  We investigate the differential ionization probability of chiral molecules in
the strong field regime as a function of the helicity of the incident light. To
this end, we analyze the fourfold ionization of bromochlorofluoromethane
(CHBrClF) with subsequent fragmentation into four charged fragments and
different dissociation channels of the singly ionized methyloxirane. We observe
a variation of the differential ionization probability in a range of several
percent. Accordingly, we conclude that the helicity of light is a quantity that
should be considered for the theoretical description of the strong field
ionization rate of chiral molecules.
