The Scalar Contribution to $τ\to K πν_τ$

Details The Scalar Contribution to $τ\to K πν_τ$ The Scalar Contribution to $τ\to K πν_τ$

1996-01-16

arxiv.org/abs/hep-ph/9601275v1

Z.Phys. C72 (1996) 619-626

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, Latex, uses epsfig.sty, 4 figures The complete paper, including figures, is also available via anonymous ftp at ft

Scientific paper

10.1007/BF02909193

We consider the scalar form factor in $\tau \to K\pi \nu_\tau$ decays. It receives contributions both from the scalar resonance $K_0^*(1430)$ and from the scalar projection of off-shell vector resonances. We construct a model for the hadronic current which includes the vector resonances $K^*(892)$ and $K^*(1410)$ and the scalar resonance $K_0^*(1430)$. The parameters of the model are fixed by matching to the $O(p^4)$ predictions of chiral perturbation theory. Suitable angular correlations of the $K\pi$ system allow for a model independent separation of the vector and scalar form factor. Numerical results for the relevant structure functions are presented.

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