Non-universal gaugino masses in supersymmetric SO(10)

We consider SUSY SO(10) models in which SUSY-breaking occurs via an F-term which does not transform as an SO(10) singlet. This results in non-universal GUT-scale gaugino masses leading to a different pattern of sparticle masses from what is expected in the minimal supergravity model (mSUGRA). We study three breaking chains of SO(10) down to the standard model through SU(4) x SU(2) x SU(2), SU(2) x SO(7) and 'flipped' SU(5) achieved by the representations 54 and 210 which appear in the symmetric product of two SO(10) adjoints. We examine the phenomenological implications of the different boundary conditions corresponding to the different breaking chains and present the sparticle spectrum. (C) 2002 Elsevier Science B.V. All rights reserved.