221 research outputs found
Testing Higgs Self-Couplings at High-Energy Linear Colliders
In order to verify the Higgs mechanism experimentally, the Higgs
self-couplings have to be probed. These couplings allow the reconstruction of
the characteristic Higgs potential responsible for the electroweak symmetry
breaking. The couplings are accessible in a variety of multiple Higgs
production processes. The theoretical analysis including the most relevant
channels for the production of neutral Higgs boson pairs at high-energy and
high-luminosity linear colliders will be presented in this note.Comment: Contributed to 5th International Linear Collider Workshop (LCWS
2000), Fermilab, Batavia, Illinois, 24-28 Oct 2000; 4 page
Higgs Boson Search at e+e- and Photon Linear Colliders
The various search modes for the Higgs bosons of the Standard Model (SM) and
its Minimal Supersymmetric Extension (MSSM) at the International Linear
Collider (ILC) will be summarized briefly. In particular, as a unique discovery
mode the production of heavy neutral MSSM Higgs bosons for medium values of
in photon collisions will be presented. Furthermore,
fusion into MSSM Higgs bosons in the photon mode will be shown to give access
to the mixing parameter with a precision of better than 10% for
large values of this parameter.Comment: Proceedings PLC2005, Kazimierz 200
Impact of Electroweak Corrections on Neutral Higgs Boson Decays in Extended Higgs Sectors
Precision predictions play an important role in the search for indirect New
Physics effects in the Higgs sector itself. For the electroweak (EW)
corrections of the Higgs bosons in extended Higgs sectors several
renormalization schemes have been worked out that provide
gauge-parameter-independent relations between the input parameters and the
computed observables. Our recently published program codes 2HDECAY and
ewN2HDECAY allow for the computation of the EW corrections to the Higgs decay
widths and branching ratios of the Two-Higgs-Doublet Model (2HDM) and the
Next-to-Minimal-2HDM (N2HDM) for different renormalization schemes of the
scalar mixing angles. In this paper, we present a comprehensive and complete
overview over the relative size of the EW corrections to the branching ratios
of the 2HDM and N2HDM neutral Higgs bosons for different applied
renormalization schemes. We quantify the size of the EW corrections of Standard
Model(SM)- and non-SM-like Higgs bosons and moreover also identify
renormalization schemes that are well-behaved and do not induce unnaturally
large corrections. We furthermore pin down decays and parameter regions that
feature large EW corrections and need further treatment in order to improve the
predictions. Our study sets the scene for future work in the computation of
higher-order corrections to the decays of non-minimal Higgs sectors
(SUSY) Higgs Search at the LHC
The discovery of the Standard Model (SM) or supersymmetric (SUSY) Higgs
bosons belongs to the main endeavors of the Large Hadron Collider (LHC). In
this article the status of the signal and background calculations for Higgs
boson production at the LHC is reviewed.Comment: 6 pages, 4 figures, plenary talk given at SUSY08, Seoul, Kore
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