Brian Batell (University of Pittsburgh )
Tue. February 26th, 2019, 11:30 am-12:30 pm
Breaking Mirror Hypercharge in Twin Higgs Models
The Twin Higgs is a novel framework to understand the stability of the Higgs mass in the face of increasingly stringent LHC bounds on colored top partners. Two principal structural questions in this framework concern the nature of the twin hypercharge gauge symmetry and the origin of the Z2 symmetry breaking needed to achieve the correct vacuum alignment. After an introduction to this framework, a simple extension of the Mirror Twin Higgs model with an exact Z2 symmetry is presented in which a new scalar field in the twin sector spontaneously breaks both twin hypercharge and Z2. The implications for cosmology and phenomenology will be also be discussed.