2,647 research outputs found
Majorana Dark Matter in Minimal Higgs Portal Models after LUX
We consider the Singlet Majorana fermion dark matter model, in which the
standard model particles interact with the dark sector through the mixing of a
singlet scalar and the Higgs boson. In this model both the dark matter and the
singlet scalar carry lepton number, the latter being a bilepton. We suppose the
existence of a symmetry, remnant of some high energy local symmetry
breaking, that stabilizes the Majorana fermion. We analyzed the parameter space
of this model and found that the lepton number symmetry breaking scale, drove
by the singlet scalar, is constrained to be within hundreds to thousands of
GeV, so as to conform with the observed dark matter relic density. Finally, we
address the direct detection and invisible Higgs decay complementarity,
confronting our model with recent LUX and LHC constraints, as well as XENON1T
prospects.Comment: 20 pages, 12 figure
Remarks on supersymmetry of quantum systems with position-dependent effective masses
We apply the supersymmetry approach to one-dimensional quantum systems with
spatially-dependent mass, by including their ordering ambiguities dependence.
In this way we extend the results recently reported in the literature.
Furthermore, we point out a connection between these systems and others with
constant masses. This is done through convenient transformations in the
coordinates and wavefunctions.Comment: 8 pages, 1 figur
Controle integrado de assa-peixe (Vernonia scabra Pers) em pastagens cultivadas de Paragominas, ParĆ”.
Desempenho de plantas forrageiras em consorciaĆ§Ć£o em Ć”reas de savana bem drenada no Estado do AmapĆ”.
Resumo tambĆ©m publicado em: REUNIĆO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 37., 2000, ViƧosa, MG. Resumos dos trabalhos apresentados. ViƧosa, MG: Sociedade Brasileira de Zootecnia, 2000. p. 69
Desempenho de bovinos em pastagens nativas de savana e de Brachiaria humidĆcola em diferentes cargas animais.
Resumo tambĆ©m publicado em: REUNIĆO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 37., 2000, ViƧosa, MG. Resumos dos trabalhos apresentados. ViƧosa, MG: Sociedade Brasileira de Zootecnia, 2000. p. 68
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