Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-10-04
JHEP 0803:025,2008
Physics
High Energy Physics
High Energy Physics - Theory
33 pages, 1 figure; v2: typos, references, minor corrections
Scientific paper
10.1088/1126-6708/2008/03/025
I show that the effective action of string compactifications has a structure that can naturally solve the supersymmetric flavour and CP problems. At leading order in the g_s and \alpha' expansions, the hidden sector factorises. The moduli space splits into two mirror parts that depend on Kahler and complex structure moduli. Holomorphy implies the flavour structure of the Yukawa couplings arises in only one part. In type IIA string theory flavour arises through the Kahler moduli sector and in type IIB flavour arises through the complex structure moduli sector. This factorisation gives a simple solution to the supersymmetric flavour and CP problems: flavour physics is generated in one sector while supersymmetry is broken in the mirror sector. This mechanism does not require the presence of gauge, gaugino or anomaly mediation and is explicitly realised by phenomenological models of IIB flux compactifications.
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