Strange Mesonic Transition Form Factor in the Chiral Constituent Quark Model

Details Strange Mesonic Transition Form Factor in the Chiral Constituent Quark Model Strange Mesonic Transition Form Factor in the Chiral Constituent Quark Model

1997-09-25

arxiv.org/abs/nucl-th/9709053v2

Phys.Rev.C58:2595-2598,1998

Physics

Nuclear Physics

Nuclear Theory

LaTex 11 pages, 2 PostScript figures

Scientific paper

10.1103/PhysRevC.58.2595

The form factor $g_{\rho \pi}^{(S)}(Q^{2})$ of the strange vector current transition matrix element $<\rho| \bar{s}\gamma_\mus|\pi>$ is calculated within the chiral quark model. A strange vector current of the constituent $U$- and D-quarks is induced by kaon radiative corrections and this mechanism yields the nonvanishing values of $g_{\rho\pi}^{(S)}(0)$. The numerical result at the photon point is consistent with the one given by the $\phi $-meson dominance model, but the fall-off in the $Q^{2}$-dependence is faster than the monopole form factor. Mesonic radiative corrections are also examined for the electromagnetic $\rho $-to-$\pi $ and $K^{*}$-to-$K$ transition amplitudes.

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