  A model with a mirror symmetry whose particles content consist of the
ordinary SM particles (plus the right handed neutrinos) and their parity mirror
partners, can provide a multicomponent dark matter consist of cold and warm
dark matter components. I add to the original mirror model a singlet scalar and
its mirror partner, whose quantum numbers are the same as the singlet right
handed electron (and its mirror-partner). The new scalar can have a zero VEV,
while its mirror partner VEV is non zero. As consequences mirror photon will
obtain mass whose order is around the neutral mirror weak boson mass, rendering
the mirror electromagnetic-like interaction similar like a mirror weak
interaction. There is a mixing among the ordinary neutrinos, mirror neutrinos,
the singlet and the doublet mirror electrons. As a result the mirror doublet
electrons can have masses in the keV order, becoming the warm dark matter
component of this model. The cold dark matter component comes from the mirror
nucleons that can have mass larger than the ordinary nucleons. The Big Bang
Nucleosynthesys constraint can be avoided by a large entropy production in the
ordinary sector due to a slow decay of mirror singlet electrons. The
temperature ratio of the two sectors is approximately proportional to the ratio
of the VEV's of the ordinary and mirror Higgs, and this also will determine the
cold-warm dark matter contribution to the cosmic energy density.
