First Evidence of New Physics in b <--> s Transitions

arxiv: 0803.0659 · v2 · pith:DVEMJFRKnew · submitted 2008-03-05 · ✦ hep-ph

First Evidence of New Physics in b <--> s Transitions

The UTfit Collaboration: M. Bona , M. Ciuchini , E. Franco , V. Lubicz , G. Martinelli , F. Parodi , M. Pierini , C. Schiavi

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L. Silvestrini V. Sordini A. Stocchi V. Vagnoni

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classification ✦ hep-ph

keywords physicsevidencefirstmixingmodelresultsigmasignificance

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We combine all the available experimental information on Bs mixing, including the very recent tagged analyses of Bs to J/Psi phi by the CDF and D0 collaborations. We find that the phase of the Bs mixing amplitude deviates more than 3 sigma from the Standard Model prediction. While no single measurement has a 3 sigma significance yet, all the constraints show a remarkable agreement with the combined result. This is a first evidence of physics beyond the Standard Model. This result disfavours New Physics models with Minimal Flavour Violation with the same significance.

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First Evidence of New Physics in b <--> s Transitions

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