From Supercurrents to Soft Terms

TL;DR

This paper investigates how hidden sectors and quantum supergravity influence soft terms in gravity mediation, revealing non-universal gaugino mass unification and the absence of sum rules for sfermion masses.

Contribution

It provides a new parameterization of the Ferrara-Zumino multiplet correlator and calculates soft terms using the supercurrent approach, highlighting differences from general gauge mediation.

Findings

Gaugino masses are independent of sfermion masses.

Gaugino mass unification is non-universal.

No sum rules for sfermion masses per generation.

Abstract

In this paper,hidden sectors of Ferrara-Zumino multiplets with contributions to soft terms coming from quantum supergravity are investigated in framework of gravity mediation. The two-point correlator of Ferrara-Zumino multiplets can be parameterized, which implies the wave function renormalizations of components fields in gravity supermultiplet can be evaluated in relatively simple form. Soft terms are calculated via supercurrent approach. We find gaugino masses are independent of sfermion masses on general grounds. The unification of gaugino masses is not universal. In comparison with general gauge mediation, there are no sum rules for sfermion masses of each generation.