Christopher T. Hill

Christopher T. Hill (born June 9, 1951) is an American theoretical physicist at the Fermi National Accelerator Laboratory. He did undergraduate work in physics at M.I.T. (B.S., M.S., 1972), and graduate work at Caltech (Ph.D., 1977, Murray Gell-Mann). Hill's Ph.D. thesis, "Higgs Scalars and the Nonleptonic Weak Interactions" (1977) contains the first detailed discussion of the two-Higgs-doublet model.

Hill has made contributions to dynamical theories of electroweak symmetry breaking, and is an originator of the top quark infrared fixed point,top quark condensates,topcolor, top-seesaw models, and dimensional deconstruction. He is also an originator of cosmological models of dark energy and dark matter based upon ultra-low mass (Nambu-Goldstone) bosons generally associated with neutrino masses.

With David Schramm (astrophysicist), he developed transport equations describing the evolution of the spectrum of ultra-high-energy (UHE) cosmic rays and proposed modern theories of the origin of ultra-high-energy (UHE) nucleons and (UHE) neutrinos from grand unification relics, such as cosmic strings and monopole annihilation.