The Higgs boson mass constraint and the CP even-CP odd Higgs boson mixing in an MSSM extension

Understand

One loop contributions to the CP even-CP odd Higgs boson mixings arising from contributions due to exchange of a vectorlike multiplet are computed under the Higgs boson mass constraint.

• The vectorlike multiplet consists of a fourth generation of quarks and a mirror generation.
• This sector brings in new CP phases which can be large consistent with EDM constraints.
• In this work we compute the contributions from the exchange of quarks and mirror quarks $t_{4L}, t_{4R}, T_{L}, T_{R}$, and their scalar partners, the squarks and the mirror squarks.