Sum rules for extended electroweak symmetry breaking sectors
by Dr. Ryo Nagai (Tohoku University)
at CTPU Seminar Room
I plan to discuss the extended electroweak symmetry breaking (EWSB) scenarios by applying “unitarity sum rules”, which are required conditions on low-energy coefficients to ensure unitarity. The sum rules tell us nontrivial relationship between the properties of new particles/phenomena and the low-energy observables such as the 125GeV Higgs signal strengths (coupling strengths). In this talk, we discuss the implications of the sum rules in two kinds of extended EWSB scenarios : (i) EWSB with extra Higgs bosons (based on Ref. ) and (ii) EWSB with extra spin-1 particles (based on Ref. ).