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Structure-dependent radiative corrections to phi -> K^+K^-/K_LK_S decays
Current predictions for the ratio of phi -> K^+K^-/K_LK_S decay rates exceed
the corresponding experimental value in about five standard deviations. By far,
the dominant sources of isospin breaking to this ratio are the phase-space
(52%) and the electromagnetic radiative (4.3%, computed within scalar QED)
corrections. Here we estimate the effects of the electromagnetic structure of
kaons and other model-dependent contributions into the radiative corrections.Comment: 8 pages, Latex, 2 .eps figure
Beyond the soft photon approximation in radiative production and decay of charged vector mesons
We study the effects of model-dependent contributions and the electric
quadrupole moment of vector mesons in the decays and
. Their interference with the amplitude originating
from the radiation due to electric charges vanishes for photons emitted
collinearly to the charged particle in the final state. This brings further
support to our claim in previous works, that measurements of the photon energy
spectrum for nearly collinear photons in those decays are suitable for a first
measurement of the magnetic dipole moment of charged vector mesons.Comment: 13 pages, 2 eps figures, Latex. Accepted for publication in Journal
of Physics G: Nuclear and Particle Physics(2001
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