B(d) --> phi K(S) CP asymmetries as an important probe of supersymmetry

Details B(d) --> phi K(S) CP asymmetries as an important probe of supersymmetry B(d) --> phi K(S) CP asymmetries as an important probe of supersymmetry

2003-04-24

arxiv.org/abs/hep-ph/0304239v2

Phys.Rev.Lett.90:141803,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 4 figures. A few typos in the abstract are corrected. This is a shortened version of hep-ph/0212092

Scientific paper

10.1103/PhysRevLett.90.141803

The decay $B_d \to \phi K_S$ is a special probe of physics beyond the Standard Model (SM), since it has no SM tree level contribution. Motivated by recent data suggesting a deviation from the SM for its time-dependent CP asymmetry, we examine supersymmetric explanations. Chirality preserving contributions are generically small, unless gluino is relatively light. Higgs contributions are also too small to explain a large asymmetry. Chirality flipping $LR$ and $RL$ gluino contributions actually can provide sizable effects without conflict with all related results. We discuss how various insertions can be distinguished, and argue the needed sizes of mass insertions are reasonable.

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