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Article overview
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Precision calculations for h->WW/ZZ->4 fermions in the Two-Higgs-Doublet Model with PROPHECY4F | | Lukas Altenkamp
; Stefan Dittmaier
; Heidi Rzehak
; | | Date: |
20 Oct 2017 | | Abstract: | We have calculated the next-to-leading-order electroweak and QCD corrections
to the decay processes h -> WW/ZZ -> 4 fermions of the light CP-even Higgs
boson h of various types of Two-Higgs-Doublet Models (Types I and II,
"lepton-specific" and "flipped" models). The input parameters are defined in
four different renormalization schemes, where parameters that are not directly
accessible by experiments are defined in the MSbar scheme. Numerical results
are presented for the corrections to partial decay widths for various benchmark
scenarios previously motivated in the literature, where we investigate the
dependence on the MSbar renormalization scale and on the choice of the
renormalization scheme in detail. We find that it is crucial to be precise with
these issues in parameter analyses, since parameter conversions between
different schemes can involve sizeable or large corrections, especially in
scenarios that are close to experimental exclusion limits or theoretical
bounds. It even turns out that some renormalization schemes are not applicable
in specific regions of parameter space. Our investigation of differential
distributions shows that corrections beyond the Standard Model are mostly
constant offsets induced by the mixing between the light and heavy CP-even
Higgs bosons, so that differential analyses of h -> 4f decay observables do not
help to identify Two-Higgs-Doublet Models. Moreover, the decay widths do not
significantly depend on the specific type of those models. The calculations are
implemented in the public Monte Carlo generator PROPHECY4F and ready for
application. | | Source: | arXiv, 1710.7598 | | Services: | Forum | Review | PDF | Favorites | |
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