Abstract:
The Compact Linear Collider (CLIC) is an option
for a future e+e− collider operating at centre-of-mass energies
up to 3 TeV, providing sensitivity to a wide range of
new physics phenomena and precision physics measurements
at the energy frontier. This paper is the first comprehensive
presentation of the Higgs physics reach of CLIC
operating at three energy stages: √s = 350 GeV, 1.4 and
3 TeV. The initial stage of operation allows the study of
Higgs boson production in Higgsstrahlung (e+e− → ZH)
and WW-fusion (e+e− → Hνe ¯νe), resulting in precise measurements
of the production cross sections, the Higgs total
decay width ΓH, and model-independent determinations of
the Higgs couplings. Operation at √s > 1 TeV provides
high-statistics samples of Higgs bosons produced through
WW-fusion, enabling tight constraints on the Higgs boson
couplings. Studies of the rarer processes e+e− → t¯tH and
e+e− → HHνe ¯νe allow measurements of the top Yukawa
coupling and the Higgs boson self-coupling. This paper
presents detailed studies of the precision achievable with
Higgs measurements at CLIC and describes the interpretation
of these measurements in a global fit.
