  The Higgs boson branching ratio into vector bosons is sensitive to the decay
widths of those vector bosons because they are produced with at least one boson
significantly off-shell. Gamma(H to V V ) is approximately proportional to the
product of the Higgs boson coupling and the vector boson width. Gamma Z is well
known, but Gamma W gives an uncertainty on Gamma(H to W W ) which is not
negligible. The ratio of branching ratios, BR(H to W W )/BR(H to ZZ) measured
by a combination of ATLAS and CMS at LHC is used herein to extract a width for
the W boson of Gamma W = 1.8+0.4-0.3 GeV by assuming Standard Model couplings
of the Higgs bosons. This dependence of the branching ratio on Gamma W is not
discussed in most Higgs boson coupling analyses.
