Stripping a supermultiplet of all but one scalar: a microscopic view

TL;DR

This paper demonstrates how to isolate a single scalar from a supermultiplet using microscopic operators, with implications for supersymmetry breaking and gravitino dark matter scenarios.

Contribution

It introduces a method to project out all but one scalar component from a supermultiplet in microscopic theories, exemplified by the Fayet-Iliopoulos model.

Findings

Single scalar can be obtained via simple operators

Supersymmetry breaking is modeled using Fayet-Iliopoulos

Non-linear realization aids in gravitino dark matter scenarios

Abstract

We explain how a single scalar degree of freedom can be obtained from projecting out all the other components of a chiral superfield using simple operators in the microscopic theory. We use the Fayet-Iliopoulos model as an example of the origin for the necessary supersymmetry breaking. We also comment on one peculiar aspect where non-linear realisation can be useful: the freeze-in scenario for gravitino dark matter.