  The coupling of the Higgs to second generation particles can be studied by
measuring the decay of the Higgs boson to two muons. In this analysis we
considered the process at a centre of mass energy of 1 TeV, where the WW-fusion
process is dominant and the Higgsstrahlung can be neglected. We assumed an
integrated luminosity of 500 fb-1 and a beam polarization of (Pe- Pe+) =
(-0.8,+0.2). We estimated the sensitivity of the Higgs coupling to muons using
full simulation of the ILD detector described in the DBD. We developed a new
selection for the two muons based on the latest available particle ID tools.
This improved the sensitivity by more than 10%. A further 10% gains was
achieved by exploiting multi variate techniques. Combining the two improvements
we reached a sensitivity of 2.7, a significant improvement with respect to the
previous estimate.
