A
bstract
A search for Higgs boson (H) production at high transverse momentum (
p
T
) in the WW decay channel is presented. The analysis uses proton-proton collisions at
$$ \sqrt{s}=13 $$
s
=
13
TeV recorded by the CMS experiment in 2016–2018, corresponding to an integrated luminosity of 138 fb
−
1
. The visible decay products of the Higgs boson are reconstructed as a single large-radius jet with one isolated lepton or none (1
ℓ
and 0
ℓ
, respectively;
ℓ
= e,
μ
). The H-candidate jets are identified using an advanced transformer-based algorithm and are calibrated with the Lund jet plane reweighting technique. The 1
ℓ
channel is further split into gluon fusion, vector boson fusion, and associated production with hadronically decaying vector boson categories, while the 0
ℓ
channel considers all production processes inclusively. The measured cross section times the H
→
WW branching fraction relative to the standard model expectation is
$$ \mu =-{0.19}_{-0.46}^{+0.48} $$
μ
=
−
0.19
−
0.46
+
0.48
, indicating no evidence of a signal above the background. This measurement represents the first dedicated study of highly Lorentz-boosted H
→
WW decays, complementing earlier searches for high-
p
T
Higgs boson in other decay channels.
