NonleptonicB→D(*)DsJ(*)decays and the natur

Abstract

The Belle Collaboration has recently reported a study of the decays B ! D s1 ð2536Þ þ " D ðÃÞ and has also given estimates of relevant ratios between branching fractions of decays B ! D ðÃÞ D ðÃÞ sJ providing important information to check the structure of the D à s0 ð2317Þ, D s1 ð2460Þ, and D s1 ð2536Þ mesons. The disagreement between experimental data and heavy quark symmetry has been used as an indication that D à s0 ð2317Þ and D s1 ð2460Þ mesons could have a more complex structure than the canonical c" 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 ð2460Þ meson could have a sizable non-q " q component, the D à s0 ð2317Þ and D s1 ð2536Þ mesons seem to be well described by a pure q " q structure.

Masses and decay constants of the Ds0*(2317) and DBali1, Collins2, Cox3 et al. 2017Phys. Rev. D108131611View full textAdd to dashboardCite

“…These results, however, are at odds with heavy quark symmetry studies which find f Ds1(2460) ∼ f D * s0 (2317) [44][45][46]. The decay constants have also been computed, for example, within quark models [45,[47][48][49][50] and QCD sum rules [51,52] with results covering a wide range, f D * s0 (2317) = 70 − 440 MeV and f Ds1(2460) = 117 − 410 MeV.…”

Molecular components in P -wave charmed-strange mesons

“…where V OGE and V CON have been introduced above and the V 1−loop OGE term is the one-loop correction to the OGE potential that contains central, tensor and spin-orbit contributions whose particular expressions implemented in our quark model can be found in Ref. [61].…”

The Ds1(2460) as a molecular state in a constituent quark model

“…We only find a resonance at M = 2504 − i83.6 MeV so it makes evident that this mechanism can not explain the low mass of the D s 0 (2317). Other possible mechanisms has been proposed by Lakhina [10] due to one loop contributions [11] that gives big mass shifts in this partial wave while the contribution in the 1 + sector is not so important [12].…”