Twin Higgs With T parity

Abstract

In twin Higgs models, a discrete Z2 symmetry between the standard model Higgs and the twin Higgs is introduced to address the hierarchy problem. In this work, we propose another discrete symmetry in twin Higgs: the T parity, which maps the twin Higgs quadruplet into its mirror copy. The T parity brings us a whole group of T-odd particles, and leads to a promising dark matter candidate. We present one realization of the T parity twin Higgs scenario by implementing the $SU(2{)}_L\times SU(2{)}_R\times U(1{)}_1\times U(1{)}_2$ gauge symmetry in twin Higgs model. In this specific setup, the T-odd U(1) gauge boson could be the dark matter candidate, and the T-odd particles have very distinct and interesting phenomenology.

Comments: 11 pages, 5 figures, 1 table