PS08 Physics Beyond the Standard Model
Little Higgs phenomenology
Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA
Accepted: 22 October 2003
Published online: 28 October 2003
Recently a new class of models has emerged that addresses the naturalness problem of a light Higgs boson. In these “little Higgs” models, the Standard Model Higgs boson is a pseudo-Nambu-Goldstone boson of an approximate global symmetry. The Higgs boson acquires mass radiatively only through “collective breaking” of the global symmetry, so that more than one interaction is required to give the Higgs a mass. This protects the Higgs mass from receiving quadratically divergent radiative corrections at one-loop. These models contain new vector bosons, fermions and scalars at the TeV scale that cancel the quadratic divergences in the Higgs mass due to the Standard Model gauge, top quark, and Higgs boson loops. In this talk I review the phenomenology of the little Higgs models, focusing on collider signatures and electroweak precision constraints.
© Società Italiana di Fisica, Springer-Verlag, 2004