Two Higgs doublet models with local U(1) gauge symmetry and dark matter

por Dr. Chaehyun Yu (KIAS)

miércoles 2 abr. 2014 15:30 → 16:00 Europe/Madrid

4-4-4426 - Seminari Física Teòrica (Campus Burjassot)

In the 2HDMs, an ad hoc Z_2 symmetry is typically imposed in order to avoid the flavor problems. We propose to introduce local U(1) Higgs flavor symmetry, that distinguishes one Higgs doublet from the other. Then the U(1) gauge symmetry could be the origin of the Z_2 symmetry. We study phenomenology of this model by taking into account various theoretical and experimental constraints. We also study 2HDMs with a candidate for the dark matter and discuss the stability condition and dark matter physics.