129 research outputs found
Supersymmetric Higgs production at the Large Hadron Collider
We review the status of theoretical predictions for the production of neutral
Higgs bosons at the LHC. Special emphasis is put on the role of bottom quarks
in the gluon fusion process and in the associated production of Higgs bosons
with bb-bar pairs.Comment: LaTeX, 3 pages, 9 PostScript files included. Talk given at the
HEP2003 Europhysics Conference in Aachen, Germany (EPS 2003), July 17-23,
200
Higgs production in heavy quark annihilation through next-to-next-to-leading order QCD
The total inclusive cross section for charged and neutral Higgs production in
heavy-quark annihilation is presented through NNLO QCD. It is shown that, aside
from an overall factor, the partonic cross section is independent of the
initial-state quark flavors, and that any interference terms involving two
different Yukawa couplings vanish. A simple criterion for defining the central
renormalization and factorization scale is proposed. Its application to the
process yields results which are compatible with the values usually
adopted for this process. Remarkably, we find little variation in these values
for the other initial-state quark flavors. Finally, we disentangle the impact
of the different parton luminosities from genuine hard NNLO effects and find
that, for the central scales, a naive rescaling by the parton luminosities
approximates the full result remarkably well.Comment: 21 pages, 7 figures, 1 table. Matches published versio
Techniques for NNLO Higgs production in the Standard Model and the MSSM
New techniques developed in connection with the NNLO corrections to the Higgs
production rate at hadron colliders and some recent applications are reviewed.Comment: 4 pages, LaTeX, 4 ps-files included. Talk presented at the XXXVIIIth
Rencontres de Moriond, QCD and High Energy Hadronic Interactions, Les Arcs,
France, March 22-29, 200
Hadronic Higgs Production and Decay in Supersymmetry at Next-to-Leading Order
Supersymmetric QCD corrections to the gluonic production and decay rate of a
CP-even Higgs boson are evaluated at next-to-leading order. To this aim, we
derive an effective Lagrangian for the gluon-Higgs coupling. We show that a
consistent calculation requires the inclusion of gluino effects, in contrast to
what has been done previously. The supersymmetric corrections to the
gluon-Higgs coupling lead to a modification of the next-to-leading order
K-factor for the Higgs production rate at the LHC by less than five percent.Comment: 13 pages, LaTeX, 12 ps-files included. v2: Typos fixed, references
added, minor modifications. v3: Typos fixed
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