ∗ (2317) and D s1 ∗ (2460)

“…[22,23] when we give details of the coupled-channel formulation). Alternative scenarios for a non qq structure of these states have been also given [30][31][32][33][34][35]. With two channels and three energy levels one is forced to treat the three components of the coupled-channel potential (V 11 , V 12 , V 22 ) as being energy independent.…”

Strong and radiative decays of theDs0*(2317)meson in theDK-molecule picture

“…Including the heavy flavor meson sector other possible molecular states can arise. For example, the scalar and axial charm D * s0 (2317), D s1 (2460) and bottom B * s0 (5725) and B s1 (5778) mesons can be treated as DK, D * K, BK and B * K bound states [7,8,10,11,12], respectively. Other candidates for a hadronic molecule interpretation are the X(3872) as a D 0D * 0 + charge conjugate (c.c) bound state, Y (4260) as a DD 1 -c.c.…”

“…Therefore, in addition to the standard quark-antiquark picture alternative interpretation of the D * s0 (2317) and D s1 (2460) mesons have been suggested: four-quark states, mixing of two-and four-quark states, two-diquark states and two-meson molecular states. Up to now different properties of the D * s0 (2317) and D s1 (2460) mesons (masses, strong, radiative and weak decay constants and widths) have been calculated using different approaches [7], [10]- [12], [22]- [53]: quark models, effective Lagrangian approaches, QCD sum rules, lattice QCD, etc.…”