  We present a theory for the recombination of (charged) holons and doublons in
one-dimensional organic Mott insulators, which is responsible for the decay of
a photoexcited metallic state. Due to the charge-spin separation, the dominant
mechanism for recombination at low density of charges involves a multi-phonon
emission. We show that a reasonable coupling to phonons is sufficient to
explain the fast recombination observed by pump-probe experiments in
ET-F$_2$TCNQ, whereby we can also account for the measured pressure dependence
of the recombination rate.
