Goldstini
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Thaler1.pdf
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Author(s)
Cheung, Clifford
Nomura, Yasunori
Thaler, Jesse
Date Issued
March 2010
Journal
Journal of High Energy Physics
Publisher
Springer Berlin / Heidelberg
Citation
Cheung, Clifford, Yasunori Nomura, and Jesse Thaler. “Goldstini.” Journal of High Energy Physics 2010.3 (2010) : 1-27-27.
Version
Author's final manuscript
Abstract
Supersymmetric phenomenology has been largely bound to the hypothesis that supersymmetry
breaking originates from a single source. In this paper, we relax this underlying assumption and
consider a multiplicity of sectors which independently break supersymmetry, thus yielding a corresponding
multiplicity of goldstini. While one linear combination of goldstini is eaten via the
super-Higgs mechanism, the orthogonal combinations remain in the spectrum as physical degrees of
freedom. Interestingly, supergravity effects induce a universal tree-level mass for the goldstini which
is exactly twice the gravitino mass. Since visible sector fields can couple dominantly to the goldstini
rather than the gravitino, this framework allows for substantial departures from conventional
supersymmetric phenomenology. In fact, this even occurs when a conventional mediation scheme
is augmented by additional supersymmetry breaking sectors which are fully sequestered. We discuss
a number of striking collider signatures, including various novel decay modes for the lightest
observable-sector supersymmetric particle, gravitinoless gauge-mediated spectra, and events with
multiple displaced vertices. We also describe goldstini cosmology and the possibility of goldstini
dark matter.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1007/jhep03(2010)073
