716 research outputs found
Signals from Flavor Changing Interactions in Extended Models
In the contest of a Two Higgs Doublet Model without flavor conservation, the
presence of Flavor Changing Neutral Scalar Currents may affect in particular
the couplings of the top quark. Some ideas on how to look for new signals from
Flavor Changing Interactions at the next generation of lepton colliders are
presented.Comment: 2 pages, latex file, gzip-compressed and uuencoded; invited talk at
the European Physical Society Conference on High Energy Physics, Brussels,
July 1995; to be published in the proceeding
Flavor Changing Neutral Currents and the third family
We investigate the possibility of having sizable effects from flavor changing
neutral currents at the tree level in a particular class of Two Higgs Doublet
Models. Constraints from existing experimental information are discussed. Some
interesting signals at the future generation of lepton colliders are
illustrated.Comment: 6 pages, 1 Postscript figures, uses epsf.sty, to appear in the
Proceedings of the XXXIst Rencontres de Moriond Les Arcs, France, March 199
Associated Top-Higgs production at future colliders
We discuss the relevance of the associated production of a Higgs boson with a
pair of top-antitop quarks at both the LHC and a future high energy e^+e^-
collider.Comment: 4 pages, 4 figures. Talk given at DPF 2000: The Meeting of the
Division of Particles and Fields of the American Physical Society, Columbus,
Ohio, 9-12 Aug 200
Signals from Flavor Changing Scalar Currents at the Future Colliders
We present a general phenomenological analysis of a class of Two Higgs
Doublet Models with Flavor Changing Neutral Currents arising at the tree level.
The existing constraints mainly affect the couplings of the first two
generations of quarks, leaving the possibility for non negligible Flavor
Changing couplings of the top quark open. The next generation of lepton and
hadron colliders will offer the right environment to study the physics of the
top quark and to unravel the presence of new physics beyond the Standar Model.
In this context we discuss some interesting signals from Flavor Changing Scalar
Neutral Currents.Comment: 5 pages, 2 EPS figures, requires Latex2e, snow2e.cls (included) and
graphics.st
Flavor Changing Neutral Currents at mu^+mu^- Colliders
We illustrate the possibility of observing signals from Flavor Changing
Neutral Currents, originating from the scalar sector of a Two Higgs Doublet
Model. In particular, we focus on the tree level process mu^+ mu^- --> tbar c +
cbar t, via scalar exchange in the s-channel, as a distinctive process for mu^+
mu^- colliders.Comment: 10 pages, 1 EPS figure, requires LaTeX, epsf.st
Higgs boson production in association with top quarks in the POWHEG BOX
We present results from the analytic calculation of top+antitop+Higgs
hadronic production at Next-to-Leading Order in QCD interfaced with
parton-shower Monte Carlo event generators in the POWHEG BOX framework. We
consider kinematic distributions of the top quark and Higgs boson at the 8 TeV
Large Hadron Collider and study the theoretical uncertainties due to specific
choices of renormalization/factorization scales and parton-showering
algorithms, namely PYTHIA and HERWIG. The importance of spin-correlations in
the production and decay stages of a top/antitop quark is discussed on the
example of kinematic distributions of leptons originating from the top/antitop
decays. The corresponding code is now part of the public release of the POWHEG
BOX.Comment: 15 pp, 14 figure
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