  We evaluate the potential of a dedicated search for tth production in the
SSDL+2b channel. Such a measurement provides direct access to the top Yukawa
coupling, since the sensitivity is not convolved with the loop-level
h-gamma-gamma or poorly known hbb coupling, as is the case for present tth
searches. Furthermore, susceptibility to uncertainties in the Higgs width can
be reduced by considering a ratio of SSDL+2b rates with those of the performed
Wh -> WWW* measurement. The SSDL channel can therefore rely primarily on the
already well-measured h->WW* decay. This feasibility study required the
development of a new calculation method for "fake" leptons, which constitute
the dominant background to our search. Combining measurements from LHC7, LHC8
and in the future LHC14 for the Higgs coupling fit would help resolve any
remaining ambiguity between the top Yukawa coupling and a BSM contribution to
the hgg coupling.
