Decay Constants of $D_{sJ}^{\ast }$(2317) and $D_{sJ}$(2460)

Abstract

The resonances $D_{sJ}^{\ast }$(2317) and $D_{sJ}$(2460) which are considered to be the $(0^{+},1^{+})$ doublet composed of charm and strange quarks have been discovered recently. Using the method of Rosner which is based on the factorization hypothesis, we calculate the lower bounds of the decay constants of these states from the branching ratios of $B\to D{D}_{sJ}$ measured by Belle and Babar.Our result shows that the decay constant of $D_{sJ}$(2460) is about twice that of $D_{sJ}^{\ast }$(2317) on the contrary to the naive expectation of the heavy quark symmetry which gives their equality. We show that this big deviation originates from the large internal motion of quarks inside these $P$-wave states and that our result is in good accord with the relativistic quark model calculation.

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Cited by in corpus (13)

• The New Heavy Mesons: A Status Report
• Strong and radiative decays of the Ds0*(2317) meson in the DK-molecule picture
• Masses and decay constants of the $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ from $N_f=2$ lattice QCD close to the physical point
• Ds0*(2317) and Ds1(2460) mesons in two-body B-meson decays
• Decay constants of $P$-wave mesons
• From the Kappa via the Ds0*(2317) to the chi_c0: connecting light and heavy scalar mesons
• Production of P-wave Charmed Mesons in Hadronic B Decays
• Decay constants of P-wave heavy-light mesons from unquenched lattice QCD
• Spectra of heavy-light mesons in a relativistic model
• Nonleptonic $B\to D^{(\ast )}{D}_{sJ}^{(\ast )}$ decays and the nature of the orbitally excited charmed-strange mesons
• Study of light-cone distribution amplitudes for p-wave heavy mesons
• Mass and width of the Upsilon(4S)
• The $B^{+(0)}\to {\bar{D}}^{0(-)}{D}_{s0}^{\ast }(2317{)}^{+}$ decays and the molecular structure of $D_{s0}^{\ast }(2317)$