First hint of nonstandard CP violation from B ->phi K-S decay

作者：Hiller G^*

来源：Physical Review D – Particles and Fields, 2002, 66(7): 071502.

DOI：10.1103/PhysRevD.66.071502

We comment on the implications of the recently measured CP asymmetry in B-->phiK(S) decay. The data disfavor the standard model at 2.7sigma 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 (s) over bars 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.

• 出版日期2002-10-1