Light Gauginos and Conformal Sequestering

TL;DR

This paper investigates how strong conformal dynamics in the hidden sector can generate comparable gaugino and sfermion masses in gauge mediation models, addressing the light gaugino problem.

Contribution

It proposes a mechanism leveraging conformal sequestering to naturally produce gaugino masses comparable to sfermion masses, solving a key hierarchy issue.

Findings

Next-to-leading order gaugino masses can match sfermion masses under certain conditions.

Conformal dynamics can suppress gaugino mass vanishing at leading order.

Discussion of the 0/B_0 problem in the context of this mechanism.

Abstract

In a wide class of direct and semi-direct gauge mediation models, it has been observed that the gaugino masses vanish at leading order. It implies that there is a hierarchy between the gaugino and sfermion masses, invoking a fine-tuning problem in the Higgs sector via radiative corrections. In this paper, we explore the possibility of solving this anomalously light gaugino problem exploiting strong conformal dynamics in the hidden sector. With a mild assumption on the anomalous dimensions of the hidden sector operators, we show that the next to leading order contributions to the gaugino masses can naturally be in the same order as the sfermion masses. \mu/B_\mu problem is also discussed.