Calculable Sparticle Masses with Radiatively Driven Inverted Mass Hierarchy

TL;DR

This paper explores how SO(10) D-term contributions can enable radiative electroweak symmetry breaking in supersymmetric models with an inverted mass hierarchy, improving naturalness and flavor violation issues.

Contribution

It demonstrates that incorporating SO(10) D-term contributions allows for successful REWSB in IMH models, which was previously problematic.

Findings

D-term contributions facilitate REWSB in IMH models

Higgs scalar mass splittings improve the IMH

Models satisfy flavor and CP violation constraints

Abstract

Supersymmetric models with an inverted mass hierarchy (IMH: multi-TeV first and second generation matter scalars, and sub-TeV third generation scalars) can ameliorate problems arising from flavor changing neutral currents, $CP$ violating phases and electric dipole moments, while at the same time satisfying conditions on naturalness. It has recently been shown that such an IMH can be generated radiatively, making use of infra-red fixed point properties of renormalization group equations given Yukawa coupling unification and suitable $GUT$ scale boundary conditions on soft SUSY breaking masses. In these models, explicit spectra cannot be obtained due to problems implementing radiative electroweak symmetry breaking (REWSB). We show that use of SO(10) $D$-term contributions to scalar masses can allow REWSB to occur, while maintaining much of the desired IMH. A somewhat improved IMH is obtained if splittings are applied only to Higgs scalar masses.