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Lopsided Gauge Mediation | | Andrea De Simone
; Roberto Franceschini
; Gian Francesco Giudice
; Duccio Pappadopulo
; Riccardo Rattazzi
; | | Date: |
30 Mar 2011 | | Abstract: | It has been recently pointed out that the unavoidable tuning among
supersymmetric parameters required to raise the Higgs boson mass beyond its
experimental limit opens up new avenues for dealing with the so called
$mu$-$B_mu$ problem of gauge mediation. In fact, it allows for accommodating,
with no further parameter tuning, large values of $B_mu$ and of the other
Higgs-sector soft masses, as predicted in models where both $mu$ and $B_mu$
are generated at one-loop order. This class of models, called Lopsided Gauge
Mediation, offers an interesting alternative to conventional gauge mediation
and is characterized by a strikingly different phenomenology, with light
higgsinos, very large Higgs pseudoscalar mass, and moderately light sleptons.
We discuss general parametric relations involving the fine-tuning of the model
and various observables such as the chargino mass and the value of $ aneta$.
We build an explicit model and we study the constraints coming from LEP and
Tevatron. We show that in spite of new interactions between the Higgs and the
messenger superfields, the theory can remain perturbative up to very large
scales, thus retaining gauge coupling unification. | | Source: | arXiv, 1103.6033 | | Services: | Forum | Review | PDF | Favorites | |
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