Scalar meson properties from D-meson decays

Details Scalar meson properties from D-meson decays Scalar meson properties from D-meson decays

2006-10-18

arxiv.org/abs/hep-ph/0610229v1

Nucl.Phys.A790:510-513,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at the Few Body 18 conference in Santos, Brazil. 4 pages, to be published in Nuclear Physics A

Scientific paper

10.1016/j.nuclphysa.2007.03.086

Decay amplitudes of D(D_s)->f0(980)X, X=pi, K, are compared to experimental branching ratios with the aim of singling out the poorly known D->f0(980) transition form factor in these amplitudes. Since the other elements of the amplitudes are either calculable in an effective QCD theory using operator product expansion or are known from experiment (e.g. the pion and kaon decay constants), we can take advantage of these reactions to constrain the transition form factors obtained in relativistic quark models. In these models, the f0(980) wavefunction requires an unknown size parameter for both its non-strange ubar u(dbar d) and strange sbar s components, which we fit to the D(D_s) decay data.

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