10,809 research outputs found
New Physics and novel Higgs signals
We review some of the results of our recent work dealing with the novel type
of Higgs signals that arise when one considers extensions of the standard
model.
We discuss first possible deviations on the Higgs couplings due to heavy
particles, in the context of the MSSM and with large extra-dimensions. Then, we
present several models where it is possible to induce flavor violating Higgs
couplings, and probe them at future hadron colliders through the LFV Higgs
decay h-> tau mu or with rare top decays.Comment: Talk given at the X Mexican School of Particles and Fields, Playa del
Carmen, Mexico, 200
FCNC and non-standard soft-breaking terms in weak-scale Supersymmetry
We study the inclusion of non-standard soft-breaking terms in the minimal
SUSY extension of the SM, considering it as a model of weak-scale SUSY. These
terms modify the sfermion mass matrices, which can induce new sources of
flavour violation. Bounds on the new soft parameters can be estimated from
current data. The results are then applied to evaluate FCNC top decay t -> c +
hi (hi= h,H,A). Implications of complex soft parameters for CP violation are
also addressed.Comment: Revised version (8 pages), title changed and references corrected.
Presented at VIII Mexican Workshop on Particles and Fields, Merida (1999
Gauge-Higgs unification with brane kinetic terms
By identifying the Higgs field as an internal component of a higher
dimensional gauge field it is possible to solve the little hierarchy problem.
The construction of a realistic model that incorporates such a gauge-Higgs
unification is an important problem that demands attention. In fact, several
attempts in this direction have already been put forward. In this letter we
single out one such attempt, a 6D SU(3) extended electroweak theory, where it
is possible to obtain a Higgs mass prediction in accord with global fits. One
shortcoming of the model is its prediction for the Weinberg angle, it is too
large. We slightly modify the model by including brane kinetic terms in a way
motivated by the orbifold action on the 6D fields. We show that in this way it
is possible to obtain the correct Weinberg angle while keeping the desired
results in the Higgs sector.Comment: 11 pages, 2 figures. References added. Version to appear in Phys.
Lett.
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