143 research outputs found
Detection of Charged MSSM Higgs Bosons at CERN LEP-II and NLC
We study the possibility of detecting the charged Higgs bosons predicted in
the Minimal Supersymmetric Standard Model , with the reactions
, using the
helicity formalism. We analyze the region of parameter space
where could be detected in the limit when
is large. The numerical computation is done for the energie which
is expected to be available at LEP-II ( GeV) and for a possible
Next Linear Collider ( GeV).Comment: Latex file and 5 figure
Majorana neutrino decay in an Effective Approach
The search strategy or the finding of new effects for heavy neutrinos often
relies on their different decay channels to detectable particles. In particular
in this work we study the decay of a Majorana neutrino with interactions
obtained from an effective general theory modeling new physics at the scale
. The results obtained are general because they are based in an
effective theory and not in specific models. We are interested in relatively
light heavy Majorana neutrinos, with masses lower than the mass
(). This mass range simplifies the study by reducing the possible
decay modes. Moreover, we found that for TV, the neutrino
plus photon channel could give explanation to different observations: we
analyze the potentiality of the studied interactions to explain some
neutrino-related problems like the MiniBooNE and SHALON anomalies. We show in
different figures the dominant branching ratios and the decay length of the
Majorana neutrino in this approach. This kind of heavy neutral leptons could be
searched for in the LHC with the use of displaced vertices techniques. \Comment: 15 page, 5 figure
Pairs-Production of Higgs in Association with Bottom Quarks Pairs at Colliders
In a previous paper, we studied the Higgs pair production in the standard
model with the reaction . Based on this, we study
the Higgs pair production via . We evaluate the
total cross section of and calculate the number total of events
considering the complete set of Feynman diagrams at tree-level, and compare
this process with the process . The numerical
computation is done for the energy which is expected to be available at a
possible Next Linear Collider with a center-of-mass energy and luminosity 1000 .Comment: 12 pages, 6 figure
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