Multichannel calculation for Ds* vector states and the Ds(2632) resonance

Abstract

We study bound states below threshold and resonances above threshold in the D0-K+ and Ds-eta systems, using a many-coupled-channel model for non-exotic meson-meson scattering applied to states with the quantum numbers of c-sbar quark-antiquark vector mesons. We fit the ground state at 2.112 GeV, whence the lowest resonances in D0-K+ come out at 2.61, 2.72, 3.03, and 3.08 GeV. The resonance at 2.61 GeV acquires a width of about 8 MeV, while its partial P-wave cross section is up to six times larger in Ds-eta than in D0-K+, provided a mechanism accounting for Okubo-Zweig-Iizuka--forbidden decays is included. The latter finding is in agreement with the observations of the SELEX collaboration with respect to the recently reported DsJ(2632) resonance. Therefore, we conclude that the DsJ(2632) is most probably the first recurrence excitation of the Ds*(2112) meson.

arXiv comment11 pages, 6 figures; v2: Significant improvements for threshold behavior, and for the hadronic widths by including additional two-meson channels. Misprints in formulas corrected

References in corpus (14)

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• Observed D_s(2317) and tentative D(2100-2300) as the charmed cousins of the light scalar nonet
• Study of B- => D**0 pi-(D**0 => D(*)+ pi-) decays
• A Comprehensive Four-Quark Interpretation of D_s(2317), D_s(2457) and D_s(2632)
• First observation of a narrow charm-strange meson DsJ(2632) -> Ds eta and D0 K+
• Modified Breit-Wigner formula for mesonic resonances describing OZI decays of confined $q\bar{q}$ states and the light scalar mesons
• Is the anomalous decay ratio of D_{sJ}(2632) due to isospin breaking?
• $D_{sJ}^{+}(2632)$: An Excellent Candidate of Tetraquarks
• Recoupling matrix elements and decay
• A note on possible interpretations for the $D_{SJ}^{+}(2632)$ observed by SELEX
• Coupling constants and transition potentials for hadronic decay modes of a meson
• The light scalar mesons within quark models
• Is the D_sJ(2632) Meson a Cryptoexotic Tetraquark Baryonium State?
• Flavour symmetry of mesonic decay couplings

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