SUSY breaking and CP violation in E6 grand unified theory with horizontal symmetry

Journal Article · Tue May 13 00:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2939046· OSTI ID:21143436

Maekawa, Nobuhiro ^[1]

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1. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)

We introduce various attractive features of E{sub 6} grand unified theory (GUT). First of all, we remind that in SU(5) GUT, the various hierachical structures of the masses and mixings of quarks and leptons can be explained by introducing an assuption. We show that E{sub 6} GUT can naturally explain the assumption. In other words, in E{sub 6} GUT, from only one basic Yukawa hierarchy corresponding up-type quark Yukawa couplings, all the other Yukawa hierachies can be obtained. Moreover, if we introduce the horizontal symmetry, SU(2){sub H} or SU(3){sub H} which can unify all the three generation quarks and leptons, not only the SUSY flavor problem but also the SUSY CP problem can be solved by spontaneous CP violation. The constraints from the chromo electric dipole moments can be satisfied in a non-trivial way. It is non-trivial that the discrete symmetry Z{sub 12}, which is required to avoid a problem in solving the SUSY CP problem in this model, is consistent with the E{sub 6} Higgs sector in which the doublet-triplet splitting problem can be solved with the anomalous U(1) gauge symmetry. The E{sub 6} GUT with the horizontal symmetry predicts peculiar sfermion masses which can be tested in future experiments on lepton flavor violations and on CP violation in B mesons. Some of them can be tested in near future experiments. This talk is based on various papers collaborated with M. Bando, T. Yamashita, S.-G. Kim, K. Sakurai, A. Matsuzaki, T. Yoshikawa, and M. Ishiduki.

• OSTI ID: 21143436
• Journal Information: AIP Conference Proceedings, Vol. 1015, Issue 1; Conference: International workshop on grand unified theories: Current status and future prospects, Kusatsu, Shiga (Japan), 17-19 Dec 2007; Other Information: DOI: 10.1063/1.2939046; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
CP INVARIANCE
ELECTRIC DIPOLE MOMENTS
FLAVOR MODEL
GAUGE INVARIANCE
GRAND UNIFIED THEORY
HIGGS BOSONS
HIGGS MODEL
LEPTONS
QUANTUM CHROMODYNAMICS
QUARKS
REST MASS
SPARTICLES
SU-2 GROUPS
SU-3 GROUPS
SUPERSYMMETRY
SYMMETRY BREAKING
TRIPLETS
U-1 GROUPS