CP Violation in Supersymmetric U(1)' Models

Abstract

The supersymmetric CP problem is studied within superstring-motivated extensions of the MSSM with an additional U(1)' gauge symmetry broken at the TeV scale. This class of models offers an attractive solution to the mu problem of the MSSM, in which U(1)' gauge invariance forbids the bare mu term, but an effective mu parameter is generated by the vacuum expectation value of a Standard Model singlet S which has superpotential coupling of the form SH_uH_d to the electroweak Higgs doublets. The effective mu parameter is thus dynamically determined as a function of the soft supersymmetry breaking parameters, and can be complex if the soft parameters have nontrivial CP-violating phases. We examine the phenomenological constraints on the reparameterization invariant phase combinations within this framework, and find that the supersymmetric CP problem can be greatly alleviated in models in which the phase of the SU(2) gaugino mass parameter is aligned with the soft trilinear scalar mass parameter associated with the SH_uH_d coupling. We also study how the phases filter into the Higgs sector, and find that while the Higgs sector conserves CP at the renormalizable level to all orders of perturbation theory, CP violation can enter at the nonrenormalizable level at one-loop order. In the majority of the parameter space, the lightest Higgs boson remains essentially CP even but the heavier Higgs bosons can exhibit large CP-violating mixings, similar to the CP-violating MSSM with large mu parameter.

29 pp, 3 figs, 2 tables

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Cited by in corpus (31)

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• The Higgs Sector in a $U(1{)}^{\prime }$ Extension of the MSSM
• The Neutralino Sector in the U(1)-Extended Supersymmetric Standard Model
• Another step towards a no-lose theorem for NMSSM Higgs discovery at the LHC
• Electroweak Baryogenesis, CDM and Anomaly-free Supersymmetric U(1)-prime Models
• Sneutrino Dark Matter: Symmetry Protection and Cosmic Ray Anomalies
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• Electroweak Phase Transition in the U(1)' MSSM
• Renormalization Group Invariants in the MSSM and Its Extensions
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• Higgs bosons of a supersymmetric $E_6$ model at the Large Hadron Collider
• LEP Indications for Two Light Higgs Bosons and U(1)' Model
• Phenomenological Issues in Supersymmetry with Non-holomorphic Soft Breaking
• Higgs Bosons in supersymmetric U(1)' models with CP Violation
• Search for Gauge Extensions of the MSSM at the LHC
• Neutral Higgs bosons in the MNMSSM with explicit CP violation
• CP violation in the secluded U(1)'-extended MSSM
• Least Fine-Tuned U(1) Extended SSM
• Neutral scalar Higgs bosons in the USSM at the LHC
• Dilepton Signatures of Family Non-Universal U(1)'
• Tevatron Higgs Mass Bounds: Projecting U(1)' Models to LHC Domain
• Electric Dipole Moments in U(1)' Models
• Higgs bosons of a supersymmetric $U(1{)}^{\prime }$ model at the ILC
• Exotic quark effects on the Higgs sector of the USSM at the LHC
• Flavor and CP-violating Higgs sector in two Higgs doublet models with $U(1{)}^{\prime }$