Radiative Higgs-Sector Cp Violation in the MSSM

Abstract

We briefly review the phenomenological implications of the minimal supersymmetric standard model (MSSM) with explicit radiative breaking of CP invariance in the Higgs sector for the LEP2 and Tevatron colliders.It has recently been shown 1 that the tree-level CP invariance of the MSSM Higgs potential can sizeably be broken at the one-loop level by large soft CPviolating trilinear couplings of the Higgs bosons to stop and sbottom squarks. Several recent studies 2,3,4,5,6 have been devoted to analyze in more detail the effective Higgs potential of the MSSM with explicit radiative breaking of CP invariance. We shall briefly review the main phenomenological implications of this rather rich and very predictive theoretical framework of the MSSM for the LEP2 and Tevatron colliders.In the MS scheme, the one-loop CP-violating effective potential of the MSSM is given bywhere L 0 V is the tree-level Lagrangian of the MSSM Higgs potential, andm q and m qi are the field-dependent quark and squark masses of the third generation. Here, we adopt the notation of Refs. [1,2,5]. The minimization of the CP-violating effective potential differs from that in the CP-conserving case by the presence of a non-trivial CP-odd tadpole condition 1 of the would-be CP-odd scalar a. In the MS scheme, the CP-odd tadpole condition reads 1,7where a

Unraveling models of CP violation through electric dipole moments of light nuclei

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“…Other mixing elements modify CP conserving H i V V couplings. The ratio of the CP-even H i V V coupling in this scenario to the SM H i V V coupling is written as [30] g…”