%0 Journal Article
%T Anomalous Higgs-boson coupling effects in HWW production at the LHC
%A Emidio Gabrielli
%A Matti Heikinheimo
%A Luca Marzola
%A Barbara Mele
%A Christian Spethmann
%A Hardi Veermae
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevD.89.053012
%X We study the LHC associated production of a Higgs boson and a W^+W^- vector-boson pair at 14 TeV, in the Standard Model and beyond. We consider different signatures corresponding to the cleanest H and W decay channels, and discuss the potential of the high-luminosity phase of the LHC. In particular, we investigate the sensitivity of the HWW production to possible anomalous Higgs couplings to vector bosons and fermions. Since the b-quark initiated partonic channel contributes significantly to this process, we find a moderate sensitivity to both the size and sign of an anomalous top-quark Yukawa coupling, because perturbative unitarity in the standard model implies a destructive interference in the b b-bar subprocess. We show that a combination of various signatures can reach a ~9 standard-deviation sensitivity in the presently allowed negative region of the top-Higgs coupling, if not previously excluded.
%U http://arxiv.org/abs/1312.4956v2