Revisiting superparticle spectra in superconformal flavor models

TL;DR

This paper investigates superparticle spectra in superconformal flavor models with non-universal gaugino masses, highlighting implications for neutralino LSP types, fine-tuning, and flavor-changing neutral current issues.

Contribution

It demonstrates how non-universal gaugino masses influence superparticle spectra and addresses the fine-tuning and FCNC problems within superconformal flavor models.

Findings

Non-universal gaugino masses can produce wino-like or higgsino-like neutralino LSPs.

The higgsino-like LSP region can improve the fine-tuning problem.

Degeneracy of scalar masses is not significantly affected by gaugino mass ratios.

Abstract

We study superparticle spectra in the superconformal flavor scenario with non-universal gaugino masses. The non-universality of gaugino masses can lead to the wino-like or higgsino-like neutralino LSP. Furthermore, it is shown that the parameter space for the higgsino-like LSP includes the region where the fine-tuning problem can be improved. The degeneracy of soft scalar masses squared does not drastically change by taking ratios of gaugino masses of order one. The degeneracy of scalar masses for squarks and left-handed sleptons would be good to avoid the FCNC problem but that of right-handed slepton masses is weak. However, the overall size of right-handed slepton masses become larger when the bino becomes heavier. It is also pointed out that such region can be realized, and thus, that would be favorable to avoid the FCNC problem for soft scalar masses as well as A-terms.