Composite Little Higgs
I'll describe a natural UV complete theory with a composite little Higgs.
Below a TeV there is the minimal Standard Model with a light Higgs, and an
extra neutral scalar. At the TeV scale there are additional scalars, gauge
bosons, and vector-like charge 2/3 quarks, whose couplings to the Higgs
greatly reduce the UV sensitivity of the Higgs potential. Stabilization of
the Higgs mass squared parameter, without finetuning, occurs due to a
softly broken shift symmetry--the Higgs is a pseudo Nambu-Goldstone boson.
Above the 10 TeV scale the theory has new strongly coupled interactions. A
perturbatively renormalizable UV completion, with softly broken
supersymmetry at 10 TeV is explicitly worked out. The theory contains new
particles which are odd under an exact "dark matter parity",
(-1)^{(2S+3B+L)}. We argue that such a parity is likely to be a feature of
many theories of new TeV scale physics. The lightest parity odd particle,
or "LPOP", is most likely a neutral fermion, and may make a good dark
matter candidate, with similar experimental signatures to the neutralino
of the MSSM.
hep group
Last modified: Wed Sep 17 21:35:31 EDT 2003