2 research outputs found
A More Flavored Higgs boson in Supersymmetric models
A More flavored Higgs boson arises when the flavor structure encoded in SUSY
extensions of the SM is transmited to the Higgs sector. The flavor-Higgs
transmition mechanism can have a radiative or mixing origin, as it is
illustrated with several examples, and can produce interesting Higgs signatures
that can be probed at future high-energy colliders. Within the MSSM, the flavor
mediation mechanism can be of radiative type, as it is realized trhough
gaugino-slepton loops, which transmit the flavor structture of the
soft-breaking sector to the Higgs bosons. In particular we focus on evaluating
the contributions from the general trilinear terms to the lepton flavor
violating Higgs (LFV) vertices. On the other hand, as an example of flavor
mediation through mixing, we discuss an E_6 inspired multi-Higgs model, with an
abelian flavor symmetry, where LFV as well as lepton flavor conserving Higgs
effects are found to arise, though in this case at tree-level. We find that
Tevatron and LHC can provide information on the flavor structure of these
models through the detection of the LFV higgs mode h-> tau+mu, while NLC can
perform high-precision measurements of the LFC mode h-> tau tau.Comment: 17 pages, 5 tables, 3 figures; corrected mistake in last section,
results changed but conclusions remmai
Electroweak Two-loop Corrections to the Effective Weak Mixing Angle.
Recently exact results for the complete electroweak two-loop contributions to
the effective weak mixing angle were published. This paper illustrates the
techniques used for this computation, in particular the methods for evaluating
the loop diagrams and the proper definition of Z-pole observables at
next-to-next-to-leading order. Numerical results are presented in terms of
simple parametrization formulae and compared in detail with a previous result
of an expansion up to next-to-leading order in the top-quark mass. Finally, an
estimate of the remaining theoretical uncertainties from unknown higher-order
corrections is given.Comment: 28 pages; added numerical formulae for form factors Delta-r and
Delta-kappa, and few minor corrections, version to appear in JHE