7,163 research outputs found
Effective Multi-Higgs Couplings to Gluons
Standard-Model Higgs bosons are dominantly produced via the gluon-fusion
mechanism at the LHC, i.e. in a loop-mediated process with top loops
providing the dominant contribution. For the measured Higgs boson mass of GeV the limit of heavy top quarks provides a reliable approximation as
long as the relative QCD corrections are scaled with the full mass-dependent LO
cross section. In this limit the Higgs coupling to gluons can be described by
an effective Lagrangian. The same approach can also be applied to the coupling
of more than one Higgs boson to gluons. We will derive the effective Lagrangian
for multi-Higgs couplings to gluons up to NLO thus extending previous
results for more than one Higgs boson. Moreover we discuss gluonic Higgs
couplings up to NNLO, if several heavy quarks contribute.Comment: 13 pages, 1 figur
QCD CORRECTIONS TO HIGGS BOSON DECAYS
The two--loop corrections to the
decay rate of the Standard Model Higgs boson as well as its production via
will be presented. These QCD corrections are obtained by using
a low-energy theorem for light Higgs bosons compared to the top quark mass. The
results yield strong screening effects of the
contributions. After that the two-loop QCD corrections to the
and gluonic decays of the Higgs bosons of the Standard Model and its minimal
supersymmetric extension are discussed. While the corrections to the
decays remain small of they are huge
50 -- 70 \% in the case of the gluonic decays.Comment: 16 pages, latex, 9 figures appended as uuencoded fil
Higgs Boson Production and Decay at the Tevatron
The theoretical status of Higgs boson production and decay at the Tevatron
within the Standard Model and its minimal supersymmetric extension is reviewed.
The focus will be on the evaluation of higher-order corrections to the
production cross sections and their phenomenological implications.Comment: 12 pages, latex, 6 figure
Higgs Production and Decay at Future Machines
Higgs boson production at future colliders within the Standard Model and its
minimal supersymmetric extension is reviewed. The predictions for decay rates
and production cross sections are presented including all relevant higher-order
corrections.Comment: 5 pages, latex, 5 figures, Contribution to the proceedings of the
International Europhysics Conference on High-Energy Physics, 19--26 August
1997, Jersusalem, Israe
Gluon fusion production of the Higgs boson in a Calculable Model with one Extra Dimension
In an extension of the Standard Model with one extra dimension and N=1
supersymmetry compactified on R^1/(Z_2 x Z'_2), we compute the Higgs boson
decay width into two gluons, relevant to Higgs production in hadronic
collisions. At one loop, the decay width is significantly suppressed with
respect to the SM. For a compactification radius 1/R = 370 \pm 70 GeV and a
Higgs mass m_H = 127 \pm 8 GeV, as expected in the case of a radiatively
generated Fayet-Iliopoulos term, we find it to be less than 15% of the SM
result.Comment: 9 pages, 3 eps figures, comments and references added, to appear on
Phys.Lett.
SUSY-QCD Corrections to Higgs Boson Production at Hadron Colliders
We analyze the next-to-leading order SUSY-QCD corrections to the production
of Higgs particles at hadron colliders in supersymmetric extensions of the
Standard Model. Besides the standard QCD corrections due to gluon exchange and
emission, genuine supersymmetric corrections due to the virtual exchange of
squarks and gluinos are present. At both the Tevatron and the LHC, these
corrections are found to be small in the Higgs-strahlung, Drell-Yan-like Higgs
pair production and vector boson fusion processes.Comment: 11 pages, latex, 3 figures, numerical analysis extended, one figure
and one reference adde
Digital Measurement of Differential Time Delay of Pseudo Random Coded Signals Scientific Report No. 6
Digital measurement of differential time delay of pseudorandom coded signal
On the time required for group multiplication
Group multiplication of logical elements by networks having limited inputs and unit delay in computing output functio
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