B ->phi K-S and supersymmetry

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The rare decay B-->phiK(S) is a well-known probe of physics beyond the standard model because it arises only through loop effects yet has the same time-dependent CP asymmetry as B-->psiK(S). Motivated by recent data suggesting new physics in B-->phiK(S), we look to supersymmetry for possible explanations, including contributions mediated by gluino loops and by Higgs bosons. Chirality-preserving LL and RR gluino contributions are generically small, unless gluinos and squarks masses are close to the current lower bounds. Higgs contributions are also too small to explain a large asymmetry if we impose the current upper limit on B(B-s-->mu(+)mu(-)). On the other hand, chirality-flipping LR and RL gluino contributions can provide sizable effects and while remaining consistent with related results in B-->psiK(S), DeltaM(s), B-->X(s)gamma and other processes. We discuss how the LR and RL insertions can be distinguished using other observables, and we provide a string-based model and other estimates to show that the needed sizes of mass insertions are reasonable.
Publisher
AMER PHYSICAL SOC
Issue Date
2004-08
Language
English
Article Type
Article
Keywords

CP VIOLATION; QCD FACTORIZATION; STANDARD MODEL; B DECAYS; ASYMMETRY; PHYSICS; COUPLINGS; SYSTEM; B-0

Citation

PHYSICAL REVIEW D, v.70, pp.1691 - 1702

ISSN
1550-7998
DOI
10.1103/PhysRevD.70.035015
URI
http://hdl.handle.net/10203/82379
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