The nature of the orbitally excited charmed-strange mesons through nonleptonic B → D^(*)D_sJ^(*) decays

Grupo de Física Nuclear e IUFFyM, Universidad de Salamanca, E-37008 Salamanca, Spain

^a e-mail: segonza@usal.es

Abstract

The Belle Collaboration has recently reported a study of the decays B → D_s1(2536)⁺$\overline{D}(*)$ and has given also estimates of relevant ratios between branching fractions of decays B → D^(*)D_sJ^(*) providing important information to check the structure of the D_s0^*(2317), D_s1(2460) and D_s1(2536) mesons. The disagreement between experimental data and Heavy Quark Symmetry has been used as an indication that D_s0^*(2317) and D_s1(2460) mesons could have a more complex structure than the canonical $\overline{s}$ one. We analyze these ratios within the framework of a constituent quark model, which allows us to incorporate the effects given by finite c-quark mass corrections. Our findings are that while the D_s1(2460) meson could have a sizable non-$q\overline{q}$ component, the D_s0^*(2317) and D_s1(2536) mesons seem to be well described by a pure $q\overline{q}$ structure.