Internal supersymmetry and smallfield Goldstini
Abstract
The dynamics of the Goldstino mode of spontaneously broken supersymmetry is universal, being fully determined by the nonlinearly realized symmetry. We investigate the smallfield limit of this theory. This model nonlinearly realizes an alternative supersymmetry algebra with vanishing anticommutators between the fermionic generators, much like an internal supersymmetry. This Goldstino theory is akin to the Galilean scalar field theory that arises as the smallfield limit of DiracBornInfeld theory and nonlinearly realizes the Galilean symmetry. Indeed, the smallfield Goldstino is the partner of a complex Galilean scalar field under conventional supersymmetry. We close with the generalization to extended internal supersymmetry and a discussion of its higherdimensional origin.
 Publication:

Journal of High Energy Physics
 Pub Date:
 May 2018
 DOI:
 10.1007/JHEP05(2018)190
 arXiv:
 arXiv:1710.02480
 Bibcode:
 2018JHEP...05..190R
 Keywords:

 Extended Supersymmetry;
 SpaceTime Symmetries;
 Superspaces;
 Supersymmetry Breaking;
 High Energy Physics  Theory
 EPrint:
 12 pages, v2: references added, typos corrected, discussion about a fermionic invariant improved