1,291 research outputs found
Natural Split Mechanism for Sfermions: =2 Supersymmetry in Phenomenology
We suggest a natural split mechanism for sfermions based on =2
supersymmetry (SUSY). =2 SUSY protects a sfermion in an =2 multiplet from
gaining weight by SUSY breaking. Therefore, if partly =2 SUSY is effectively
obtained, a split spectrum can be realized naturally. As an example of the
natural split mechanism, we build a gauge-mediated SUSY breaking-like model
assuming =2 SUSY is partly broken in a UV theory. The model explains the
Higgs boson mass and the muon anomalous magnetic dipole moment within
level with a splitting sfermion spectrum. The model has seven light
sparticles described by three free parameters and predicts a new chiral
multiplet, sb: the =2 partner of the vector multiplet. The
bini, the fermion component of the sb, weighs MeVs. We mention the experimental
and the cosmological aspects of the model.Comment: 17 pages and 3 figures, Version accepted for publication in PL
Supersymmetric Heavy Higgses at e^+e^- Linear Collider and Dark-Matter Physics
We consider the capability of the e^+e^- linear collider (which is recently
called as the International Linear Collider, or ILC) for studying the
properties of the heavy Higgs bosons in the supersymmetric standard model. We
pay special attention to the large \tan\beta region which is motivated, in
particular, by explaining the dark-matter density of the universe (i.e.,
so-called ``rapid-annihilation funnels''). We perform a systematic analysis to
estimate expected uncertainties in the masses and widths of the heavy Higgs
bosons assuming an energy and integrated luminosity of \sqrt{s}=1 TeV and L=1
ab^{-1}. We also discuss its implication to the reconstruction of the
dark-matter density of the universe.Comment: 28 pages, 13 figures, version to appear in PR
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