CP-safe gravity mediation and muon g-2

Sho, Iwamoto and Yanagida, T. T. and Yokozaki, N. (2015) CP-safe gravity mediation and muon g-2. PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2015 (7). ISSN 2050-3911

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Abstract

We propose a CP-safe gravity mediation model, where the phases of the Higgs B parameter, scalar trilinear couplings and gaugino mass parameters are all aligned. Since all dangerous CP violating phases are suppressed, we are now safe to consider low-energy SUSY scenarios. As an application, we consider a gravity mediation model explaining the observed muon g−2 anomaly. The CP-safe property originates in two simple assumptions: SUSY breaking in the K¨ahler potential and a shift symmetry of a SUSY breaking field Z. As a result of the shift symmetry, the imaginary part of Z behaves as a QCD axion, leading to an intriguing possibility: the strong CP problem in QCD and the SUSY CP problem are solved simultaneously.

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