First hint of non-standard CP violation from B --> Phi K_S decay

Details First hint of non-standard CP violation from B --> Phi K_S decay First hint of non-standard CP violation from B --> Phi K_S decay

2002-07-30

arxiv.org/abs/hep-ph/0207356v3

Phys.Rev. D66 (2002) 071502

Physics

High Energy Physics

High Energy Physics - Phenomenology

references added and minor text changes; conclusions unchanged; PRD version; 5 pages, 2 figures, uses espcrc2.sty

Scientific paper

10.1103/PhysRevD.66.071502

We comment on the implications of the recently measured CP asymmetry in B --> Phi K_S decay. The data disfavor the Standard Model at 2.7 sigma and -if the trend persists in the future with higher statistics - require the existence of CP violation beyond that in the CKM matrix. In particular, the b --> s bar{s} s decay amplitude would require new contributions of comparable size to the Standard Model ones with an order one phase. While not every model can deliver such a large amount of CP and flavor violation, those with substantial FCNC couplings to the Z can reproduce the experimental findings.

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