The spectrum of Ds mesons from lattice QCD

Abstract

The spectrum of orbitally excited D s mesons is computed in the continuum limit of quenched lattice QCD. The results are consistent with the interpretation that the narrow resonance in the D s π 0 channel discovered by the BABAR Collaboration is a J P = 0 + cs meson. Furthermore, within statistical errors, the 1 + − 1 − and the 0 + − 0 − mass splittings are equal, in agreement with the chiral multiplet structure predicted by heavy hadron chiral effective theory. On our coarsest lattice we present results from the first study of orbitally excited D s mesons with two flavors of dynamical quarks, with mass slightly larger than the strange quark mass. These results are consistent with the quenched data.

Open-charm meson spectroscopy

“…The quenched lattice QCD calculation of the spectrum of orbitally excited D s mesons of Ref. [38] concludes that, although the results obtained are consistent with a cs configuration, the statistical and systematical uncertainties are too large to exclude the exotic states based on potential quark models [4]. The same situation may be drawn from heavy quark symmetry arguments.…”

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

“…(13). For the separate fits to the LHCb and BaBar data we get P DK = 74 +7 −6 +9 −1 % and 67 +5 −7 +6 −10 %, respectively, whereas the combined fit gives P DK = 70 +4 −6 +4 −8 %.…”

“…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].…”

Study of D J meson decays to D +π−, D 0π+ and D ∗+π− final states in pp collisions

“…However, the calculation of hadronic quantities for dynamical light quarks is still a challenging task and different results are obtained [12][13][14][15][16][17].…”