Selecting supersymmetric string scenarios from sparticle spectra

Benjamin C. Allanach, David Grellscheid, Fernando Quevedo

Research output: Contribution to journalArticlepeer-review


We approach the following question: if supersymmetry is discovered, how can we select among different supersymmetric extensions of the Standard Model? In particular, we perform an analysis of the sparticle spectrum in low-energy string effective theories, asking which observables best distinguish various scenarios. We examine scenarios differing by the fundamental string scale and concentrate on GUT and intermediate scale models. We scan over four parameters (two goldstino angles, tan β and the gravitino mass) in each scenario, finding ratios of sparticle masses that provide the maximum discrimination between them. The necessary accuracy for discrimination is determined in each case. We find that the required accuracy on various sparticle mass ratios is at the few percent level, a precision that may be achieved in future linear colliders. We also map out phenomenologically viable regions of parameter space.

Original languageEnglish (US)
Pages (from-to)1151-1174
Number of pages24
JournalJournal of High Energy Physics
Issue number5
StatePublished - May 1 2002


  • Beyond Standard Model
  • Supersymmetric Standard Model
  • Supersymmetry Breaking

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'Selecting supersymmetric string scenarios from sparticle spectra'. Together they form a unique fingerprint.

Cite this