The total one-loop effective scalar Lagrangian is given in an explicitly field-redefinition-invariant form for a general model with derivative self-couplings of the scalars and scalar couplings to graviton, gauge, and fermion fields. This result is then specialized to no-scale models, with a form of the Kahler potential that is suggested by the zero-slope limit of superstring theories.(2.17) where -.

Planned collider experiments will decisively test the color SU(5) model of Foot and Hernandez, in which an extended QCD group is broken at the TeV scale. Constraints from cosmology and from neutral-kaon mixing imply that exotic charge-; fermions of this model cannot all be given masses above about 1 TeV. These "quirks" carry a new strong confining force, from the surviving unbroken gauge symmetry. Searches for the leptonic decay products of quirkonium at CERN LEP I1 will probe quirk masses up to near the beam energy, while searches at planned hadron colliders will be sensitive to quirk masses all the way up to the TeV upper bound.

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