What if supersymmetry breaking appears below the GUT scale?

John Ellis, Keith A. Olive, Pearl Sandick

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


We consider the possibility that the soft supersymmetry-breaking parameters m1 / 2 and m0 of the MSSM are universal at some scale Min below the supersymmetric grand unification scale MGUT, as might occur in scenarios where either the primordial supersymmetry-breaking mechanism or its communication to the observable sector involve a dynamical scale below MGUT. We analyze the (m1 / 2, m0) planes of such sub-GUT CMSSM models, noting the dependences of phenomenological, experimental and cosmological constraints on Min. In particular, we find that the coannihilation, focus-point and rapid-annihilation funnel regions of the GUT-scale CMSSM approach and merge when Min ∼ 1012   GeV. We discuss sparticle spectra and the possible sensitivity of LHC measurements to the value of Min.

Original languageEnglish (US)
Pages (from-to)389-399
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4
StatePublished - Nov 16 2006

Bibliographical note

Funding Information:
The work of K.A.O. and P.S. was supported in part by DOE grant DE-FG02-94ER-40823.


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