Chiral perturbation theory vs. vector meson dominance in the decays $φ\to ργγ$ and $φ\to ωγγ$

Details Chiral perturbation theory vs. vector meson dominance in the decays $φ\to ργγ$ and $φ\to ωγγ$ Chiral perturbation theory vs. vector meson dominance in the decays $φ\to ργγ$ and $φ\to ωγγ$

1995-10-02

arxiv.org/abs/hep-ph/9510205v1

Phys.Lett. B366 (1996) 287-292

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 Encapsuled-Postscript figures, uses epsfig.sty

Scientific paper

10.1016/0370-2693(95)01371-7

It is pointed out that the radiative decays of a $\phi$ meson, $\phirho$ and $\phiom$, receive dominant contributions from the pseudoscalar ($P = \eta, \eta^{'}$) exchanges. Using the vector meson dominance model, we find that $B (\phirho) \approx 1.3 \times 10^{-4}$ and $B (\phiom) \approx 1.5 \times 10^{-5}$, which are mainly from the $\eta^{'}$ pole. Thus, these decays are well within the reach of the $\phi$ factory. Our estimates are a few orders of magnitude larger than the chiral loop contributions in the heavy vector meson chiral lagrangian, which is about ( a few ) $\times 10^{-9}$.

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