Hidden Fine Tuning In The Quark Sector Of Little Higgs Models

Abstract

In Little Higgs models a collective symmetry prevents the higgs from acquiring a quadratically divergent mass at one loop. We have previously shown that the couplings in the Littlest Higgs model introduced to give the top quark a mass do not naturally respect the collective symmetry. We extend our previous work showing that the problem is generic: it arises from the fact that the would be collective symmetry of any one top quark mass term is broken by gauge interactions.

Talk given at the 35th International Conference of High Energy Physics - ICHEP2010, July 22-28, 2010, Paris France