Direct CP asymmetry of b -> s gamma and b -> d gamma in models beyond the Standard Model

Details Direct CP asymmetry of b -> s gamma and b -> d gamma in models beyond the Standard Model Direct CP asymmetry of b -> s gamma and b -> d gamma in models beyond the Standard Model

2002-02-06

arxiv.org/abs/hep-ph/0202044v1

Nucl.Phys.Proc.Suppl. 111 (2002) 276-278

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 6 figures, to appear in the proceedings of KEKTC5

Scientific paper

10.1016/S0920-5632(02)01720-6

We study the direct CP asymmetry of the decays b -> s gamma and b -> d gamma in the context of two models: i) a supersymmetric (SUSY) model with unconstrained SUSY phases, and ii) a model with a single generation of vector quarks. In both the above models we show that b -> d gamma can sizeably influence the combined asymmetry (i.e. that of a sample containing both b -> s gamma and b -> d gamma), and in case (ii) may in fact be the dominant contribution.

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