CEDM constraints on modified sfermion universality and spontaneous CP violation

Abstract

We discuss the supersymmetric CP problem that arises when the sfermion soft mass universality is modified. We place the 3rd generation SU(5) ten-plet sfermion masses in the weak scale in view of the naturalness. The other sfermion masses are assumed to be universal and a TeV scale in order to weaken the flavor changing neutral current processes and electric dipole moment (EDM) constraints. However this modification generically induces too large up quark chromo-EDM (CEDM) via the weak scale stop loop. In order to suppress this CEDM, we propose certain type of flavor structure where the parameters of the up-(s)quark sector are real whereas those of the down-(s)quark and the charged (s)lepton sectors are complex at the GUT scale. It is shown that, in this set up, up quark CEDM can be suppressed within the range where the current and future experiments have their sensitivity. We briefly illustrate the simple realization of these particular forms of the modified sfermion universality with real up-(s)quark sector by spontaneous CP violation in E${}_6$ SUSY GUT with SU(2) flavor symmetry.

Hg EDM bound updated, content modified, figure added, typos corrected, references added

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Cited by in corpus (10)

• LHC signature of supersymmetric models with non-universal sfermion masses
• Flavor structure of E6 GUT models
• Constraint from recent ATLAS results on non-universal sfermion mass models and naturalness
• Leptogenesis in $E_6\times U(1{)}_A$ SUSY GUT model
• CP asymmetries of B to phi K_S and B to eta' K_S in SUSY GUT Model with Non-universal Sfermion Masses
• Nucleon decay via dimension-6 operators in $E_6\times SU(2{)}_F\times U(1{)}_A$ SUSY GUT model
• Neutrino properties in E6 x SU(2)F SUSY GUT with spontaneous CP violation
• Constraints of chromoelectric dipole moments to natural SUSY type sfermion spectrum
• Sizable D-term contribution as a signature of $E_6\times SU(2{)}_F\times U(1{)}_A$ SUSY GUT model
• Heavy gravitino, naturalness, and sizable anomaly mediation