Phenomenology of SUSY with scalar sequestering

TL;DR

Scalar sequestering in SUSY models predicts vanishing scalar masses at high scale, leading to distinctive superpartner spectra with heavy Higgsinos and enhanced third-generation scalar masses, driven by conformal dynamics.

Contribution

This paper reviews the scalar sequestering mechanism and proves its effects on Higgs soft masses and the superpartner spectrum, independent of SUSY breaking mediation.

Findings

Higgsinos are much heavier than scalar Higgses.

Third generation scalar masses are enhanced.

Scalar masses vanish at high scale due to conformal dynamics.

Abstract

The defining feature of scalar sequestering is that the MSSM squark and slepton masses as well as all entries of the scalar Higgs mass matrix vanish at some high scale. This ultraviolet boundary condition - scalar masses vanish while gaugino and Higgsino masses are unsuppressed - is independent of the supersymmetry breaking mediation mechanism. It is the result of renormalization group scaling from approximately conformal strong dynamics in the hidden sector. We review the mechanism of scalar sequestering and prove that the same dynamics which suppresses scalar soft masses and the B_mu term also drives the Higgs soft masses to -|mu|^2. Thus the supersymmetric contribution to the Higgs mass matrix from the mu-term is exactly canceled by the soft masses. Scalar sequestering has two tell-tale predictions for the superpartner spectrum in addition to the usual gaugino mediation predictions: Higgsinos are much heavier (mu > TeV) than scalar Higgses (m_A ~ few hundred GeV), and third generation scalar masses are enhanced because of new positive contributions from Higgs loops.