Spontaneous CP Violation and Light Particles in The Littlest Higgs
Abstract
Little Higgs models often feature spontaneously broken extra global symmetries, which must also be explicitly broken in order to avoid massless Goldstone modes in the spectrum. We show that a possible conflict with collective symmetry breaking then implies light modes coupled to the Higgs boson, leading to interesting phenomenology. Moreover, spontaneous CP violation is quite generic in such cases, as the explicit breaking may be used to stabilize physical CP odd phases in the vacuum. We demonstrate this in an SU(2) \times SU(2) \times U(1) variant of the Littlest Higgs, as well as in an original SU(6)/SO(6) model. We show that even a very small explicit breaking may lead to large phases, resulting in new sources of CP violation in this class of models.
Keywords
Cite
@article{arxiv.1003.4779,
title = {Spontaneous CP Violation and Light Particles in The Littlest Higgs},
author = {Ze'ev Surujon and Patipan Uttayarat},
journal= {arXiv preprint arXiv:1003.4779},
year = {2011}
}
Comments
Added novel Higgs phenomenology and extended conclusions. To be published in Physical Review D