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High precision determination of the gluon fusion Higgs boson cross-section at the LHC
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High precision determination of the gluon fusion Higgs boson cross-section at the LHC
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High precision determination of the gluon fusion Higgs boson cross-section at the LHC
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Journal Article
High precision determination of the gluon fusion Higgs boson cross-section at the LHC
2016
Overview
A
bstract
We present the most precise value for the Higgs boson cross-section in the gluon-fusion production mode at the LHC. Our result is based on a perturbative expansion through N
3
LO in QCD, in an effective theory where the top-quark is assumed to be infinitely heavy, while all other Standard Model quarks are massless. We combine this result with QCD corrections to the cross-section where all finite quark-mass effects are included exactly through NLO. In addition, electroweak corrections and the first corrections in the inverse mass of the top-quark are incorporated at three loops. We also investigate the effects of threshold resummation, both in the traditional QCD framework and following a SCET approach, which resums a class of π
2
contributions to all orders. We assess the uncertainty of the cross-section from missing higher-order corrections due to both perturbative QCD effects beyond N
3
LO and unknown mixed QCD-electroweak effects. In addition, we determine the sensitivity of the cross-section to the choice of parton distribution function (PDF) sets and to the parametric uncertainty in the strong coupling constant and quark masses. For a Higgs mass of
m
H
= 125 GeV and an LHC center-of-mass energy of 13 TeV, our best prediction for the gluon fusion cross-section is
σ
=
48.58
p
b
−
3.27
p
b
+
2.22
p
b
theory
±
1.56
p
b
3.20
%
P
D
F
+
α
s
.
Publisher
Springer Berlin Heidelberg
