Details

Autor(en) / Beteiligte

• Iwamoto, Sho
• Yanagida, Tsutomu T.
• Yokozaki, Norimi

Titel

CP-safe gravity mediation and muon g − 2

Ist Teil von

• Progress of theoretical and experimental physics, 2015-07, Vol.2015 (7), p.73

Ort / Verlag

Oxford University Press

Erscheinungsjahr

2015

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We propose a CP-safe minimal supersymmetric (SUSY) standard model in gravity mediation, 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 under the assumption that the SUSY flavor-changing neutral current problem is solved. 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 Kähler potential and the shift symmetry of a SUSY-breaking field $Z$ . As a result of the shift symmetry, the imaginary part of $Z$ behaves as a QCD (quantum chromodynamics) axion, leading to an intriguing possibility: the strong CP problem in QCD and the SUSY CP problem are solved simultaneously.