Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-07-23
Phys.Rev.Lett.93:202001,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 6 figures; v2: Significant improvements for threshold behavior, and for the hadronic widths by including additional
Scientific paper
10.1103/PhysRevLett.93.202001
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.
Beveren Eef van
Rupp George
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