Abstract
In light of the Higgs boson discovery we reconsider generation of the baryon asymmetry in the non-minimal split Supersymmetry model with an additional singlet superfield in the Higgs sector. We find that successful baryogenesis during the first order electroweak phase transition is possible within phenomenologically viable part of the model parameter space. We discuss several phenomenological consequences of this scenario, namely, predictions for the electric dipole moments of electron and neutron and collider signatures of light charginos and neutralinos.
Highlights
Not the first order phase transition, no sufficient departure from thermal equilibrium
We find that successful baryogenesis during the first order electroweak phase transition is possible within a phenomenologically viable part of the model parameter space
It is shown in ref. [25] that if the soft SUSY breaking parameter, Bμ, m2u and m2d are of order the squared splitting scale, MS2, two charged Higgses, one pseudoscalar and one neutral scalar Higgs bosons are heavy and decoupled from the low energy spectrum, while a fine-tuning is required for the mass of the lightest Higgs boson H and two singlets, S, P to be at the electroweak scale
Summary
We discuss the Lagrangian and particle content of the split NMSSM. Above the splitting scale MS, the model is described by generic NMSSM superpotential. [25] that if the soft SUSY breaking parameter, Bμ, m2u and m2d are of order the squared splitting scale, MS2, two charged Higgses, one pseudoscalar and one neutral scalar Higgs bosons are heavy and decoupled from the low energy spectrum, while a fine-tuning is required for the mass of the lightest Higgs boson H and two singlets, S, P to be at the electroweak scale. In order to reduce the number of trilinear couplings we assume that Higgs-scalar (H − S) and Higgspseudoscalar (H − P ) mixing terms in their squared mass matrix are equal to zero at the EW energy scale. This implies appropriate relations for the trilinear couplings A1 and A2, A1.
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